idea连接mysql数据库查询

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/your_database_name
    username: your_username
    password: your_password

import java.sql.*;

public class Main {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/your_database_name";
        String username = "your_username";
        String password = "your_password";

        try (Connection connection = DriverManager.getConnection(url, username, password)) {
            String sql = "SELECT * FROM your_table_name";
            try (Statement statement = connection.createStatement();
                 ResultSet resultSet = statement.executeQuery(sql)) {
                while (resultSet.next()) {
                    // 处理查询结果
                    // 例如，输出每行数据的某个列的值
                    System.out.println(resultSet.getString("column_name"));
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}