关于spring boot使用 jdbc+mysql 连接的问题

spring:

   datasource:

     username: root

     password: 123456

#    针对mysql8版本以上的驱动包，需要指定时区

     url: jdbc:mysql: //127.0.0.1:3306/jdbc?serverTimezong=GMT%2B8

     #    针对mysql8版本以上的驱动包，需要指定新的驱动类

     driver- class -name: com.mysql.cj.jdbc.Driver

package com.cc.springboot;

import org.junit.jupiter.api.Test;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.test.context.SpringBootTest;

import javax.sql.DataSource;

import java.sql.Connection;

import java.sql.SQLException;

@SpringBootTest

class Springboot08DataJdbcApplicationTests {

     @Autowired

     DataSource dataSource;

     @Test

     void contextLoads() throws SQLException {

         System.out.println( "dataSource:" +dataSource.getClass());

         Connection connection = dataSource.getConnection();

         System.out.println(connection);

         connection.close();

     }

}