Closing Database Connections in Java

Question

I am getting a little confused, I was reading the below from http://en.wikipedia.org/wiki/Java_Database_Connectivity

Connection conn = DriverManager.getConn         


        

Answer 1

It is always better to close the database/resource objects after usage. Better to close connection, resultset and statement objects in the finally block.

Until Java7, all these resources needs to be closed using a finally block. If you are using Java 7, then for closing the resources you can do as follows.

try(Connection con = getConnection(url, username, password, "org.postgresql.Driver");
    Statement stmt = con.createStatement();
    ResultSet rs = stmt.executeQuery(sql);
) {

//statements
}catch(....){}

Now, con, stmt and rs objects become part of try block and java automatically closes these resources after use.

Hope I was helpful.