日志

Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/core/metrics/ApplicationStartup
	at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:253)
	at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:266)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332)
	at com.qiu.fragment.GoodsApplication.main(GoodsApplication.java:15)
Caused by: java.lang.ClassNotFoundException: org.springframework.core.metrics.ApplicationStartup
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 5 more

网上查找原因说是springboot依赖版本太高，当时我的springboot版本是2.5.0

解决

更换低版本的springboot依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.1.6.RELEASE</version>
</dependency>

重新加载一下Maven依赖，然后重启项目，发现启动成功