feat()：增加缓存代码示例

cloud-common/cloud-common-redis/src/main/java/com/muyu/common/redis/service/RedisService.java

@@ -235,7 +235,7 @@ public class RedisService {
      *
      * @return Hash对象集合
      */
-    public <T> List<T> getMultiCacheMapValue (final String key, final Collection<Object> hKeys) {
+    public <T> List<T> getMultiCacheMapValue (final String key, final Collection<String> hKeys) {
         return redisTemplate.opsForHash().multiGet(key, hKeys);
     }
 
@@ -262,6 +262,16 @@ public class RedisService {
         return redisTemplate.keys(pattern);
     }
 
+
+    /**
+     * 判断redis中hashKey是否存在
+     * @param key redis键
+     * @param hashKey hash键
+     */
+    public boolean hashKey(final String key, final String hashKey){
+        return this.redisTemplate.opsForHash().hasKey(key, hashKey);
+    }
+
     /**
      * 减少序列值
      * @param key key