/**
     * 后管登出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> loginOut(HttpServletRequest request){
        // 去除session
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

package com.itheima.reggie.filter;
import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
 * @author jektong
 * @date 2022/4/26
 */
@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    // 進(jìn)行路徑匹配，支持通配符
    public static final AntPathMatcher ANT_PATH_MATCHER = new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest,
                         ServletResponse servletResponse,
                         FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //獲取本次處理請(qǐng)求的URL
        String requestURI = request.getRequestURI();
        String[] urls = new String[]{
          "/employee/login",
          "/employee/logout",
          "/backend/**",
          "/front/**"
        };
        //判斷本次請(qǐng)求是否需要處理
        boolean check = this.check(urls, requestURI);
        log.info("攔截到請(qǐng)求：{}", requestURI);
        //若不需要，直接放行
        if (check){
            log.info("請(qǐng)求無(wú)需登錄：{}", requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        //判斷登陸狀態(tài)，若已經(jīng)登陸直接放行
        if(request.getSession().getAttribute("employee") != null){
            log.info("用戶已登錄，id為：{}", request.getSession().getAttribute("employee"));
            filterChain.doFilter(request,response);
            return;
        }
        //若未登陸則返回未登陸結(jié)果
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }
    /**
     * 進(jìn)行路徑匹配，檢查是否可以放行
     * @param urls 不攔截的路徑
     * @param requestURI 請(qǐng)求路徑
     * @return
     */
    public boolean check(String[] urls, String requestURI) {
        for(String url : urls){
            boolean match = ANT_PATH_MATCHER.match(url,requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}

// 響應(yīng)攔截器
  service.interceptors.response.use(res => {
      if (res.data.code === 0 && res.data.msg === 'NOTLOGIN') {// 返回登錄頁(yè)面
        console.log('---/backend/page/login/login.html---')
        localStorage.removeItem('userInfo')
        window.top.location.href = '/backend/page/login/login.html'
      } else {
        return res.data
      }
    }