Spring-boot：需要一个找不到的名为“entityManagerFactory”的bean
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【中文标题】Spring-boot：需要一个找不到的名为“entityManagerFactory”的bean【英文标题】：Spring-boot: required a bean named 'entityManagerFactory' that could not be found 【发布时间】：2018-07-03 04:05:36 【问题描述】：我正在使用 JPA 开发 Spring Boot 应用程序并遇到此错误。我不确定我是否使用了正确的注释或缺少依赖项。任何帮助将不胜感激。
这是错误信息
1:05:28 AM: Executing external task 'bootRun'...
:compileJava
:processResources UP-TO-DATE
:classes
:findMainClass
:bootRun
01:05:35.198 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []
01:05:35.201 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Excluded patterns for restart : [/spring-boot-starter/target/classes/, /spring-boot-autoconfigure/target/classes/, /spring-boot-starter-[\w-]+/, /spring-boot/target/classes/, /spring-boot-actuator/target/classes/, /spring-boot-devtools/target/classes/]
01:05:35.201 [main] DEBUG org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs for reloading : [file:/C:/Users/zahid/IdeaProjects/giflib/build/classes/main/, file:/C:/Users/zahid/IdeaProjects/giflib/build/resources/main/]
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.3.RELEASE)
2018-01-24 01:05:35.539 INFO 14840 --- [ restartedMain] com.sweng.giflib.Application : Starting Application on DESKTOP-EKFI3C8 with PID 14840 (C:\Users\zahid\IdeaProjects\giflib\build\classes\main started by zahid in C:\Users\zahid\IdeaProjects\giflib)
2018-01-24 01:05:35.540 INFO 14840 --- [ restartedMain] com.sweng.giflib.Application : No active profile set, falling back to default profiles: default
2018-01-24 01:05:35.828 INFO 14840 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@396ad740: startup date [Wed Jan 24 01:05:35 CST 2018]; root of context hierarchy
2018-01-24 01:05:37.685 INFO 14840 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-01-24 01:05:37.697 INFO 14840 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service Tomcat
2018-01-24 01:05:37.699 INFO 14840 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.14
2018-01-24 01:05:37.800 INFO 14840 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-01-24 01:05:37.801 INFO 14840 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1976 ms
2018-01-24 01:05:37.991 INFO 14840 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-01-24 01:05:37.992 INFO 14840 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-01-24 01:05:37.992 INFO 14840 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-01-24 01:05:37.992 INFO 14840 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-01-24 01:05:37.993 INFO 14840 --- [ost-startStop-1] .s.DelegatingFilterProxyRegistrationBean : Mapping filter: 'springSecurityFilterChain' to: [/*]
2018-01-24 01:05:37.994 INFO 14840 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-01-24 01:05:38.291 WARN 14840 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'securityConfig': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#64397422' 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)#64397422': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
2018-01-24 01:05:38.294 INFO 14840 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service Tomcat
2018-01-24 01:05:38.321 INFO 14840 --- [ restartedMain] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-01-24 01:05:38.444 ERROR 14840 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userRepository in com.sweng.giflib.service.UserServiceImpl required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
BUILD SUCCESSFUL
Total time: 9.681 secs
1:05:38 AM: External task execution finished 'bootRun'.
build.gradle
buildscript
ext
springBootVersion = '1.5.3.RELEASE'
repositories
mavenCentral()
dependencies
classpath("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")
group 'com.sweng'
version '1.0-SNAPSHOT'
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'war'
repositories
mavenCentral()
springBoot
mainClass = "com.sweng.giflib.Application"
dependencies
compile "org.springframework.boot:spring-boot-starter-data-jpa:$springBootVersion"
compile "org.springframework.boot:spring-boot-starter-web:$springBootVersion"
compile "org.springframework.boot:spring-boot-starter-thymeleaf:$springBootVersion"
compile "org.springframework.boot:spring-boot-devtools:$springBootVersion"
compile "mysql:mysql-connector-java"
compile "org.springframework.boot:spring-boot-starter-security:$springBootVersion"
compile "org.thymeleaf.extras:thymeleaf-extras-springsecurity4:2.1.2.RELEASE"
providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
application.properties
spring.datasource.url== jdbc:mysql://localhost:3306/giflib
spring.db.driver= com.mysql.jdbc.Driver
spring.datasource.username = su
spring.datasource.password =
spring.jpa.show-sql = true
#spring.jpa.hibernate.ddl-auto = update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.naming.strategy = org.hibernate.cfg.ImprovedNamingStrategy
Application.java
package com.sweng.giflib;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@ComponentScan
@Configuration
@EnableAutoConfiguration(exclude = DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class)
@EnableJpaRepositories(basePackages = "com.sweng.giflib.repository")
@SpringBootApplication(scanBasePackages= "com.sweng.giflib")
public class Application extends SpringBootServletInitializer
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application)
return application.sources(Application.class);
public static void main(String[] args) throws Exception
SpringApplication.run(Application.class, args);
UserService.java
package com.sweng.giflib.service;
import com.sweng.giflib.model.User;
import org.springframework.security.core.userdetails.UserDetailsService;
public interface UserService extends UserDetailsService
User findByUsername(String username);
UserServiceImpl.java
package com.sweng.giflib.service;
import com.sweng.giflib.repository.UserRepository;
import com.sweng.giflib.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService
@Autowired
private UserRepository userRepository;
@Override
public User findByUsername(String username)
return userRepository.findByusername(username);
@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException
// Load user from the database (throw exception if not found)
User user = userRepository.findByusername(username);
if(user == null)
throw new UsernameNotFoundException("User not found");
// Return user object
return user;
UserRepository.java
package com.sweng.giflib.repository;
import com.sweng.giflib.model.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface UserRepository extends CrudRepository<User, Long>
User findByusername(String name);
User.java
package com.sweng.giflib.model;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import javax.persistence.*;
import javax.validation.constraints.Size;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
@Entity
public class User implements UserDetails
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(unique = true)
@Size(min = 8, max = 20)
private String username;
@Column(length = 100)
private String password;
@Column(nullable = false)
private boolean enabled;
@OneToOne
@JoinColumn(name = "role_id")
private Role role;
@Override
public Collection<? extends GrantedAuthority> getAuthorities()
List<GrantedAuthority> authorities = new ArrayList<>();
authorities.add(new SimpleGrantedAuthority(role.getName()));
return authorities;
public Long getId()
return id;
public void setId(Long id)
this.id = id;
@Override
public String getPassword()
return password;
@Override
public String getUsername()
return username;
@Override
public boolean isAccountNonExpired()
return true;
@Override
public boolean isAccountNonLocked()
return true;
@Override
public boolean isCredentialsNonExpired()
return true;
@Override
public boolean isEnabled()
return enabled;
【问题讨论】：
为什么要排除DataSourceAutoConfiguration.class和HibernateJpaAutoConfiguration.class？
如果我取出排除项并简单地使用@EnableAutoConfiguration，Springboot 会抛出一个关于无法配置 inMemoryDatabase 的错误。这就是我所看到的： org.springframework.beans.factory.UnsatisfiedDependencyException：在类路径资源 [org/springframework/boot/devtools/autoconfigure/DevToolsDataSourceAutoConfiguration.class] 中定义的名称为“inMemoryDatabaseShutdownExecutor”的 bean 创建时出错：使用名称创建 bean 时出错类路径资源中定义的“dataSource”
尝试在你的主类上没有任何注释的情况下启动你的应用程序。离开@SpringBootApplication。也没有scanBasePackages= "com.sweng.giflib"
感谢您的建议，但仅使用 @SpringBootApplication 而没有其他注释，我仍然对 inMemoryDatabasesShutdown 有所了解。我看到 org.springframework.beans.factory.UnsatisfiedDependencyException：在类路径资源 [org/springframework/boot/devtools/autoconfigure/DevToolsDataSourceAutoConfiguration.class] 中定义名称为 'inMemoryDatabaseShutdownExecutor' 创建 bean 时出错：通过方法 'inMemoryDatabaseShutdownExecutor' 参数表示的不满足依赖项0;
我刚刚注意到您的属性中有一些错误。检查我的更新答案
【参考方案1】：
你要么需要删除exclude = DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class（在这种情况下Spring会自动配置你的数据源）要么configure your datasource manually
@Bean
@ConfigurationProperties(prefix="spring.datasource")
