Question

问题标题可能相同，但我试图通过查看以前的答案来解决此错误，但没有任何反应。我在将数据插入数据库时遇到以下错误。创建表，但在将数据插入数据库时出错。

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'InitDbService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.app.flight.repo.RoleRepository com.app.flight.service.InitDbService.roleRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roleRepository': Cannot create inner bean '(inner bean)#397030fe' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#397030fe': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' is defined
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)

这是我的Role.java实体类

@Entity
public class Role {
   @Id
   @GeneratedValue
   private Integer id;
   private String name;

   (getters and setters)

这是RoleRepository.java界面

package com.app.flight.repo;

import org.springframework.data.jpa.repository.JpaRepository;
import com.app.flight.entity.Role;

public interface RoleRepository extends JpaRepository<Role, Integer> {

}

这是服务类InitDbService.java

package com.app.flight.service;

import javax.annotation.PostConstruct;
import javax.transaction.Transactional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.app.flight.entity.Role;
import com.app.flight.repo.RoleRepository;

@Transactional
@Service
public class InitDbService {

    @Autowired
    private RoleRepository roleRepository;

    @PostConstruct
    public void init(){

        Role roleUser = new Role();
        roleUser.setName("ROLE_USER");
        roleRepository.save(roleUser);

        Role roleAdmin= new Role();
        roleAdmin.setName("ROLE_ADMIN");
        roleRepository.save(roleAdmin);

    }
}

这是applicationContext.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:context="http://www.springframework.org/schema/context"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xmlns:repository="http://www.springframework.org/schema/data/repository"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.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-4.1.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.8.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/data/repository http://www.springframework.org/schema/data/repository/spring-repository-1.7.xsd">

<context:component-scan base-package="com.app.flight">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<jdbc:embedded-database type="HSQL" id="dataSource"/>

<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="emf">
    <property name="packagesToScan" value="com.app.flight.entity"/>
    <property name="dataSource" ref="dataSource"/>
    <property name="jpaProperties">
        <props>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.hbm2ddl.auto">create</prop>
        </props>
    </property>
    <property name="persistenceProvider">
        <bean class="org.hibernate.jpa.HibernatePersistenceProvider"/>
    </property>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>

<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>

<jpa:repositories base-package="com.app.flight.repo"/>

</beans>

Answer 1

它期望EntityManagerFactory在这种情况下具有特定名称“entityManagerFactory”。您定义了自定义名称“emf”。如果您调整xml文件中的条目，我认为问题已得到解决。

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