javaweb连接mysql数据库

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

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

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

            // 建立连接
            Connection connection = DriverManager.getConnection(url, user, password);

            // 创建 Statement 对象
            Statement statement = connection.createStatement();

            // 执行 SQL 查询
            String sql = "SELECT * FROM users";
            ResultSet resultSet = statement.executeQuery(sql);

            // 处理查询结果
            while (resultSet.next()) {
                System.out.println("ID: " + resultSet.getInt("id") + ", Name: " + resultSet.getString("name"));
            }

            // 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}