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>