You didn't assign a value to this connection object conn. Look at your fetch connection without using its return value. See below:
Connection conn = DriverManager.getConnection(url, name, pwd);
0 Answer
You didn't assign a value to this connection object conn. Look at your fetch connection without using its return value. See below:
Connection conn = DriverManager.getConnection(url, name, pwd);
Thank you, I have not found before write a tool class, directly has been using the tool class. Really not found, still looking for the path problem
have the help, welcome to adopt ha ~
这家伙很懒，什么都没留下...