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jsp response.sendRedirect()用法詳解
瀏覽：222日期：2022-06-08 08:14:24
sendRedirect()
response和request一樣都是jsp內(nèi)置對象，request是獲取用戶的請求，response處理用戶請求。sendRedirect()函數(shù)的作用是重定向網(wǎng)頁，向?yàn)g覽器發(fā)送一個特殊的Header，然后由瀏覽器來做重定向，轉(zhuǎn)到指定的頁面。下面我將創(chuàng)建四個頁面，首先是sex.jsp，有一個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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