Xml之Sax解析

 <?xml version="1.0" encoding="UTF-8" ?> 

- <cats>

- cat
             4 
           

 id>1</> 

 name>波斯猫
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             7 
           

- 
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 >2
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 >机器猫
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- 
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 >3
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 >越野猫
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- 
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 >4
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 >装甲猫
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- 
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 >5
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 >超音速猫
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 >
 
          
         
        
       
      
     
    
 
    
 
     
 
    
 
    
   
  
 

   代码 
 
 
 
 
   
   
 
    
 
      
    
 
    
 
     
 
      
 
       
 
        
 
         
 
          
 
          
 
           
 
          
 
         
 
         
 
         
 
         
 
         
 
          
 
          
 
         
 
         
 
          
 
           
 
            

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public class Demo01 {
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 /**
 
          
 
          
 
           
 
            

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  * @param args
 
          
 
          
 
           
 
            

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  * @throws Exception 
 
          
 
          
 
           
 
            

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  * @throws ParserConfigurationException 
 
          
 
          
 
           
 
            

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  */
 
          
 
          
 
           
 
            

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 static void main(String[] args) throws ParserConfigurationException,Exception {
 
          
 
          
 
           
 
            

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  //1.创建解析器工厂
 
          
 
          
 
           
 
            

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  SAXParserFactory factory = SAXParserFactory.newInstance();
 
          
 
          
 
           
 
            

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  //2.利用工厂创建解析器的对象
 
          
 
          
 
           
 
            

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  SAXParser parser = factory.newSAXParser();
 
          
 
          
 
           
 
            

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  //3.解析xml
 
          
 
          
 
           
 
            

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  MyHandler dh = new MyHandler();
 
          
 
          
 
           
 
            

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  parser.parse("cat.xml",dh);
 
          
 
          
 
           
 
            

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  List<Cat> list = dh.getList();
 
          
 
          
 
           
 
            

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  for(Cat cat:list){
 
          
 
          
 
           
 
            

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   System.out.println(cat);
 
          
 
          
 
           
 
            

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  }
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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}
 
          
 
         
 
        
 
       
 
      
 
     
 
     
 
     
 
     
 
      
 
      
 
     
 
    
 
   
 
   
 
 
 
 
  
 
   
 
    
 
      
    
 
    
 
     
 
      
 
       
 
        
 
         
 
          
 
          
 
           
 
          
 
         
 
         
 
         
 
         
 
          
 
         
 
         
 
          
 
           
 
            

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public class MyHandler extends DefaultHandler {
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 /**
 
          
 
          
 
           
 
            

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  * 用于保存解析结果的List
 
          
 
          
 
           
 
            

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  */
 
          
 
          
 
           
 
            

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 private List<Cat> list;
 
          
 
          
 
           
 
            

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 public List<Cat> getList() {
 
          
 
          
 
           
 
            

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  return list;
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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  * 用于保存当前正在解析的标签
 
          
 
          
 
           
 
            

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 private String tag;
 
          
 
          
 
           
 
            

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  * 当前正在组装的cat对象
 
          
 
          
 
           
 
            

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 private Cat cat;
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 @Override
 
          
 
          
 
           
 
            

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 public void startDocument() throws SAXException {
 
          
 
          
 
           
 
            

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  list = new ArrayList<Cat>();
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 public void startElement(String uri,String localName,String qName,Attributes attributes) 
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  tag = qName;//保存当前正在解析哪个标签
 
           
          
 
           
 
            

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  //qName:解析到的开始标签的标签名
 
          
 
          
 
           
 
            

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  if("cat".equals(qName)){//注意字符串必须与xml中的标签完全一样,否则解析不出来
 
          
 
          
 
           
 
            

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   cat = new Cat();
 
          
 
          
 
           
 
            

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  }
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 public void endElement(String uri,String qName) 
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  //qName::解析到的结束标签的标签名
 
           
          
 
           
 
            

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  tag = "";//为了防止tag没清空,读到空白文本,走characters时,将对象的属性值赋值成空白文本
 
          
 
          
 
           
 
            

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  //遇到了</cat>说明该对象组装完毕,可以加入list
 
          
 
          
 
           
 
            

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   list.add(cat);
 
          
 
          
 
           
 
            

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  }
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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?
 
