Java SpringBoot2.0.0.M4需要一个名为'；实体管理工厂&x27；那是找不到的

对于spring boot 2.0.0.M4版本，我遇到了以下问题：

    Description:


Field userRepository in 
webroot.websrv.auth.service.JwtUserDetailsServiceImpl required a bean 
named 'entityManagerFactory' that could not be found.


Action:

Consider defining a bean named 'entityManagerFactory' in your 
configuration.

[WARNING] 
 java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at ...
Caused by: org.springframework.context.ApplicationContextException: 
Unable to start web server; nested exception is 
org.springframework.boot.web.server.WebServerException: Unable to start 
embedded Tomcat

Caused by: 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error 
creating bean with name 'jwtUserDetailsServiceImpl': Unsatisfied 
dependency expressed through method 'setUserRepository' parameter 0; 
nested exception is 
org.springframework.beans.factory.BeanCreationException: Error creating 
bean with name 'userRepository': Cannot create inner bean '(inner 
bean)#770f146b' 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)#770f146b': Cannot resolve reference to 
bean 'entityManagerFactory' while setting constructor argument; nested 
exception is 
org.springframework.beans.factory.NoSuchBeanDefinitionException: No 
bean named 'entityManagerFactory' available


Spring启动应用程序启动：


        @Service

        public class JwtUserDetailsServiceImpl implements 
    UserDetailsService {


    @Autowired
    private UserRepository userRepository;

    /**
     * Injects UserRepository instance
     * @param userRepository to inject
      */
    @Autowired
   public void setUserRepository(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

已实现的Jwt服务JwtUserDetailsServiceImpl：



这里是UserRepository：

包webroot.websrv.auth.repository；
导入org.springframework.data.jpa.repository.JpaRepository；
导入org.springframework.stereotype.Repository；
导入webroot.websrv.auth.entity.User；
@存储库
公共接口用户存储库扩展了JpaRepository{
/**
*通过电子邮件查找用户
*@param要查找的电子邮件
*@通过给定电子邮件返回用户
*/
用户findByEmail（字符串电子邮件）；
/**
*按名称查找用户
*@param name要查找的名称
*@按给定名称返回用户
*/
用户findByName（字符串名称）；
}

我在这里看到过几次关于这个问题的报道，但大多数情况下，我都认为对于给定的解决方案是可以的

我是否必须向实体管理器显式定义bean？应该自动注射吗

我为UserRepository添加了类，它扩展了一个JpaRepository

谢谢

Bruno
我找到了解决方案，有必要实施JPA配置：

您在项目中使用了哪个持久化提供程序？我为UserRepository添加了类，它扩展了JpaRepository。JPA持久化提供程序可能是
eclipselink
，
hibernate
，
spring数据
等。我认为这可能会有帮助。是的，使用spring数据：org.springframework.data spring data jpa您的用户存储库看起来有点奇怪……这是我的：@Repository public interface UserRepository extensed JpaRepository{}您不应该从JpaBaseConfiguration扩展吗？Spring不能为我们这样做吗？

        @Service

        public class JwtUserDetailsServiceImpl implements 
    UserDetailsService {


    @Autowired
    private UserRepository userRepository;

    /**
     * Injects UserRepository instance
     * @param userRepository to inject
      */
    @Autowired
   public void setUserRepository(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

package webroot.websrv.auth.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import webroot.websrv.auth.entity.User;

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

/**
 * Finds user by email
 * @param email to look for
 * @return user by given email
 */
User findByEmail(String email);

/**
 * Finds user by name
 * @param name to look for
 * @return user by given name
 */
User findByName(String name);
 }

 @Configuration
@EnableJpaRepositories(basePackages = "webroot.webserv",
    entityManagerFactoryRef = "entityManagerFactory",
    transactionManagerRef = "transactionManager")
@EnableTransactionManagement
public class JpaConfiguration {

@Autowired
private Environment environment;

@Value("${datasource.sampleapp.maxPoolSize:10}")
private int maxPoolSize;

/*
 * Populate SpringBoot DataSourceProperties object directly from 
application.yml 
 * based on prefix.Thanks to .yml, Hierachical data is mapped out of 
the box with matching-name
 * properties of DataSourceProperties object].
 */
@Bean
@Primary
@ConfigurationProperties(prefix = "spring.datasource")
public DataSourceProperties dataSourceProperties(){
    return new DataSourceProperties();
}

/*
 * Configure HikariCP pooled DataSource.
 */
@Bean
public DataSource dataSource() {
    DataSourceProperties dataSourceProperties = dataSourceProperties();
        HikariDataSource dataSource = (HikariDataSource) 
org.springframework.boot.jdbc.DataSourceBuilder
                .create(dataSourceProperties.getClassLoader())

.driverClassName(dataSourceProperties.getDriverClassName())
                .url(dataSourceProperties.getUrl())
                .username(dataSourceProperties.getUsername())
                .password(dataSourceProperties.getPassword())
                .type(HikariDataSource.class)
                .build();
        dataSource.setMaximumPoolSize(maxPoolSize);
        return dataSource;
}

/*
 * Entity Manager Factory setup.
 */
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() 
throws NamingException {
    LocalContainerEntityManagerFactoryBean factoryBean = new 
LocalContainerEntityManagerFactoryBean();
    factoryBean.setDataSource(dataSource());
    factoryBean.setPackagesToScan(new String[] { "webroot.websrv" });
    factoryBean.setJpaVendorAdapter(jpaVendorAdapter());
    factoryBean.setJpaProperties(jpaProperties());
    return factoryBean;
}

/*
 * Provider specific adapter.
 */
@Bean
public JpaVendorAdapter jpaVendorAdapter() {
    HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new 
HibernateJpaVendorAdapter();
    return hibernateJpaVendorAdapter;
}

/*
 * Here you can specify any provider specific properties.
 */
private Properties jpaProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", 
  environment.getRequiredProperty
("spring.jpa.properties.hibernate.dialect")
 );
 ...
    return properties;
}

@Bean
@Autowired
public PlatformTransactionManager 
transactionManager(EntityManagerFactory emf) {
    JpaTransactionManager txManager = new JpaTransactionManager();
    txManager.setEntityManagerFactory(emf);
    return txManager;
}
}

Thanks for the suggestions.