java创建servlet的三种方法

一，实现Servlet接口

package com.wl.test;

import java.io.IOException;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class Test implements Servlet{

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	public ServletConfig getServletConfig() {
		// TODO Auto-generated method stub
		return null;
	}


	public void init(ServletConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	public void service(ServletRequest arg0, ServletResponse arg1)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		
	}

	public String getServletInfo() {
		// TODO Auto-generated method stub
		return null;
	}
	
}

 二，继承GenericServlet类

package com.wl.test;

import java.io.IOException;

import javax.servlet.GenericServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class Test extends GenericServlet{

	@Override
	public void service(ServletRequest arg0, ServletResponse arg1)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		
	}
	
}

 三，继承HttpServlet类

package com.wl.test;

import java.io.IOException;

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

public class Test extends HttpServlet{
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
	}
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		this.doGet(req, resp);
	}
}