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The moose likes JDBC and Relational Databases and the fly likes closing the database connection Big Moose Saloon
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closing the database connection

trupti nigam
Ranch Hand

Joined: Jun 21, 2001
Posts: 613
Hello All,

In my code, I have made sure that I am closing all the open dataBase connections like below:


where conn is the connection object. and null is for preparedStatement.

In the dao close() method if connection is not null, con.close() (java method) is called.
While debugging the application , I found out that the connection is not getting close.

my question is : does the connection is closed by calling connection.close method (provied by jdk) or it just marks it for garbage collection.

How can I make sure that the connection is getting closed? (is it by passing exclusively null for connection object?)

[ April 19, 2005: Message edited by: trupti nigam ]
Jeanne Boyarsky
author & internet detective

Joined: May 26, 2003
Posts: 31634

If you are using a connection pool, close() returns the connection to the pool. If you are not using a connection pool, close() closes the connection.

close() does not null out the reference to the connection object in your code. If you try to use the connection, you will get a StaleConnectionException. However, having this reference does not affect the connection resources.

Why aren't you closing the PreparedStatement too?

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subject: closing the database connection