fix bug

@@ -53,14 +53,17 @@ public class ConfigTypeServiceImpl implements IConfigTypeService, InitializingBe
                 .withYhRedis(redisTemplate, valueOperations)
                 .withExpire(5, TimeUnit.SECONDS)
                 .withKeySerializer(new KeySerializer<String>() {
+
+                    private String keyPrefix = "ufo:resources:configType:code:";
+
                     @Override
                     public RedisKeyBuilder serialize(String obj) {
-                        return new RedisKeyBuilder().appendFixed("ufo:resources:configType:code:").appendVar(obj);
+                        return new RedisKeyBuilder().appendFixed(keyPrefix).appendVar(obj);
                     }
 
                     @Override
                     public String deserialize(RedisKeyBuilder keyBuilder) {
-                        return keyBuilder.getKey().substring(keyBuilder.getKey().lastIndexOf("ufo:resources:configType:") + 1);
+                        return keyBuilder.getKey().substring(keyBuilder.getKey().lastIndexOf(keyPrefix) + 1);
                     }
                 })
                 .withValueSerializer(new ValueSerializer<ConfigType>() {