Servlet(二)GenericServlet

以GenericServlet创建Servlet

1、在FirstServlet同文件夹下建立GServlet.java

package com.hunhun;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class GServlet extends GenericServlet{

   public void service(ServletRequest req,
             ServletResponse res)
             throws ServletException,
                    IOException{

            res.getWriter().println("GenericServlet "+new Date().toLocaleString());

    }
}

2、web.xml

<?xml version="1.0" encoding="ISO-8859-1"?

>

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
  version="3.0"
  metadata-complete="true">
    <servlet>
        <servlet-name>FirstServlet</servlet-name>
        <servlet-class>com.hunhun.FirstServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>FirstServlet</servlet-name>
        <url-pattern>/FirstServlet</url-pattern>
    </servlet-mapping>

    <servlet>
        <servlet-name>GServlet</servlet-name>
        <servlet-class>com.hunhun.GServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>GServlet</servlet-name>
        <url-pattern>/GServlet</url-pattern>
    </servlet-mapping>

</web-app>

3、编译文件，reload myweb项目，注意每次又一次改动*Servlet.java文件,都须要又一次编译，并又一次载入 myweb项目或重新启动tomcat7

4、浏览器訪问 http://localhost:8080/myweb/GServlet，可看到

GenericServlet 2014-11-14 21:20:39