Closing a Database Connection

After you complete required data operations in the database, close the database connection.

To close a database connection, you can directly call the close method.

// There will be security risks if the username and password used for authentication are directly written into code. It is recommended that the username and password be stored in the configuration file or environment variables (the password must be stored in ciphertext and decrypted when being used) to ensure security.
// In this example, the username and password are stored in environment variables. Before running this example, set environment variables EXAMPLE_USERNAME_ENV and EXAMPLE_PASSWORD_ENV in the local environment (set the environment variable names based on the actual situation).
String userName = System.getenv("EXAMPLE_USERNAME_ENV");
String password = System.getenv("EXAMPLE_PASSWORD_ENV");
Connection conn = DriverManager.getConnection(sourceURL, userName, password);
conn.close();