如何避免错误自动连接依赖项注入失败？
[英]How can I avoid error Injection of autowired dependencies failed?
问题描述
I'm trying to add JpaRepository to my Spring MVC JPA project. 
我试图将JpaRepository添加到我的Spring MVC JPA项目中。
Right now with my configuration everything works great. 现在，通过我的配置，一切都很好。 I have a simple model (based on a project by fruzenshtein, https://github.com/Fruzenshtein/spr-data ). 我有一个简单的模型（基于fruzenshtein的项目， https：//github.com/Fruzenshtein/spr-data ）。
Model: Shop
Service: ShopService
Controller: ShopController
For example in ShopServiceImpl.java I have just one method: 例如在ShopServiceImpl.java中，我只有一种方法：
@Transactional
public List<Shop> getAll() {
List<Shop> result = em.createQuery("SELECT s FROM Shop s", Shop.class).getResultList();
return result;
}
and in ShopController.java I add my @Autowired 然后在ShopController.java中添加我的@Autowired
@Autowired
private ShopService shopSvc;
At this point everythings ok. 此时一切正常。
Well, I want to add my own repository like this: 好吧，我想添加自己的存储库，如下所示：
@Repository
public interface ShopRepository extends JpaRepository<Shop, Integer> {
}
and add @Autowired in ShopServiceImpl.java 并在ShopServiceImpl.java中添加@Autowired
@Autowired
private ShopRepository shopRepository;
and I get this error: 我得到这个错误：
**org.springframework.beans.factory.BeanCreationException:Error creating bean with name 'shopServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository
org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null**
I know this is an old issue posted before, but after two weeks trying to fix this error (I think I had read all forum in stackoverflow) I dediced to post my question/problem with my own code waiting for a possible solution 我知道这是以前发布的旧问题，但是在尝试修复此错误两周后（我想我已经阅读了stackoverflow中的所有论坛），我致力于用自己的代码发布问题/问题，等待可能的解决方案
This is my code: 这是我的代码：
Model: 模型：
public class Shop {
@Id
@GeneratedValue
private Integer id;
private String name;
@Column(name = "employees_number")
private Integer emplNumber;
// Constructor obligatorio
public Shop() {
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getEmplNumber() {
return emplNumber;
}
public void setEmplNumber(Integer emplNumber) {
this.emplNumber = emplNumber;
}
}
Repository: 库：
@Repository
public interface ShopRepository extends JpaRepository<Shop, Integer> {
List<Shop> findByShopId(Long userId);
}
ShopService: ShopService：
public interface ShopService {
public List<Shop> findAll();
}
ShopServiceImpl: ShopServiceImpl：
@Service
public class ShopServiceImpl implements ShopService {
private static final Log log = LogFactory.getLog(ShopServiceImpl.class);
@Autowired
private ShopRepository shopRepository;
// An EntityManager will be automatically injected from EntityManagerFactory
// setup on spring-context.xml
// @PersistenceContext
// private EntityManager em;
@Transactional
public List<Shop> findAll() {
return shopRepository.findAll();
}
}
ShopController: ShopController：
@Controller
@RequestMapping(value = "/shop")
public class ShopController {
@Autowired
private ShopServiceImpl shopService;
@RequestMapping(value = "/list", method = RequestMethod.GET)
public ModelAndView shopListPage() {
ModelAndView mav = new ModelAndView("shop-list");
List<Shop> shopList = shopService.findAll();
if (shopList != null) {
mav.addObject("shopList", shopList);
return mav;
} else {
return null;
}
}
}
web.xml: web.xml中：
<?xml version="1.0" encoding="UTF-8"?>
<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>jpa-hibernate</display-name>
<servlet>
<description>
</description>
<display-name>jpa</display-name>
<servlet-name>jpa</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jpa</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
jpa-servlet.xml: JPA-servlet.xml中：
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
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
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"
xmlns:tx="http://www.springframework.org/schema/tx">
<!-- http://www.journaldev.com/7655/spring-orm-example-with-jpa-hibernate-transactions -->
<!-- http://gordondickens.com/wordpress/2011/08/01/simpler-jpa-with-spring-data-jpa/ -->
<!-- <context:annotation-config /> -->
<!-- <beans:bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"
/> -->
<!-- Scans the classpath for annotated components that will be auto-registered
as Spring beans -->
<context:component-scan base-package="org.jpa" />
<context:component-scan base-package="org.jpa.repository" />
<context:component-scan base-package="org.jpa.service" />
<context:component-scan base-package="org.jpa.controller" />
<context:component-scan base-package="org.jpa.model" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<!-- DataSource para Microsoft Sql Server 2005 -->
<beans:bean id="dataSource" name="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<beans:property name="driverClassName"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<beans:property name="url"
value="" />
<beans:property name="username" value="" />
<beans:property name="password" value="" />
</beans:bean>
<beans:bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
p:packagesToScan="org.jpa" p:dataSource-ref="dataSource">
<beans:property name="jpaVendorAdapter">
<beans:bean
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<beans:property name="generateDdl" value="true" />
<beans:property name="showSql" value="true" />
</beans:bean>
</beans:property>
</beans:bean>
<!-- Transactions -->
<beans:bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<beans:property name="entityManagerFactory" ref="entityManagerFactory" />
</beans:bean>
