Springboot+Mybatis整合启动报Property sqlSessionFactory or sqlSessionTemplate are required

• 背景描述

在springboot整合mybatis的时候，启动的时候会报出如下的错误：（关键信息）

Invocation of init method failed; nested exception is java.lang.IllegalArgumentException:Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

 下面还会报出：

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

网上搜索该问题大部分都是指向pom中对mybatis依赖的引用错误问题，或者是mapper扫描，数据源配置，下面推荐几个可以查看：

https://www.cnblogs.com/Lints/p/11298549.html

http://chengxudaren.com/blog/article/show/id/239.html

但是按照其正确配置操作后，仍然没有解决上述报错。

• 问题解决

在pom中加入 druid 数据库连接池的依赖，如下：

<dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.1.9</version>
</dependency>

重启项目，问题解决。

• 原因分析

emmmm……尚待探索。感觉是这是一种投机的解决方式，待研究，待解疑。