<?xml version="1.0" encoding="utf-8"?>

<students>

    <student>

        <name>张三</name>

        <age>20</age>

        <school>北京大学</school>

    </student>

    <student>

        <name>李四</name>

        <age>18</age>

        <school>清华大学</school>

    </student>

</students>

package d20160624;

public class Student {

    private String name;

    private String age;

    private String school;

    public Student() {

    }

    public Student(String name, String age, String school) {

        this.name = name;

        this.age = age;

        this.school = school;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getAge() {

        return age;

    }

    public void setAge(String age) {

        this.age = age;

    }

    public String getSchool() {

        return school;

    }

    public void setSchool(String school) {

        this.school = school;

    }

    //打印学生信息

    public void showInfo(){

        System.out.println("姓名："+this.name+"\n年纪："+this.age+"\n学校："+this.school);

        System.out.println("***********");

    }

}

 package d20160624;

 import java.io.File;

 import java.io.IOException;

 import javax.xml.parsers.DocumentBuilder;

 import javax.xml.parsers.DocumentBuilderFactory;

 import javax.xml.parsers.ParserConfigurationException;

 import org.w3c.dom.Document;

 import org.w3c.dom.Element;

 import org.w3c.dom.NodeList;

 import org.xml.sax.SAXException;

 /*

  * 使用DOM解析student.xml，输出打印学生信息

  */

 public class DomParseStudent {

     private Document document;

     private String name,age,school;

     //    生成dom树

     public void getDom(File file){

 //        创建解析器工厂

         DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();

         try {

 //            创建解析器对象

             DocumentBuilder db=dbf.newDocumentBuilder();

 //            解析XML文件得到DOM树

             this.document=db.parse(file);

         } catch (ParserConfigurationException e) {

             e.printStackTrace();

         } catch (SAXException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

 //    解析XML

     public void showEle(){

         DomParseStudent dps=new DomParseStudent();

         NodeList students=document.getElementsByTagName("student");

         for(int i=0;i<students.getLength();i++){

             Element student=(Element) students.item(i);

             NodeList names=student.getElementsByTagName("name");

             for(int j=0;j<names.getLength();j++){

                 Element name=(Element) names.item(j);

                 this.name=name.getTextContent();

             }

             NodeList ages=student.getElementsByTagName("age");

             for(int k=0;k<ages.getLength();k++){

                 Element age=(Element) ages.item(k);

                 this.age=age.getTextContent();

             }

             NodeList schools=student.getElementsByTagName("school");

             for(int p=0;p<schools.getLength();p++){

                 Element school=(Element) schools.item(p);

                 this.school=school.getTextContent();

             }

             Student stu=new Student(name, age, school);

             stu.showInfo();

         }

     }

     public static void main(String[] args){

         DomParseStudent dps=new DomParseStudent();

         File file=new File("D:\\Java_study\\workspace\\myeclipse\\HomeWork\\src\\d20160624\\student.xml");

         dps.getDom(file);

         dps.showEle();

     }

 }

 package d20160624;

 import java.io.File;

 import java.util.Iterator;

 import java.util.List;

 import org.dom4j.io.SAXReader;

 import org.dom4j.Document;

 import org.dom4j.DocumentException;

 import org.dom4j.Element;

 /*

  * 使用dom4j解析student.xml，输出打印学生信息

  */

 public class Dom4jStudent {

     private Document document;

     private String name,age,school;

 //    生成dom树

     public void getDom(File file){

 //        创建SAXReader

         SAXReader sax=new SAXReader();

         try {

 //            读取xml文件,生成dom树

             this.document=sax.read(file);

         } catch (DocumentException e) {

             e.printStackTrace();

         }

     }

 //    读取XML文件

     public void showXML(){

         Element root=document.getRootElement();

         List<Element> student=root.elements();

         for(Iterator<Element> stuit=student.iterator();stuit.hasNext();){

             Element stu=stuit.next();

             List<Element> names=stu.elements("name");

             for(Iterator<Element> name=names.iterator();name.hasNext();){

                 Element nameel=name.next();

                 this.name=nameel.getText();

             }

             List<Element> ages=stu.elements("age");

             for(Iterator<Element> age=ages.iterator();age.hasNext();){

                 Element ageel=age.next();

                 this.age=ageel.getText();

             }

             List<Element> schools=stu.elements("school");

             for(Iterator<Element> school=schools.iterator();school.hasNext();){

                 Element schoolel=school.next();

                 this.school=schoolel.getText();

             }

             Student stu1=new Student(name, age, school);

             stu1.showInfo();

         }

     }

     public static void main(String[] args){

         Dom4jStudent d4j=new Dom4jStudent();

         File file=new File("D:\\Java_study\\workspace\\myeclipse\\HomeWork\\src\\d20160624\\student.xml");

         d4j.getDom(file);

         d4j.showXML();

     }

 }