1. importjava.io.File;
3. importjavax.xml.parsers.DocumentBuilder;
4. importjavax.xml.parsers.DocumentBuilderFactory;
6. importorg.w3c.dom.Attr;
7. importorg.w3c.dom.Comment;
8. importorg.w3c.dom.Document;
9. importorg.w3c.dom.Element;
10. importorg.w3c.dom.NamedNodeMap;
11. importorg.w3c.dom.Node;
12. importorg.w3c.dom.NodeList;
14. /**
15. *使用遞歸解析給定的任意一個xml文檔并且將其內容輸出到命令行上
16. *@authorzhanglong
17. *
18. */
19. publicclassDomTest3
20. {
21. publicstaticvoidmain(String[]args)throwsException
22. {
23. DocumentBuilderFactorydbf=DocumentBuilderFactory.newInstance();
24. DocumentBuilderdb=dbf.newDocumentBuilder();
26. Documentdoc=db.parse(newFile("student.xml"));
27. //獲得根元素結點
28. Elementroot=doc.getDocumentElement();
30. parseElement(root);
31. }
33. privatestaticvoidparseElement(Elementelement)
34. {
35. StringtagName=element.getNodeName();
37. NodeListchildren=element.getChildNodes();
39. System.out.print("<"+tagName);
41. //element元素的所有屬性所構成的NamedNodeMap對象，需要對其進行判斷
42. NamedNodeMapmap=element.getAttributes();
44. //如果該元素存在屬性
45. if(null!=map)
46. {
47. for(inti=0;i<map.getLength();i++)
48. {
49. //獲得該元素的每一個屬性
50. Attrattr=(Attr)map.item(i);
52. StringattrName=attr.getName();
53. StringattrValue=attr.getValue();
55. System.out.print(""+attrName+"=/""+attrValue+"/"");
56. }
57. }
59. System.out.print(">");
61. for(inti=0;i<children.getLength();i++)
62. {
63. Nodenode=children.item(i);
64. //獲得結點的類型
65. shortnodeType=node.getNodeType();
67. if(nodeType==Node.ELEMENT_NODE)
68. {
69. //是元素，繼續遞歸
70. parseElement((Element)node);
71. }
72. elseif(nodeType==Node.TEXT_NODE)
73. {
74. //遞歸出口
75. System.out.print(node.getNodeValue());
76. }
77. elseif(nodeType==Node.COMMENT_NODE)
78. {
79. System.out.print("<!--");
81. Commentcomment=(Comment)node;
83. //注釋內容
84. Stringdata=comment.getData();
86. System.out.print(data);
88. System.out.print("-->");
89. }
90. }
92. System.out.print("</"+tagName+">");
93. }
94. }

sax：SAX的全稱是Simple APIs for XML，也即XML簡單應用程序接口。與DOM不同，SAX提供的訪問模式是一種順序模式，這是一種快速讀寫XML數據的方式。當使用SAX分析器對XML文檔進行分析時，會觸發一系列事件，并激活相應的事件處理函數，應用程序通過這些事件處理函數實現對XML文檔的訪問，因而SAX接口也被稱作事件驅動接口。

1. importjava.io.File;
3. importjavax.xml.parsers.SAXParser;
4. importjavax.xml.parsers.SAXParserFactory;
6. importorg.xml.sax.Attributes;
7. importorg.xml.sax.SAXException;
8. importorg.xml.sax.helpers.DefaultHandler;
10. publicclassSaxTest1
11. {
12. publicstaticvoidmain(String[]args)throwsException
13. {
14. //step1：獲得SAX解析器工廠實例
15. SAXParserFactoryfactory=SAXParserFactory.newInstance();
17. //step2:獲得SAX解析器實例
18. SAXParserparser=factory.newSAXParser();
20. //step3:開始進行解析
21. parser.parse(newFile("student.xml"),newMyHandler());
23. }
24. }
26. classMyHandlerextendsDefaultHandler
27. {
28. @Override
29. publicvoidstartDocument()throwsSAXException
30. {
31. System.out.println("parsebegan");
32. }
34. @Override
35. publicvoidendDocument()throwsSAXException
36. {
37. System.out.println("parsefinished");
38. }
40. @Override
41. publicvoidstartElement(Stringuri,StringlocalName,StringqName,
42. Attributesattributes)throwsSAXException
43. {
44. System.out.println("startelement");
45. }
47. @Override
48. publicvoidendElement(Stringuri,StringlocalName,StringqName)
49. throwsSAXException
50. {
51. System.out.println("finishelement");
52. }
53. }

