(ContextLoader.java:307) - Context initialization failed

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本文解决了在Eclipse中使用Tomcat启动项目时出现的ContextInitializationFailed错误，及一系列bean创建失败的问题，指出问题源于hosts文件未正确配置，并提供了解决方案。

错误现象：在eclipse加载tomcat服务器启动项目时总是报[smsAPP][-][ERROR] (ContextLoader.java:307) - 2019-01-22 09:35:13,575 Context initialization failed的问题，由此引发的一系列创建bean的错误，如：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService' defined in class path resource [spring/ApplicationContext-service.xml]: Cannot resolve reference to bean 'userMapper' while setting bean property 'userMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void org.mybatis.spring.mapper.MapperFactoryBean.setSqlSessionTemplate(org.mybatis.spring.SqlSessionTemplate); nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSession' defined in class path resource [spring/ApplicationContext.xml]: Cannot resolve reference to bean 'sqlSessionFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/ApplicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class cn.com.app.util.Tools 等等

解决问题的方法：

网上找了相关的答案作参考，什么配置文件参数有问题，什么tomcat环境变量没有配置等等，其实根本就不需要配置tomcat的环境变量。最后我发现问题并不是这些原因导致的，而是我们在C盘下的hosts文件没有配置，更新hosts文件就好了。