BeanInstantiationException：无法实例化[org.hibernate.SessionFactory]：涉及包含bean的循环引用 [英] BeanInstantiationException: Failed to instantiate [org.hibernate.SessionFactory]: Circular reference involving containing bean
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问题描述
我使用了一个来自互联网的例子，然后尝试从Spring Boot 1.5.10.RELEASE升级到2.0.0.RC1。该应用程序适用于Spring Boot
版本1.5.10.RELEASE，但它与2.0.0.RC1版本存在错误。
项目目录结构：
源代码： https://github.com/donhuvy/sample_boot3
文件 pom.xml
< project xmlns =http://maven.apache.org/POM/4.0.0xmlns：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> com.example< / groupId>
< artifactId> spring_boot_hibernate< / artifactId>
< version> 1.0.0-SNAPSHOT< / version>
<包装>战争< / packaging>
<属性>
< start-class> spring-boot-example.Application< / start-class>
< / properties>
< parent>
< groupId> org.springframework.boot< / groupId>
< artifactId> spring-boot-starter-parent< / artifactId>
<！ - < version> 1.5.10.RELEASE< / version> - >
< version> 2.0.0.RC1< / version>
< / parent>
<依赖关系>
< dependency>
< groupId> org.springframework.boot< / groupId>
< artifactId> spring-boot-starter-web< / artifactId>
< /依赖关系>
< dependency>
< groupId> org.springframework.boot< / groupId>
< artifactId> spring-boot-starter-tomcat< / artifactId>
< /依赖关系>
< dependency>
< groupId> mysql< / groupId>
< artifactId> mysql-connector-java< / artifactId>
< /依赖关系>
< dependency>
< groupId> org.springframework.boot< / groupId>
< artifactId> spring-boot-starter-data-jpa< / artifactId>
<排除项>
<排除>
< groupId> org.apache.tomcat< / groupId>
< artifactId> tomcat-jdbc< / artifactId>
< /排除>
< /排除>
< /依赖关系>
< dependency>
< groupId> commons-dbcp< / groupId>
< artifactId> commons-dbcp< / artifactId>
< /依赖关系>
< /依赖关系>
< repositories>
< repository>
< id> spring-repo< / id>
< name> Spring存储库< /名称>
< url> https：//repo.spring.io/release< / url>
< / repository>
< repository>
< id> spring-snapshot< / id>
< name> Spring Snapshot Repository< / name>
< url> https：//repo.spring.io/snapshot< / url>
<快照>
< enabled> true< / enabled>
< / snapshots>
< / repository>
< repository>
< id> spring-milestone< / id>
<名称> Spring Milestone存储库< /名称>
< url> https：//repo.spring.io/milestone< / url>
< / repository>
< / repositories>
< / project>
文件 application.properties
server.port = 8081
spring.datasource.url = jdbc：mysql：// localhost：3306 / vy
spring。 datasource.username = root
spring.datasource.password = 123456
＃保持连接长时间闲置（生产中需要）
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto =更新
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect
文件 BeanConfig.java
package com.example;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManagerFactory;
@Configuration
public class BeanConfig {
@Autowired
private EntityManagerFactory entityManagerFactory;
$Be $ b $ public SessionFactory getSessionFactory（）{
if（entityManagerFactory.unwrap（SessionFactory.class）== null）{
throw new NullPointerException（factory is不是休眠工厂）;
}
return entityManagerFactory.unwrap（SessionFactory.class）;
}
}
错误发生在行：
if（entityManagerFactory.unwrap（SessionFactory.class）== null）{
文件 UserController.java
package com.example.controller;
import com.example.model.UserDetails;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping（value =/ list，method = RequestMethod.GET）
public ResponseEntity< List< UserDetails>> userDetails（）{
List< UserDetails> userDetails = userService.getUserDetails（）;
返回新的ResponseEntity< List< UserDetails>>（userDetails，HttpStatus.OK）;
}
}
文件 UserDaoImpl.java
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
公开列表< UserDetails> getUserDetails（）{
Criteria criteria = sessionFactory.openSession（）。createCriteria（UserDetails.class）;
return criteria.list（）;
}
}
文件 UserDao.java
package com.example.dao;
import com.example.model.UserDetails;
import java.util.List;
public interface UserDao {
List< UserDetails> getUserDetails（）;
文件 UserDetails.java
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table
public class UserDetails {
@Id
@Column
@GeneratedValue（strategy = GenerationType .IDENTITY）
private int id;
@Column
private String firstName;
@Column
private String lastName;
@Column
私人字符串电子邮件;
@Column
私人字符串密码;
public int getId（）{
return id;
}
public void setId（int id）{
this.id = id;
}
public String getFirstName（）{
return firstName;
}
