使用Dom4j修改XML文件

代码如下：

需要使用的jar包除了dom4j的jar包之外，还需要jar包：jaxen-1.1-beta-6.jar

 1 package xml;

 2 

 3 import org.dom4j.Document;

 4 import org.dom4j.Element;

 5 import org.dom4j.Attribute;

 6 import java.util.List;

 7 import java.util.Iterator;

 8 import org.dom4j.io.XMLWriter;

 9 import java.io.*;

10 import org.dom4j.DocumentException;

11 import org.dom4j.io.SAXReader;

12 

13 public class Dom4jModifyXml {

14     public void modifyDocument(File inputXml) {

15         try {

16             //使用 SAXReader 解析 XML 文档

17             SAXReader saxReader = new SAXReader();

18             Document document = saxReader.read(inputXml);

19             

20             //使用 XPath 表达式从 article 元素中获得 level 节点列表。

21             //如果 level 属性值是Intermediate则改为Introductory。

22             //定位节点需要使用jar包：jaxen-1.1-beta-6.jar

23             List list = document.selectNodes("//article/@level");  

24             Iterator iter = list.iterator();

25             while (iter.hasNext()) {

26                 Attribute attribute = (Attribute) iter.next();

27                 if (attribute.getValue().equals("Intermediate"))

28                     attribute.setValue("Introductory");

29             }

30 

31             //修改日期

32             list = document.selectNodes("//article/@date");

33             iter = list.iterator();

34             while (iter.hasNext()) {

35                 Attribute attribute = (Attribute) iter.next();

36                 if (attribute.getValue().equals("December-2001"))

37                     attribute.setValue("October-2002");

38             }

39             

40             //获取 article 元素列表，从 article 元素中的 title 元素得到一个迭代器，并修改 title 元素的文本。

41             list = document.selectNodes("//article");

42             iter = list.iterator();

43             while (iter.hasNext()) {

44                 Element element = (Element) iter.next();

45                 Iterator iterator = element.elementIterator("title");

46                 while (iterator.hasNext()) {

47                     Element titleElement = (Element) iterator.next();

48                     if (titleElement.getText().equals("Java configuration with XML Schema"))

49                         titleElement.setText("Create flexible and extensible XML schema");

50                 }

51             }

52             

53             //修改作者的姓

54             list = document.selectNodes("//article/author");

55             iter = list.iterator();

56             while (iter.hasNext()) {

57                 Element element = (Element) iter.next();

58                 Iterator iterator = element.elementIterator("firstname");

59                 while (iterator.hasNext()) {

60                     Element firstNameElement = (Element) iterator.next();

61                     if (firstNameElement.getText().equals("Marcello"))

62                         firstNameElement.setText("Ayesha");

63                 }

64             }

65             

66             //修改作者的名字

67             list = document.selectNodes("//article/author");

68             iter = list.iterator();

69             while (iter.hasNext()) {

70                 Element element = (Element) iter.next();

71                 Iterator iterator = element.elementIterator("lastname");

72                 while (iterator.hasNext()) {

73                     Element lastNameElement = (Element) iterator.next();

74                     if (lastNameElement.getText().equals("Vitaletti"))

75                         lastNameElement.setText("Malik");

76                 }

77             }

78             

79             //将修改后的文档流写入新的xml文件中

80             XMLWriter output = new XMLWriter(new FileWriter(new File("E:/xml/catalog-modify.xml")));

81             output.write(document);

82             output.close();

83         }

84 

85         catch (DocumentException e) {

86             System.out.println(e.getMessage());

87         } catch (IOException e) {

88             System.out.println(e.getMessage());

89         }

90     }

91 

92     public static void main(String[] argv) {

93         Dom4jModifyXml dom4jModifyXml = new Dom4jModifyXml();

94         dom4jModifyXml.modifyDocument(new File("E:/xml/catalog.xml"));

95     }

96 }

原来的catalog.xml文件:

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

 2 <catalog> 

 3 <!--An XML Catalog--> 

 4 <?target instruction?>

 5 <journal title="XML Zone" publisher="IBM developerWorks"> 

 6   <article level="Intermediate" date="December-2001">

 7     <title>Java configuration with XML Schema</title> 

 8     <author> 

 9       <firstname>Marcello</firstname> 

10       <lastname>Vitaletti</lastname> 

11     </author>

12   </article>

13  </journal> 

14 </catalog>

修改后的catalog-modify.xml文件

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

 2 <catalog> 

 3 <!--An XML Catalog--> 

 4 <?target instruction?>

 5 <journal title="XML Zone" publisher="IBM developerWorks"> 

 6   <article level="Introductory" date="October-2002">

 7     <title>Create flexible and extensible XML schema</title> 

 8     <author> 

 9       <firstname>Ayesha</firstname> 

10       <lastname>Malik</lastname> 

11     </author>

12   </article>

13  </journal> 

14 </catalog>