鉴权拦截器-跳转登录页面

当我们校验到没有登录的用户，需要转发到登录页面的时候可以参考

先上核心代码

package com.xxl.job.admin.controller.interceptor;

import org.springframework.web.servlet.AsyncHandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author jianyongchao
 * @date: 2022-05-06 16:07:45
 * @company: tianbo
 * @description:
 * AsyncHandlerInterceptor
 */
public class JycIntercepter implements AsyncHandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {

        //模拟没有登录的情况
        String loginUser = null;
        if (loginUser == null) {
            //声明要跳转
            response.setStatus(302);
            //声明往哪跳  
            response.setHeader("location" , request.getContextPath() + "/toLogin");
            return false;
        }
        return AsyncHandlerInterceptor.super.preHandle(request, response, handler);
    }
}
---------------------------------------------------------

/**
 * index controller
 *
 * @author  jianyongchao
 */
@Controller
public class IndexController {

  
    @Resource
    private LoginService loginService;


    
    @RequestMapping("/toLogin")
    @PermissionLimit(limit = false)
    public ModelAndView toLogin(HttpServletRequest request, HttpServletResponse response, ModelAndView modelAndView) {
        //判断下子 没登录就滚一边去（去登录）
        if (loginService.ifLogin(request, response) != null) {
            modelAndView.setView(new RedirectView("/" , true, false));
            return modelAndView;
        }
        return new ModelAndView("login");
    }

    @RequestMapping(value = "login" , method = RequestMethod.POST)
    @ResponseBody
    @PermissionLimit(limit = false)
    public ReturnT<String> loginDo(HttpServletRequest request, HttpServletResponse response, String userName, String password, String ifRemember) {
        boolean ifRem = (ifRemember != null && ifRemember.trim().length() > 0 && "on".equals(ifRemember)) ? true : false;
        return loginService.login(request, response, userName, password, ifRem);
    }

    @RequestMapping(value = "logout" , method = RequestMethod.POST)
    @ResponseBody
    @PermissionLimit(limit = false)
    public ReturnT<String> logout(HttpServletRequest request, HttpServletResponse response) {
        return loginService.logout(request, response);
    }

}
-------------------------------------------------------

参考