public DataSource dataSource()
return new YourCustomDataSource();
更新：您的属性似乎有一些错误：
spring.datasource.url== jdbc:mysql://localhost:3306/giflib
spring.db.driver= com.mysql.jdbc.Driver
尝试从第一行删除多余的=，并在第二行使用spring.datasource.driver-class-name 属性名称：
spring.datasource.url=jdbc:mysql://localhost:3306/giflib
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
同时为你的 MySQL 依赖添加一个版本：
compile "mysql:mysql-connector-java:6.0.6"
我认为由于这些错误，Spring 无法正确自动检测您的数据源类型。
【讨论】：
【参考方案2】：您已选择绕过 EntityManagerFactory 的自动创建。因此，您应该在其中一个配置类中添加以下两个 bean，可能在 Application 类中。
private static String PROP_DB_DRIVER_CLASS = "spring.db.driver";
private static String PROP_DB_URL = "spring.datasource.url";
private static String PROP_DB_USER = "spring.datasource.username";
private static String PROP_DB_PASS = "spring.datasource.password";
@Autowired
private Environment env;
@Bean
public DataSource dataSource()
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty(PROP_DB_DRIVER_CLASS));
dataSource.setUrl(env.getProperty(PROP_DB_URL));
dataSource.setUsername(env.getProperty(PROP_DB_USER));
dataSource.setPassword(env.getProperty(PROP_DB_PASS));
return dataSource;
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory()
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan("com.sweng.giflib.model");
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
别忘了给你的项目添加hibernate依赖。
【讨论】：
【参考方案3】：在尝试将 spring boot 连接到 mysql 数据库时遇到同样的问题。
拯救我的是在我的 pom 文件中添加了正确版本的 hibernate-core。
从休眠 5.2.0 开始。不再需要休眠实体管理器。 Hibernate-core 5.2.0 在处理收集时遇到 Spring Data JPA 问题。Hibernate-core 5.2.1 如果您使用 Spring Data JPA，则 Spring Data JPA 及更高版本可以。
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version> 5.2.1.Final</version>
</dependency>
【讨论】：
对我来说，我需要添加我的 pom 中缺少的休眠依赖项（非常类似于 user9347049 的情况【参考方案4】：我收到了类似的错误消息-
需要一个名为“entityManagerFactory”的 bean，但无法找到。
经过大量谷歌搜索解决了这个问题。 我为 JPA 设置了手动配置。
@Bean
public LocalSessionFactoryBean sessionFactory()
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
return sessionFactory;
但 JPA 默认按名称“entityManagerFactory”搜索 sessionFactory 所以将我的代码更改为：
@Bean(name="entityManagerFactory")
public LocalSessionFactoryBean sessionFactory()
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
return sessionFactory;
【讨论】：
所以 bean 必须命名为“entityManagerFactory”........gaaaaaaaaaaaaaaaaa 更多春天的巫术。 :( 在我的情况下，我使用两个数据源遇到了这个问题。一个使用默认属性定义，另一个通过创建 LocalContainerEntityManagerFactoryBean 和 PlatformTransactionManager beans 以编程方式定义 另外，您可以通知 Spring Boot 您的 bean 以不同的方式命名：@EnableJpaRepositories(basePackages = "com.sweng.giflib.repository", entityManagerFactoryRef = "sessionFactory")【参考方案5】：
除了提到的建议之外，我还尝试了几种方法来删除此错误。我通过从 application.properties 中删除以下代码解决了此错误
spring.jpa.properties.hibernate.cache.use_second_level_cache=true
spring.jpa.properties.hibernate.cache.use_query_cache=false
spring.jpa.properties.hibernate.generate_statistics=false
spring.jpa.properties.hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
【讨论】：
【参考方案6】：在我的情况下，问题是在@SpringBootApplication 注释中声明的exclude = DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class，所以感谢基里尔西蒙诺夫的提示，我解决了整天寻找和打破头脑的问题。经过数小时的尝试，删除它对我来说效果非常好。其他一切都很好，@Service、@Autowired、@EnableAutoConfiguration 和 @ComponentScan 在这个 Spring Boot 版本中是多余的，所以真的有很多时间在互联网上尝试提示。
我使用的是spring boot 2.1.11.RELEASE版本。
编程是一件很有趣的事情，一旦我使用排除解决方案来解决错误消息，那么现在的问题就是同样的事情。所以没有魔法咒语或公式，因为这个宇宙有很多很多不同的场景，即使它与我们之前研究的类似。
【讨论】：
【参考方案7】：对我来说，我忘记从排除项中删除 DataSourceAutoConfiguration.class。
所以这个：
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
// Main class definition
应该是：
@SpringBootApplication()
// Main class definition
【讨论】：
【参考方案8】：我遇到了问题，因为我在测试硬编码值时忘记删除我添加的注释 @SpringBootApplication(exclude = DataSourceAutoConfiguration.class )。
只需使用@SpringBootApplication
【讨论】：
【参考方案9】：在我们的例子中工作正常，但不适用于 @WebMvcTest 测试
花了一段时间才发现，但问题是：
@SpringBootApplication
@ComponentScan("com.givenproject")
@EntityScan("com.givenproject")
@EnableJpaRepositories("com.givenproject")
@Configuration
public class Application
改为：
@SpringBootApplication
@Configuration
public class Application
和
@Configuration
@ComponentScan("com.givenproject")
@EntityScan(basePackages = "com.givenproject")
@EnableJpaRepositories(basePackages = "com.givenproject")
public class DataConfig
【讨论】：
【参考方案10】：就我而言，我删除了 mysql 连接器的版本并让 spring boot 处理它。它奏效了。
【讨论】：
【参考方案11】：通过移除 jooq 依赖解决了一个问题：
implementation("org.springframework.boot:spring-boot-starter-jooq")
【讨论】：
那一行是您删除还是添加的？ 移除了依赖以上是关于Spring-boot：需要一个找不到的名为“entityManagerFactory”的bean的主要内容，如果未能解决你的问题，请参考以下文章
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