获取缓存中的User对象

package com.example.demo.common.util;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import com.example.demo.entity.user.UserDO;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;


public class UserUtil {
    public static final String LOGIN_USER = "loginUser";

    public static void setUser(UserDO userDO, HttpSession session) {
        session.setAttribute(LOGIN_USER, userDO);
    }

    public static UserDO getUser(HttpSession session) {
        return (UserDO)session.getAttribute(LOGIN_USER);
    }

    public static UserDO getUser() {
        return (UserDO)getsession().getAttribute(LOGIN_USER);
    }

    public static HttpSession getsession() {
        return getRequest().getSession();
    }

    public static HttpServletRequest getRequest()
    {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();

        HttpServletRequest request = requestAttributes.getRequest();

        return request;
    }
}