需要引入 dom4j和jaxen 下载地址：http://zzticzh.ys168.com

import org.dom4j.*;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
/**
*
* @author Administrator
*/
public class xmltest {
    
         /** Creates a new instance of xmltest */
         public xmltest() {
         }
         public static void main(String[] args)
         {
      
             try
             {
                 String strXml="<?xml version=\"1.0\" encoding=\"UTF-8\"?><MyXML><Hdr><ReqId>001</ReqId><SeqNo>1002</SeqNo></Hdr></MyXML>";
                 Document document = DocumentHelper.parseText(strXml);
                 String node = document.selectSingleNode("//MyXML/Hdr/ReqId").getText();
                 System.out.println(node);
             }
             catch (Exception e)
             {
                   System.out.print(e.getMessage());
             }
         }    
}