https://www.it610.com/article/1295998852888862720.htm
springboot 单元测试启动时报错，抛出如下异常：
java.lang.NoClassDefFoundError: org/springframework/core/annotation/MergedAnnotations$SearchStrategy 无法加载到注解包，后来怀疑是测试依赖引错了
原来的依赖是
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.2.1.RELEASE</version> </dependency> 这是spring框架的单元自测依赖，不适用springboot的单元自测，将依赖改成如下依赖即可：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> </dependency>