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();
    }
}