1.servlet hello实例---HelloServlet

1.用url调用servlet
　　建 web project “HelloServlet”，在src下建包com.amaker.servlet，在包下建HelloServlet.java。
package com.amaker.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//敲doGet alt+/,就会出现原来的方法
 public  class HelloServlet extends HttpServlet {
 
 /**
  *
  */
 private static final long serialVersionUID = 2733147315082601065L;

 protected void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  // TODO Auto-generated method stub
  String url=request.getRequestURI().toString();
  System.out.println(url);
  PrintWriter out =response.getWriter();
  out.println("hello");
 }

}

修改web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="2.5" 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_2_5.xsd"> 
<servlet> 
<servlet-name>helloa</servlet-name> 
<servlet-class>com.amaker.servlet.HelloServlet</servlet-class> 
</servlet> 
<servlet-mapping> 
<servlet-name>helloa</servlet-name> 
<url-pattern>/servlet/hello</url-pattern> 
</servlet-mapping> 
<welcome-file-list> 
<welcome-file>index.jsp</welcome-file> 
</welcome-file-list> 
<login-config> 
<auth-method>BASIC</auth-method> 
</login-config> 
</web-app>
2.用表单调用：
在WebRoot文件夹中，添加一个HTML文件，Tset.html
<!DOCTYPE html>
<html>
  <head>
    <title>Tset.html</title>
 
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
   
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

  </head>
 
  <body>
 <form action="/HelloServlet/servlet/hello">
  <input type="submit" value="Test">
 </form>
  </body>
</html>
3.用超级链接调用Servler
 <hr>
 <a href="/HelloServlet/servlet/hello">link...</a>
4.用javascript调用servlet
<!DOCTYPE html>
<html>
  <head>
    <title>Tset.html</title>
 
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
   
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
 <script type="text/javascript">
  function test()
  {
   var f=document.forms[0];
   f.action="/HelloServlet/servlet/hello";
   f.submit();
   
  }
 </script>
  </head>
 
  <body>
 <form action="/HelloServlet/servlet/hello">
  <input type="submit" value="Test">
  <input type="button" value="click me" onclick="test()">
 </form>
 <hr>
 <a href="/HelloServlet/servlet/hello">link...</a>
  </body>
</html>]

 

 

posted @ 2015-03-24 13:31  lily园  Views(482)  Comments(0)    收藏  举报