使用JDOM2.0.4 操作/解析xml

<?xml version="1.0" encoding="utf-8"?>
<RETVAL success='true'>
<Shop><sid>1</sid><name>北京鑫和易通贸易有限公司</name></Shop>
<Shop><sid>2</sid><name>张家口市金九福汽车服务有限公司</name></Shop>
</RETVAL>

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.SAXBuilder;
import org.xml.sax.InputSource;

public Class Test{

public static List test() throws Exception{
　　List result = new ArrayList();

　　SAXBuilder builder = new SAXBuilder();
　　StringReader read = new StringReader(xmlDoc);
　　InputSource source = new InputSource(read);
　　Document document = builder.build(source);
　　Element root = document.getRootElement();// 获得根节点
　　String ifSuccess = root.getAttributeValue("success");
　　if (!"true".equals(ifSuccess)) {// 不成功直接返回
　　 throw new Exception("从接口获取全部经销商数据时不成功！");
　　}

　　List<Element> childrenList = root.getChildren();
　　for (Element e : childrenList) {
　　Map elementMap = new HashMap<String, String>();
　　elementMap.put("sid", e.getChildText("sid")); // 经销商id
　　elementMap.put("name", e.getChildText("name")); // 经销商名称

　　result.add(elementMap);
　　}

　　return result;
　　}
}

<?xml version="1.0" encoding="UTF-8"?>
<root>
<person id="1">
<username>张三</username>
<password>123123</password>
</person>
<person id="2">
<username>1111111112</username>
<password>password2</password>
</person>
</root>

Document    build(java.io.File file)       //This builds a document from the supplied filename.
Document    build(org.xml.sax.InputSource in)   //This builds a document from the supplied input source.
Document    build(java.io.InputStream in)    //This builds a document from the supplied input stream.
Document    build(java.io.InputStream in, java.lang.String systemId)   //This builds a document from the supplied input stream.
Document    build(java.io.Reader characterStream)   //This builds a document from the supplied Reader.
Document    build(java.io.Reader characterStream, java.lang.String systemId)  //This builds a document from the supplied Reader.
Document    build(java.lang.String systemId)  //This builds a document from the supplied URI.
Document    build(java.net.URL url)   //This builds a document from the supplied URL.

package test;

import java.io.FileWriter;
import java.util.List;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.SAXBuilder;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;

public class Test {

/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
SAXBuilder builder = new SAXBuilder();
//Document doc = builder.build(new File("src/test.xml"));
//Document doc = builder.build(new FileInputStream("src/test.xml"));
//Document doc = builder.build(new FileReader("src/test.xml"));
//Document doc = builder.build(new URL("http://localhost:8080/jdomTest/test.xml"));
Document doc = builder.build("src/test.xml");

//readXmlFile(doc);
//addXmlElement(doc);
//updateXmlElement(doc);
deleteXmlElement(doc);
}

/**
* 解析xml文件
* @throws Exception
*/
public static void readXmlFile(Document doc) throws Exception {

Element root = doc.getRootElement(); //获取根元素

System.out.println("---获取第一个子节点和子节点下面的节点信息------");
Element e = root.getChild("person"); //获取第一个子元素
System.out.println("person的属性id的值："+e.getAttributeValue("id")); //获取person的属性值
for(Element el: e.getChildren()){
System.out.println(el.getText());//第一次输入张三  第二次输出123123
System.out.println(el.getChildText("username"));//这里这么写会是null
System.out.println(el.getChildText("password"));//这里这么写会是null
}

System.out.println("---直接在根节点下就遍历所有的子节点---");
for(Element el: root.getChildren()){
System.out.println(el.getText());//这里输出4行空格
System.out.println(el.getChildText("username"));//输出张三   & 1111111112
System.out.println(el.getChildText("password"));//输出123123 &  password2
}
}

/**
* 新增节点
* @throws Exception
*/
public static void addXmlElement(Document doc) throws Exception {
Element root = doc.getRootElement(); //获取根元素

Element newEle = new Element("person");//设置新增的person的信息
newEle.setAttribute("id","88888");

Element chiledEle = new Element("username"); //设置username的信息
chiledEle.setText("addUser");
newEle.addContent(chiledEle);

Element chiledEle2 = new Element("password"); //设置password的信息
chiledEle2.setText("addPassword");
newEle.addContent(chiledEle2);

root.addContent(newEle);

XMLOutputter out = new XMLOutputter();
out.setFormat(Format.getCompactFormat().setEncoding("GBK"));//设置UTF-8编码,理论上来说应该不会有乱码，但是出现了乱码,故设置为GBK
out.output(doc, new FileWriter("src/test.xml")); //写文件
}

/**
* 更新节点
* @param doc
* @throws Exception
*/
public static void updateXmlElement(Document doc) throws Exception {
Element root = doc.getRootElement(); //获取根元素

//循环person元素并修改其id属性的值
for(Element el : root.getChildren("person")){
el.setAttribute("id","haha");
}
//循环设置username和password的文本值和添加属性
for(Element el: root.getChildren()){
el.getChild("username").setAttribute("nameVal", "add_val").setText("update_text");
el.getChild("password").setAttribute("passVal", "add_val").setText("update_text");
}

XMLOutputter out = new XMLOutputter();
out.setFormat(Format.getCompactFormat().setEncoding("GBK"));//设置UTF-8编码,理论上来说应该不会有乱码，但是出现了乱码,故设置为GBK
out.output(doc, new FileWriter("src/test.xml")); //写文件
}

/**
* 删除节点和属性
* @param doc
* @throws Exception
*/
public static void deleteXmlElement(Document doc) throws Exception {
Element root = doc.getRootElement(); //获取根元素

List<Element> personList = root.getChildren("person");

//循环person元素,删除person的id为1的id属性以及username子节点
for(Element el : personList){
if(null!=el.getAttribute("id") && "1".equals(el.getAttribute("id").getValue())){
el.removeAttribute("id");
el.removeChild("username");
}
}

//循环person元素,删除person的id为2的节点
for(int i=0; i<personList.size(); i++){
Element el = personList.get(i);
if(null!=el.getAttribute("id") &&  "2".equals(el.getAttribute("id").getValue())){
root.removeContent(el);//从root节点上删除该节点
//警告：此处删除了节点可能会使personList的长度发生变化而发生越界错误,故不能写成for(int i=0,len=personList.size(); i<len; i++)
}
}

XMLOutputter out = new XMLOutputter();
out.setFormat(Format.getCompactFormat().setEncoding("GBK"));//设置UTF-8编码,理论上来说应该不会有乱码，但是出现了乱码,故设置为GBK
out.output(doc, new FileWriter("src/test.xml")); //写文件
}
}