org.springframework.beans.factory.BeanCreationException：创建名为'homeController'的bean时出错：注入自动连接的依赖项失败;

时间：2015-05-26 08:50:11

标签： java spring jsp model-view-controller annotations

我是春季MVC的新手。我正在编写CRUD Spring MVC应用程序来了解spring MVC的流程。 我收到错误org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController': Injection of autowired dependencies failed。

我搜索了此错误的解决方案但无法找到确切的解决方案。 stackoverflow上有多个问题。但我真的无法理解这个错误的原因是什么，我该如何修复它。

堆栈跟踪 

   org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.varun.contact.dao.ContactDao com.varun.contact.controller.HomeController.contactDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.varun.contact.dao.ContactDao] 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:287)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
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:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3910)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4393)
at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:310)
at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142)
at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461)
at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)
at org.jboss.web.deployers.WebModule.start(WebModule.java:97)
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.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)
at com.sun.proxy.$Proxy39.start(Unknown Source)
at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)
at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)
at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
at org.jboss.system.ServiceController.start(ServiceController.java:460)
at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163)
at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99)
at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46)
at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:362)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.varun.contact.dao.ContactDao com.varun.contact.controller.HomeController.contactDao; nested exc
14:25:39,988 INFO  [STDOUT] eption is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.varun.contact.dao.ContactDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:506)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
... 75 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.varun.contact.dao.ContactDao] 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:924)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:793)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
... 77 more

Contact.java 

public class Contact {
	private int id;
	private String name;
	private String email;
	private String address;
	private String telephone;

// Default Constructor
// Parameterized Constructor

//Getters and setters
  	}

的ContactDAO 

public interface ContactDao {
	
	public void saveOrUpdate(Contact contact);
	public void delete(int contactId);
	public Contact get(int contactId);
	public List<Contact> list();
}

ContactDaoImpl 

public class ContactDAOImpl implements ContactDao {
	
	private JdbcTemplate jdbcTemplate;
	
	
	 public ContactDAOImpl(javax.activation.DataSource dataSource) {
	      jdbcTemplate = new JdbcTemplate((DataSource) dataSource);
		 
	    }
 	//Insert or update a new contact: 
	@Override
	public void saveOrUpdate(Contact contact) {
		if(contact.getId()>0){
			//Update
			String sql="UPDATE CONTACT SET name=?,email=?,address=?,"
			+"telephone=? where contact_id=?";
			System.out.println("I am inside ContactDAOImpl : save or saveOrUpdate------------------------------------------------");
			jdbcTemplate.update(sql,contact.getName(),contact.getEmail(),contact.getAddress(),
					contact.getTelephone(),contact.getId());
		}
		else{
			// Insert
			String sql="INSERT INTO CONTACT(name,email,address,telephone)"
					+"VALUES(?,?,?,?)";
			jdbcTemplate.update(sql,contact.getName(),contact.getEmail(),contact.getAddress(),
					contact.getTelephone());
		}
		
	}

	
	//Delete a contact:
	@Override
	public void delete(int contactId) {
	String sql="DELETE FROM CONTACT where contact_id=?";
	System.out.println("I am inside ContactDAOImpl : save or delete -----------------------------------------------------------");
	jdbcTemplate.update(sql,contactId);
		
	}

	//Get a particular contact:
	@Override
	public Contact get(int contactId) {
	
		String sql="SELECT * FROM CONTACT WHERE contact_id="+contactId;
		 return jdbcTemplate.query(sql, new ResultSetExtractor<Contact>() {
			 
		        @Override
		        public Contact extractData(ResultSet rs) throws SQLException,
		                DataAccessException {
		            if (rs.next()) {
		                Contact contact = new Contact();
		                contact.setId(rs.getInt("contact_id"));
		                contact.setName(rs.getString("name"));
		                contact.setEmail(rs.getString("email"));
		                contact.setAddress(rs.getString("address"));
		                contact.setTelephone(rs.getString("telephone"));
		                return contact;
		            }
		 
		            return null;
		        }
		 
		    });
	}
	
	//List all contact:
	@Override
	public List<Contact> list() {
		String sql = "SELECT * FROM contact";
		 System.out.println("I am inside List contact-------------------------- ");
	    List<Contact> listContact = jdbcTemplate.query(sql, new RowMapper<Contact>() {
	   
	 
	        @Override
	        public Contact mapRow(ResultSet rs, int rowNum) throws SQLException {
	            Contact aContact = new Contact();
	 
	            aContact.setId(rs.getInt("contact_id"));
	            aContact.setName(rs.getString("name"));
	            aContact.setEmail(rs.getString("email"));
	            aContact.setAddress(rs.getString("address"));
	            aContact.setTelephone(rs.getString("telephone"));
	            return aContact;
	        }
   	    });
	    return listContact;
	}
}

控制器类 

@Controller
public class HomeController {
		
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	@Autowired
	private ContactDao contactDao;

