applicat.yml

spring:datasource:username: rootpassword:url: jdbc:mysql://localhost:3306/test?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTCdriver-class-name: com.mysql.cj.jdbc.Driver

test文件夹下测试文件

package com.kj.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 SpringBoot01DataJdbcApplicationTests {@AutowiredDataSource dataSource;@Testvoid contextLoads() throws SQLException {System.out.println(dataSource.getClass());Connection connection = dataSource.getConnection();System.out.println(connection);connection.close();}}