在springboot整合mybatis-plus的时候，出现了这样的一个问题
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file
[E:\code\IDEA code\mybatis_plus\target\classes\com\muyu\MybatisPlusApplication.class]; nested
exception is
java.lang.annotation.AnnotationFormatError: Invalid default: public abstract java.lang.Class
org.mybatis.spring.annotation.MapperScan.factoryBean()
at
org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.scanCandidateComponents(Cl
assPathScanningCandidateComponentProvider.java:452)
经过排查以及网上查询之后发现应该是springboot和mybatis-plus的版本不兼容，将两者的版本分别如下修改，即可解决。

 <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>2.2.5.RELEASE</version>
     <relativePath/>
 </parent>
 <dependencies>
	 <dependency>
	     <groupId>com.baomidou</groupId>
	     <artifactId>mybatis-plus-boot-starter</artifactId>
	     <version>3.0.5</version>
	 </dependency>
 </dependencies>

spring.datasource.url=jdbc:mysql://localhost:3306/fx?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT