精简util模块，ReturenResponse重构

server/src/main/java/cn/keking/service/cache/impl/CacheServiceRedisImpl.java

@@ -28,19 +28,11 @@ public class CacheServiceRedisImpl implements CacheService {
     }
 
     @Override
-    public void initPDFCachePool(Integer capacity) {
-
-    }
-
+    public void initPDFCachePool(Integer capacity) { }
     @Override
-    public void initIMGCachePool(Integer capacity) {
-
-    }
-
+    public void initIMGCachePool(Integer capacity) { }
     @Override
-    public void initPdfImagesCachePool(Integer capacity) {
-
-    }
+    public void initPdfImagesCachePool(Integer capacity) { }
 
     @Override
     public void putPDFCache(String key, String value) {

server/src/main/java/cn/keking/service/cache/impl/CacheServiceRocksDBImpl.java

@@ -31,11 +31,8 @@ public class CacheServiceRocksDBImpl implements CacheService {
     }
 
     private static final String DB_PATH = ConfigUtils.getHomePath() + File.separator + "cache";
-
     private static final int QUEUE_SIZE = 500000;
-
     private static final Logger LOGGER = LoggerFactory.getLogger(CacheServiceRocksDBImpl.class);
-
     private final BlockingQueue<String> blockingQueue = new ArrayBlockingQueue<>(QUEUE_SIZE);
 
     private RocksDB db;