public void setFirstName（String firstName）{
this.firstName = firstName;
}
public String getLastName（）{
return lastName;
}
public void setLastName（String lastName）{
this.lastName = lastName;
}
public String getEmail（）{
return email;
}
public void setEmail（String email）{
this.email = email;
}
public String getPassword（）{
return password;
}
public void setPassword（String password）{
this.password = password;
}
}
文件 UserServiceImpl.java
package com.example.service.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
$ b $ @Autowired
private UserDao userDao;
公开列表< UserDetails> getUserDetails（）{
return userDao.getUserDetails（）;
$ b code
$ b 错误（全部内容： https://gist.github.com/donhuvy/a0199d73d660442a8e595a05963e7b8f ）
/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home/bin/java -agentlib：jdwp = transport = dt_socket ，address = 127.0.0.1：49901，suspend = y，server = n --illegal-access = warn -XX：TieredStopAtLevel = 1 -noverify -Dspring.output.ansi.enabled = always --Dcom.sun.management.jmxremote - Dcom.sun.management.jmxremote.port = 49900 -Dcom.sun.management.jmxremote.authenticate = false -Dcom.sun.management.jmxremote.ssl = false -Djava.rmi.server.hostname = 127.0.0.1 -Dspring。 liveBeansView.mbeanDomain -Dspring.application.admin.enabled = true -javaagent：/Users/donhuvy/Library/Caches/IntelliJIdea2017.3/captureAgent/debugger -...
警告：org.springframework非法反射访问。 cglib.core.ReflectUtils $ 1（文件：/Users/donhuvy/.m2 /repository/org/springframework/spring-core/5.0.3.RELEASE/spring-core-5.0.3.RELEASE.jar）转换为方法java.lang.ClassLoader.defineClass（java.lang.String，byte []，int ，int，java.security.ProtectionDomain）
2018-02-20 07：56：04.273信息1944 --- [main] trationDelegate $ BeanPostProcessorChecker：Bean的'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration'类型[ org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration $$ EnhancerBySpringCGLIB $$ 1e62766c]没有资格被所有BeanPostProcessors处理（例如：不适合自动代理）
.... 2018-02-20 07：56：04.538信息1944 --- [main]
ConditionEvaluationReportLoggingListener：
启动ApplicationContext时出错。要显示条件报告，请在启用调试的情况下重新运行您的应用程序。
2018-02-20 07：56：04.848错误1944 --- [main] osboot.SpringApplication：应用程序运行失败
org.springframework.beans.factory.UnsatisfiedDependencyException：创建错误名称为beanConfig的bean：通过字段'entityManagerFactory'表示的不满意的依赖关系;嵌套的异常是org.springframework.beans.factory.BeanCreationException：在类路径资源[com / example / BeanConfig.class]中定义名称为'getSessionFactory'的bean时出错：通过工厂方法的Bean实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化[org.hibernate.SessionFactory]：涉及包含bean'beanConfig'的循环引用 - 考虑将工厂方法声明为静态，以便与其包含的实例无关。工厂方法'getSessionFactory'抛出异常;嵌套异常是java.lang.NullPointerException
在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:587）〜[spring-beans-5.0.3.RELEASE.jar：5.0 .3.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:91）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
。在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:373）〜[弹簧豆-5.0.3.RELEASE.jar：5.0.3.RELEASE]
。在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1344）〜[弹簧豆-5.0.3.RELEASE.jar：5.0.3.RELEASE]
。在org.springframework.beans .factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:582）〜[spring-beans-5 .0.3.RELEASE.jar：5.0.3.RELEASE]在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:502）
〜[弹簧豆-5.0.3.RELEASE。 jar：5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:312）〜[spring-beans-5.0.3.RELEASE.jar： 5.0.3.RELEASE]
在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE ]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:310）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
在org.springframework处使用org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:200）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
。 beans.factory.support.DefaultListableBeanFactory.preInstantiateSing letons（DefaultListableBeanFactory.java:761）〜[弹簧豆-5.0.3.RELEASE.jar：5.0.3.RELEASE]在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization
（AbstractApplicationContext.java:868 ）〜[spring-context-5.0.3.RELEASE.jar：5.0.3.RELEASE]
在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:549）〜[spring-context- 5.0.3.RELEASE.jar：5.0.3.RELEASE]
在org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:138）〜[spring-boot-2.0.0 .RC1.jar：2.0.0.RC1]
