Linux 上で Java を使用してデータベース操作をスクリプト化する方法

import java.sql.*;

public class DatabaseScript {
    // 定义数据库连接参数
    private static final String DB_URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String USER = "username";
    private static final String PASSWORD = "password";

    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        try {
            // 创建数据库连接
            conn = DriverManager.getConnection(DB_URL, USER, PASSWORD);

            // 创建Statement对象
            stmt = conn.createStatement();

            // 执行SQL语句
            String sql = "SELECT * FROM mytable";
            ResultSet rs = stmt.executeQuery(sql);

            // 处理查询结果
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                int age = rs.getInt("age");
                System.out.println("id: " + id + ", name: " + name + ", age: " + age);
            }

            // 关闭查询结果集，Statement和连接
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException se) {
            se.printStackTrace();
        } finally {
            // 关闭Statement和连接
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException se2) {
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }
        }
    }
}