student.xml 文件展示：

 <?xml version="1.0" encoding="utf-8" ?>
<person>
   <student id=‘1‘>
        <name>余超</name>
        <sex>男</sex>
        <desc>一个执着而又天真的孩子</desc>
   </student>
     <student id=‘2‘>
        <name>马靖</name>
        <sex>女</sex>
        <desc>一个特别难追求的女孩子</desc>
   </student>
</person>

Student实体类的展示：其作用就是用于临时保存xml文件中的数据到属性中

package net.nyist.xmlparse.domain;

import java.io.Serializable;

/**
 * @author yuchao
 *
 * @school 南阳理工软件学院移动设备应用与开发移动四班
 *
 * @email [email protected]
 *
 * @time 2014年9月30日 下午10:52:47
 */

@SuppressWarnings("serial")
public class Student implements Serializable {

    private int id;
    private String name;
    private String sex;
    private String desc;

    public Student() {
    }

    public Student(int id, String name, String sex, String desc) {
        this.id = id;
        this.name = name;
        this.sex = sex;
        this.desc = desc;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", sex=" + sex
                + ", desc=" + desc + "]";
    }
}

方法一：通过DOM来解析XML文件

package net.nyist.xmlparse.parse.dom;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import net.nyist.xmlparse.domain.Student;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * @author yuchao
 *
 * @school 南阳理工软件学院移动设备应用与开发移动四班
 *
 * @email [email protected]
 *
 * @time 2014年9月30日 下午11:12:57
 */

public class DocumentBuilderFactoryDemo {

    public static void main(String[] args) {
        /** 首先得到：得到 DOM 解析器的工厂实例 */
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory
                .newInstance();
        List<Student> students = new ArrayList<Student>();
        try {
            /** 然后从 DOM 工厂获得 DOM 解析器 */
            DocumentBuilder documentBuilder = documentBuilderFactory
                    .newDocumentBuilder();
            InputStream is = DocumentBuilderFactoryDemo.class.getClassLoader()
                    .getResourceAsStream("student.xml");
            Document document = documentBuilder.parse(is);
            /** 得到 XML 文档的根节点 */
            Element element = document.getDocumentElement();
            NodeList nodeList = element.getElementsByTagName("student");
            Student student = null;
            for (int i = 0; i < nodeList.getLength(); i++) {

                Node node = nodeList.item(i);
                int id = Integer.parseInt(node.getAttributes()
                        .getNamedItem("id").getNodeValue());
                String nameValue = "";
                String sexValue = "";
                String descValue = "";

                if (node.hasChildNodes()) {

                    NodeList childNodes = node.getChildNodes();
                    for (int j = 0; j < childNodes.getLength(); j++) {
                        Node node2 = childNodes.item(j);
                        if ("name".equals(node2.getNodeName())) {
                            nameValue = node2.getFirstChild().getTextContent();
                        } else if ("sex".equals(node2.getNodeName())) {

                            sexValue = node2.getFirstChild().getTextContent();
                        } else if ("desc".equals(node2.getNodeName())) {
                            descValue = node2.getFirstChild().getTextContent();
                        }
                    }
                    student = new Student(id, nameValue, sexValue, descValue);
                    students.add(student);
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        for (int i = 0; students != null && students.size() > 0
                && i < students.size(); i++) {
            System.out.println(students.get(i));
        }
    }
}