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概述

使用

创建ThreadLocalUtil工具类

utils/ThreadLocalUtil.java

package org.example.utils;/*** ThreadLocal 工具类*/
@SuppressWarnings("all")
public class ThreadLocalUtil {//提供ThreadLocal对象,private static final ThreadLocal THREAD_LOCAL = new ThreadLocal();//根据键获取值public static <T> T get(){return (T) THREAD_LOCAL.get();}//存储键值对public static void set(Object value){THREAD_LOCAL.set(value);}//清除ThreadLocal 防止内存泄漏public static void remove(){THREAD_LOCAL.remove();}
}

在登录拦截器中使用ThreadLocal存储登录用户名

interceptors/LoginInteceptor.java

//将解析用户名保存到ThreadLocal中
ThreadLocalUtil.set(claims);

请求处理完成后，清空ThreadLocal中的数据,防止内存泄漏

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {// 请求处理完成后，清空ThreadLocal中的数据ThreadLocalUtil.remove();
}

在/userInfo接口中获取登录用户名

controller/UserController.java

//从threadLocal中获取用户信息
Map<String, Object> claims = ThreadLocalUtil.get();
String username = (String) claims.get("username");

注意事项

参考视频

https://www.bilibili.com/video/BV14z4y1N7pg?spm_id_from=333.788.player.switch&vd_source=0467ab39cc5ec5940fee22a0e7797575&p=23