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背景描述
在springboot整合mybatis的時候，啓動的時候會報出如下的錯誤：（關鍵信息）
Invocation of init method failed; nested exception is java.lang.IllegalArgumentException:
Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
下面還會報出：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.annotation.ProxyCachingConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.annotation.ProxyCachingConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available
...
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available
網上搜索該問題大部分都是指向pom中對mybatis依賴的引用錯誤問題，或者是mapper掃描，數據源配置，下面推薦幾個可以查看：
https://www.cnblogs.com/Lints/p/11298549.html
http://chengxudaren.com/blog/article/show/id/239.html
但是按照其正確配置操作後，仍然沒有解決上述報錯。
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問題解決
在pom中加入 druid 數據庫連接池的依賴，如下：
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>
重啓項目，問題解決。
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原因分析
emmmm……尚待探索。感覺是這是一種投機的解決方式，待研究，待解疑。