Springboot项目的接口防刷的实例

今天跟大家分享Springboot项目的接口防刷的实例的知识。

1 Springboot项目的接口防刷的实例

说明：使用了注解的方式进行对接口防刷的功能，非常高大上，本文章仅供参考。

技术要点：springboot的基本知识，redis基本操作，首先是写一个注解类：

import java.lang.annotation.Retention;import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.METHOD;import static java.lang.annotation.RetentionPolicy.RUNTIME;
/** * @author yhq * @date 2018/9/10 15:52 */
@Retention(RUNTIME)@Target(METHOD)public @interface AccessLimit {
    int seconds();    int maxCount();    boolean needLogin()default true;}

接着就是在Interceptor拦截器中实现：​​​​​​​

import com.alibaba.fastjson.JSON;import com.example.demo.action.AccessLimit;import com.example.demo.redis.RedisService;import com.example.demo.result.CodeMsg;import com.example.demo.result.Result;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import org.springframework.web.method.HandlerMethod;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.OutputStream;
/** * @author yhq * @date 2018/9/10 16:05 */

@Componentpublic class FangshuaInterceptor extends HandlerInterceptorAdapter {
    @Autowired    private RedisService redisService;
    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断请求是否属于方法的请求        if(handler instanceof HandlerMethod){
            HandlerMethod hm = (HandlerMethod) handler;
            //获取方法中的注解,看是否有该注解            AccessLimit accessLimit = hm.getMethodAnnotation(AccessLimit.class);            if(accessLimit == null){                return true;            }            int seconds = accessLimit.seconds();            int maxCount = accessLimit.maxCount();            boolean login = accessLimit.needLogin();            String key = request.getRequestURI();            //如果需要登录            if(login){                //获取登录的session进行判断                //.....                key+=""+"1";  //这里假设用户是1,项目中是动态获取的userId            }
            //从redis中获取用户访问的次数            AccessKey ak = AccessKey.withExpire(seconds);            Integer count = redisService.get(ak,key,Integer.class);            if(count == null){                //第一次访问                redisService.set(ak,key,1);            }else if(count < maxCount){                //加1                redisService.incr(ak,key);            }else{                //超出访问次数                render(response,CodeMsg.ACCESS_LIMIT_REACHED); //这里的CodeMsg是一个返回参数                return false;            }        }
        return true;
    }    private void render(HttpServletResponse response, CodeMsg cm)throws Exception {        response.setContentType("application/json;charset=UTF-8");        OutputStream out = response.getOutputStream();        String str  = JSON.toJSONString(Result.error(cm));        out.write(str.getBytes("UTF-8"));        out.flush();        out.close();    }}

再把Interceptor注册到springboot中​​​​​​​

import com.example.demo.ExceptionHander.FangshuaInterceptor;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.WebMvcConfigurerAdapter;
/** * @author yhq * @date 2018/9/10 15:58 */@Configurationpublic class WebConfig extends WebMvcConfigurerAdapter {
    @Autowired    private FangshuaInterceptor interceptor;

    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(interceptor);    }}

接着在Controller中加入注解​​​​​​​

import com.example.demo.result.Result;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;
/** * @author yhq * @date 2018/9/10 15:49 */
@Controllerpublic class FangshuaController {
    @AccessLimit(seconds=5, maxCount=5, needLogin=true)    @RequestMapping("/fangshua")    @ResponseBody    public Result<String> fangshua(){
        return Result.success("请求成功");
    }