Digester解析xml文件

1. publicclassArea{
2. privateintid;
3. privateStringname;
4. privateStringareaType;
5. privateintparentId;
6. privateintordering;
7. privateStringzip;
9. privateStringphoneArea;
11. publicintgetOrdering(){
12. returnordering;
13. }
14. publicvoidsetOrdering(intordering){
15. this.ordering=ordering;
16. }
17. publicStringgetAreaType(){
18. returnareaType;
19. }
20. publicvoidsetAreaType(StringareaType){
21. this.areaType=areaType;
22. }
23. publicintgetId(){
24. returnid;
25. }
26. publicvoidsetId(intid){
27. this.id=id;
28. }
29. publicStringgetName(){
30. returnname;
31. }
32. publicvoidsetName(Stringname){
33. this.name=name;
34. }
35. publicintgetParentId(){
36. returnparentId;
37. }
38. publicvoidsetParentId(intparentId){
39. this.parentId=parentId;
40. }
42. publicStringgetZip(){
43. returnzip;
44. }
46. publicvoidsetZip(Stringzip){
47. this.zip=zip;
48. }
50. publicStringgetPhoneArea(){
51. returnphoneArea;
52. }
54. publicvoidsetPhoneArea(StringphoneArea){
55. this.phoneArea=phoneArea;
56. }
57. }

1. publicclassViewCache{
2. privateListareaList=newArrayList();
3. publicListgetAreaList(){
4. returnareaList;
5. }
6. publicvoidsetAreaList(ListareaList){
7. this.areaList=areaList;
8. }
10. //供Digester调用的方法
11. publicvoidaddArea(Areaarea){
12. this.areaList.add(area);
13. }
14. }

    public class AreaDigester {  
          
        public ViewCache digester() throws Exception {  
            Digester digester = new Digester();  
            digester.setValidating(false);  
            digester.addObjectCreate("viewcache/areas",ViewCache.class);  
            // 指明匹配模式和要创建的类   
            digester.addObjectCreate("viewcache/areas/area",Area.class);  
            // 设置对象属性,与xml文件对应,不设置则是默认  
            digester.addBeanPropertySetter("viewcache/areas/area/id","id");  
            digester.addBeanPropertySetter("viewcache/areas/area/parentId","parentId");  
            digester.addBeanPropertySetter("viewcache/areas/area/name","name");  
            digester.addBeanPropertySetter("viewcache/areas/area/areaType","areaType");  
            digester.addBeanPropertySetter("viewcache/areas/area/ordering","ordering");  
            digester.addBeanPropertySetter("viewcache/areas/area/zip","zip");  
            digester.addBeanPropertySetter("viewcache/areas/area/phoneArea","phoneArea");  
            // 当移动到下一个标签中时的动作  
            digester.addSetNext("viewcache/areas/area","addArea");  
              
            ViewCache vc = null;  
            try {  

                File file = new File("viewcache.xml");
          BufferedReader read = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
          StringBuffer sb = new StringBuffer();
          String content = "";
          while((content=read.readLine()) != null){
             sb.append(content);
          }
                vc = (ViewCache) digester.parse(new StringReader(sb.toString()));  
            } catch (IOException e) {  
                throw new Exception(e);  
            } catch (SAXException e) {  
                throw new Exception(e);  
            }  
            return vc;  
        }  

    }  

1. publicclassLibrary{
2. privateStringname;
3. privateList<Book>bookList=newArrayList<Book>();
5. publicStringgetName(){
6. returnname;
7. }
9. publicvoidsetName(Stringname){
10. this.name=name;
11. }
13. publicList<Book>getBookList(){
14. returnbookList;
15. }
17. publicvoidaddBook(Bookbook){
18. bookList.add(book);
19. }
20. }

1. publicclassBook{
3. privateStringtitle;
4. privateStringauthor;
5. privateList<Chapter>chapters=newArrayList<Chapter>();
7. /**
8. *这个方法，用来演示xml的解析时用的另一种方式
9. *@paramtitle
10. *@paramauthor
11. */
12. publicvoidsetBookInfo(Stringtitle,Stringauthor){
13. this.title=title;
14. this.author=author;
15. }
17. publicvoidaddChapter(Chapterchapter){
18. this.chapters.add(chapter);
19. }
21. publicStringgetTitle(){
22. returntitle;
23. }
25. publicvoidsetTitle(Stringtitle){
26. this.title=title;
27. }
29. publicStringgetAuthor(){
30. returnauthor;
31. }
33. publicvoidsetAuthor(Stringauthor){
34. this.author=author;
35. }
37. publicList<Chapter>getChapters(){
38. returnchapters;
39. }
41. publicvoidsetChapters(List<Chapter>chapters){
42. this.chapters=chapters;
43. }
44. }

1. publicclassChapter{
3. privateStringno;
4. privateStringcaption;
6. publicStringgetNo(){
7. returnno;
8. }
10. publicvoidsetNo(Stringno){
11. this.no=no;
12. }
14. publicStringgetCaption(){
15. returncaption;
16. }
18. publicvoidsetCaption(Stringcaption){
19. this.caption=caption;
20. }
21. }

