How to close a JDBC database connection?

After connecting to the database using JDBC, it is necessary to manually close the database connection. This can be done by calling the `close()` method to close the database connection. The specific steps are as follows: 1. Create a `Connection` object to establish a connection with the database. 2. After completing database operations, call the `close()` method of the `Connection` object to close the database connection. Here is an example code:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class CloseConnectionExample {
    public static void main(String[] args) {
        Connection conn = null;
        try {
            // 创建数据库连接
            conn = DriverManager.getConnection(“jdbc:mysql://localhost:3306/mydatabase”,
             “username”, “password”);
            // 执行数据库操作
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                try {
                    // 关闭数据库连接
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

In the example above, the method conn.close() is called in the finally block to ensure that the database connection is properly closed regardless of whether an exception occurs.