1. importjava.io.File;
2. importjava.util.Stack;
4. importjavax.xml.parsers.SAXParser;
5. importjavax.xml.parsers.SAXParserFactory;
7. importorg.xml.sax.Attributes;
8. importorg.xml.sax.SAXException;
9. importorg.xml.sax.helpers.DefaultHandler;
11. publicclassSaxTest2
12. {
13. publicstaticvoidmain(String[]args)throwsException
14. {
15. SAXParserFactoryfactory=SAXParserFactory.newInstance();
17. SAXParserparser=factory.newSAXParser();
19. parser.parse(newFile("student.xml"),newMyHandler2());
20. }
21. }
23. classMyHandler2extendsDefaultHandler
24. {
25. privateStack<String>stack=newStack<String>();
27. privateStringname;
29. privateStringgender;
31. privateStringage;
33. @Override
34. publicvoidstartElement(Stringuri,StringlocalName,StringqName,
35. Attributesattributes)throwsSAXException
36. {
37. stack.push(qName);
39. for(inti=0;i<attributes.getLength();i++)
40. {
41. StringattrName=attributes.getQName(i);
42. StringattrValue=attributes.getValue(i);
44. System.out.println(attrName+"="+attrValue);
45. }
46. }
48. @Override
49. publicvoidcharacters(char[]ch,intstart,intlength)
50. throwsSAXException
51. {
52. Stringtag=stack.peek();
54. if("姓名".equals(tag))
55. {
56. name=newString(ch,start,length);
57. }
58. elseif("性別".equals(tag))
59. {
60. gender=newString(ch,start,length);
61. }
62. elseif("年齡".equals(tag))
63. {
64. age=newString(ch,start,length);
65. }
66. }
68. @Override
69. publicvoidendElement(Stringuri,StringlocalName,StringqName)
70. throwsSAXException
71. {
72. stack.pop();//表示該元素已經解析完畢，需要從棧中彈出
74. if("學生".equals(qName))
75. {
76. System.out.println("姓名："+name);
77. System.out.println("性別："+gender);
78. System.out.println("年齡："+age);
80. System.out.println();
81. }
83. }
84. }

JDOM:

JDOM是一個開源項目，它基于樹型結構，利用純JAVA的技術對XML文檔實現解析、生成、序列化以及多種操作。（http://jdom.org）

•JDOM 直接為JAVA編程服務。它利用更為強有力的JAVA語言的諸多特性（方法重載、集合概念等），把SAX和DOM的功能有效地結合起來。

•JDOM是用Java語言讀、寫、操作XML的新API函數。在直接、簡單和高效的前提下，這些API函數被最大限度的優化。

jdom創建xml

1. importjava.io.FileWriter;
3. importorg.jdom.Attribute;
4. importorg.jdom.Comment;
5. importorg.jdom.Document;
6. importorg.jdom.Element;
7. importorg.jdom.output.Format;
8. importorg.jdom.output.XMLOutputter;
10. publicclassJDomTest1
11. {
12. publicstaticvoidmain(String[]args)throwsException
13. {
14. Documentdocument=newDocument();
16. Elementroot=newElement("root");
18. document.addContent(root);
20. Commentcomment=newComment("Thisismycomments");
22. root.addContent(comment);
24. Elemente=newElement("hello");
26. e.setAttribute("sohu","www.sohu.com");
28. root.addContent(e);
30. Elemente2=newElement("world");
32. Attributeattr=newAttribute("test","hehe");
34. e2.setAttribute(attr);
36. e.addContent(e2);
38. e2.addContent(newElement("aaa").setAttribute("a","b")
39. .setAttribute("x","y").setAttribute("gg","hh").setText("textcontent"));
42. Formatformat=Format.getPrettyFormat();
44. format.setIndent("");
45. //format.setEncoding("gbk");
47. XMLOutputterout=newXMLOutputter(format);
49. out.output(document,newFileWriter("jdom.xml"));
51. }
52. }

JDOM解析xml

1. importjava.io.File;
2. importjava.io.FileOutputStream;
3. importjava.util.List;
5. importorg.jdom.Attribute;
6. importorg.jdom.Document;
7. importorg.jdom.Element;
8. importorg.jdom.input.SAXBuilder;
9. importorg.jdom.output.Format;
10. importorg.jdom.output.XMLOutputter;
12. publicclassJDomTest2
13. {
14. publicstaticvoidmain(String[]args)throwsException
15. {
16. SAXBuilderbuilder=newSAXBuilder();
18. Documentdoc=builder.build(newFile("jdom.xml"));
20. Elementelement=doc.getRootElement();
22. System.out.println(element.getName());
24. Elementhello=element.getChild("hello");
26. System.out.println(hello.getText());
28. Listlist=hello.getAttributes();
30. for(inti=0;i<list.size();i++)
31. {
32. Attributeattr=(Attribute)list.get(i);
34. StringattrName=attr.getName();
35. StringattrValue=attr.getValue();
37. System.out.println(attrName+"="+attrValue);
38. }
40. hello.removeChild("world");
42. XMLOutputterout=newXMLOutputter(Format.getPrettyFormat().setIndent(""));
45. out.output(doc,newFileOutputStream("jdom2.xml"));
47. }
48. }

