dom4j解析xml实例

dom4j是一个java的XML API，类似jdom，用来读写XML文件，它性能优异、功能强大和极易使用等特点

所用jar包：dom4j-1.6.1.jar

需要解析的xml文件：people.xml

1. <people city="shenzhen">
2. <student name="milton" age="22"></student>
3. <student name="lego" age="23"></student>
4. <teacher name="bruce" age="27"></teacher>
5. <teacher name="ziven" age="28"></teacher>
6. </people>

首先根据xml文档构建javabean

People.java

Student.java

Teacher.java

解析代码：

1. package com.test.xml;
2. import java.io.File;
3. import java.net.URISyntaxException;
4. import java.util.ArrayList;
5. import java.util.Iterator;
6. import java.util.List;
7. import org.dom4j.Document;
8. import org.dom4j.DocumentException;
9. import org.dom4j.Element;
10. import org.dom4j.io.SAXReader;
11. import com.test.xml.element.People;
12. import com.test.xml.element.Student;
13. import com.test.xml.element.Teacher;
14. public class XmlParser {
15. @SuppressWarnings("unchecked")
16. public static People parseXml(String xmlPath){
17. File xmlFile = new File(xmlPath);
18. System.out.println(xmlFile.getPath());
19. if(xmlFile.exists()){
20. SAXReader reader = new SAXReader();
21. People people = new People();
22. try {
23. //读入文档流
24. Document document = reader.read(xmlFile);
25. //获取根节点
26. Element root = document.getRootElement();
27. List<Student> students = new ArrayList<Student>();
28. List<Teacher> teachers = new ArrayList<Teacher>();
29. people.setCity(root.attributeValue("city"));
30. //解析student节点
31. for(Iterator iterator = root.elementIterator("student");iterator.hasNext();){
32. Element eStudent = (Element) iterator.next();
33. Student student = new Student(eStudent.attributeValue("name"), Integer.parseInt(eStudent.attributeValue("age")));
34. students.add(student);
35. }
36. //解析teacher节点
37. for(Iterator iterator = root.elementIterator("teacher");iterator.hasNext();){
38. Element eTeacher = (Element) iterator.next();
39. Teacher teacher = new Teacher(eTeacher.attributeValue("name"), Integer.parseInt(eTeacher.attributeValue("age")));
40. teachers.add(teacher);
41. }
42. people.setStudent(students);
43. people.setTeacher(teachers);
44. System.out.println("parse success!");
45. } catch (DocumentException e) {
46. e.printStackTrace();
47. }
48. return people;
49. }else{
50. System.out.println("file is not exist!");
51. return null;
52. }
53. }
54. public static void main(String[] args) throws URISyntaxException{
55. String xmlPath = "";
56. xmlPath = "D:/Program Files/eclipse-jee/workspace/TEST/src/com/test/xml/people.xml";
57. System.out.println("file full path is "+xmlPath);
58. //解析people.xml
59. People p = parseXml(xmlPath);
60. //处理解析结果
61. System.out.println(p.getCity());
62. List<Student> sList = p.getStudent();
63. List<Teacher> tList = p.getTeacher();
64. for(Student s:sList){
65. System.out.println(s.getName()+"--"+s.getAge());
66. }
67. for(Teacher t:tList){
68. System.out.println();
69. }
70. }
71. }

1. 运行结果：

1. parse success!
2. shenzhen
3. milton--22
4. lego--23