关于Springboot调错篇

遇到两次了，第一次很快解决了，花了15分钟；第二次花了半个多小时！

遇到两次了，第一次很快解决了，花了15分钟；第二次花了半个多小时！

所以，具体描述一下，以备记录，后期不要再被卡半个小时了。首先看看效果。

控制台不停在告警，随便粘贴几条看看：

2017-06-06 17:46:10.242  WARN 6524 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Bean creation exception on FactoryBean type check: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'monthReportMapper' defined in file [F:\springboot-mybatis-master\springboot-mybatis-master\target\classes\com\droi\monthReport\mapper\MonthReportMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory': : Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO); nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO)

2017-06-06 17:46:10.254  WARN 6524 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Bean creation exception on FactoryBean type check: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'droiActiveMapper' defined in file [F:\springboot-mybatis-master\springboot-mybatis-master\target\classes\com\droi\droiActive\mapper\DroiActiveMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory': : Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO); nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO)

2017-06-06 17:46:10.266  WARN 6524 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Bean creation exception on FactoryBean type check: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'droiActiveMapper' defined in file [F:\springboot-mybatis-master\springboot-mybatis-master\target\classes\com\droi\droiActive\mapper\DroiActiveMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory': : Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO); nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO)

提示无法找到这个bean，那么，仔细看一下console报错日志，提示：

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粘贴出来看一下：

lSessionFactory': : Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO); nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactoryBean' defined in com.droi.Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactoryBean' threw exception; nested exception is java.lang.NoClassDefFoundError: com/droi/droiActive/model/droiActiveVO (wrong name: com/droi/droiActive/model/DroiActiveVO) 

原来原因是：无法实例化

由于找不到定义的实体类，那么我们跟着这个报错去看看一看mapper接口：

 

​可以看到mapper的映射方法名，那么去找mybatis的sql-map配置文件去看看，粘贴出来：

发现了！

 

​开心的启动了，我曹，怎么还是这样啊，还是不停的打日志，好难受、不舒服。

赶紧接着找原因，然后打了自己一巴掌，傻兮兮的，人家都告诉你了，实体类找不到，没有办法实例化你这个实体类，结果，哎，默默的看向了引用实体类，附上截图：

 

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哎，又是大小写，很难受啊。改好之后，接着启动，fuck，报错继续：

 

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日志，分析一下哈：

2017-06-06 18:01:32.176  WARN 5208 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'droiActiveController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.droi.droiActive.service.DroiActiveService com.droi.droiActive.controller.DroiActiveController.droiActiveService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.droi.droiActive.service.DroiActiveService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

在context初始化的时候失败，建议：取消刷新尝试。而且明确告诉了我们是哪一个controller出的问题， droiActiveController，原因是： Injection of autowired dependencies failed

并且，

No qualifying bean of type [com.droi.droiActive.service.DroiActiveService] found for dependency 

很显然，注入注解失败，那就去controller看看吧。

很显然我声明了这个呀

 

​怎么回事，换了一种方式，继续，

 

​这两种方式都是告诉spring去寻找bean的注入，那么，启动依然报错，那么问题只可能出现在这里了，service层。

请看：

 

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这不：

 

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service层需要注解service：

 

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都是坑啊，我在也不自己敲了，能ctrl c + Ctrl v 就别自己闲着自己敲。（今天给同事培训，写demo没办法啊，总不能一句不敲吧）

给看下成功的日志吧：

 

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SpringBoot Start Success!Dazhuang is so happy!~@^_^@~

看到没！很happy！

 

​浏览器验证一下是否开发完毕，查询所得数据，希望不要在报错了，结果：

 

​么有数据，很难受，我的天，没办法，接着找错：

去navicat校验sql发现没问题，是由数据的，

 

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那应该就是变量的map没传到mabatis的映射吧，去瞅瞅：

我靠，连断点都不进了，很尴尬。

然后我气愤的重启了，就又有数据了，原来是之前改动了，没有重启，很气愤：

 

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完美！

渐渐的，自己搭的框架越来越成熟了。

向着架构师的道路继续前进！