package com.itnba.maya.servlet;

import java.io.IOException;

import javax.servlet.*;//导入包

import javax.servlet.http.*;//导入包

public class TestServlet extends HttpServlet{//类的派生

    public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{//重写方法

        String s=request.getParameter("id");

        response.getWriter().write("this is first servlet"+"\t"+s);

    }

    public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{//重写方法

        doGet(request, response);

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee

                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

  version="3.1">

    <servlet>

        <servlet-name>first</servlet-name>

        <servlet-class>com.itnba.maya.servlet.TestServlet</servlet-class>

    </servlet>

    <servlet-mapping>//映射servlet

        <servlet-name>first</servlet-name>

        <url-pattern>/ttt</url-pattern>

    </servlet-mapping>

    <welcome-file-list>

        <welcome-file>index.html</welcome-file>

        <welcome-file>index.htm</welcome-file>

        <welcome-file>index.jsp</welcome-file>

        <welcome-file>default.html</welcome-file>

        <welcome-file>default.htm</welcome-file>

        <welcome-file>default.jsp</welcome-file>

    </welcome-file-list>

</web-app>