在 Spring MVC 中使用@Controller、@Service 和@Inject

Question

我有一个工作控制器，它有一项服务，如下所示。

@Controller
public class FileController 
{
   private FileService   fileService;       // service injected by Spring

   /**
    * constructor which initializes the file service.
    * @param fileService     service used to retrieve a list of files
    */
   @Inject
   public FileController(FileService fileService)
   {
      this.fileService = fileService;
   }

   ...
}

同样，我有另一个服务，我也在另一个控制器中工作和使用它。

@Controller
public class SearchController 
{
   private SearchService searchService;       // service injected by  Spring

   /**
    * constructor which initializes the search service.
    * @param searchService     service used to search for items
    */
   @Inject
   public SearchController(SearchService searchService)
   {
      this.searchService = searchService;
   }

   ...
}

服务和控制器都工作正常。

然后在开发的过程中，发现FileController也需要搜索服务，所以我修改了FileController，如下所示。

@Controller
public class FilesController
{
   // data members
   private FileService   fileService;       // service injected by Spring
   private SearchService searchService;     // service injected by Spring

   /**
    * constructor which initializes the file service.
    * @param fileService     service used to retrieve a list of files
    * @param searchService   service used to retrieve a list of items.
    */
   @Inject
   public FilesController(FileService fileService, SearchService searchService)
   {
      this.fileService   = fileService;
      this.searchService = searchService;
   }
   ...
}

编译和部署都很好，但是当我访问使用 FileController 的视图时，它爆炸并出现 Spring 错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'filesController' defined in file [C:\rw_apps\tomcat.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\controller\FilesController.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [com.rockwell_collins.webquery.service.SearchService]: : Error creating bean with name 'searchService' defined in file [C:\rw_apps\tomcat.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\service\SearchService.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'searchService' defined in file [C:\rw_apps\tomcat.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\service\SearchService.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError

是否Spring只能将一项服务注入控制器？我已经尝试在我的 spring xml 文件中指定 "default-autowire" 并尝试了所有可能的值，但没有任何效果。

Answer 1

您的 SearchService 是什么样子的？你那里有一些 static 块吗？

ExceptionInInitializerError '表示在静态初始化程序中发生意外异常'

在 Spring MVC 中使用@Controller、@Service 和@Inject

using @Controller, @Service, and @Inject in Spring MVC

java

spring

tomcat

spring-mvc