at org.springframework.boot.SpringApplication.refresh（SpringApplication.java:752）[spring-boot-2.0.0.RC1.jar：2.0.0.RC1 ]
at org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:388）[spring-boot-2.0.0.RC1.jar：2.0.0.RC1]
at org.springframework。 boot.SpringApplication.run（SpringApplication.java:327）[spring- boot-2.0.0.RC1.jar：2.0.0.RC1]
at org.springframework.boot.SpringApplication.run（SpringApplication.java:1246）[spring-boot-2.0.0.RC1.jar： 2.0.0.RC1]
at org.springframework.boot.SpringApplication.run（SpringApplication.java:1234）[spring-boot-2.0.0.RC1.jar：2.0.0.RC1]
在com.example.Application.main（Application.java:10）[classes /：na]
引起的：org.springframework.beans.factory.BeanCreationException：在类路径中定义名称为'getSessionFactory'的Bean时创建错误资源[com / example / BeanConfig.class]：通过工厂方法的Bean实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化[org.hibernate.SessionFactory]：涉及包含bean'beanConfig'的循环引用 - 考虑将工厂方法声明为静态，以便与其包含的实例无关。工厂方法'getSessionFactory'抛出异常;嵌套异常是java.lang.NullPointerException
在org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod（ConstructorResolver.java:587）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3 .RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod（AbstractAutowireCapableBeanFactory.java:1250）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE] $ b在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1099）$ b〜[弹簧豆-5.0.3.RELEASE.jar：5.0.3.RELEASE]在有机
。 springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:545）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.beans.factory .AutomationAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:502）〜[spring-bea ns-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:312）〜[spring-beans- 5.0.3.RELEASE.jar：5.0.3.RELEASE]
在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）〜[spring-beans-5.0.3.RELEASE .jar：5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:310）〜[spring-beans-5.0.3.RELEASE.jar：5.0。 3.RELEASE]
在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:200）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate（DependencyDescriptor.java:251）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org .springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBe anFactory.java:1138）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1065 ）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:584）〜[ spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
... 19常见框架省略
引起：org.springframework.beans.BeanInstantiationException：无法实例化[org。 hibernate.SessionFactory]：涉及包含bean'beanConfig'的循环引用 - 考虑将工厂方法声明为独立于其包含实例的静态方法。工厂方法'getSessionFactory'抛出异常;嵌套异常是java.lang.NullPointerException
在org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:185）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3 .RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod（ConstructorResolver.java:579）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
...省略了31个常见框架
引起：java.lang.NullPointerException：null
at com.example.BeanConfig.getSessionFactory（BeanConfig.java:18）〜[classes /：na]
at com.example.BeanConfig $$ EnhancerBySpringCGLIB $$ 54b5def4.CGLIB $ getSessionFactory $ 0（< generated>）〜[classes /：na]
at com.example.BeanConfig $$ EnhancerBySpringCGLIB $$ 54b5def4 $ $ FastClassBySpringCGLIB $$ bcb3b797.invoke（< generated>）〜[classes /：na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper（MethodProxy.java:228）〜[spring-core-5.0 .3.RELEASE.jar：5.0.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer $ BeanMethodInterceptor.intercept（ConfigurationClassEnhancer.java:361）〜[spring-context-5.0.3.RELEASE.jar：5.0.3.RELEASE]
at com.example.BeanConfig $$ EnhancerBySpringCGLIB $$ 54b5def4.getSessionFactory（< generated>）〜[classes /：na]
at java.base / jdk.internal.reflect.NativeMethodAccessorImpl.invoke0（Native Method）〜[ na：na]
在java.base / jdk.internal.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）〜[na：na]
在java.base / jdk.internal.reflect。 DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）〜[na：na]
在java.base / java.lang.reflect.Method.invoke（Method.java:564）〜[na：na]
在org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:154）〜[spring-beans-5.0.3.RELEASE.jar：5.0.3.RELEASE]
... 32常见框架省略
与目标V断开M，地址：'127.0.0.1:49901'，运输：'套接字'
处理完成退出代码1
如何解决它？
解决方案 文件 BeanConfig.java
package com.example;
