request对象和response对象(9)

来源：未知责任编辑：责任编辑发表时间:2014-05-10 12:18　点击:次

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p>import java.io.IOException;

p>import javax.servlet.ServletException;

p>import javax.servlet.http.HttpServlet;

p>import javax.servlet.http.HttpServletRequest;

p>import javax.servlet.http.HttpServletResponse;

p>public class RequestDemo3 extends HttpServlet {

p> //防盗链

p> public void doGet(HttpServletRequest request, HttpServletResponse response)

p> throws ServletException, IOException {

p> //通过getHeader获得referer头信息

p> String referer = request.getHeader("referer");

p> //判断头信息可以知道是不是盗链

p> response.setContentType("text/html;charset=utf-8");

p> if(referer == null || !referer.startsWith("http://localhost")){

p> //盗链

p> response.getWriter().println("是盗链");

p> }else{

p> //不是盗链

p> response.getWriter().println("真不是盗链");

p> }

p> public void doPost(HttpServletRequest request, HttpServletResponse response)

p> throws ServletException, IOException {

p> doGet(request,response);

p> }

p>}

p>复制代码

p>4.获取客户机请求参数

p>常用API四个

p>getParameter

p>getParameterValues

p>getParameterNames

p>getParameterMap

p>eg：

p>复制代码

p><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

p><html>

p> <head>

p> <title>request.html</title>

p> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

p> <meta http-equiv="description" content="this is my page">

p> <meta http-equiv="content-type" content="text/html; charset=UTF-8">

p> </head>

p> <body>

p> <h1>分别以get和post方式提交数据</h1>

p> <h1>第一种：通过超链接提交数据以？方式</h1>

p> <a href="/Request/servlet/RequestDemo4?name=zhangsan&city=shenzhen">超链接提交数据</a>

p> <h1>第二种：通过form的post方式提交数据</h1>

p> <form action="/Request/servlet/RequestDemo4" method="post">

p> 姓名<input type="text" name="name" /><br/>

request对象和response对象(9)

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