Java에서 IP 블랙리스트를 구현하는 코드 예

public class BlackList {

  private int id;
  private String ip;
  private Date iptime; // 日期类型，格式：yyyy-MM-dd HH:mm:ss
  //构造器
  public BlackList() {
  }

  public BlackList(String ip, Date iptime) {
    this.ip = ip;
    this.iptime = iptime;
  }
  // get && set 方法
}

@Mapper
public interface BlackListDao {
  // 根据IP来查找记录
  List<BlackList> findByIp(String ip);
  // 添加记录
  int addBlackList(@Param("blackList") BlackList blackList);
}

public class URLInterceptor implements HandlerInterceptor {

  @Autowired
  BlackListDao blackListDao;

  private Map<String, Integer> redisTemplate = new HashMap<String, Integer>();
  private static final Logger logger = LoggerFactory.getLogger(URLInterceptor.class);

  //在请求处理之前进行调用（Controller方法调用之前）
  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
    return true;
  }

  //请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）
  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
    String ip = IPAddressUtil.getClientIpAddress(httpServletRequest);
    List<BlackList> blackLists = blackListDao.findByIp(ip);
    if (blackLists == null || blackLists.size() == 0){
      urlHandle(httpServletRequest, 5000, 10);
    } else {
      //强制控制跳转
      modelAndView.setViewName("/errorpage/error.html");
    }
  }

  //在整个请求结束之后被调用
  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

  }

  public void urlHandle(HttpServletRequest request, long limitTime,int limitCount) throws RequestLimitException {
      /**
       * 省略业务逻辑部分，参考"准备"步骤
       */
      if (count > limitCount){ //符合锁定条件
        Calendar calendar = Calendar.getInstance();
        Date iptime=calendar.getTime();
        BlackList blackList = new BlackList(ip, iptime);
        blackListDao.addBlackList(blackList);
        throw new RequestLimitException();
      }
  }
}

@Configuration
public class MyWebAppConfigurer extends WebMvcConfigurerAdapter {

  @Bean  //把我们的拦截器注入为bean
  public HandlerInterceptor getMyInterceptor(){
    return new URLInterceptor();
  }

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    // 多个拦截器组成一个拦截器链
    // addPathPatterns 用于添加拦截规则, 这里假设拦截 /url 后面的全部链接
    // excludePathPatterns 用户排除拦截
    registry.addInterceptor(getMyInterceptor()).addPathPatterns("/url/**");
    super.addInterceptors(registry);
  }
}

  @RequestMapping("/url/test")
  @ResponseBody
  public String URLtest() {
    return "success";
  }