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jsp response.sendRedirect()用法详解

程序员文章站 2022-06-17 19:38:28
sendredirect()response和request一样都是jsp内置对象,request是获取用户的请求,response处理用户请求。sendredirect()函数的作用是重定向网页,向...

sendredirect()

response和request一样都是jsp内置对象,request是获取用户的请求,response处理用户请求。sendredirect()函数的作用是重定向网页,向浏览器发送一个特殊的header,然后由浏览器来做重定向,转到指定的页面。下面我将创建四个页面,首先是sex.jsp,有一个下拉列表和提交按钮确定,选择“男”,就跳转到male.jsp,选择“女”就跳转到female.jsp,中间通过sex_action.jsp进行重定向

<!-- sex.jsp -->
<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%
string path = request.getcontextpath();
string basepath = request.getscheme()+"://"+request.getservername()+":"+request.getserverport()+path+"/";
%>

<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
<head>
<base href="<%=basepath%>" rel="external nofollow"  rel="external nofollow" >

<title>sex select's page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
</head>
<body>
	<form action="<%=basepath%>c03/sex_action.jsp" method="post">
		<select name="sex">
			<option>男</option>
			<option>女</option>
		</select>
		<button type="submit">提交</button>
	</form>
</body>
</html>
<!-- sex_action.jsp -->
<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%
string path = request.getcontextpath();
string basepath = request.getscheme()+"://"+request.getservername()+":"+request.getserverport()+path+"/";
%>

<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
<head>
<base href="<%=basepath%>" rel="external nofollow"  rel="external nofollow" >

<title>my jsp 'sex_action.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
</head>
<body>
	<% 
    	request.setcharacterencoding("utf-8");
    	string sex = request.getparameter("sex");
    	out.println(sex);
    	if("男".equals(sex)) {
    		response.sendredirect("male.jsp");
    		return;
    	}
    	else if("女".equals(sex)) {
    		response.sendredirect("female.jsp");
    		return;
    	}
    %>
</body>
</html>

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