JSP case _ pass Cookie value, jsp case _ cookie

JSP case _ pass Cookie value, jsp case _ cookie

JSP case _ Cookie value passing

1. Case requirements

Create a producer.

When the user enters the secondary node for the second time within 30 seconds

2. Case Analysis

Use the Cookie to pass the value and set the Cookie time, that is, 30 seconds. In the time range, enter

3. Code Analysis

Code implementation is not difficult. It mainly involves the use of Cookie APIs and a logical relationship.

4. Code

Https://blog.csdn.net/ag_nevergiveup/article/details/a.jsp:

<% @ Page import = "java.net. URLDecoder "%> <% @ page import =" java.net. URLEncoder "%> <% @ page import =" org. apache. taglibs. standard. tag. common. core. forEachSupport "%> <% @ page language =" java "import =" java. util. * "pageEncoding =" UTF-8 "%> <% request. setCharacterEncoding ("UTF-8"); Cookie [] cookis = request. getCookies (); String username = ""; String userpassword = ""; if (cookis. length> 1) {for (int I = 0; I
 
  
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D. jsp:

<%@page import="java.net.URLEncoder"%><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%request.setCharacterEncoding("utf-8");String name = request.getParameter("name");name = URLEncoder.encode(name, "utf-8");String password = request.getParameter("password");Cookie c1 = new Cookie("name",name);Cookie c2 = new Cookie("password",password);c1.setMaxAge(30);c2.setMaxAge(30);response.addCookie(c1);response.addCookie(c2);%>goto https://blog.csdn.net/ag_nevergiveup/article/details/a.jsp

5. Problem Analysis

Cookie cannot pass Chinese characters,

To pass a value, use the following code:

String s = URLEncoder (String, encoding)

Encode and then pass the value;

The value must be similar:

String s = URLDecoder (String, encoding)

Decoded to obtain the value;