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不満依存性は「サービス」フィールドを通して表現：タイプ

2016-07-12 9 views
3

こんにちはみんなのいかなる予選Beanは、すべてのボディは、私は春のMVCを使用して新しいプロジェクトを作成してい 私を助けていない。これは不満依存性は「サービス」フィールドを通して表現：タイプ

package com.cs545.ecom.repository; 

import java.util.List; 

import com.cs545.ecom.domain.Product; 

public interface ProductDAO { 
    List<Product> getAllProducts(); 

    Product getProductById(int id); 

    Product getProductByName(String name); 

    Product addNewProduct(Product product); 

    Product updateProduct(int productId, Product product); 

}

私のリポジトリであり、これはある を休止することができます実装

package com.cs545.ecom.repository.impl; 

import java.util.List; 

import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.cfg.Configuration; 
import org.springframework.stereotype.Repository; 

import com.cs545.ecom.domain.Product; 
import com.cs545.ecom.repository.ProductDAO; 

@Repository 
public class ProductDAOimpl implements ProductDAO{ 

    SessionFactory sessionFactory=new Configuration().configure().buildSessionFactory(); 
    public List<Product> getAllProducts() { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    public Product getProductById(int id) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    public Product getProductByName(String name) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    public Product addNewProduct(Product product) { 
     Product productSaved=new Product(); 
     Session session=sessionFactory.openSession(); 
     session.beginTransaction(); 
     productSaved=(Product)session.save(product); 
     session.getTransaction().commit(); 
     session.close(); 
     return productSaved; 
    } 

    public Product updateProduct(int productId, Product product) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

}

も、これはサービス・インターフェース

package com.cs545.ecom.service; 

import com.cs545.ecom.domain.Product; 

public interface ProductService { 
    Product addNewProduct(Product product); 
}
012です私はこのエラーを得たプログラムを実行すると

と、これはサービスの実装では、

package com.cs545.ecom.service.impl; 



import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Component; 
import org.springframework.stereotype.Service; 

import com.cs545.ecom.domain.Product; 
import com.cs545.ecom.repository.ProductDAO; 
import com.cs545.ecom.service.ProductService; 
@Service 
public class ProductServiceImpl implements ProductService { 
    @Autowired 
    private ProductDAO repository; 

    public Product addNewProduct(Product product) { 
     return repository.addNewProduct(product); 
    } 

}

これはコントローラ

package com.cs545.ecom.controller; 



import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Controller; 
import org.springframework.ui.Model; 
import org.springframework.web.bind.annotation.RequestMapping; 

import com.cs545.ecom.domain.Category; 
import com.cs545.ecom.domain.Product; 
import com.cs545.ecom.repository.ProductDAO; 
import com.cs545.ecom.service.ProductService; 

@Controller 
public class ProductController { 
    @Autowired 
    public ProductService service; 

    @RequestMapping("/") 
    public String start() { 
     return "UI/jsp/product"; 
    } 
    @RequestMapping("/addproduct") 
    public String addNewProduct(Model model){ 
    // Product product=service.addNewProduct(new Product("Apple iphone", "gfgfg", "Amazing Iphone ", new Category())); 
     //Product product=new Product("Apple iphone", "gfgfg", "Amazing Iphone ", new Category()); 

     //model.addAttribute("product",product); 
     return "UI/jsp/product"; 
    } 
}

ある

HTTP Status 500 - Servlet.init() for servlet Dispatcher Servlet threw exception 


type Exception report 

message Servlet.init() for servlet Dispatcher Servlet threw exception 

description The server encountered an internal error that prevented it from fulfilling this request. 

