为什么添加@EnableAutoConfiguration到以下 spring-boot 应用程序会导致它无法创建entityManagerFactory？如果我删除@EnableAutoConfiguration一切正常。任何人都可以阐明这种行为吗？
package test.builder;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import test.builder.jpa.entity.Builder;
import test.builder.jpa.repository.BuilderRepository;
@Configuration
// @EnableAutoConfiguration
@EnableJpaRepositories("test.builder")
@PropertySource("classpath:application.properties")
public class BootApp implements CommandLineRunner {
private static Logger logger = LoggerFactory.getLogger(BootApp.class);
@Value("${spring.datasource.driverClassName}")
private String databaseDriverClassName;
@Value("${spring.datasource.url}")
private String datasourceUrl;
@Value("${spring.datasource.username}")
private String databaseUsername;
@Value("${spring.datasource.password}")
private String databasePassword;
@Bean
public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
@Bean
public DataSource dataSource() {
org.apache.tomcat.jdbc.pool.DataSource ds = new org.apache.tomcat.jdbc.pool.DataSource();
ds.setDriverClassName(databaseDriverClassName);
ds.setUrl(datasourceUrl);
ds.setUsername(databaseUsername);
ds.setPassword(databasePassword);
return ds;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource,
JpaVendorAdapter jpaVendorAdapter) {
LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
lef.setDataSource(dataSource);
lef.setJpaVendorAdapter(jpaVendorAdapter);
lef.setPackagesToScan("test.builder");
return lef;
}
@Bean
public JpaVendorAdapter jpaVendorAdapter() {
HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
hibernateJpaVendorAdapter.setShowSql(true);
hibernateJpaVendorAdapter.setGenerateDdl(false);
hibernateJpaVendorAdapter.setDatabase(Database.SQL_SERVER);
return hibernateJpaVendorAdapter;
}
@Bean
public PlatformTransactionManager transactionManager() {
return new JpaTransactionManager();
}
@Override
public void run(String... args) {
AbstractApplicationContext context = new AnnotationConfigApplicationContext(BootApp.class);
BuilderRepository repository = context.getBean(BuilderRepository.class);
Builder builder = repository.findOne(10);
logger.info("Retrieved ", builder.toString());
context.close();
}
public static void main(String[] args) {
SpringApplication.run(BootApp.class, args);
}
}
潜在的错误是
Unable to find JPA packages to scan, please define a @ComponentScan annotation or disable JpaAutoConfiguration
完整的输出（包括堆栈跟踪）是 -
14:53:50,842 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
14:53:50,843 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
14:53:50,991 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
14:53:50,997 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT]
14:53:51,017 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
14:53:51,114 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
14:53:51,114 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT]
14:53:51,115 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
14:53:51,117 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@5ece2187 - Registering current configuration as safe fallback point
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v0.5.0.M6)
14:53:51,849 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
14:53:51,854 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT]
14:53:51,854 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
14:53:51,855 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
14:53:51,856 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT]
14:53:51,856 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
14:53:51,856 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@722b9406 - Registering current configuration as safe fallback point
14:53:51.945 INFO o.s.c.a.AnnotationConfigApplicationContext - Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@6490832e: startup date [Thu Dec 19 14:53:51 GMT 2013]; root of context hierarchy
14:53:52.829 INFO o.s.b.f.s.DefaultListableBeanFactory - Overriding bean definition for bean 'transactionManager': replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=bootApp; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in class test.builder.BootApp] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]]
14:53:52.830 INFO o.s.b.f.s.DefaultListableBeanFactory - Overriding bean definition for bean 'entityManagerFactory': replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=bootApp; factoryMethodName=entityManagerFactory; initMethodName=null; destroyMethodName=(inferred); defined in class test.builder.BootApp] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; factoryMethodName=entityManagerFactory; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]]
