新建springboot项目

1.新建springboot项目，详情查看使用IDEA搭建一个简单的SpringBoot项目——详细过程_君当自强-CSDN博客_springboot项目搭建

2.搭建过程中遇到的问题如下：

@RunWith(SpringRunner.class)
@MapperScan("com.example.test")
@ComponentScan(value = "com.example.test.serviceImpl")
@SpringBootTest(classes= DemoApplication.class)
public class TestApplicationTests 
springboot测试启动类不加@RunWith(SpringRunner.class)，service注入不进去
不加MapperScan包扫描不到

@SpringBootApplication @MapperScan("com.example.test.mapper") 
public class DemoApplication 
启动类目录位置需要高于controller，不然扫描不到controller

spring:
  datasource:
    name: mysql
    url: jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: root
    password: 123
    driver-class-name: com.mysql.jdbc.Driver
    
    

    URL上不加serverTimezone  
报错  The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. 

springboot内置tomcat端口为8080，访问路径为localhost:8080