[英]Spring No matching bean of type … found for dependency: expected at least 1 bean
我在匹配bean時遇到麻煩。 我的項目基於“ Spring in action”中的項目
No matching bean of type [com.kmazur.data.BoardRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'boardController' defined in file [C:\Users\lenovo\Documents\workspace-sts-3.8.4.RELEASE\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\MVCWebApi\WEB-INF\classes\com\kmazur\web\BoardController.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.kmazur.data.BoardRepository]: : No matching bean of type [com.kmazur.data.BoardRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.kmazur.data.BoardRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
和servlet-context.xml
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="com.kmazur.*" />
web.xml中
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
類
public interface BoardRepository {
List<Board> findUsers(long max, int count);
Board findOne(long boardId);
}
和
public class Board {
private final Long id;
private final String message;
private final Date time;
private Double latitude;
private Double longitude;
調節器
@Controller
@RequestMapping("/boards")
public class BoardController {
private static final String MAX_LONG_AS_STRING = "9223372036854775807";
private BoardRepository boardRepository;
@Autowired
public BoardController(BoardRepository boardRepository) {
this.boardRepository = boardRepository;
}
我已經嘗試過以不同的方式添加注釋,但是錯誤始終是相同的。
我將回購更改為:
public interface BoardRepository extends JpaRepository<Board,Long>{
//Methods here
}
並注釋聲明:
@Autowired
private BoardRepository boardRepository;
並讓Spring知道在哪里看:
<jpa:repositories base-package="com.repositories" />
(如果BoardRepository是在com.repositories包中定義的)
我還沒有讀過這本書,但是例如 ,它看起來像是春季數據。 他們還創建界面而無需實際操作。
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