创建Servlet的三种方式

servlet的三种创建方式：

1、实现servlet接口需要导入的包：

import javax.servlet.Servlet;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import java.io.*;

 

public class one implements Servlet{}

 

2、继承GenericServlet类

需要导入的包：

import java.io.IOException;

import javax.servlet.GenericServlet;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

 

 public class two extends GenericServlet{}

 

3、实现HttpServlet接口

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 three extends HttpServlet{}