14:53:52.830 INFO o.s.b.f.s.DefaultListableBeanFactory - Overriding bean definition for bean 'jpaVendorAdapter': replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=bootApp; factoryMethodName=jpaVendorAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class test.builder.BootApp] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration; factoryMethodName=jpaVendorAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]]
Exception in thread "main" 14:53:53.382 INFO o.s.b.a.AutoConfigurationReportLoggingInitializer$AutoConfigurationReportLogger -
=========================
AUTO-CONFIGURATION REPORT
=========================
Positive matches:
-----------------
MessageSourceAutoConfiguration
- @ConditionalOnMissingBean (types: org.springframework.context.MessageSource; SearchStrategy: all) found no beans (OnBeanCondition)
AopAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.context.annotation.EnableAspectJAutoProxy,org.aspectj.lang.annotation.Aspect,org.aspectj.lang.reflect.Advice (OnClassCondition)
- SpEL expression on org.springframework.boot.autoconfigure.aop.AopAutoConfiguration: #{true} (OnExpressionCondition)
- @ConditionalOnClass classes found: org.springframework.context.annotation.EnableAspectJAutoProxy,org.aspectj.lang.annotation.Aspect,org.aspectj.lang.reflect.Advice (OnClassCondition)
- SpEL expression on org.springframework.boot.autoconfigure.aop.AopAutoConfiguration: #{true} (OnExpressionCondition)
AopAutoConfiguration.JdkDynamicAutoProxyConfiguration
- SpEL expression on org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$JdkDynamicAutoProxyConfiguration: #{!false} (OnExpressionCondition)
- SpEL expression on org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$JdkDynamicAutoProxyConfiguration: #{!false} (OnExpressionCondition)
DataSourceAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType (OnClassCondition)
- @ConditionalOnClass classes found: org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType (OnClassCondition)
DataSourceAutoConfiguration.JdbcTemplateConfiguration
- existing auto database detected (DataSourceAutoConfiguration.DatabaseCondition)
- existing auto database detected (DataSourceAutoConfiguration.DatabaseCondition)
DataSourceAutoConfiguration.JdbcTemplateConfiguration#jdbcTemplate
- @ConditionalOnMissingBean (types: org.springframework.jdbc.core.JdbcOperations; SearchStrategy: all) found no beans (OnBeanCondition)
DataSourceAutoConfiguration.JdbcTemplateConfiguration#namedParameterJdbcTemplate
- @ConditionalOnMissingBean (types: org.springframework.jdbc.core.namedparam.NamedParameterJdbcOperations; SearchStrategy: all) found no beans (OnBeanCondition)
DataSourceTransactionManagerAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.jdbc.core.JdbcTemplate,org.springframework.transaction.PlatformTransactionManager (OnClassCondition)
- @ConditionalOnClass classes found: org.springframework.jdbc.core.JdbcTemplate,org.springframework.transaction.PlatformTransactionManager (OnClassCondition)
HibernateJpaAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean,org.springframework.transaction.annotation.EnableTransactionManagement,javax.persistence.EntityManager,org.hibernate.ejb.HibernateEntityManager (OnClassCondition)
- @ConditionalOnClass classes found: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean,org.springframework.transaction.annotation.EnableTransactionManagement,javax.persistence.EntityManager,org.hibernate.ejb.HibernateEntityManager (OnClassCondition)
- @ConditionalOnBean (types: javax.sql.DataSource; SearchStrategy: all) found the following [dataSource] (OnBeanCondition)
ServerPropertiesAutoConfiguration#serverProperties
- @ConditionalOnMissingBean (types: org.springframework.boot.context.embedded.properties.ServerProperties; SearchStrategy: all) found no beans (OnBeanCondition)
Negative matches:
-----------------
PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer
- @ConditionalOnMissingBean (types: org.springframework.context.support.PropertySourcesPlaceholderConfigurer; SearchStrategy: current) found the following [placeHolderConfigurer] (OnBeanCondition)
RabbitAutoConfiguration
- required @ConditionalOnClass classes not found: org.springframework.amqp.rabbit.core.RabbitTemplate,com.rabbitmq.client.Channel (OnClassCondition)
AopAutoConfiguration.CglibAutoProxyConfiguration
- SpEL expression on org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$CglibAutoProxyConfiguration: #{false} (OnExpressionCondition)
BatchAutoConfiguration
- required @ConditionalOnClass classes not found: org.springframework.batch.core.launch.JobLauncher (OnClassCondition)
JpaRepositoriesAutoConfiguration
- @ConditionalOnClass classes found: org.springframework.data.jpa.repository.JpaRepository (OnClassCondition)
- @ConditionalOnMissingBean (types: org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean; SearchStrategy: all) found the following [&builderRepository] (OnBeanCondition)
