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Mybatis中报错：attempted to return null from a method with a primitive return type (int)

Java新建Maven项目学习Spring注解开发显示：Unsupported class file major version 60

Springboot运行报错： "status": 404, "error": "Not Found"

java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=testFindById], {ExactMatcher:fDisplayName=testFindById(com.linxuan.test.AccountServiceTest)], {LeadingIdentifierMatcher:fClassName=com.linxuan.test.AccountServiceTest,fLeadingIdentif

Caused by: org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [D:\Java\IdeaProjects\ssm\springmvc01\target\classes\com\linxuan\controller\Use

从MP的依赖关系可以看出，通过依赖传递已经将MyBatis与MyBatis整合Spring的jar包导入，我们不需要额外在添加MyBatis的相关jar包。我们这个项目使用的SpringBoot版本是3.0.2，如果不使用MP3.5.3及以上，使用的是3.4.1。MP官网：https://mp.baomidou.com/。手动导入Druid和MyBatisPlus依赖。