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2019-11-08 17:23:24.446 ERROR 215864 --- [           main] o.s.boot.SpringApplication               : Application run failedorg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rabbitOrderSender': Unsatisfied dependency expressed through field 'brokerMessageLogMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brokerMessageLogMapper' defined in file [E:\学习\java\项目学习\springboot-rabbitmq\springboot-producer\target\classes\com\sxw\springbootproducer\mapper\BrokerMessageLogMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [com/sxw/springbootproducer/config/database/MybatisDataSourceConfig.class]: 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.RuntimeException: java.io.FileNotFoundException: class path resource [com/sxw/springbootproducer/mapping/] cannot be resolved to URL because it does not exist

问题： 找不到URL指定的文件

出错位置：

这个位置找不到URL对应的文件

进一步分析，通过 

得到解决办法：

报 xml找不到。可在：springboot-produce.pom 文件内添加如下代码：    
           
                
     
      src/main/resources
             
            
                
     
      src/main/java
                 
                     
      
       **/*.properties
                      
      
       **/*.xml
                  
                 
     
      false
             
        
   

为什么这么做可以？ 

先看rescources 标签的作用 

从而得到错误原因：

由于没有配置resources 所以不会打包该路径下的文件到classpath, 然后就没有mapping这个文件夹，所以dataSource找不到URL，就报错。

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