JpaRepositoriesAutoConfiguration.JpaWebConfiguration
- web application classes not found (OnWebApplicationCondition)
MongoRepositoriesAutoConfiguration
- required @ConditionalOnClass classes not found: com.mongodb.Mongo,org.springframework.data.mongodb.repository.MongoRepository (OnClassCondition)
DataSourceAutoConfiguration.DbcpConfiguration
- tomcat DataSource (DataSourceAutoConfiguration.BasicDatabaseCondition)
DataSourceAutoConfiguration.EmbeddedConfiguration
- existing non-embedded database detected (DataSourceAutoConfiguration.EmbeddedDatabaseCondition)
DataSourceAutoConfiguration.TomcatConfiguration
- found database driver com.microsoft.sqlserver.jdbc.SQLServerDriver (DataSourceAutoConfiguration.TomcatDatabaseCondition)
- found database driver com.microsoft.sqlserver.jdbc.SQLServerDriver (DataSourceAutoConfiguration.TomcatDatabaseCondition)
- @ConditionalOnMissingBean (types: javax.sql.DataSource; SearchStrategy: all) found the following [dataSource] (OnBeanCondition)
DataSourceTransactionManagerAutoConfiguration#transactionManager
- @ConditionalOnMissingBean (names: transactionManager; SearchStrategy: all) found the following [transactionManager] (OnBeanCondition)
JmsTemplateAutoConfiguration
- required @ConditionalOnClass classes not found: org.springframework.jms.core.JmsTemplate,javax.jms.ConnectionFactory (OnClassCondition)
DeviceResolverAutoConfiguration
- required @ConditionalOnClass classes not found: org.springframework.mobile.device.DeviceResolverHandlerInterceptor,org.springframework.mobile.device.DeviceHandlerMethodArgumentResolver (OnClassCondition)
JpaBaseConfiguration.JpaWebConfiguration
- web application classes not found (OnWebApplicationCondition)
ReactorAutoConfiguration
- required @ConditionalOnClass classes not found: reactor.spring.context.config.EnableReactor (OnClassCondition)
ThymeleafAutoConfiguration
- required @ConditionalOnClass classes not found: org.thymeleaf.spring3.SpringTemplateEngine (OnClassCondition)
DispatcherServletAutoConfiguration
- web application classes not found (OnWebApplicationCondition)
EmbeddedServletContainerAutoConfiguration
- web application classes not found (OnWebApplicationCondition)
MultipartAutoConfiguration
- required @ConditionalOnClass classes not found: javax.servlet.Servlet,org.springframework.web.multipart.support.StandardServletMultipartResolver (OnClassCondition)
WebMvcAutoConfiguration
- web application classes not found (OnWebApplicationCondition)
WebSocketAutoConfiguration
- required @ConditionalOnClass classes not found: org.springframework.web.socket.WebSocketHandler (OnClassCondition)
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory()] threw exception; nested exception is java.lang.IllegalArgumentException: Unable to find JPA packages to scan, please define a @ComponentScan annotation or disable JpaAutoConfiguration
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:584)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1089)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:984)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:296)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:552)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:293)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:749)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:738)
at test.builder.BootApp.main(BootApp.java:104)
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory()] threw exception; nested exception is java.lang.IllegalArgumentException: Unable to find JPA packages to scan, please define a @ComponentScan annotation or disable JpaAutoConfiguration
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:573)
... 16 more
Caused by: java.lang.IllegalArgumentException: Unable to find JPA packages to scan, please define a @ComponentScan annotation or disable JpaAutoConfiguration
at org.springframework.util.Assert.notEmpty(Assert.java:268)
at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.getPackagesToScan(JpaBaseConfiguration.java:109)
at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory(JpaBaseConfiguration.java:76)
at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration$$EnhancerByCGLIB$$7973d544.CGLIB$entityManagerFactory$4(<generated>)
at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration$$EnhancerByCGLIB$$7973d544$$FastClassByCGLIB$$360fed5a.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:334)
at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration$$EnhancerByCGLIB$$7973d544.entityManagerFactory(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
... 17 more
Pom提取物 -
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>0.5.0.M6</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4.0</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
</dependencies>
任何建议表示赞赏。