執行時報錯資訊如下：

***************************
APPLICATION FAILED TO START
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Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder$AnnotationWrapper.
 
<init>(MybatisMapperAnnotationBuilder.java:684)

The following method did not exist:

    org.apache.ibatis.annotations.Select.databaseId()Ljava/lang/String;

The method's class, org.apache.ibatis.annotations.Select, is available from the following locations:

    jar:file:/C:/Users/Administrator/.m2/repository/org/mybatis/mybatis/3.5
 
.2/mybatis-3.5.2.jar!/org/apache/ibatis/annotations/Select.class

The class hierarchy was loaded from the following locations:

    org.apache.ibatis.annotations.Select: file:/C:/Users/Administrator/.m2/repository/org/mybatis/mybatis/3.5.2/mybatis-3.5.2.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of org.apache.ibatis.annotations.Select

 
2021-06-28 08:37:47.099 ERROR 3324 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@68c9133c] to prepare test instance [com.ecolor.energy.service.impl.ReportServiceImplTest@75ad30c1]

java.lang.IllegalStateException: Failed to load ApplicationContext

當時就很懵逼，org.apache.ibatis.annotions.Select 這個包是有的啊，也可以點進去

隨網上找了一下基本上沒人遇到這個問題

最後折騰了一兩天後 發現居然是 maven包衝突導致的，原因是 mybatis-plus 自帶 mybatis 所以不需要再引入mybatis依賴

解決方法：

刪除 自專案中 mybatis 依賴即可

相關 mybatis 的配置 也可以通過 mybatis-plus 進行配置