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使用 @CookieValue 绑定请求中的 Cookie 值，@CookieValue 可让处理方法入参绑定某个 Cookie 值。
例如：
jsp页面
<%--
Created by IntelliJ IDEA.
User: 23369
Date: 2019/3/24
Time: 18:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<a href="helloworld_mvc/testcookvalue">testcookvalue</a>
</body>
</html>
Java类
package com.helloworld;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import javax.swing.text.html.HTMLDocument;
@Controller
@RequestMapping("/helloworld_mvc")
public class HelloWorld {
@RequestMapping("testcookvalue")
public String testcookvalue(@CookieValue("JSESSIONID") String sessionid){
System.out.println(sessionid);
return "success";
}
}