注入自动连接依赖失败;
我正在开发一个小的Java EE Hibernate Spring应用程序，并出现一个错误：
Error creating bean with name 'articleControleur': Injection of autowired dependencies failed;
oct. 26, 2011 3:51:44 PM org.apache.catalina.core.ApplicationContext log Grave: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'articleControleur': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.bd.service.ArticleService com.bd.controleur.ArticleControleur.articleService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.bd.service.ArticleService] 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)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.bd.service.ArticleService com.bd.controleur.ArticleControleur.articleService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.bd.service.ArticleService] 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)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:502) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282) ... 33 more Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.bd.service.ArticleService] 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)} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474) ... 35 more oct. 26, 2011 3:51:44 PM org.apache.catalina.core.StandardContext loadOnStartup Grave: La servlet /ExempleAchref a généré une exception "load()" org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.bd.service.ArticleService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
这里是我的控制器ArticleControleur，其中包含恢复文章列表的function：
package com.bd.controleur; import java.util.HashMap; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bd.service.ArticleService; @Controller @RequestMapping("/Article/GererArticle") public class ArticleControleur { @Autowired ArticleService articleService; public ModelAndView listarticle() { Map<String, Object> model = new HashMap<String, Object>(); model.put("articles", articleService.getAllArticles()); // new ModelAndView("nom de la page jsp", model qui contient l'ensemble // des beans que tu vas passer a cette page) return new ModelAndView("GererArticle", model); } }
这里是我的文章服务：
package com.bd.service; import java.util.Collection; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.bd.dao.ArticleDao; import com.bd.entity.Article; @Service public class ArticleServiceImp implements ArticleService { @Autowired private ArticleDao articledao; @Override public Article getArticleById(int articleId) { // TODO Auto-generated method stub return articledao.getById(articleId); } @Override public void saveArticle(Article article) { // TODO Auto-generated method stub articledao.save(article); } @Override public void deleteArticle(Article article) { // TODO Auto-generated method stub articledao.delete(article); } @Override public List<Article> getAllArticles() { // TODO Auto-generated method stub return articledao.getAll(); } }
这里是我的应用程序的上下文：
<?xml version="1.0" encoding="UTF-8"?> <!-- - Application context containing authentication, channel - security and web URI beans. - - Only used by "filter" artifact. - --> <b:beans xmlns:b="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd "> <!-- Auto-detect components --> <context:component-scan base-package="com.bd.entity"/> </b:beans>
错误显示com.bd.service.ArticleService不是注册的bean。 添加您的应用程序上下文中将具有自动assemblybean的软件包：
<context:component-scan base-package="com.bd.service"/> <context:component-scan base-package="com.bd.controleur"/>
另外，如果你想在com.bd包含所有的子包：
<context:component-scan base-package="com.bd"> <context:include-filter type="aspectj" expression="com.bd.*" /> </context:component-scan>
另外，如果您使用的是Spring 3.1或更高版本，则可以利用@ComponentScan注释，从而不必使用任何有关组件扫描的xmlconfiguration。 与@Configuration一起使用它。
@Controller @RequestMapping("/Article/GererArticle") @Configuration @ComponentScan("com.bd.service") // No need to include component-scan in xml public class ArticleControleur { @Autowired ArticleService articleService; ... }
你可能会发现这个春季深入自动assembly部分有用。
你的上下文文件中有一个标识为“articleService”的bean吗？ 我相信自动assembly匹配您的上下文文件中的一个bean的id与您试图Autowire的variables名称。
public class Organization { @Id @Column(name="org_id") @GeneratedValue private int id; @Column(name="org_name") private String name; @Column(name="org_office_address1") private String address1; @Column(name="org_office_addres2") private String address2; @Column(name="city") private String city; @Column(name="state") private String state; @Column(name="country") private String country; @JsonIgnore @OneToOne @JoinColumn(name="pkg_id") private int pkgId; public int getPkgId() { return pkgId; } public void setPkgId(int pkgId) { this.pkgId = pkgId; } public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } @Column(name="pincode") private String pincode; @OneToMany(mappedBy = "organization", cascade=CascadeType.ALL, fetch = FetchType.EAGER) private Set<OrganizationBranch> organizationBranch = new HashSet<OrganizationBranch>(0); @Column(name="status") private String status = "ACTIVE"; @Column(name="project_id") private int redmineProjectId; public int getRedmineProjectId() { return redmineProjectId; } public void setRedmineProjectId(int redmineProjectId) { this.redmineProjectId = redmineProjectId; } public String getStatus() { return status; } public void setStatus(String status) { this.status = status; } public Set<OrganizationBranch> getOrganizationBranch() { return organizationBranch; } public void setOrganizationBranch(Set<OrganizationBranch> organizationBranch) { this.organizationBranch = organizationBranch; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress1() { return address1; } public void setAddress1(String address1) { this.address1 = address1; } public String getAddress2() { return address2; } public void setAddress2(String address2) { this.address2 = address2; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getState() { return state; } public void setState(String state) { this.state = state; } public String getPincode() { return pincode; } public void setPincode(String pincode) { this.pincode = pincode; } }
您可以将change datatype int中的private int pkgId行更改为原始类名称，也可以添加注释@autowired