          
 
          
 
           
 
            

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 public void characters(char[] ch,int start,int length) 
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  String content = new String(ch,start,length);
 
           
          
 
           
 
            

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  "id".equals(tag)){//如果当前正在解析的是id
 
          
 
          
 
           
 
            

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   cat.setId(content);
 
          
 
          
 
           
 
            

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  }else "name".equals(tag)){
 
          
 
          
 
           
 
            

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   cat.setName(content);
 
          
 
          
 
           
 
            

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  }
 
          
 
          
 
           
 
            

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 }
 
          
 
          
 
           
 
            

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}
 
          
 
          
         
        
       
      
     
 
     
 
      
 
     
 
     
    
   
  
 
   
 
     
     
 
      
 
        
      
 
      
 
       
 
        
 
         
 
          
 
           
 
            
 
            
 
             
 
            
 
           
 
           
 
           
 
           
 
           
 
            
 
            
 
           
 
           
 
            
 
             
 
              

                1 
              
 
             
 
             
注意:不要写有参数的构造方法.因为是解析一个传一个值,不能一起传,写了还的再写一个无参的构造方法
 
            
 
            
 
             
 
              

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Cat {
 
            
 
            
 
             
 
              

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 private String id;
 
            
 
            
 
             
 
              

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 private String name;
 
            
 
            
 
             
 
              

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 public String getId() {
 
            
 
            
 
             
 
              

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  return id;
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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 public void setId(String id) {
 
            
 
            
 
             
 
              

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  this.id = id;
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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 public String getName() {
 
            
 
            
 
             
 
              

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  return name;
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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 public void setName(String name) {
 
            
 
            
 
             
 
              

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  this.name = name;
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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 @Override
 
            
 
            
 
             
 
              

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 public String toString() {
 
            
 
            
 
             
 
              

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  return "Cat [id=" + id + ",name=" + name + "]";
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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}
 
            
 
           
 
          
 
         
 
        
 
       
 
       
 
       
 
       
 
        
 
        
 
       
 
      
 
     
 
     
   
 
   

     2一个学生(标签不带属性信息) 
   
 
  
 
  
 
 
  
 
   
 
    
 
      
    
 
    
 
     
 
      
 
       
 
        
 
         
 
          
 
          

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 version="1.0" encoding="UTF-8" ?> 
 
          
 
          
 
           
 
            

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- students>
 
          
 
          
 
           
 
            

              3 
            
 
           
 
           
- student
              4 
            
 
           
 
           
 > 
 
          
 
          
 
           
 
            

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 >zhangsan
              6 
            
 
           
 
           
 age>20
              7 
            
 
           
 
           
 sex>male
              8 
            
 
           
 
           
 
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- 
              10 
             
            
           
 
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 >lisi
              12 
             
            
           
 >21
              13 
             
            
           
 >female
              14 
             
            
           
 
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 >
 
           
          
         
        
       
      
     
 
     
 
      
 
     
 
     
    
   
  

    代码 
  
 
  
 
 
  
 
    
    
 
     
 
       
     
 
     
 
      
 
       
 
        
 
         
 
          
 
           
 
           
 
            
 
           
 
          
 
          
 
          
 
          
 
          
 
           
 
           
 
          
 
          
 
           
 
            
 
             

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/**用SAX解析student.xml
 
           
 
           
 
            
 
             

               2 
             
 
            
 
            
 * @author Administrator
 
           
 
           
 
            
 
             

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 *
 
           
 
           
 
            
 
             

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 */
 
           
 
           
 
            
 
             

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Demo01Student {
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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 throws Exception,SAXException {
 
           
 
           
 
            
 
             

               8 
             
 
            
 
            
  SAXParserFactory factory = SAXParserFactory.newInstance();
 
           
 
           
 
            
 
             

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  SAXParser parser = factory.newSAXParser();
 
           
 
           
 
            
 
             

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  File file = new File("student.xml"); 
 
           
 
           
 
            
 
             

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  MyHandler mh = new MyHandler();
 
           
 
           
 
            
 
             

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  parser.parse(file,mh);
 
           
 
           
 
            
 
             

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  ArrayList<Student> list = mh.getList();
 
           
 
           
 
            
 
             

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  Iterator<Student> it = list.iterator();
 
           
 
           
 
            
 
             

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  while(it.hasNext()){
 
           
 
           
 
            
 
             

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   Student student = it.next();
 
           
 
           
 
            
 
             

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   System.out.println(student);
 
           
 
           
 
            
 
             

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  }
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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}
 
           
 
          
 
         
 
        
 
       
 
      
 
      
 
      
 
      
 
       
 
       
 
      
 
     
 
    
 
    
  
 
  
 
   
 
    
 
     
 
       
