//这是第二种开发servlet的方法（继承GernericServlet)

package com.tsinghua;

import javax.servlet.GenericServlet;

import javax.servlet.*;

import java.io.*;

public class HelloGen extends GenericServlet{

    //重写service方法即可

    public void service(ServletRequest req, ServletResponse res)

    {

        //返回Hello,world!gerneric

        try{

            PrintWriter pw = res.getWriter();

            pw.println("Hello,world!gerneric");

        }

        catch(Exception ex)

        {

            ex.printStackTrace();

        }

    }

}