servlet基础_1

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编写第一个servlet：

1,src->new->Servlet

2,重写doGet()或者doPost()

3,部署运行

ubuntu上的ServletPractice工程：

web.xml:

<?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>HelloServlet</servlet-name>        <servlet-class>Servlet.HelloServlet</servlet-class></servlet>    <servlet-mapping>        <servlet-name>HelloServlet</servlet-name>        <url-pattern>/Servlet/HelloServlet</url-pattern>    </servlet-mapping></web-app>

index.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html>  <head>    <title></title>  </head>  <body>  <h1>第一个servlet程序</h1>  <hr>  <a href="Servlet/HelloServlet">Get 方式请求HelloServlet</a><br>  <form action="Servlet/HelloServlet" method="post">    <input type="submit" value="Post 方式请求HelloServletv"/>  </form>  </body></html>

HelloServlet.java:

package Servlet;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;/** * Created by jo on 15-7-21. *///继承与HttpServletpublic class HelloServlet extends HttpServlet {    @Override    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        System.out.println("处理Get请求。。。");        PrintWriter out = response.getWriter();        //指定输出文件类型        response.setContentType("text/html;charset=utf-8");        out.println("<strong>Hello Servlet<strong><hr>");    }    @Override    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        System.out.println("处理Post请求。。。");        PrintWriter out = response.getWriter();        //指定输出文件类型        response.setContentType("text/html;charset=utf-8");        out.println("<strong>Hello Servlet<strong><hr>");    }}

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