Dom4j

1. importjava.io.FileOutputStream;
2. importjava.io.FileWriter;
4. importorg.dom4j.Document;
5. importorg.dom4j.DocumentHelper;
6. importorg.dom4j.Element;
7. importorg.dom4j.io.OutputFormat;
8. importorg.dom4j.io.XMLWriter;
10. publicclassTest1
11. {
12. publicstaticvoidmain(String[]args)throwsException
13. {
14. //創建文檔并設置文檔的根元素節點：第一種方式
15. //Documentdocument=DocumentHelper.createDocument();
16. //
17. //Elementroot=DocumentHelper.createElement("student");
18. //
19. //document.setRootElement(root);
21. //創建文檔并設置文檔的根元素節點：第二種方式
22. Elementroot=DocumentHelper.createElement("student");
23. Documentdocument=DocumentHelper.createDocument(root);
25. root.addAttribute("name","zhangsan");
27. ElementhelloElement=root.addElement("hello");
28. ElementworldElement=root.addElement("world");
30. helloElement.setText("hello");
31. worldElement.setText("world");
33. helloElement.addAttribute("age","20");
35. XMLWriterxmlWriter=newXMLWriter();
36. xmlWriter.write(document);
38. OutputFormatformat=newOutputFormat("",true);
40. XMLWriterxmlWriter2=newXMLWriter(newFileOutputStream("student2.xml"),format);
41. xmlWriter2.write(document);
43. XMLWriterxmlWriter3=newXMLWriter(newFileWriter("student3.xml"),format);
45. xmlWriter3.write(document);
46. xmlWriter3.close();
48. }
49. }

1. importjava.io.File;
2. importjava.util.Iterator;
3. importjava.util.List;
5. importjavax.xml.parsers.DocumentBuilder;
6. importjavax.xml.parsers.DocumentBuilderFactory;
8. importorg.dom4j.Document;
9. importorg.dom4j.Element;
10. importorg.dom4j.io.DOMReader;
11. importorg.dom4j.io.SAXReader;
13. publicclassTest2
14. {
15. publicstaticvoidmain(String[]args)throwsException
16. {
17. SAXReadersaxReader=newSAXReader();
19. Documentdoc=saxReader.read(newFile("student2.xml"));
21. Elementroot=doc.getRootElement();
23. System.out.println("rootelement:"+root.getName());
25. ListchildList=root.elements();
27. System.out.println(childList.size());
29. ListchildList2=root.elements("hello");
31. System.out.println(childList2.size());
33. Elementfirst=root.element("hello");
35. System.out.println(first.attributeValue("age"));
37. for(Iteratoriter=root.elementIterator();iter.hasNext();)
38. {
39. Elemente=(Element)iter.next();
41. System.out.println(e.attributeValue("age"));
42. }
44. System.out.println("---------------------------");
46. DocumentBuilderFactorydbf=DocumentBuilderFactory.newInstance();
47. DocumentBuilderdb=dbf.newDocumentBuilder();
48. org.w3c.dom.Documentdocument=db.parse(newFile("student2.xml"));
50. DOMReaderdomReader=newDOMReader();
52. //將JAXP的Document轉換為dom4j的Document
53. Documentd=domReader.read(document);
55. ElementrootElement=d.getRootElement();
57. System.out.println(rootElement.getName());
59. }
60. }

1. importjava.io.FileWriter;
3. importorg.jdom.Attribute;
4. importorg.jdom.Document;
5. importorg.jdom.Element;
6. importorg.jdom.output.Format;
7. importorg.jdom.output.XMLOutputter;
9. publicclassTest3
10. {
11. publicstaticvoidmain(String[]args)throwsException
12. {
13. Documentdocument=newDocument();
15. Elementroot=newElement("聯系人列表").setAttribute(newAttribute("公司",
16. "A集團"));
18. document.addContent(root);
20. ElementcontactPerson=newElement("聯系人");
22. root.addContent(contactPerson);
24. contactPerson
25. .addContent(newElement("姓名").setText("張三"))
26. .addContent(newElement("公司").setText("A公司"))
27. .addContent(newElement("電話").setText("021-55556666"))
28. .addContent(
29. newElement("地址")
30. .addContent(newElement("街道").setText("5街"))
31. .addContent(newElement("城市").setText("上海"))
32. .addContent(newElement("省份").setText("上海市")));
34. XMLOutputteroutput=newXMLOutputter(Format.getPrettyFormat()
35. .setIndent("").setEncoding("gbk"));
37. output.output(document,newFileWriter("contact.xml"));
39. }
40. }