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jsp response.sendRedirect()用法详解

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+"/";
%><base href="<%=basepath%>" kesrc="<%=basepath%>" 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"> 	<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> <link href="https://csdnimg.cn/release/blogv2/dist/mdeditor/css/style-49037e4d27.css" rel="external nofollow">
<!-- 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+"/";
%><base href="<%=basepath%>" kesrc="<%=basepath%>" 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"> 	<% 
    	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;
    	}
    %>

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