Redis方法注解式缓存

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/**  *  方法缓存注解  *  *  */ @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface MethodCache {   /**    * redisKey 的一部分 最终的 rediskey是 appId + subAppId + key + (方法对应的参数）    *    */    String key();      /**     *  缓存时间 单位为秒     */     int expireTime() default 3600; }   @Sl4j @Aspect @Component public class MethodCacheAspect {      @Resource      private RedisTemplate<String, String> redisTemplate;        @Value("${application.appId}")      private String appId;             @Value("${application.subAppId}")      private String subAppId;        @Pointcut(value = "@annotation(com.fengye.it.utils.annotations.MethodCache)")      public Object doAround(ProceedingJoinPointjoinPoint, MethodCache methodCache) throws Throwable {          log.info("MethodCacheAspect doAround start==>);          // 构造KEY appId + subAppId + key + （方法对应的参数）          StringBuilder sb = new StringBuilder(appId);          sb.append(subAppId).append(methodCache.key());          Object[] args = joinPoint.getArgs();          if (args != null && args.length !=0) {             for (Object arg : args) {                 sb.append(arg.toString());             }          }          String redisKey = sb.toString();          log.info("MethodCacheAspect doAround redisKey==>:{}", redisKey);            // 获取缓存 没有则新增          String value = redisTemplate.opsForValue().get(redisKey);          if (value == null) {              // 没有缓存 则执行方法              Object proceed = joinPoint.proceed();              String jsonString = JSONObject.toJSONString(proceed, SerializerFeature.WriteMapNullValue);              // 并保存到redis              redisTemplate.opsForValue().set(redisKey, jsonString, methodCache.expireTime(), TimeUnit.SECONDS);              return proceed;          }          // 获取目标方法对应返回值的class对象          Signature signature = joinPoint.getSignature();          if (signature instanceof MethodSignature) {              Class returnType = ((MethodSignature) signature).getReturnType();              return JSONObject.parseObject(value).toJavaObject(returnType);          }          log.error("MethodCacheAspect doAround signature is not MethodSignature redisKey==>:{}", redisKey);          return joinPoint.proceed();      } }