response.sendRedirect()的用法

sendRedirect()展开目录

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%>">

<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%>">

<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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response.sendRedirect () 的用法

September 20, 2018 • Read: 4015 • JSP • 阅读设置

sendRedirect()展开目录