Could not open ServletContext resource [/dataSource.properties]

 这个问题刚开始会很常见，经常忘记在写路径的地方加上classpath:

比如springmvc.xml中如果不写classpath就会报如下的错：

ServletContext resource [/com/tjcu/mapper/] cannot be resolved to URL because it does not exist

web.xml:

  
    springmvc
    org.springframework.web.servlet.DispatcherServlet
    
      contextConfigLocation
      classpath:springmvc.xml
    
  

  
    springmvc
    /
  

后续如果再遇到类似的，再补充......