一，技術要點：springboot的基本知識，redis基本操作，

首先是寫一個注解類：

importjava.lang.annotation.Retention;
importjava.lang.annotation.Target;

importstaticjava.lang.annotation.ElementType.METHOD;
importstaticjava.lang.annotation.RetentionPolicy.RUNTIME;

/**
*@authoryhq
*@date2018/9/1015:52
*/

@Retention(RUNTIME)
@Target(METHOD)
public@interfaceAccessLimit{

intseconds();
intmaxCount();
booleanneedLogin()defaulttrue;
}

攔截器中實現：

importcom.alibaba.fastjson.JSON;
importcom.example.demo.action.AccessLimit;
importcom.example.demo.redis.RedisService;
importcom.example.demo.result.CodeMsg;
importcom.example.demo.result.Result;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.stereotype.Component;
importorg.springframework.web.method.HandlerMethod;
importorg.springframework.web.servlet.handler.HandlerInterceptorAdapter;

importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importjava.io.OutputStream;

/**
*@authoryhq
*@date2018/9/1016:05
*/


@Component
publicclassFangshuaInterceptorextendsHandlerInterceptorAdapter{

@Autowired
privateRedisServiceredisService;

@Override
publicbooleanpreHandle(HttpServletRequestrequest,HttpServletResponseresponse,Objecthandler)throwsException{

//判斷請求是否屬于方法的請求
if(handlerinstanceofHandlerMethod){

HandlerMethodhm=(HandlerMethod)handler;

//獲取方法中的注解,看是否有該注解
AccessLimitaccessLimit=hm.getMethodAnnotation(AccessLimit.class);
if(accessLimit==null){
returntrue;
}
intseconds=accessLimit.seconds();
intmaxCount=accessLimit.maxCount();
booleanlogin=accessLimit.needLogin();
Stringkey=request.getRequestURI();
//如果需要登錄
if(login){
//獲取登錄的session進行判斷
//.....
key+=""+"1";//這里假設用戶是1,項目中是動態獲取的userId
}

//從redis中獲取用戶訪問的次數
AccessKeyak=AccessKey.withExpire(seconds);
Integercount=redisService.get(ak,key,Integer.class);
if(count==null){
//第一次訪問
redisService.set(ak,key,1);
}elseif(count

	

	注冊到springboot中

	
importcom.example.demo.ExceptionHander.FangshuaInterceptor;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.web.servlet.config.annotation.InterceptorRegistry;
importorg.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
*@authoryhq
*@date2018/9/1015:58
*/
@Configuration
publicclassWebConfigextendsWebMvcConfigurerAdapter{

@Autowired
privateFangshuaInterceptorinterceptor;


@Override
publicvoidaddInterceptors(InterceptorRegistryregistry){
registry.addInterceptor(interceptor);
}
}


	

	在Controller中加入注解

	
importcom.example.demo.result.Result;
importorg.springframework.stereotype.Controller;
importorg.springframework.web.bind.annotation.RequestMapping;
importorg.springframework.web.bind.annotation.ResponseBody;

/**
*@authoryhq
*@date2018/9/1015:49
*/

@Controller
publicclassFangshuaController{

@AccessLimit(seconds=5,maxCount=5,needLogin=true)
@RequestMapping("/fangshua")
@ResponseBody
publicResultfangshua(){


returnResult.success("請求成功");

}


	

	







	審核編輯：劉清