	//Handler method for listing all contacts (also served as home page):
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public ModelAndView listContact(ModelAndView model) throws IOException{
	    List<Contact> listContact = contactDao.list();
	    model.addObject("listContact", listContact);
	    model.setViewName("home");
	    return model;
}
   	//Handler method for displaying new contact form:
	@RequestMapping(value = "/newContact", method = RequestMethod.GET)
	public ModelAndView newContact(ModelAndView model) {
	    Contact newContact = new Contact();
	    model.addObject("contact", newContact);
	    model.setViewName("ContactForm");
	    return model;
	}
	
	//Handler method for inserting/updating a contact:
	@RequestMapping(value = "/saveContact", method = RequestMethod.POST)
	public ModelAndView saveContact(@ModelAttribute Contact contact) 
	{
	contactDao.saveOrUpdate(contact);
	return new ModelAndView("redirect:/");
	}
		
	//Handler method for retrieving details of a particular contact for editing:
	@RequestMapping(value = "/editContact", method = RequestMethod.GET)
	public ModelAndView editContact(HttpServletRequest request) {
	    int contactId = Integer.parseInt(request.getParameter("id"));
	    Contact contact = contactDao.get(contactId);
	    ModelAndView model = new ModelAndView("ContactForm");
	    model.addObject("contact", contact);
	    return model;
	}
}

MVCConfiguration 

package com.varun.contact.config;

@Configuration
@ComponentScan(basePackages="com.varun.contact")
@EnableWebMvc
@Repository
public class MvcConfiguration extends WebMvcConfigurerAdapter {
	
	@Bean
	public ViewResolver getViewResolver(){
		InternalResourceViewResolver resolver = new InternalResourceViewResolver();
		resolver.setPrefix("/WEB-INF/views/");
		resolver.setSuffix(".jsp");
	    return resolver;
	}
	
	@Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    }
	
	 @Bean
	    public DataSource getDataSource() {
	        DriverManagerDataSource dataSource = new DriverManagerDataSource();
	        dataSource.setDriverClassName("oracle.jdbc.driver.OracleDriver");
	        dataSource.setUrl("jdbc:oracle:thin:@localhost:1521:orcl");
	        dataSource.setUsername("system");
	        dataSource.setPassword("admin");
	        return (DataSource) dataSource;
	    }

	  @Bean
	    public ContactDao getContactDao() {
	        return new ContactDAOImpl(getDataSource());
	    }
}

ContactForm.jsp 

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>New/Edit Contact</title>
</head>
<body>
    <div align="center">
        <h1>New/Edit Contact</h1>
        <form:form action="saveContact" method="post" modelAttribute="contact">
        <table>
           <tr>
                <td>Id:</td>
                <td><form:input path="id" /></td>
            </tr>
            <tr>
                <td>Name:</td>
                <td><form:input path="name" /></td>
            </tr>
            <tr>
                <td>Email:</td>
                <td><form:input path="email" /></td>
            </tr>
            <tr>
                <td>Address:</td>
                <td><form:input path="address" /></td>
            </tr>
            <tr>
                <td>Telephone:</td>
                <td><form:input path="telephone" /></td>
            </tr>
            <tr>
                <td colspan="2" align="center"><input type="submit" value="Save"></td>
            </tr>
        </table>
        </form:form>
    </div>
</body>
</html>

回到Home.jsp 

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Contact Manager Home</title>
</head>
<body>

<h1>
	Welcome.............................. 
</h1>
<P>  The time on the server is ${serverTime}. </P> 


<div align="center">
<h1>Contact List</h1>
 <h3><a href="/newContact">New Contact</a></h3>
            <table border="1">
                <th>No</th>
                <th>Name</th>
                <th>Email</th>
                <th>Address</th>
                <th>Telephone</th>
                <th>Action</th>
                 
                <c:forEach var="contact" items="${listContact}" varStatus="status">
                <tr>
                    <td>${status.index + 1}</td>
                    <td>${contact.name}</td>
                    <td>${contact.email}</td>
                    <td>${contact.address}</td>
                    <td>${contact.telephone}</td>
                    <td>
                        <a href="/editContact?id=${contact.id}">Edit</a>
                        &nbsp;&nbsp;&nbsp;&nbsp;
                        <a href="/deleteContact?id=${contact.id}">Delete</a>
                   </td>
                             
              </tr>
         </c:forEach>             
    </table>
</div>
</body>
</html>

Web.xml中 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<welcome-file-list>
	<welcome-file>ContactForm.jsp</welcome-file>
	</welcome-file-list>
	
	
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/servlet-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>DispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/spring/servlet-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
		
	<servlet-mapping>
		<servlet-name>DispatcherServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<listener>
   		 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

</web-app>

请帮助我，我真的无法理解这个

有什么问题

2 个答案:

答案 0 :(得分：0)

看起来在控制器中注入ContactDAO的问题。

使用@Repository注释标记您的ContactDAOImpl，并检查ContactDAOImpl所在的包是否包含在您的配置的scan中

答案 1 :(得分：0)

你需要告诉Spring从中获取bean的位置。要做到这一点：

  1. 使用ContactDAOImpl
    2. 注释@Repository

  2. 在xml配置中添加一行：

    <context:component-scan base-package="dao packagename" />

    3. 通过这样做，您指的是需要从中拾取bean的位置。

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