import org.hibernate.SessionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
@Configuration
public class BeanConfig {
@PersistenceUnit
EntityManagerFactory entityManagerFactory;
$Be $ b $ public SessionFactory getSessionFactory（）{
if（entityManagerFactory.unwrap（SessionFactory.class）== null）{
throw new NullPointerException（factory is不是休眠工厂）;
}
return entityManagerFactory.unwrap（SessionFactory.class）;
}
}
使用方法 getSessionFactory
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
公开列表< UserDetails> getUserDetails（）{
Criteria criteria = sessionFactory.openSession（）。createCriteria（UserDetails.class）;
return criteria.list（）;
$ b $ / code $ / pre
$ b $（这是一个有效的例子， Hibernate 5.2.13.Final，Spring Boot 2.0.0.RC2和Java 9.0.4）
I use an example from internet, then try to upgrade from Spring Boot 1.5.10.RELEASE to 2.0.0.RC1. The application works ok with Spring Boot
version 1.5.10.RELEASE, but it has error with version 2.0.0.RC1.
Project directory structure:
source code: https://github.com/donhuvy/sample_boot3
File pom.xml
<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>com.example</groupId>
<artifactId>spring_boot_hibernate</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<start-class>spring-boot-example.Application</start-class>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<!--<version>1.5.10.RELEASE</version>-->
<version>2.0.0.RC1</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-repo</id>
<name>Spring Repository</name>
<url>https://repo.spring.io/release</url>
</repository>
<repository>
<id>spring-snapshot</id>
<name>Spring Snapshot Repository</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
File application.properties
server.port=8081
spring.datasource.url=jdbc:mysql://localhost:3306/vy
spring.datasource.username=root
spring.datasource.password=123456
# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
File BeanConfig.java
package com.example;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManagerFactory;
@Configuration
public class BeanConfig {
@Autowired
private EntityManagerFactory entityManagerFactory;
@Bean
public SessionFactory getSessionFactory() {
if (entityManagerFactory.unwrap(SessionFactory.class) == null) {
throw new NullPointerException("factory is not a hibernate factory");
}
return entityManagerFactory.unwrap(SessionFactory.class);
}
}
The error happen at line:
if (entityManagerFactory.unwrap(SessionFactory.class) == null) {
File UserController.java
package com.example.controller;
import com.example.model.UserDetails;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "/list", method = RequestMethod.GET)
public ResponseEntity<List<UserDetails>> userDetails() {
List<UserDetails> userDetails = userService.getUserDetails();
return new ResponseEntity<List<UserDetails>>(userDetails, HttpStatus.OK);
}
}
File UserDaoImpl.java
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
public List<UserDetails> getUserDetails() {
Criteria criteria = sessionFactory.openSession().createCriteria(UserDetails.class);
return criteria.list();
}
}
File UserDao.java
package com.example.dao;
import com.example.model.UserDetails;
import java.util.List;
public interface UserDao {
List<UserDetails> getUserDetails();
}
File UserDetails.java
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table
public class UserDetails {
@Id
@Column
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@Column
private String firstName;
@Column
private String lastName;
@Column
private String email;
@Column
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
File UserServiceImpl.java
package com.example.service.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
public List<UserDetails> getUserDetails() {
return userDao.getUserDetails();
}
}
Error (full content: https://gist.github.com/donhuvy/a0199d73d660442a8e595a05963e7b8f )
/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home/bin/java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:49901,suspend=y,server=n --illegal-access=warn -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=49900 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=127.0.0.1 -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -javaagent:/Users/donhuvy/Library/Caches/IntelliJIdea2017.3/captureAgent/debugger-...