<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven />
<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
<!-- JPA -->
<jpa:repositories base-package="org.jpa.repository" />
<!-- <jpa:repositories base-package="org.jpa.repository" entity-manager-factory-ref="entityManagerFactory"
transaction-manager-ref="transactionManager" /> -->
<!-- Activates various annotations to be detected in bean classes e.g: @Autowired -->
</beans:beans>
pom.xml: pom.xml中：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>jpa-repository</groupId>
<artifactId>jpa-repository</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>3.1.4.RELEASE</spring.version>
<hibernate.version>3.6.0.Final</hibernate.version>
<org.slf4j-version>1.6.6</org.slf4j-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>xalan</groupId>
<artifactId>xalan</artifactId>
<version>2.7.1</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
</exclusions>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
</configuration>
</plugin>
</plugins>
</build>
</project>
persistence.xml: persistence.xml中：
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="persistenceUnit"
transaction-type="RESOURCE_LOCAL">
<!-- <persistence-unit name="persistenceUnit" transaction-type="JTA"> -->
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServerDialect" />
<!-- Show and print nice SQL on stdout -->
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.hbm2ddl.auto" value="validate" />
<!-- <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy"
/> -->
<property name="hibernate.connection.charSet" value="UTF-8" />
</properties>
</persistence-unit>
</persistence>
Added entire stacktrace log: 添加了整个stacktrace日志：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.service.ShopServiceImpl org.jpa.controller.ShopController.shopService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
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:607)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:925)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:472)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at org.apache.catalina.core.StandardService.start(StandardService.java:480)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
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:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.service.ShopServiceImpl org.jpa.controller.ShopController.shopService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:513)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
... 34 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
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$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:871)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:813)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:485)
... 36 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:513)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
... 47 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1442)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:305)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:871)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:813)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:485)
... 49 more
Caused by: java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.util.Assert.notNull(Assert.java:123)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.<init>(SimpleJpaRepository.java:74)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:94)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:69)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:146)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:120)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:39)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)
... 57 more
2016-02-15 12:07:39 StandardContext[/jpa-hibernate]El Servlet /jpa-hibernate lanzó excepción de load()
javax.servlet.ServletException: Servlet.init() para servlet jpa lanzó excepción
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1071)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at org.apache.catalina.core.StandardService.start(StandardService.java:480)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
----- Root Cause -----
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.service.ShopServiceImpl org.jpa.controller.ShopController.shopService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.jpa.repository.ShopRepository org.jpa.service.ShopServiceImpl.shopRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null
Added code to github: https://github.com/elecdesa/jpa-repository/ 将代码添加到github： https : //github.com/elecdesa/jpa-repository/
Thanks 谢谢
3 个解决方案
解决方案1
1 2016-02-15 15:30:29
On your repository, you listed a method findByShopId , but your class has no shopId property. 在您的存储库中，您列出了方法findByShopId ，但是您的类没有shopId属性。 Remove the declaration and just use find . 删除声明，然后使用find 。
(Also, for any new Spring projects, use Boot; it dramatically cuts down on the boilerplate configuration. Additionally, use constructor injection instead of field injection whenever possible.) （此外，对于任何新的Spring项目，请使用Boot；它会大大减少样板配置。此外，尽可能使用构造函数注入而不是字段注入。）
解决方案2
0 2016-02-22 17:53:35
Finally resolved the problem. 终于解决了问题。 Making some changes and it works. 进行一些更改，它将起作用。
code in github: https://github.com/elecdesa/jpa-repository/ github中的代码： https : //github.com/elecdesa/jpa-repository/
Thanks anyway 不管怎么说，还是要谢谢你
解决方案3
-1 2016-02-15 15:20:56
您是否尝试过将@Repository注释从ShopRepository接口移到实现它的实际类中？
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