     
 
     
 
      
 
       
 
        
 
         
 
          
 
           
 
           
 
            
 
           
 
          
 
          
 
          
 
          
 
           
 
          
 
          
 
           
 
            
 
             

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extends DefaultHandler{
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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 /**
 
           
 
           
 
            
 
             

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  * 承载着已经组装完毕的对象
 
           
 
           
 
            
 
             

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  */
 
           
 
           
 
            
 
             

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 private ArrayList<Student> list;
 
           
 
           
 
            
 
             

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 public ArrayList<Student> getList() {
 
           
 
           
 
            
 
             

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  return list;
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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  * 当前正在解析的标签
 
           
 
           
 
            
 
             

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 private String tag;
 
           
 
           
 
            
 
             

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               17 
             
 
            
 
            
  * 当前正在组装的对象
 
           
 
           
 
            
 
             

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 private Student student;
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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 @Override
 
           
 
           
 
            
 
             

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 throws SAXException {
 
           
 
           
 
            
 
             

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  list = new ArrayList<Student>();
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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  tag = qName;
 
            
           
 
            
 
             

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  "student".equals(qName)){
 
           
 
           
 
            
 
             

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   student = new Student();
 
           
 
           
 
            
 
             

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  }
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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  tag = "";
 
            
           
 
            
 
             

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   list.add(student);
 
            
           
 
            
 
             

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  }
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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  String content = length);
 
            
           
 
            
 
             

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  "id".equals(tag)){
 
           
 
           
 
            
 
             

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   student.setId(content);
 
           
 
           
 
            
 
             

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  }"name".equals(tag)){
 
           
 
           
 
            
 
             

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   student.setName(content);
 
           
 
           
 
            
 
             

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  }"age".equals(tag)){
 
           
 
           
 
            
 
             

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   student.setAge(Integer.parseInt(content));//String-->int
 
           
 
           
 
            
 
             

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  }"sex".equals(tag)){
 
           
 
           
 
            
 
             

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   student.setSex(content);
 
           
 
           
 
            
 
             

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  }
 
           
 
           
 
            
 
             

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 }
 
           
 
           
 
            
 
             

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?
 
           
 
           
 
            
 
             

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}
 
           
 
           
          
         
        
       
      
 
      
 
       
 
      
 
      
     
    
   
 
    
 
      
      
 
       
 
         
       
 
       
 
        
 
         
 
          
 
           
 
            
 
             
 
             
 
              
 
             
 
            
 
            
 
            
 
            
 
            
 
             
 
             
 
            
 
            
 
             
 
              
 
               

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Student {
 
             
 
             
 
              
 
               

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 private String id;
 
             
 
             
 
              
 
               

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 private String name;
 
             
 
             
 
              
 
               

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 private int age;
 
             
 
             
 
              
 
               

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 private String sex;
 
             
 
             
 
              
 
               

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 @Override
 
             
 
             
 
              
 
               

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 public String toString() {
 
             
 
             
 
              
 
               

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  "Student [id=" + id +  + age +  + sex + "]";
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public String getId() {
 
             
 
             
 
              
 
               

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  return id;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public void setId(String id) {
 
             
 
             
 
              
 
               

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  this.id = id;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public String getName() {
 
             
 
             
 
              
 
               

                 17 
               
 
              
 
              
  return name;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

                 19 
               
 
              
 
              
 public void setName(String name) {
 
             
 
             
 
              
 
               

                 20 
               
 
              
 
              
  this.name = name;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public int getAge() {
 
             
 
             
 
              
 
               

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  return age;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public void setAge(int age) {
 
             
 
             
 
              
 
               

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  this.age = age;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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 public String getSex() {
 
             
 
             
 
              
 
               

                 29 
               
 
              
 
              
  return sex;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

                 31 
               
 
              
 
              
 public void setSex(String sex) {
 
             
 
             
 
              
 
               

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  this.sex = sex;
 
             
 
             
 
              
 
               

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 }
 
             
 
             
 
              
 
               

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}
 
             
 
            
 
           
 
          
 
         
 
        
 
        
 
        
 
        
 
         
 
         
 
        
 
       
 
      
 
      
    
 
    

      第2个学生(标签中带有属性信息) 
    
 
   
 
   
  
 
  
 
   
 
    
 
     
 
       
     
 
     
 
      
 
       
 
        
 
         
 
          
 
           
 
           

               1 
             
 
            
 
            
version="1.0" encoding="UTF-8" ?> 
 
           
 
           
 
            
 
             

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- >
 
           
 
           
 
            
 
             

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- student id="1"
               4 
             
 
            
 
            
 > 
 
           
 
           
 
            
 
             

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- "2"
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 >
 
            
           
          
         
        
       
      
 
      
 
       
 
      
 
      
     
    
   

     代码 
   
 
   
  
 
   
 
     
     
 
      
 
        
      
 
      
 
       
 
        
 
         
 
          
 
           
 
            
 
            

                1 
              
 
             
 
             
Demo02Student {
 
            
 
            
 
             
 
              

                2 
              
 
             
 
             
?
 