1. publicclassMainTest{
3. /**
4. *@paramargs
5. */
6. publicstaticvoidmain(String[]args){
7. //建立一个Digester对象
8. Digesterdigester=newDigester();
9. //指定它不要用DTD验证XML文档的合法性——这是因为我们没有为XML文档定义DTD
10. digester.setValidating(false);
11. //从library标签开始解析,并新建一个Library对象做为根对象
12. digester.addObjectCreate("library",Library.class);
13. //根据library标签属性值设置对象的属性,一次可以设置多个属性
14. digester.addSetProperties("library");
15. //也可以用下面的方法，指定propertyName
16. //digester.addSetProperties("library","name","name");
18. //-----第1层元素开始
19. digester.addObjectCreate("library/book",Book.class);
20. //digester.addSetProperties("library/book");
21. //可以用以下三条语句代替
22. digester.addCallMethod("library/book","setBookInfo",2);
23. digester.addCallParam("library/book",0,"title");
24. digester.addCallParam("library/book",1,"author");
25. /**
26. *addCallParam(Stringrule,intparaIndex,StringattributeName)
27. *该方法与addCallMethod配合使用
28. *intparaIndex:表明需要填充的方法形参序号,从0开始,方法由addCallMethod指定
29. *StringattributeName:指定标签属性名称
30. */
33. //-----第2层元素开始
34. digester.addObjectCreate("library/book/chapter",Chapter.class);
35. /**addBeanPropertySetter()是将子节点转换为对象的属性，这个方法还可以有第二个参数，当对象的属性名和子节点的名字不一样时用来指定对象的属性名
36. 该方法的作用及使用方法类似于addSetProperties,只不过它是用Stringrule规则所指定标签的值(而不是标签的属性)来调用对象的setter*/
37. digester.addBeanPropertySetter("library/book/chapter/no");
38. //digester.addBeanPropertySetter("library/book/chapter/no","no");
40. /**addCallMethod(Stringrule,StringmethodName,intparaNumber)方法
41. *同样是设置对象的属性,但是方式更加灵活,不需要对象具有setter
42. *当paraNumber=0时,可以单独使用(表明为标签的值来调用),不然需要配合addCallParam方法
43. */
44. //digester.addBeanPropertySetter("library/book/chapter/caption");
45. //下面的方法，可以用来代替上一句，作用是一样的
46. digester.addCallMethod("library/book/chapter/caption","setCaption",0);
48. //addSetNext()是说在再次遇到匹配节点后，调用当前对象(Chapter类的对象)的父对象(Book类的对象)的方法，方法参数是当前层元素的对象
49. digester.addSetNext("library/book/chapter","addChapter");
50. //-----第2层元素结束
52. digester.addSetNext("library/book","addBook");
53. //-----第1层元素结束
55. try{
56. //解析XML文件,并得到ROOT元素
57. Librarylibrary=(Library)digester.parse(MainTest.class.getResourceAsStream("books.xml"));
58. System.out.println("图书馆:"+library.getName());
59. System.out.println("共藏书:"+library.getBookList().size()+"本");
60. System.out.println("*****************************");
62. for(Bookbook:library.getBookList()){
63. System.out.println("书名:"+book.getTitle()+"作者:"+book.getAuthor());
64. System.out.println("------------------------------");
65. //显示章节
66. System.out.println("共"+book.getChapters().size()+"章");
67. for(Chapterchapter:book.getChapters()){
68. System.out.println(chapter.getNo()+":"+chapter.getCaption());
69. }
70. System.out.println("------------------------------");
71. }
72. }catch(IOExceptione){
73. e.printStackTrace();
74. }catch(SAXExceptione){
75. e.printStackTrace();
76. }
77. }
78. }

1. publicclassMainTest{
3. /**
4. *@paramargs
5. */
6. publicstaticvoidmain(String[]args){
7. try{
8. Digesterdigester=DigesterLoader.createDigester(DigesterXmlRuleTest.class.getResource("books-rule.xml"));
9. Librarylibrary=(Library)digester.parse(DigesterXmlRuleTest.class.getResourceAsStream("books.xml"));
10. System.out.println("图书馆:"+library.getName());
11. System.out.println("共藏书:"+library.getBookList().size()+"本");
12. System.out.println("*****************************");
14. for(Bookbook:library.getBookList()){
15. System.out.println("书名:"+book.getTitle()+"作者:"+book.getAuthor());
16. System.out.println("------------------------------");
17. //显示章节
18. System.out.println("共"+book.getChapters().size()+"章");
19. for(Chapterchapter:book.getChapters()){
20. System.out.println(chapter.getNo()+":"+chapter.getCaption());
21. }
22. System.out.println("------------------------------");
23. }
24. }catch(IOExceptione){
25. e.printStackTrace();
26. }catch(SAXExceptione){
27. e.printStackTrace();
28. }
29. }
30. }