java 获取mysql毫秒数

import java.sql.*;
import java.util.Date;

public class MySQLTimestampExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            String sql = "SELECT timestamp_column FROM my_table WHERE id = ?";
            try (PreparedStatement pstmt = conn.prepareStatement(sql)) {
                pstmt.setInt(1, 1); // 假设我们要查询id为1的记录
                try (ResultSet rs = pstmt.executeQuery()) {
                    if (rs.next()) {
                        Timestamp timestamp = rs.getTimestamp("timestamp_column");
                        long millis = timestamp.getTime();
                        System.out.println("Timestamp in milliseconds: " + millis);
                    }
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}