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

<people city="shenzhen">
    <student name="milton" age="22"></student>
    <student name="lego" age="23"></student>
    <teacher name="bruce" age="27"></teacher>
    <teacher name="ziven" age="28"></teacher>
</people>

首先根据xml文档构建javabean

People.java

Student.java

Teacher.java

 解析代码：

package com.test.xml;

import java.io.File;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.test.xml.element.People;
import com.test.xml.element.Student;
import com.test.xml.element.Teacher;

public class XmlParser {
    @SuppressWarnings("unchecked")
    public static People parseXml(String xmlPath){
        File xmlFile = new File(xmlPath);
        System.out.println(xmlFile.getPath());
        if(xmlFile.exists()){
            SAXReader reader = new SAXReader();
            People people = new People();
            try {
                //读入文档流
                Document document = reader.read(xmlFile);
                //获取根节点
                Element root = document.getRootElement();

                List<Student> students = new ArrayList<Student>();
                List<Teacher> teachers = new ArrayList<Teacher>();
                people.setCity(root.attributeValue("city"));
                //解析student节点
                for(Iterator iterator = root.elementIterator("student");iterator.hasNext();){
                    Element eStudent = (Element) iterator.next();
                    Student student = new Student(eStudent.attributeValue("name"), Integer.parseInt(eStudent.attributeValue("age")));
                    students.add(student);
                }
                //解析teacher节点
                for(Iterator iterator = root.elementIterator("teacher");iterator.hasNext();){
                    Element eTeacher = (Element) iterator.next();
                    Teacher teacher = new Teacher(eTeacher.attributeValue("name"), Integer.parseInt(eTeacher.attributeValue("age")));
                    teachers.add(teacher);
                }
                people.setStudent(students);
                people.setTeacher(teachers);
                System.out.println("parse success!");
            } catch (DocumentException e) {
                e.printStackTrace();
            }
            return people;
        }else{
            System.out.println("file is not exist!");
            return null;
        }
    }

    public static void main(String[] args) throws URISyntaxException{
        String xmlPath = "";
        xmlPath = "D:/Program Files/eclipse-jee/workspace/TEST/src/com/test/xml/people.xml";
        System.out.println("file full path is "+xmlPath);
        //解析people.xml
        People p = parseXml(xmlPath);

        //处理解析结果
        System.out.println(p.getCity());
        List<Student> sList = p.getStudent();
        List<Teacher> tList = p.getTeacher();
        for(Student s:sList){
            System.out.println(s.getName()+"--"+s.getAge());
        }
        for(Teacher t:tList){
            System.out.println();
        }
    }
}

运行结果：

parse success!
shenzhen
milton--22
lego--23