Maven 工程下的Controller cannot be resolved to a type

问题：

@Controller无法识别：Controller cannot be resolved to a type

解决办法：

web子项目pom.xml缺少Spring相关的依赖，导致项目缺少相关jar包。例如：

<properties>        
        <spring.version>4.2.4.RELEASE</spring.version>  
   </properties>  
   <!-- Spring -->  
   <dependency>  
   <groupId>org.springframework</groupId>  
   <artifactId>spring-context</artifactId>  
   <version>${spring.version}</version>  
   </dependency>  
         <dependency>  
         <groupId>org.springframework</groupId>  
         <artifactId>spring-beans</artifactId>  
              <version>${spring.version}</version>  
         </dependency>  
         <dependency>  
              <groupId>org.springframework</groupId>  
              <artifactId>spring-webmvc</artifactId>  
              <version>${spring.version}</version>  
         </dependency>  
         <dependency>  
              <groupId>org.springframework</groupId>  
              <artifactId>spring-jdbc</artifactId>  
              <version>${spring.version}</version>  
          </dependency>  
          <dependency>  
                <groupId>org.springframework</groupId>  
                <artifactId>spring-aspects</artifactId>  
                <version>${spring.version}</version>  
          </dependency>