利用PULL解析方式解析XML文件

需求：现在有一个XML文件，要求用PULL方式解析

文件名：students.xml

<?xml version="1.0" encoding="UTF-8"?>
<root>
     <student id="1" group="1">
         <name>张三</name>
         <sex>男</sex>
         <age>18</age>
         <email>zhangsan@163.com</email>
         <birthday>1987-06-08</birthday>
         <memo>好学生</memo>
     </student>
     <student id="2" group="2">
         <name>李四</name>
         <sex>女</sex>
         <age>18</age>
         <email>lisi@163.com</email>
         <birthday>1987-06-08</birthday>
         <memo>好学生</memo>
     </student>
     <student id="3" group="3">
         <name>小王</name>
         <sex>男</sex>
         <age>18</age>
         <email>xiaowang@163.com</email>
         <birthday>1987-06-08</birthday>
         <memo>好学生</memo>
     </student>
     <student id="4" group="4">
         <name>小张</name>
         <sex>男</sex>
         <age>18</age>
         <email>xiaozhang@163.com</email>
         <birthday>1987-06-08</birthday>
         <memo>好学生</memo>
     </student>
     <student id="5" group="5">
         <name>小明</name>
         <sex>男</sex>
         <age>18</age>
         <email>xiaoming@163.com</email>
         <birthday>1987-06-08</birthday>
         <memo>好学生</memo>
     </student>
</root>

Xml对应的实体Student文件:

package com.parsexml.entity;

public class Student {
     
     private int id;
     private int group;
     private String name;
     private String sex;
     private int age;
     private String email;
     private String memo;
     private String birthday;
     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     public int getGroup() {
         return group;
     }
     public void setGroup(int group) {
         this.group = group;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     public int getAge() {
         return age;
     }
     public void setAge(int age) {
         this.age = age;
     }
     public String getEmail() {
         return email;
     }
     public void setEmail(String email) {
         this.email = email;
     }
     public String getMemo() {
         return memo;
     }
     public void setMemo(String memo) {
         this.memo = memo;
     }
     public String getBirthday() {
         return birthday;
     }
     public void setBirthday(String birthday) {
         this.birthday = birthday;
     }
     
 }

3解析代码

package com.parsexml;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;

import com.parsexml.entity.Student;

public class PullParseXml {
     
     
     public List<Student> PullParseXML(){
         
         List<Student> list=null;
         Student student = null;
         
         //构建XmlPullParserFactory
        try {
             XmlPullParserFactory pullParserFactory=XmlPullParserFactory.newInstance();
             //获取XmlPullParser的实例
            XmlPullParser xmlPullParser=pullParserFactory.newPullParser();
             //设置输入流  xml文件
            xmlPullParser.setInput(Thread.currentThread().getContextClassLoader().getResourceAsStream("students.xml"),"UTF-8");
             
             //开始
            int eventType=xmlPullParser.getEventType();
             
             try {
                 while(eventType!=XmlPullParser.END_DOCUMENT){
                     String nodeName=xmlPullParser.getName();
                     switch (eventType) {
                     //文档开始
                    case XmlPullParser.START_DOCUMENT:
                         list=new ArrayList<Student>();
                         break;
                     //开始节点
                    case XmlPullParser.START_TAG:
                         //判断如果其实节点为student
                        if("student".equals(nodeName)){
                             //实例化student对象
                            student=new Student();
                             //设置Id属性
                            student.setId(Integer.parseInt(xmlPullParser.getAttributeValue(0)));
                             //设置Group属性
                            student.setGroup(Integer.parseInt(xmlPullParser.getAttributeValue(1)));
                         }else if("name".equals(nodeName)){
                             //设置name
                            student.setName(xmlPullParser.nextText());
                         }else if("sex".equals(nodeName)){
                             //设置sex
                            student.setSex(xmlPullParser.nextText());
                         }else if("age".equals(nodeName)){
                             //设置age
                            student.setAge(Integer.parseInt(xmlPullParser.nextText()));
                         }else if("email".equals(nodeName)){
                             //设置email
                            student.setEmail(xmlPullParser.nextText());
                         }else if("birthday".equals(nodeName)){
                             //设置birthday
                            student.setBirthday(xmlPullParser.nextText());
                         }else if("memo".equals(nodeName)){
                             //设置memo属性
                            student.setMemo(xmlPullParser.nextText());
                         }
                         break;
                     //结束节点
                    case XmlPullParser.END_TAG:
                         if("student".equals(nodeName)){
                             list.add(student);
                             student=null;
                         }
                         break;
                     default:
                         break;
                     }
                     eventType=xmlPullParser.next();
                 }
             } catch (NumberFormatException e) {
                 e.printStackTrace();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         } catch (XmlPullParserException e) {
             e.printStackTrace();
         }

         return list;
     }
     
     public static void main(String[] args) {
         List<Student> list=new PullParseXml().PullParseXML();
         for(Student student:list){
             System.out.println("id:"+student.getId()+"tgroup:"+student.getGroup()+"tname:"+student.getName()+"tsex:"+student.getSex()+"tage:"+student.getAge()+"temail:"+student.getEmail()+"tbirthday:"+student.getBirthday()+"tmemo:"+student.getMemo());
         }
     }
     
 }

（编辑：李大同）

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