作者：CS打贏你blog.csdn.net/weixin_42533856/article/details/82593123
說明：使用了註解的方式進行對接口防刷的功能，非常高大上，本文章僅供參考
# 技術要點：springboot的基本知識，redis基本操作
首先是寫一個註解類：
import java.lang.annotation.Retention;import java.lang.annotation.Target; import static java.lang.annotation.ElementType.METHOD;import static java.lang.annotation.RetentionPolicy.RUNTIME; @Retention(RUNTIME)@Target(METHOD)public @interface AccessLimit { int seconds(); int maxCount(); boolean needLogin()default true;}
接着就是在Interceptor攔截器中實現：
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; @Componentpublic class FangshuaInterceptor extends HandlerInterceptorAdapter { @Autowired private RedisService redisService; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { //判斷請求是否屬於方法的請求 if(handler instanceof HandlerMethod){ HandlerMethod hm = (HandlerMethod) handler; //獲取方法中的註解,看是否有該註解 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(); //如果需要登錄 if(login){ //獲取登錄的session進行判斷 //..... key+=""+"1"; //這裏假設用戶是1,項目中是動態獲取的userId } //從redis中獲取用戶訪問的次數 AccessKey ak = AccessKey.withExpire(seconds); Integer count = redisService.get(ak,key,Integer.class); if(count == null){ //第一次訪問 redisService.set(ak,key,1); }else if(count < maxCount){ //加1 redisService.incr(ak,key); }else{ //超出訪問次數 render(response,CodeMsg.ACCESS_LIMIT_REACHED); //這裏的CodeMsg是一個返回參數 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註冊到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;
@Configurationpublic class WebConfig extends WebMvcConfigurerAdapter { @Autowired private FangshuaInterceptor interceptor; @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(interceptor); }}
接着在Controller中加入註解
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; @Controllerpublic class FangshuaController { @AccessLimit(seconds=5, maxCount=5, needLogin=true) @RequestMapping("/fangshua") @ResponseBody public Result<String> fangshua(){ return Result.success("請求成功"); }
本文有參考其他視頻的教學，希望可以幫助更多熱愛it行業的人，
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