测试tomcat mysql数据库

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DatabaseConnector {
    private static final String 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 connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;

        try {
            // 加载 JDBC 驱动
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立数据库连接
            connection = DriverManager.getConnection(URL, USER, PASSWORD);

            // 执行 SQL 查询
            String sql = "SELECT * FROM users WHERE id = ?";
            statement = connection.prepareStatement(sql);
            statement.setInt(1, 1);
            resultSet = statement.executeQuery();

            // 处理查询结果
            while (resultSet.next()) {
                System.out.println("User ID: " + resultSet.getInt("id"));
                System.out.println("User Name: " + resultSet.getString("name"));
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (resultSet != null) resultSet.close();
                if (statement != null) statement.close();
                if (connection != null) connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}