import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;


public class XmlTest {
    /**
     * @author butnet
     * @param args
     * @throws DocumentException 
     */
    public static void main(String[] args) throws DocumentException {
        Document doc = DocumentHelper.parseText("<user><name>butnet</name><web>http://jvmer.com</web></user>");
        Element user = doc.getRootElement();
        Element name = user.element("name");
        Element web = user.element("web");
        
        System.out.println(name.getText());
        System.out.println(web.getText());
    }
}

/*使用DOM4J可以很方便的对XML进行读写, 项目地址  http://dom4j.sourceforge.net/  */

------解决方案--------------------
	package com.anxin.dod;

	import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;

	import org.dom4j.Document;
	import org.dom4j.DocumentException;
	import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
	import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import com.anxin.beans.*;

	public class Login {
		public static String saveXmlFilePath;
		T_yonghu c=new T_yonghu();
		//SAXReader reader=new SAXReader();//构建sax读取对象
		List<T_yonghu> list = new ArrayList<T_yonghu>();
		
		
		public  T_yonghu readXML(String yhmc,String yhma,String path) throws IOException{
			
			Document doc=(Document) Login.getXmlDocument(path);
			Element ele=doc.getRootElement();

			List eles=ele.elements("用户");

				//System.out.println("根节点:"+ele.getName());
				//Iterator it=root.elementIterator();//获取根节点下面的所有子节点
			
				for(Iterator childs=eles.iterator();childs.hasNext();){

				     Element el = (Element)childs.next();
				     //System.out.println("yonghu:"+el.getText());
				    // System.out.println("yonghu:"+el.attributeValue("用户密码"));
					if(yhmc.equals(el.getText()) && yhma.equals(el.attributeValue("用户密码")))
				
					{   c.setYhmc(el.getText());
					//c.setYhma(el.element("用户名称").attributeValue("用户密码"));
						c.setYhsf(el.attributeValue("用户身份"));
						c.setId(el.attributeValue("id"));
					//list.add(c);
					}

		}
				return c;
		}
		

		public static Document getXmlDocument(String saveXmlFilePath){

		setSaveXmlFilePath(saveXmlFilePath);

		 SAXReader reader = new SAXReader();

		 Document doc = null;

		try {

		doc = reader.read(new File(saveXmlFilePath));

		}finally{

		return doc;

		}

		}

		

		public static void saveDocument(Document doc) throws IOException{

		 OutputFormat format = OutputFormat.createPrettyPrint();

		 XMLWriter writer = new XMLWriter(new FileOutputStream(saveXmlFilePath),format);

		 writer.write(doc);

		 writer.close();

		}
		
		
		public static String getSaveXmlFilePath() {

			return saveXmlFilePath;

			}

			  

			public static void setSaveXmlFilePath(String saveXmlFilePath) {