            
 
            
 
             
 
              
SAXException,IOException {
 
             
            
 
             
 
              

                4 
              
 
             
 
             
  SAXParserFactory factory = SAXParserFactory.newInstance();
 
            
 
            
 
             
 
              

                5 
              
 
             
 
             
  SAXParser parser = factory.newSAXParser();
 
            
 
            
 
             
 
              

                6 
              
 
             
 
             
  File file = "student02.xml"); 
 
            
 
            
 
             
 
              

                7 
              
 
             
 
             
  MyHandler mh = new MyHandler();
 
            
 
            
 
             
 
              

                8 
              
 
             
 
             
  parser.parse(file,mh);
 
            
 
            
 
             
 
              

                9 
              
 
             
 
             
  ArrayList<Student> list = mh.getList();
 
            
 
            
 
             
 
              

                10 
              
 
             
 
             
  Iterator<Student> it = list.iterator();
 
            
 
            
 
             
 
              

                11 
              
 
             
 
             
  while(it.hasNext()){
 
            
 
            
 
             
 
              

                12 
              
 
             
 
             
   Student student = it.next();
 
            
 
            
 
             
 
              

                13 
              
 
             
 
             
   System.out.println(student);
 
            
 
            
 
             
 
              

                14 
              
 
             
 
             
  }
 
            
 
            
 
             
 
              

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 }
 
            
 
            
 
             
 
              

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?
 
            
 
            
 
             
 
              

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}
 
            
 
            
           
          
         
        
       
 
       
 
       
 
        
 
        
 
       
 
       
      
     
    
   
 
    
 
     
 
      
 
        
      
 
      
 
       
 
        
 
         
 
          
 
           
 
            
 
            
 
             
 
            
 
           
 
           
 
           
 
           
 
            
 
           
 
           
 
            
 
             
 
              

                1 
              
 
             
 
             
extends DefaultHandler{
 
            
 
            
 
             
 
              

                2 
              
 
             
 
             
?
 
            
 
            
 
             
 
              

                3 
              
 
             
 
             
 private ArrayList<Student> list;
 
            
 
            
 
             
 
              

                4 
              
 
             
 
             
 private String tag;
 
            
 
            
 
             
 
              

                5 
              
 
             
 
             
 private Student student;
 
            
 
            
 
             
 
              

                6 
              
 
             
 
             
?
 
            
 
            
 
             
 
              

                7 
              
 
             
 
             
 @Override
 
            
 
            
 
             
 
              

                8 
              
 
             
 
             
 throws SAXException {
 
            
 
            
 
             
 
              

                9 
              
 
             
 
             
  // TODO Auto-generated method stub
 
            
 
            
 
             
 
              

                10 
              
 
             
 
             
  list = new ArrayList<Student>();
 
            
 
            
 
             
 
              

                11 
              
 
             
 
             
 }
 
            
 
            
 
             
 
              

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?
 
            
 
            
 
             
 
              

                13 
              
 
             
 
             
 
                14 
              
 
             
 
             
 
                15 
              
 
             
 
             
  tag = qName;
 
            
 
            
 
             
 
              

                16 
              
 
             
 
             
  "student".equals(qName)){
 
            
 
            
 
             
 
              

                17 
              
 
             
 
             
   student = new Student();
 
            
 
            
 
             
 
              

                18 
              
 
             
 
             
   String value = attributes.getValue("id");//得到<student id="xxx">标签中id属性的值
 
            
 
            
 
             
 
              

                19 
              
 
             
 
             
   student.setId(value);
 
            
 
            
 
             
 
              

                20 
              
 
             
 
             
  }
 
            
 
            
 
             
 
              

                21 
              
 
             
 
             
 }
 
            
 
            
 
             
 
              

                22 
              
 
             
 
             
?
 
