fix 提升锁的作用域 并采用双重校验锁

Signed-off-by: fanc <1571025887@qq.com>

ruoyi-common/ruoyi-common-oss/src/main/java/org/dromara/common/oss/factory/OssFactory.java

@@ -25,6 +25,8 @@ public class OssFactory {
 
     private static final Map<String, OssClient> CLIENT_CACHE = new ConcurrentHashMap<>();
 
+    private static final ReentrantLock lock = new ReentrantLock();
+
     /**
      * 获取默认实例
      */
@@ -51,12 +53,14 @@ public class OssFactory {
         OssClient client = CLIENT_CACHE.get(key);
         // 客户端不存在或配置不相同则重新构建
         if (client == null || !client.checkPropertiesSame(properties)) {
-            ReentrantLock lock = new ReentrantLock();
             lock.lock();
             try {
+                client = CLIENT_CACHE.get(key);
+                if (client == null || !client.checkPropertiesSame(properties)) {
                     CLIENT_CACHE.put(key, new OssClient(configKey, properties));
                     log.info("创建OSS实例 key => {}", configKey);
                     return CLIENT_CACHE.get(key);
+                }
             } finally {
                 lock.unlock();
             }