【Servlet学习】继承HttpServlet简单示例

package com.sprying;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *第三种方法开发servlet
 *通过继承HttpServlet,
 */
public class HttpExample extends HttpServlet
{
     /**
     * 
*/
    private static final long serialVersionUID = 1L;
    public void doGet(HttpServletRequest req,HttpServletResponse res)
     {
         this.doPost(req,res);
     }
     public void doPost(HttpServletRequest req,HttpServletResponse res)
     {
         try
         {
             PrintWriter pw=res.getWriter();
             pw.print("HelloWorld,extends of HttpServlet");
         }catch(IOException e)
         {
             e.printStackTrace();
         }
     }
}