idea项目连接mysql数据库连接

<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>8.0.26</version>
</dependency>

spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

import java.sql.*;

public class DatabaseConnectionExample {
    public static void main(String[] args) {
        // 数据库连接相关信息
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "123456";
        
        // 加载数据库驱动
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 建立数据库连接
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 执行SQL查询
            String sql = "SELECT * FROM users";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(sql);
            
            // 处理查询结果
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                String email = resultSet.getString("email");
                
                System.out.println("ID: " + id + ", Name: " + name + ", Email: " + email);
            }
            
            // 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }
}