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+"/";
%

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%" rel="external nofollow"  rel="external nofollow" 

titleSex 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" 

titleMy 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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