Spring Boot:创建名称为'jpaMappingContext'的bean时出错:java.lang.NullPointerException [英] Spring Boot : Error creating bean with name 'jpaMappingContext': java.lang.NullPointerException
问题描述
我的组合是Spring Boot + Spring Data Jpa + Multiple Databases.启动应用程序时,我正在遵循NullPointer异常.像用Boot加载SPring Data这样的感觉无法生成JPA元数据.我没有获得与此错误相关的任何资源.
My combination of is Spring Boot + Spring Data Jpa + Multiple Databases. I am getting following NullPointer exception when starting the application. Feels like SPring Data with Boot is not able to generate JPA Metadata. I did not get any resource related to this error.
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:736)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at com.verient.infinipay.staticcard.Application.main(Application.java:25)
... 6 more
Caused by: java.lang.NullPointerException
at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.getMetamodels(JpaMetamodelMappingContextFactoryBean.java:90)
at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.createInstance(JpaMetamodelMappingContextFactoryBean.java:56)
at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.createInstance(JpaMetamodelMappingContextFactoryBean.java:26)
at org.springframework.beans.factory.config.AbstractFactoryBean.afterPropertiesSet(AbstractFactoryBean.java:134)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
... 21 more
我的代码是:
public EntityManagerFactory apEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
return builder
.dataSource(apDataSource())
.packages(Entity1.class, Entity2.class)
.persistenceUnit("ap-persistent-unit")
.build()
.getObject();
}
@Bean
public EntityManagerFactory trEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
return builder
.dataSource(trDataSource())
.packages(Entity3.class, Entity4.class)
.persistenceUnit("tr-persistent-unit")
.build()
.getObject();
}
@Bean
JpaTransactionManager apTransactionManager(@Qualifier("apEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
@Bean
JpaTransactionManager trTransactionManager(@Qualifier("trEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
在application.properties中,我还具有以下休眠属性.
I also have following hibernate properties in application.properties.
spring.jpa.hibernate.ddl-auto: update
spring.jpa.hibernate.naming_strategy: org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.database: H2
spring.jpa.show-sql: true
推荐答案
Spring引导默认情况下为所有已在classpath上启用的数据源启用AutoConfiguration类.您应该明确排除要禁用的AutoConfiguration类.
Spring boot have AutoConfiguration classes enabled by default for the data sources allready on classpath. You should explicitly exclude AutoConfiguration class to disable.
示例:
@EnableAutoConfiguration(exclude = {JndiConnectionFactoryAutoConfiguration.class,DataSourceAutoConfiguration.class,
HibernateJpaAutoConfiguration.class,JpaRepositoriesAutoConfiguration.class,DataSourceTransactionManagerAutoConfiguration.class})
@ComponentScan
public class MyBootApplication {
public static void main(String[] args) {
SpringApplication.run(MyBootApplication.class, args);
}
}
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