package com.dongao.project.aspectj.interceptor;
import com.dongao.project.api.domain.Constants;
import com.dongao.project.aspectj.json.Json;
import com.ruoyi.common.utils.ServletUtils;
import com.ruoyi.framework.web.domain.AjaxResult;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * @author： dongao
 * @create: 2019/10/31
 */
@Component
public abstract class PermissionIntercepter extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception
    {
        if (this.isBlack(request)) {
            AjaxResult ajaxResult = new AjaxResult();
            ajaxResult.put("code", Constants.CODE.USER_IN_BLACKLIST.getValue());
            ajaxResult.put("msg", Constants.CODE.USER_IN_BLACKLIST.getDescription());
            ajaxResult.put("obj", "");
            ServletUtils.renderString(response, Json.marshal(ajaxResult));
            return false;
        }
        return true;
    }
    /**
     * 判断是否是黑名单用户
     * @param request
     * @return
     * @throws Exception
     */
    public abstract boolean isBlack(HttpServletRequest request) throws Exception;
}

package com.dongao.project.aspectj.interceptor.impl;
import com.dongao.project.api.domain.Constants;
import com.dongao.project.aspectj.interceptor.PermissionIntercepter;
import com.dongao.project.utils.RedisUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.servlet.http.HttpServletRequest;
/**
 * 判断是否是黑名单用户
 * @author： dongao
 * @create: 2019/10/31
 */
@Component
public class UserBlackIntercepter extends PermissionIntercepter {
    private static final Logger logger = LoggerFactory.getLogger(UserBlackIntercepter.class);
    @Override
    public boolean isBlack(HttpServletRequest request) throws Exception {
        String userId = request.getParameter("userId");
        logger.info("开始校验当前用户userId:【{}】是否是黑名单用户======",userId);
        boolean result = RedisUtils.hasKey(Constants.COMMUNITY_USER_BLACK_KEY + userId);
        logger.info("校验当前用户userId:【{}】是否是黑名单用户结果result:【{}】======",userId,result);
        return result;
    }
}

package com.dongao.project.config;
import com.dongao.project.aspectj.interceptor.PermissionIntercepter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
 * @ClassName PermissionConfig
 * @Author dongao
 * @Version 1.0
 * @Date 2019/10/31 0028 下午 8:07
 **/
@Configuration
public class PermissionConfig implements WebMvcConfigurer  {
    @Autowired
    private PermissionIntercepter permissionIntercepter;
    /**
     * 自定义拦截规则
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry)
    {
        String permissionUrl = ConfigConstant.permissionUrl;
        String[] split = permissionUrl.split(",");
        registry.addInterceptor(permissionIntercepter).addPathPatterns(split);
    }
}