java创建Xml笔记

用java创建Xml的4大类：
 
Element：节点类
Attribute属性类
Document：指的就是文档类
XMLOutput：输出类
此类是用java建立一个xml文件
 
public class TestJdom {
    //创建XML（模型）dom
    public static void main(String[] args) {
       createXmlDom();
    }
    public static void createXmlDom(){
       Element beans=new Element("beans");
       Element bean=new Element("bean");
       Attribute id=new Attribute("id","dataSource");
       Attribute clazz=new Attribute("class","org.apache.commons.dbcp.BasicDataSource");
       bean.setAttribute(id);
       bean.setAttribute(clazz);
       beans.addContent(bean);
      
       Map<String ,String> map=new HashMap<String,String>();
       map.put("driverClassName", "com.mysql.jdbc.Driver");
       map.put("username", "root");
       map.put("password", "root");
       map.put("url", "jdbc:mysql://localhost:3306/test");
      
       for(Map.Entry<String,String> mapEntry:map.entrySet()){
           Element property=new Element("property");
           property.setAttribute("name", mapEntry.getKey());
           Element value=new Element("value");
           value.setText(mapEntry.getValue());
       &nb