java连接mysql数据库的代码

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

public class MySQLConnector {
    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 加载MySQL驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 创建数据库连接
            String url = "jdbc:mysql://localhost:3306/mydatabase";  // 数据库地址和名称
            String username = "root";  // 数据库用户名
            String password = "password";  // 数据库密码
            connection = DriverManager.getConnection(url, username, password);
            
            // 创建Statement对象，用于执行SQL语句
            statement = connection.createStatement();
            
            // 执行查询语句
            String query = "SELECT * FROM mytable";  // 查询语句
            resultSet = statement.executeQuery(query);
            
            // 处理查询结果
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                System.out.println("id: " + id + ", name: " + name);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接和释放资源
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}