Java 我需要明确关闭连接吗？
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Do I need to explicitly close connection?
提问by danieln
I'm holding one instance of MongoClientand DBin my application, and every time that I want to execute some operation I call getCollection().
I'm wondering if I need to explicitly close the connection, just like connection.close()in JDBC.
我手里拿的一个实例MongoClient，并DB说我要执行一些操作我电话，每次我的应用程序，和getCollection()。
我想知道是否需要明确关闭连接，就像connection.close()在 JDBC 中一样。
To emphasize, I have only one MongoClientinstance. My question is not about closing MongoClientbut closing the connections I believe it opens when I'm calling getCollection().
为了强调，我只有一个MongoClient实例。我的问题不是关闭MongoClient而是关闭连接我相信它会在我打电话时打开getCollection()。
采纳答案by Asya Kamsky
No, you do not need to close connections to DB - your only connection is via MongoClient and as the documentation states - it handles connection pooling for you.
不，您不需要关闭与 DB 的连接 - 您唯一的连接是通过 MongoClient 并且如文档所述 - 它为您处理连接池。
The only resource that you would want to clean up would be a cursorwhich you should close()when you're done with it.
回答by MariuszS
You should close if you have many MongoClient.
如果你有很多 MongoClient，你应该关闭。
The MongoClient instance actually represents a pool of connections to the database; you will only need one instance of class MongoClient even with multiple threads.
MongoClient.close() to clean up resources
MongoClient.close() - closes the underlying connector, which in turn closes all open connections. Once called, this Mongo instance can no longer be used.
MongoClient 实例实际上代表了一个到数据库的连接池；即使有多个线程，您也只需要 MongoClient 类的一个实例。
MongoClient.close() 清理资源
MongoClient.close() - 关闭底层连接器，进而关闭所有打开的连接。一旦被调用，这个 Mongo 实例就不能再使用了。
More: http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/
更多：http: //docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/