            
 
            
 
             
 
              

                23 
              
 
             
 
             
 
                24 
              
 
             
 
             
 
                25 
              
 
             
 
             
  tag = "";
 
            
 
            
 
             
 
              

                26 
              
 
             
 
             
  
                27 
              
 
             
 
             
   list.add(student);
 
             
            
 
             
 
              

                28 
              
 
             
 
             
  }
 
            
 
            
 
             
 
              

                29 
              
 
             
 
             
 }
 
            
 
            
 
             
 
              

                30 
              
 
             
 
             
?
 
            
 
            
 
             
 
              

                31 
              
 
             
 
             
 public ArrayList<Student> getList() {
 
            
 
            
 
             
 
              

                32 
              
 
             
 
             
  return list;
 
            
 
            
 
             
 
              

                33 
              
 
             
 
             
 }
 
            
 
            
 
             
 
              

                34 
              
 
             
 
             
?
 
            
 
            
 
             
 
              

                35 
              
 
             
 
             
 
                36 
              
 
              
             
 
                37 
               
              
             
  String content = length);
 
             
            
 
             
 
              

                38 
              
 
             
 
             
  "name".equals(tag)){
 
            
 
            
 
             
 
              

                39 
              
 
             
 
             
   student.setName(content);
 
            
 
            
 
             
 
              

                40 
              
 
             
 
             
  }"age".equals(tag)){
 
            
 
            
 
             
 
              

                41 
              
 
             
 
             
   student.setAge(Integer.parseInt(content));
 
            
 
            
 
             
 
              

                42 
              
 
             
 
             
  }"sex".equals(tag)){
 
            
 
            
 
             
 
              

                43 
              
 
             
 
             
   student.setSex(content);
 
            
 
            
 
             
 
              

                44 
              
 
             
 
             
  }
 
            
 
            
 
             
 
              

                45 
              
 
             
 
             
 }
 
            
 
            
 
             
 
              

                46 
              
 
             
 
             
 
 
            
 
            
 
             
 
              

                47 
              
 
             
 
             
}
 
            
 
            
           
          
         
        
       
 
       
 
        
 
       
 
       
      
     
    
 
     
 
       
       
 
        
 
          
        
 
        
 
         
 
          
 
           
 
            
 
             
 
              
 
              
 
               
 
              
 
             
 
             
 
             
 
             
 
             
 
              
 
              
 
             
 
             
 
              
 
               
 
                

                  1 
                
 
               
 
               
Student {
 
              
 
              
 
               
 
                

                  2 
                
 
               
 
               
 private String id;
 
              
 
              
 
               
 
                

                  3 
                
 
               
 
               
 private String name;
 
              
 
              
 
               
 
                

                  4 
                
 
               
 
               
 private int age;
 
              
 
              
 
               
 
                

                  5 
                
 
               
 
               
 private String sex;
 
              
 
              
 
               
 
                

                  6 
                
 
               
 
               
 @Override
 
              
 
              
 
               
 
                

                  7 
                
 
               
 
               
 public String toString() {
 
              
 
              
 
               
 
                

                  8 
                
 
               
 
               
  "]";
 
              
 
              
 
               
 
                

                  9 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  10 
                
 
               
 
               
 public String getId() {
 
              
 
              
 
               
 
                

                  11 
                
 
               
 
               
  return id;
 
              
 
              
 
               
 
                

                  12 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  13 
                
 
               
 
               
 public void setId(String id) {
 
              
 
              
 
               
 
                

                  14 
                
 
               
 
               
  this.id = id;
 
              
 
              
 
               
 
                

                  15 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  16 
                
 
               
 
               
 public String getName() {
 
              
 
              
 
               
 
                

                  17 
                
 
               
 
               
  return name;
 
              
 
              
 
               
 
                

                  18 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  19 
                
 
               
 
               
 public void setName(String name) {
 
              
 
              
 
               
 
                

                  20 
                
 
               
 
               
  this.name = name;
 
              
 
              
 
               
 
                

                  21 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  22 
                
 
               
 
               
 public int getAge() {
 
              
 
              
 
               
 
                

                  23 
                
 
               
 
               
  return age;
 
              
 
              
 
               
 
                

                  24 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  25 
                
 
               
 
               
 public void setAge(int age) {
 
              
 
              
 
               
 
                

                  26 
                
 
               
 
               
  this.age = age;
 
              
 
              
 
               
 
                

                  27 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  28 
                
 
               
 
               
 public String getSex() {
 
              
 
              
 
               
 
                

                  29 
                
 
               
 
               
  return sex;
 
              
 
              
 
               
 
                

                  30 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  31 
                
 
               