exception 
javax.servlet.ServletException: Servlet.init() for servlet Dispatcher Servlet threw exception 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Unknown Source) 


root cause 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'productController': Unsatisfied dependency expressed through field 'service': No qualifying bean of type [com.cs545.ecom.service.ProductService] found for dependency [com.cs545.ecom.service.ProductService]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.cs545.ecom.service.ProductService] found for dependency [com.cs545.ecom.service.ProductService]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:569) 
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775) 
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) 
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) 
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) 
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) 
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) 
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) 
    javax.servlet.GenericServlet.init(GenericServlet.java:158) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Unknown Source) 


root cause 
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.cs545.ecom.service.ProductService] found for dependency [com.cs545.ecom.service.ProductService]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1403) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1056) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1018) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566) 
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775) 
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) 
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) 
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) 
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) 
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) 
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) 
    javax.servlet.GenericServlet.init(GenericServlet.java:158) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Unknown Source)

これは私のweb.xmlファイル

です 
<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
     version="3.1"> 

    <servlet> 
     <servlet-name>Dispatcher Servlet</servlet-name> 
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
     <!--init-param is not needed when followed default naming convention for configuration file "DefaultServlet-servlet.xml"--> 
     <init-param> 
      <param-name>contextConfigLocation</param-name> 
      <param-value> 
       /WEB-INF/dispatcher-config.xml 
      </param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 

    <servlet-mapping> 
     <servlet-name>Dispatcher Servlet</servlet-name> 
     <url-pattern>/</url-pattern> 
    </servlet-mapping> 

    <session-config> 
     <session-timeout> 
      30 
     </session-timeout> 
    </session-config> 
</web-app>

これは春の設定

<?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-4.0.xsd 
     http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 
    "> 
    <mvc:annotation-driven/> 
    <mvc:resources mapping="/resources/**" location="/resources/"/> 
    <context:component-scan base-package="com.cs545.ecom.controller"/> 

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix" value="/WEB-INF/views/" /> 
    <property name="suffix" value=".jsp"/> 
    </bean> 
    <bean id= "messageSource" 
class="org.springframework.context.support.ResourceBundleMessageSource"> 
<property name="basename" value="messages"/> 
</bean> 

</beans>

はまた、これはHibernate構成

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 
     <property name="hibernate.bytecode.use_reflection_optimizer">false</property> 
     <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
     <property name="hibernate.connection.password">111111</property> 
     <property name="hibernate.connection.url">jdbc:mysql://localhost:3338/waaProject</property> 
     <property name="hibernate.connection.username">root</property> 
     <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
     <property name="show_sql">true</property> 
     <property name="hbm2ddl.auto">update</property> 
     <mapping class="com.cs545.ecom.domain.Product"></mapping> 
    </session-factory> 
</hibernate-configuration>

です誰も私を助けることができますか？あなたはcom.cs545.ecom.service
を含める必要がコンポーネント・スキャンの構成で

出典

2016-07-12 Hamada Ibrahim

答えて

4 

<context:component-scan base-package="com.cs545.ecom"/>

下に示すように、あなたはweb.xmlに

<context:component-scan base-package="com.cs545.ecom.controller, com.cs545.ecom.service"/>

出典

2016-07-12 00:24:13

+0

新しいパッケージを追加するたびに自分自身を編集しなくても済むようにするには、 'com.cs545'をスキャンしてください。 – dnault

+0

Yeap。あなたの場合に依存します。スキャン範囲が大きくなると、春の起動に時間がかかります。 –

0

変更context:component-scanを持つべきですSpringは、指定されたパッケージ内で定義されたすべてのBeanを登録します。あなたのケースではコントローラBeanのみが登録され、サービスBeanは登録されません。

出典

2016-07-15 09:04:31

0

他の回答でも触れたように、Beanのクラスパススキャンを設定して、他のBeanにオートワイヤできることを確認する必要があります。

これ以外にも、このエラーはいくつかの他の問題によって引き起こされる可能性があります。この主な理由は、実行時にそのタイプのBeanを他のクラスにオートワイヤードしようとすると、IOCコンテナはタイプSomeTypeのBeanを初期化していません。

このarticleは、これを引き起こす可能性のある間違いをまとめたものです。

出典

2018-02-22 09:54:41

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