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jsp response.sendRedirect()用法詳解

更新時(shí)間：2021年08月17日 17:29:09 作者：數(shù)學(xué)家是我理想

這篇文章主要介紹了jsp response.sendRedirect()用法詳解,本篇文章通過(guò)簡(jiǎn)要的案例,講解了該項(xiàng)技術(shù)的了解與使用,以下就是詳細(xì)內(nèi)容,需要的朋友可以參考下

sendRedirect()

response和request一樣都是jsp內(nèi)置對(duì)象，request是獲取用戶的請(qǐng)求，response處理用戶請(qǐng)求。sendRedirect()函數(shù)的作用是重定向網(wǎng)頁(yè)，向?yàn)g覽器發(fā)送一個(gè)特殊的Header，然后由瀏覽器來(lái)做重定向，轉(zhuǎn)到指定的頁(yè)面。下面我將創(chuàng)建四個(gè)頁(yè)面，首先是sex.jsp，有一個(gè)下拉列表和提交按鈕確定，選擇“男”，就跳轉(zhuǎn)到male.jsp，選擇“女”就跳轉(zhuǎn)到female.jsp，中間通過(guò)sex_action.jsp進(jìn)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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