 
               
 public void setSex(String sex) {
 
              
 
              
 
               
 
                

                  32 
                
 
               
 
               
  this.sex = sex;
 
              
 
              
 
               
 
                

                  33 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  34 
                
 
               
 
               
 
 
              
 
              
 
               
 
                

                  35 
                
 
               
 
               
}
 
              
 
             
 
            
 
           
 
          
 
         
 
         
 
         
 
         
 
          
 
          
 
         
 
        
 
       
 
       
     
 
     

       一本书(标签中带有属性信息) 
     
 
     
 
      
 
       
 
        
 
          
        
 
        
 
         
 
          
 
           
 
            
 
             
 
              
 
              
 
               
 
              
 
             
 
             
 
             
 
             
 
              
 
             
 
             
 
              
 
               
 
                

                  1 
                
 
               
 
               
 version="1.0" encoding="UTF-8" ?> 
 
              
 
              
 
               
 
                

                  2 
                
 
               
 
               
- bookstore>
 
              
 
              
 
               
 
                

                  3 
                
 
               
 
               
- book category="java"
                  4 
                
 
               
 
               
 title lang="english">java基础title> 
 
              
 
              
 
               
 
                

                  5 
                
 
               
 
               
 author>gosling
                  6 
                
 
               
 
               
 year>2014
                  7 
                
 
               
 
               
 price>200
                  8 
                
 
               
 
               
 book
                  9 
                
 
               
 
               
- "android"
                  10 
                
 
                
               
 "chinese">android基础
                  11 
                 
                
               
 >google
                  12 
                 
                
               
 
                  13 
                 
                
               
 
                  14 
                 
                
               
 
                  15 
                 
                
               
 >
 
               
              
             
            
           
          
         
 
         
 
          
 
         
 
         
        
       
      

        代码 
      
 
      
     
 
       
       
 
        
 
          
        
 
        
 
         
 
          
 
           
 
            
 
             
 
              
 
              
Demo04Book {
 
               
              
 
               
 
                

                  2 
                
 
               
 
               
?
 
              
 
              
 
               
 
                
throws Exception {
 
               
              
 
               
 
                

                  4 
                
 
               
 
               
  // TODO Auto-generated method stub
 
              
 
              
 
               
 
                

                  5 
                
 
               
 
               
  SAXParserFactory factory = SAXParserFactory.newInstance();
 
              
 
              
 
               
 
                

                  6 
                
 
               
 
               
  SAXParser parser = factory.newSAXParser();
 
              
 
              
 
               
 
                

                  7 
                
 
               
 
               
  MyHandler mh = new MyHandler();
 
              
 
              
 
               
 
                

                  8 
                
 
               
 
               
  parser.parse("books.xml",mh);
 
              
 
              
 
               
 
                

                  9 
                
 
               
 
               
  ArrayList<Book> list = mh.getList();
 
              
 
              
 
               
 
                

                  10 
                
 
               
 
               
  for(Book b:list){
 
              
 
              
 
               
 
                

                  11 
                
 
               
 
               
   System.out.println(b);
 
              
 
              
 
               
 
                

                  12 
                
 
               
 
               
  }
 
              
 
              
 
               
 
                

                  13 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  14 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  15 
                
 
               
 
               
}
 
              
 
              
             
            
           
          
         
 
         
 
         
 
          
 
          
 
         
 
         
        
       
      
     
 
      
 
       
 
        
 
          
        
 
        
 
         
 
          
 
           
 
            
 
             
 
             
 
             
 
             
 
              
 
             
 
             
 
              
 
               
 
                

                  1 
                
 
               
 
               
extends DefaultHandler{
 
              
 
              
 
               
 
                

                  2 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  3 
                
 
               
 
               
 private ArrayList<Book> list;
 
              
 
              
 
               
 
                

                  4 
                
 
               
 
               
 
 
              
 
              
 
               
 
                

                  5 
                
 
               
 
               
 private String tag;
 
              
 
              
 
               
 
                

                  6 
                
 
               
 
               
 public ArrayList<Book> getList() {
 
              
 
              
 
               
 
                

                  7 
                
 
               
 
               
  return list;
 
              
 
              
 
               
 
                

                  8 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  9 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  10 
                
 
               
 
               
 private Book book;
 
              
 
              
 
               
 
                

                  11 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  12 
                
 
               
 
               
 @Override
 
              
 
              
 
               
 
                

                  13 
                
 
               
 
               
 throws SAXException {
 
              
 
              
 
               
 
