Javaweb中使用Jdom解析xml的方法

package com.book.jdom;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;
//生成xml文件
public class CreateJdom {
public static void main(String[] args) {
//定义元素
Element people,student;
people = new Element("people");
student = new Element("student");
//设置属性
student.setAttribute("name", "张三");
student.setAttribute("salary","8000");
//设置文本
student.setText("呵呵");
//将其添加到根目录下
people.addContent(student);
//新建一个文档。
Document doc = new Document(people);
//读取格式，赋值给当前的Format
Format format = Format.getCompactFormat();
//对当前格式进行初始化
format.setEncoding("UTF-8");
//设置xml文件缩进4个空格
format.setIndent(" ");
//建一个xml输出工厂，将格式给工厂
XMLOutputter xmlout = new XMLOutputter(format);
try {
//将其写好的文本给工厂，并且建一个文件输出流，将数据输出
xmlout.output(doc, new FileOutputStream("people.xml"));
System.out.println("成功！");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/*运行结果:
<?xml version="1.0" encoding="UTF-8"?>
<people>
<student name="张三" salary="8000" />
</people>
* */

package com.book.jdom;
import java.io.IOException;
import java.util.List;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
//读取people.xml文档
public class Readxml {
public static void main(String[] args) {
//新建构造器解析xml
SAXBuilder sax = new SAXBuilder();
//建一个文档去接受数据
Document doc;
try {
//获取people.xml文档
doc = sax.build("people.xml");
//获得根节点
Element people = doc.getRootElement();
//获得根节点下的节点数据
List<Element> list = people.getChildren();
for(int i = 0;i<list.size();i++){
Element e = list.get(i);
//获得属性值
System.out.println("name："+e.getAttributeValue("name")+" salary："+e.getAttributeValue("salary"));
//获得文本值
System.out.println(e.getText());
}
} catch (JDOMException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
* 运行结果：
* name：张三 salary：8000
呵呵
* */

用jdom获取多个相同标签名的不同属性值的方法
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Key Name="China">
      <Value Name="TextKey">China</Value>
      <Value Name="Enabled">true</Value>
      <Value Name="PhotoIDWidth">38PhotoIDWidth</Value>
      <Value Name="PhotoIDHeight">38</Value>
      <Key Name="Adult">
        <Value Name="CrownPercent">0.10</Value>
        <Value Name="HeadPercent">0.60AdultHeadPercent</Value>
      </Key>
      <Key Name="Child">
        <Value Name="CrownPercent">0.10</Value>
        <Value Name="HeadPercent">0.60ChildHeadPercent</Value>
      </Key>
    </Key>
    <Key Name="Australia">
      <Value Name="TextKey">Australia</Value>
      <Value Name="Enabled">true</Value>
      <Value Name="PhotoIDWidth">35PhotoIDWidth</Value>
      <Value Name="PhotoIDHeight">45</Value>
      <Key Name="Adult">
        <Value Name="CrownPercent">0.061</Value>
        <Value Name="HeadPercent">0.756"Adult"HeadPercent</Value>
      </Key>
      <Key Name="Child">
        <Value Name="CrownPercent">0.072</Value>
        <Value Name="HeadPercent">0.711ChildHeadPercent</Value>
      </Key>
    </Key>
    <Key Name="Austria">
      <Value Name="TextKey">Austria</Value>
      <Value Name="Enabled">true</Value>
      <Value Name="PhotoIDWidth">35PhotoIDWidth</Value>
      <Value Name="PhotoIDHeight">45</Value>
      <Key Name="Adult">
        <Value Name="CrownPercent">0.064</Value>
        <Value Name="HeadPercent">0.744AdultHeadPercent</Value>
      </Key>
      <Key Name="Child">
        <Value Name="CrownPercent">0.078</Value>
        <Value Name="HeadPercent">0.689ChildHeadPercent</Value>
      </Key>
    </Key>
</Configuration>
package input;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
public class ReadXML {
  /**
   * @param args
   */
  public static void main(String[] args) throws JDOMException, IOException {
    SAXBuilder sb = new SAXBuilder();
    //构造文档对象
    Document doc = sb.build(Test.class.getClassLoader().getResourceAsStream("nation.xml"));
    //获取根元素
    Element root = doc.getRootElement();
    //定位到<Configuration> -> <Key>
    List<Element> list = root.getChildren("Key");
    List<Element> children = new ArrayList<Element>();
    List<Element> childrens = new ArrayList<Element>();
    for (int i = 0; i < list.size(); i++) {
      Element element = (Element) list.get(i);
      System.out.print(element.getAttributeValue("Name"));
      //定位到<Configuration> -> <Key> -> <Value>
      children = element.getChildren("Value"); 
      for(int j=0; j<children.size(); j++){
        Element elementChildren = (Element) children.get(j);
        //定位到<Configuration> -> <Key> -> <Value Name="PhotoIDWidth">
        if(elementChildren.getAttributeValue("Name").equals("PhotoIDWidth")){
          //获取<Configuration> -> <Key> -> <Value Name="PhotoIDWidth"> 属性值
          System.out.print("<--------->"+elementChildren.getAttributeValue("Name"));
          //获取<Configuration> -> <Key> -> <Value Name="PhotoIDWidth"> 标签里内容
          System.out.print(","+elementChildren.getText());
        }
      }
      children.clear();
      //定位到<Configuration> -> <Key> -> <Key>
      children = element.getChildren("Key");
      for(int j=0; j<children.size(); j++){
        Element elementChildren = (Element)children.get(j);
        //定位到<Configuration> -> <Key> -> <Key Name="Child">
        if(elementChildren.getAttributeValue("Name").equals("Child")){
          //定位到<Configuration> -> <Key> -> <Key Name="Child"> -> <Value>
          childrens = elementChildren.getChildren("Value");
          for(int k=0; k<childrens.size(); k++){
            Element elementChildrens = (Element)childrens.get(k);
            //定位到<Configuration> -> <Key> -> <Key Name="Child"> -> <Value Name="HeadPercent">
            if(elementChildrens.getAttributeValue("Name").equals("HeadPercent")){
              System.out.println("<--------->"+elementChildrens.getText());
            }
          }
        }
      }
    }
  }
}
打印结果：
China<--------->PhotoIDWidth,38PhotoIDWidth<--------->0.60ChildHeadPercent
Australia<--------->PhotoIDWidth,35PhotoIDWidth<--------->0.711ChildHeadPercent
Austria<--------->PhotoIDWidth,35PhotoIDWidth<--------->0.689ChildHeadPercent