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/Users/donhuvy/.m2/repository/org/springframework/spring-core/5.0.3.RELEASE/spring-core-5.0.3.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
2018-02-20 07:56:04.273 INFO 1944 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$1e62766c] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
.... 2018-02-20 07:56:04.538 INFO 1944 --- [ main]
ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-02-20 07:56:04.848 ERROR 1944 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'beanConfig': Unsatisfied dependency expressed through field 'entityManagerFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in class path resource [com/example/BeanConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.hibernate.SessionFactory]: Circular reference involving containing bean 'beanConfig' - consider declaring the factory method as static for independence from its containing instance. Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:138) ~[spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388) [spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234) [spring-boot-2.0.0.RC1.jar:2.0.0.RC1]
at com.example.Application.main(Application.java:10) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in class path resource [com/example/BeanConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.hibernate.SessionFactory]: Circular reference involving containing bean 'beanConfig' - consider declaring the factory method as static for independence from its containing instance. Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
... 19 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.hibernate.SessionFactory]: Circular reference involving containing bean 'beanConfig' - consider declaring the factory method as static for independence from its containing instance. Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
... 31 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.example.BeanConfig.getSessionFactory(BeanConfig.java:18) ~[classes/:na]
at com.example.BeanConfig$$EnhancerBySpringCGLIB$$54b5def4.CGLIB$getSessionFactory$0(<generated>) ~[classes/:na]
at com.example.BeanConfig$$EnhancerBySpringCGLIB$$54b5def4$$FastClassBySpringCGLIB$$bcb3b797.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.3.RELEASE.jar:5.0.3.RELEASE]
at com.example.BeanConfig$$EnhancerBySpringCGLIB$$54b5def4.getSessionFactory(<generated>) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.3.RELEASE.jar:5.0.3.RELEASE]
... 32 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:49901', transport: 'socket'
Process finished with exit code 1
How to fix it?
解决方案 File BeanConfig.java
package com.example;
import org.hibernate.SessionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
@Configuration
public class BeanConfig {
@PersistenceUnit
EntityManagerFactory entityManagerFactory;
@Bean
public SessionFactory getSessionFactory() {
if (entityManagerFactory.unwrap(SessionFactory.class) == null) {
throw new NullPointerException("factory is not a hibernate factory");
}
return entityManagerFactory.unwrap(SessionFactory.class);
}
}
An example about using method getSessionFactory
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
public List<UserDetails> getUserDetails() {
Criteria criteria = sessionFactory.openSession().createCriteria(UserDetails.class);
return criteria.list();
}
}
(It is a working example with Hibernate 5.2.13.Final, Spring Boot 2.0.0.RC2, and Java 9.0.4)
这篇关于BeanInstantiationException：无法实例化[org.hibernate.SessionFactory]：涉及包含bean的循环引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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