                

                  14 
                
 
               
 
               
  list = new ArrayList<Book>();
 
              
 
              
 
               
 
                

                  15 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  16 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  17 
                
 
               
 
               
 
                  18 
                
 
               
 
               
 
                  19 
                
 
               
 
               
  tag = qName;
 
              
 
              
 
               
 
                

                  20 
                
 
               
 
               
  "book".equals(qName)){
 
              
 
              
 
               
 
                

                  21 
                
 
               
 
               
   book = new Book();
 
              
 
              
 
               
 
                

                  22 
                
 
               
 
               
   String value = attributes.getValue("category");
 
              
 
              
 
               
 
                

                  23 
                
 
               
 
               
   book.setCategory(value);
 
              
 
              
 
               
 
                

                  24 
                
 
               
 
               
  }"title".equals(qName)){//<title lang="english">
 
              
 
              
 
               
 
                

                  25 
                
 
               
 
               
   String value = attributes.getValue("lang");
 
              
 
              
 
               
 
                

                  26 
                
 
               
 
               
   book.setLang(value);
 
              
 
              
 
               
 
                

                  27 
                
 
               
 
               
  }
 
              
 
              
 
               
 
                

                  28 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  29 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  30 
                
 
               
 
               
 
                  31 
                
 
               
 
               
 
                  32 
                
 
               
 
               
  tag = "";
 
              
 
              
 
               
 
                

                  33 
                
 
               
 
               
  
                  34 
                
 
               
 
               
   list.add(book);
 
               
              
 
               
 
                

                  35 
                
 
               
 
               
  }
 
              
 
              
 
               
 
                

                  36 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  37 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  38 
                
 
               
 
               
 
                  39 
                
 
                
               
 
                  40 
                 
                
               
  String content = length);
 
               
              
 
               
 
                

                  41 
                
 
               
 
               
  /*<title lang="english">java基础</title>
 
              
 
              
 
               
 
                

                  42 
                
 
               
 
               
  <author>gosling</author>
 
              
 
              
 
               
 
                

                  43 
                
 
               
 
               
  <year>2014</year>
 
              
 
              
 
               
 
                

                  44 
                
 
               
 
               
  <price>200</price>*/
 
              
 
              
 
               
 
                

                  45 
                
 
               
 
               
  "title".equals(tag)){//解析"java基础"文本
 
              
 
              
 
               
 
                

                  46 
                
 
               
 
               
   book.setTitle(content);
 
              
 
              
 
               
 
                

                  47 
                
 
               
 
               
  }"author".equals(tag)){
 
              
 
              
 
               
 
                

                  48 
                
 
               
 
               
   book.setAuthor(content);
 
              
 
              
 
               
 
                

                  49 
                
 
               
 
               
  }"year".equals(tag)){
 
              
 
              
 
               
 
                

                  50 
                
 
               
 
               
   book.setYear(Integer.parseInt(content));
 
              
 
              
 
               
 
                

                  51 
                
 
               
 
               
  }"price".equals(tag)){
 
              
 
              
 
               
 
                

                  52 
                
 
               
 
               
   book.setPrice(Double.parseDouble(content));
 
              
 
              
 
               
 
                

                  53 
                
 
               
 
               
  }
 
              
 
              
 
               
 
                

                  54 
                
 
               
 
               
 }
 
              
 
              
 
               
 
                

                  55 
                
 
               
 
               
?
 
              
 
              
 
               
 
                

                  56 
                
 
               
 
               
}
 
              
 
              
             
            
           
          
         
 
         
 
          
 
         
 
         
        
       
      
 
       
 
         
         
 
          
 
            
          
 
          
 
           
 
            
 
             
 
              
 
               
 
               
 
               
 
               
 
               
 
               
 
                
 
                
 
               
 
               
 
                
 
                 
 
                  

                    1 
                  
 
                 
 
                 
Book {
 
                
 
                
 
                 
 
                  

                    2 
                  
 
                 
 
                 
 /*<book category="java">
 
                
 
                
 
                 
 
                  

                    3 
                  
 
                 
 
                 
  <title lang="english">java基础</title>
 
                
 
                
 
                 
 
                  

                    4 
                  
 
                 
 
                 
  <author>gosling</author>
 
                
 
                
 
                 
 
                  

                    5 
                  
 
                 
 
                 
  <year>2014</year>
 
                
 
                
 
                 
 
                  

                    6 
                  
 
                 
 
                 
  <price>200</price>
 
                
 
                
 
                 
 
                  

