Penginjeksian ketergantungan kabel otomatis gagal; pengecualian bersarang adalah org.springframework.beans.factory.BeanCreationException:

Saya mencoba membuat contoh dari transaksi pegas dengan Apache Tomcat dan postgresql tetapi mendapatkan kesalahan Injeksi ketergantungan kabel otomatis gagal

Pengecualian

javax.servlet.ServletException: Servlet.init() for servlet dispatcher threw exception
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:724)

root cause

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private DAO.TblUserManager_DAO Controllers.LoginController.user; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl]
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:724)

root cause

org.springframework.beans.factory.BeanCreationException: Could not autowire field: private DAO.TblUserManager_DAO Controllers.LoginController.user; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl]
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:506)
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:724)

root cause

org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl]
    org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:800)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:724)

operator-servlet.xml saya

<?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:aop="http://www.springframework.org/schema/aop"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd        
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:annotation-config />
    <context:component-scan base-package="Controllers" /> 
    <context:component-scan base-package="DAO" />
    <mvc:annotation-driven />
    <tx:annotation-driven transaction-manager="transactionManager"/> 


    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp/"
          p:suffix=".jsp" />

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="org.postgresql.Driver" />
        <property name="url" value="jdbc:postgresql://localhost:5432/car" />
        <property name="username" value="----" />
        <property name="password" value="-----" />
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="annotatedClasses" >
            <list>
                <value>DAOModel.Tblusers</value>
                <value>DAOModel.Tblcars</value>
            </list>
        </property>
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="DAOModel" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <!-- <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> -->
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" >
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    <bean id = "Tblusers_DAOImpl" class="DAO.Tblusers_DAOImpl">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
   <bean id = "TblUserManager_DAOImpl" class="DAO.TblUserManager_DAOImpl">

    </bean>
</beans>

repositori, layanan, komponen saya

    @Component
    public interface Tblusers_DAO {
        public void adduser(Tblusers user);
    }


    @Repository
    public class Tblusers_DAOImpl implements Tblusers_DAO{

        @Autowired
        private SessionFactory sessionFactory;

        @Override
        public void adduser(Tblusers user) {
            this.getSessionFactory().getCurrentSession().saveOrUpdate(user);
        }


        public SessionFactory getSessionFactory() {
            return sessionFactory;
        }


        public void setSessionFactory(SessionFactory sessionFactory) {
            this.sessionFactory = sessionFactory;
        }
    }



@Component
public interface TblUserManager_DAO {
    public void adduser(Tblusers user);
}



@Service
public class TblUserManager_DAOImpl implements TblUserManager_DAO{

    @Autowired
    private TblUserManager_DAO dao;

    @Override
    @Transactional
    public void adduser(Tblusers user) {
       dao.adduser(user);
    }

    public void setDao(TblUserManager_DAO dao) {
        this.dao = dao;
    }

}

dan Pengendali

public class LoginController {

    @Autowired
    private  TblUserManager_DAO user;
    @RequestMapping(value = "/Login", method = RequestMethod.POST)
    public ModelAndView setLgin(@ModelAttribute("LoginModel") LoginModel login) {
        ModelAndView model = new ModelAndView();
        Tblusers user2=new Tblusers();
        user2.setTblusersId(3);
        user2.setTblusersFamily(login.getUsername());
        user2.setTblusersPassword(login.getPassword());
        user.adduser(user2);
        model.addObject("Hello", login.getUsername());
        return model;
    }
 public void setUser(TblUserManager_DAO user) {
        this.user = user;
    }

}

spring-mvc hibernate spring-transactions
person ATJVS    schedule 15.02.2014    source sumber
comment
kemungkinan duplikat BeanCreationException di Spring Autowiring   -  person Brian Clozel    schedule 16.02.2014

Jawaban (3)


arrow_upward
3
arrow_downward

Saat Anda memindai komponen suatu kelas dengan anotasi @Component, @Repository, @Service, @Configuration, dll., Spring secara implisit membuat kacang untuk kelas tersebut. Itu juga menciptakan kacang untuk itu ketika Anda mendeklarasikannya secara eksplisit, yaitu. ini

<bean id = "Tblusers_DAOImpl" class="DAO.Tblusers_DAOImpl">
    <property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id = "TblUserManager_DAOImpl" class="DAO.TblUserManager_DAOImpl">

Jadi saat ini, Anda memiliki dua kacang untuk TblUserManager_DAOImpl dan Tblusers_DAOImpl. Spring tidak tahu harus menyuntikkan yang mana di bidang seperti itu

@Autowired
private  TblUserManager_DAO user;

karena ada dua kandidat. Hapus deklarasi <bean> atau penuhi target injeksi dengan sesuatu seperti @Qualified untuk memilih kacang yang sesuai.

Berikut dokumentasinya. Pelajarilah untuk memahami keseluruhan proses pemindaian komponen.

Seperti JB Nizet menyatakan di bawah, Anda hanya boleh memberi anotasi pada kelas implementasi sebenarnya dengan @Component atau spesialisasinya. Anggap saja secara semantik, antarmuka bukanlah komponen, tidak ada kacang yang dapat dibuat untuk sebuah antarmuka. Hanya kelas sebenarnya, yang merupakan implementasi antarmuka, yang dapat menjadi komponen.

person Sotirios Delimanolis    schedule 15.02.2014
comment
+1. Dan jangan beri anotasi pada antarmuka kacang dengan @Component. Hanya implementasinya yang harus diberi anotasi. - person JB Nizet; 15.02.2014
comment
solusi ini tidak berfungsi ketika saya menambahkan @Qualifier(user) di Controller. - person ATJVS; 15.02.2014
comment
@ATJVS Jelaskan kepada saya mengapa Anda memenuhi syarat dengan nilai user. Menurut Anda mengapa hal itu harus berhasil? - person Sotirios Delimanolis; 15.02.2014
comment
karena ada dua kandidat. Hapus deklarasi ‹bean› atau memenuhi syarat target injeksi dengan sesuatu seperti @Qualified. - person ATJVS; 15.02.2014
comment
@ATJVS Ya, tapi kenapa nilainya user? Ini bab tentang cara menggunakan @Qualifier dari dokumentasi. - person Sotirios Delimanolis; 15.02.2014

arrow_upward
2
arrow_downward

Daftarkan kacang Anda baik melalui entri beandefenition dalam file xml atau melalui anotasi seperti @component,@Repository,@Service.Selain itu,

<context:annotation-config/> and <context:component-scan/>

Kedua elemen ini digunakan dalam kode Anda. Anda cukup menggunakan <context:component-scan/> dengan tepat karena elemen tersebut akan melakukan hal yang sama seperti elemen lainnya dan juga untuk menghindari ambiguitas

person Magesh    schedule 12.04.2014

arrow_upward
0
arrow_downward

Setiap kali Anda menginjeksi objek apa pun, Anda harus menyediakan metode penyetel dan pengambilnya. itu akan menyelesaikan masalah Anda.

person Shivshanker Mhadiwale    schedule 14.07.2015