GetConnection (); in java-mysql returns a strange Connection.

! The following figure shows the ((img.ask.csdn.netupload201508021420.19862_473139.png) returned Connection object .! Refer Image description (img.ask.csdn.netupload201508021420.19958_18223.png) if I am directly in the class where publicstaticConnectiongetConnection () is located. Main method, and in publicvoidadd (User... mysqljava

This is my Connection object.

If I am directly in the class where public static Connection getConnection () is located. Main method, and
In the public void add (User user) {class main method, test () is called directly. every time you run the command, the same object com. mysql. jdbc. JDBC4Connection @ 446cdf90 is always returned to me ..
If multiple indirect class calls call new LoginFrame (); -- "new UserDAOJDBCImpl (). test (); then give me random Connection objects .. It's hard to understand ..