                    7 
                  
 
                 
 
                 
 </book>*/
 
                
 
                
 
                 
 
                  

                    8 
                  
 
                 
 
                 
 private String category;
 
                
 
                
 
                 
 
                  

                    9 
                  
 
                 
 
                 
 private String lang;
 
                
 
                
 
                 
 
                  

                    10 
                  
 
                 
 
                 
 private String title;
 
                
 
                
 
                 
 
                  

                    11 
                  
 
                 
 
                 
 private String author;
 
                
 
                
 
                 
 
                  

                    12 
                  
 
                 
 
                 
 private int year;
 
                
 
                
 
                 
 
                  

                    13 
                  
 
                 
 
                 
 private double price;
 
                
 
                
 
                 
 
                  

                    14 
                  
 
                 
 
                 
 @Override
 
                
 
                
 
                 
 
                  

                    15 
                  
 
                 
 
                 
 public String toString() {
 
                
 
                
 
                 
 
                  

                    16 
                  
 
                 
 
                 
  "Book [category=" + category +  + lang +  + title +  + author + 
 
                
 
                
 
                 
 
                  

                    17 
                  
 
                 
 
                 
    + year +  + price + "]";
 
                
 
                
 
                 
 
                  

                    18 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    19 
                  
 
                 
 
                 
 public String getCategory() {
 
                
 
                
 
                 
 
                  

                    20 
                  
 
                 
 
                 
  return category;
 
                
 
                
 
                 
 
                  

                    21 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    22 
                  
 
                 
 
                 
 public void setCategory(String category) {
 
                
 
                
 
                 
 
                  

                    23 
                  
 
                 
 
                 
  this.category = category;
 
                
 
                
 
                 
 
                  

                    24 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    25 
                  
 
                 
 
                 
 public String getLang() {
 
                
 
                
 
                 
 
                  

                    26 
                  
 
                 
 
                 
  return lang;
 
                
 
                
 
                 
 
                  

                    27 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    28 
                  
 
                 
 
                 
 public void setLang(String lang) {
 
                
 
                
 
                 
 
                  

                    29 
                  
 
                 
 
                 
  this.lang = lang;
 
                
 
                
 
                 
 
                  

                    30 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    31 
                  
 
                 
 
                 
 public String getTitle() {
 
                
 
                
 
                 
 
                  

                    32 
                  
 
                 
 
                 
  return title;
 
                
 
                
 
                 
 
                  

                    33 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    34 
                  
 
                 
 
                 
 public void setTitle(String title) {
 
                
 
                
 
                 
 
                  

                    35 
                  
 
                 
 
                 
  this.title = title;
 
                
 
                
 
                 
 
                  

                    36 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    37 
                  
 
                 
 
                 
 public String getAuthor() {
 
                
 
                
 
                 
 
                  

                    38 
                  
 
                 
 
                 
  return author;
 
                
 
                
 
                 
 
                  

                    39 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    40 
                  
 
                 
 
                 
 public void setAuthor(String author) {
 
                
 
                
 
                 
 
                  

                    41 
                  
 
                 
 
                 
  this.author = author;
 
                
 
                
 
                 
 
                  

                    42 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    43 
                  
 
                 
 
                 
 public int getYear() {
 
                
 
                
 
                 
 
                  

                    44 
                  
 
                 
 
                 
  return year;
 
                
 
                
 
                 
 
                  

                    45 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    46 
                  
 
                 
 
                 
 public void setYear(int year) {
 
                
 
                
 
                 
 
                  

                    47 
                  
 
                 
 
                 
  this.year = year;
 
                
 
                
 
                 
 
                  

                    48 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    49 
                  
 
                 
 
                 
 public double getPrice() {
 
                
 
                
 
                 
 
                  

                    50 
                  
 
                 
 
                 
  return price;
 
                
 
                
 
                 
 
                  

                    51 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    52 
                  
 
                 
 
                 
 public void setPrice(double price) {
 
                
 
                
 
                 
 
                  

                    53 
                  
 
                 
 
                 
  this.price = price;
 
                
 
                
 
                 
 
                  

                    54 
                  
 
                 
 
                 
 }
 
                
 
                
 
                 
 
                  

                    55 
                  
 
                 
 
                 
 
 
                
 
                
 
                 
 
                  

                    56 
                  
 
                 
 
                 
}
 
                
 
               
 
              
 
             
 
            
 
           
   
          
 
         
 
         
       
 
      
 
      
     
         
   
  
                        
（编辑：李大同）
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