@Autowired創建名爲bean的bean時出錯

我無法使用@Autowired，因爲運行項目後出現錯誤。在錯誤寫Error creating bean with name 'pupilServiceImpl'，但我不同意這個名稱創建豆@Autowired創建名爲bean的bean時出錯

堆棧跟蹤tomcat的日誌

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private service.implement.PupilServiceImpl controller.PupilController.pupilServiceImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dao.implement.PupilDAOImpl service.implement.PupilServiceImpl.pupilDAOImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilDAOImpl' defined in file [/opt/tomcat/apache-tomcat-8.0.24/webapps/ROOT/WEB-INF/classes/dao/implement/PupilDAOImpl.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError 

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private service.implement.PupilServiceImpl controller.PupilController.pupilServiceImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dao.implement.PupilDAOImpl service.implement.PupilServiceImpl.pupilDAOImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilDAOImpl' defined in file [/opt/tomcat/apache-tomcat-8.0.24/webapps/ROOT/WEB-INF/classes/dao/implement/PupilDAOImpl.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError 
    at ... 
    ... 58 more 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dao.implement.PupilDAOImpl service.implement.PupilServiceImpl.pupilDAOImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pupilDAOImpl' defined in file [/opt/tomcat/apache-tomcat-8.0.24/webapps/ROOT/WEB-INF/classes/dao/implement/PupilDAOImpl.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError 
    ... 
    ... 73 more 
Caused by: java.lang.ExceptionInInitializerError 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422) 
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098) 
    ... 84 more 
Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [org.postgresql.Driver] 
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:245) 
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.loadDriverIfPossible(DriverManagerConnectionProviderImpl.java:200) 
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildCreator(DriverManagerConnectionProviderImpl.java:156) 
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:95) 
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94) 
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) 
    at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930) 
    at dao.implement.PupilDAOImpl.<clinit>(PupilDAOImpl.java:20) 
    ... 91 more 
Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.postgresql.Driver 
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.findClass(ClassLoaderServiceImpl.java:230) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:348) 
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:242) 
    ... 106 more

控制器

@RestController 
public class PupilController { 

    @Autowired 
    private PupilServiceImpl pupilService; 

    public void setPupilService(PupilServiceImpl pupilService) { 
     this.pupilService = pupilService; 
    } 

    public PupilController(){ 
    } 
    ... 
}

服務類

@Service 
public class PupilServiceImpl implements PupilService { 

    @Autowired 
    private PupilDAOImpl pupilDAO; 

    public PupilServiceImpl() { 
    } 

    public void setPupilDAO(PupilDAOImpl pupilDAO) { 
     this.pupilDAO = pupilDAO; 
    } 
    ... 
}

爲spring-servlet.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:p="http://www.springframework.org/schema/p" 
     xmlns:context="http://www.springframework.org/schema/context" 
     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.xsd"> 

    <context:component-scan base-package="controller"/> 
    <context:component-scan base-package="dao.implement"/> 
    <context:component-scan base-package="service.implement"/> 
    <context:annotation-config/> 

    <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> 

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="prefix" value="/WEB-INF/jsp/" /> 
     <property name="suffix" value=".jsp" /> 
    </bean> 

    <bean id="pupilService" class="service.implement.PupilServiceImpl" autowire="byName"/> 

    <bean id="pupilDAO" class="dao.implement.PupilDAOImpl" autowire="byName"/> 
</beans>

的web.xml

<web-app id="WebApp_ID" version="2.4" 
     xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 

    <display-name>Archetype Created Web Application</display-name> 
    <welcome-file-list> 
     <welcome-file>/WEB-INF/jsp/index.jsp</welcome-file> 
    </welcome-file-list> 
    <servlet> 
     <servlet-name>spring</servlet-name> 
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>spring</servlet-name> 
     <url-pattern>/</url-pattern> 
    </servlet-mapping> 
    <context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>/WEB-INF/spring-servlet.xml</param-value> 
    </context-param> 
    <listener> 
     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
    </listener> 
</web-app>

如果我創建classpathxmlcontext我有新的錯誤

public PupilController(){ 
    ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml"); 
    TEstst tEstst = (TEstst)context.getBean("tEstst"); 
    tEstst.print(); 
    System.out.println("hello"); 
}

堆棧跟蹤

SEVERE [RMI TCP Connection(2)-127.0.0.1] org.springframework.web.context.ContextLoader.initWebApplicationContext Context initialization failed 
java.lang.NoClassDefFoundError: org.springframework.beans.FatalBeanException

來源

2015-08-28 Bohdan Olehovich

'無法加載請求的類：org.postgresql.Driver'你有Postgresql驅動程序嗎？ –

問題似乎與你的持久性有關。你在使用數據源嗎？它是如何配置的？ –

我沒有添加postgres的依賴 –

看來你是通過組件掃描創建Spring Beans，並在spring-servlet.xml中聲明它們。

您應該只執行其中一個。

另外，看起來你的DAO需要一個DataSource，它需要一個PostgreSQL的驅動程序。

來源

2015-08-28 08:37:07 morsor

@Autowired創建名爲bean的bean時出錯

回答

相關問題