コントローラーでサービスを自動配線するのに問題があります。私はこのエラーを持っています:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private es.unican.meteo.service.UserService es.unican.meteo.controller.MyController.userService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [es.unican.meteo.service.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
userService が登録されていないようで、コントローラーは Bean を取得できません。テストで動作するため、構成は問題ないと思いました。テストでは、これがあります：
ClassPathXmlApplicationContext("/WEB-INF/app-config.xml");
ApplicationContext.xml から Bean を取得できます
私のパッケージ構造は次のとおりです。
es.unican.meteo.controller
|---- MyController.java
es.unican.meteo.service
|---- UserService.java
es.unican.meteo.service.impl
|---- UserServiceImpl.java
.....
ウェブコンテンツ/WEB-INF
|---- MyDispatcherServlet-servlet.xml
|---- app-config.xml
|---- web.xml
.....
クラス:
== UserServiceImpl.java ==
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;
public void setUserMapper(UserMapper userMapper) {
this.userMapper = userMapper;
}
== MyController.java ==
@Controller
public class MyController {
@Autowired
private UserService userService;
@RequestMapping(method=RequestMethod.GET, value="/home")
public String handleRequest(){
return "welcome";
}
@RequestMapping(method=RequestMethod.GET, value="/getUsers")
public @ResponseBody List<User> getUsersInJSON(){
return userService.getUsers();
}
}
== web.xml ==
<display-name>Spring MVC</display-name>
<servlet>
<servlet-name>MyDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyDispatcherServlet</servlet-name>
<url-pattern>*.go</url-pattern>
</servlet-mapping>
</web-app>
== app-config.xml ===
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<!-- Scans the classpath of this application for @Components to deploy as beans -->
<context:component-scan base-package="es.unican.meteo" />
<!-- Configures the @Controller programming model -->
<mvc:annotation-driven/>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="org.apache.derby.jdbc.EmbeddedDriver"
p:url="jdbc:derby:C:\tools\derbydb"
p:connectionProperties=""
p:username="APP"
p:password="" />
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="/mybatis-config.xml" />
</bean>
<bean id="usersMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="es.unican.meteo.dao.UserMapper" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="rolesMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="es.unican.meteo.dao.RoleMapper" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
</beans>
== MyDispatcherServlet.xml ==
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<!-- Enabling Spring beans auto-discovery -->
<context:component-scan base-package="es.unican.meteo.controller" />
<!-- Enabling Spring MVC configuration through annotations -->
<mvc:annotation-driven />
<!-- Defining which view resolver to use -->
<bean class= "org.springframework.web.servlet.view.InternalResourceViewResolver" >
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
Spring mvc ロガー トレース:
19:38:54,119 DEBUG http-8080-1 support.DefaultListableBeanFactory:430 - Creating instance of bean 'myController'
19:38:54,170 DEBUG http-8080-1 annotation.InjectionMetadata:60 - Found injected element on class [es.unican.meteo.controller.MyController]: AutowiredFieldElement for private es.unican.meteo.service.UserService es.unican.meteo.controller.MyController.userService
19:38:54,174 DEBUG http-8080-1 support.DefaultListableBeanFactory:504 - Eagerly caching bean 'myController' to allow for resolving potential circular references
19:38:54,206 DEBUG http-8080-1 annotation.InjectionMetadata:85 - Processing injected method of bean 'myController': AutowiredFieldElement for private es.unican.meteo.service.UserService es.unican.meteo.controller.MyController.userService
19:38:54,224 DEBUG http-8080-1 support.DefaultListableBeanFactory:217 - Creating shared instance of singleton bean 'userServiceImpl'
19:38:54,226 DEBUG http-8080-1 support.DefaultListableBeanFactory:430 - Creating instance of bean 'userServiceImpl'
19:38:54,234 DEBUG http-8080-1 annotation.InjectionMetadata:60 - Found injected element on class [es.unican.meteo.service.impl.UserServiceImpl]: AutowiredFieldElement for private es.unican.meteo.dao.UserMapper es.unican.meteo.service.impl.UserServiceImpl.userMapper
19:38:54,237 DEBUG http-8080-1 support.DefaultListableBeanFactory:504 - Eagerly caching bean 'userServiceImpl' to allow for resolving potential circular references
19:38:54,256 DEBUG http-8080-1 annotation.InjectionMetadata:85 - Processing injected method of bean 'userServiceImpl': AutowiredFieldElement for private es.unican.meteo.dao.UserMapper es.unican.meteo.service.impl.UserServiceImpl.userMapper
19:38:54,268 INFO http-8080-1 support.DefaultListableBeanFactory:433 - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@56088b29: defining beans [myController,roleService,userServiceImpl,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.view.InternalResourceViewResolver#0,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
19:38:54,279 ERROR http-8080-1 servlet.DispatcherServlet:457 - Context initialization failed
このトピックに関するいくつかの質問を確認しましたが、問題の解決策が見つかりません。多分私は何かをスキップしていますが、確かにわかりません。コンポーネントスキャンを変更しようとしましたが、結果はありませんでした。
/SPRING-MVC/getUsers.go にアクセスしようとすると、これらのエラーが表示されます。
Bean を app-config (applicationContext) に配置する必要があるのか、それとも servlet.xml に配置する必要があるのかは、少しわかりにくいのでわかりません...
ありがとうございました