我试图使用注释（没有xml）从外部属性文件配置sessionfactory和数据源配置详细信息但是我得到了以下异常。
@Value("${hibernate.dialect}")
private String hibernateDialect;
@Value("${hibernate.show_sql}")
private String hibernateShowSql;
@Value("${hibernate.hbm2ddl.auto}")
private String hibernateHbm2ddlAuto;
@Value("${hibernate.driverClassName}")
private String driverClassName;
@Value("${hibernate.url}")
private String url;
@Value("${hibernate.username}")
private String username;
@Value("${hibernate.password}")
private String password;
@Bean
public PropertyPlaceholderConfigurer getPropertyPlaceholderConfigurer()
{
PropertyPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertyPlaceholderConfigurer();
propertyPlaceholderConfigurer.setLocation(new ClassPathResource("hibernate.properties"));
propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
return propertyPlaceholderConfigurer;
}
@Bean()
public DataSource getDataSource() {
System.out.println("**"+driverClassName+"&&"+url+"***"+username+"%%%"+password);
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverClassName);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory sessionFactory)
{
HibernateTransactionManager hibernateTransactionManager = new HibernateTransactionManager();
hibernateTransactionManager.setSessionFactory(sessionFactory);
return hibernateTransactionManager;
}
@Bean
@Autowired
public HibernateTemplate getHibernateTemplate(SessionFactory sessionFactory)
{
HibernateTemplate hibernateTemplate = new HibernateTemplate(sessionFactory);
return hibernateTemplate;
}
@Bean
public LocalSessionFactoryBean sessionFactory()
{
LocalSessionFactoryBean localSessionFactoryBean = new LocalSessionFactoryBean();
localSessionFactoryBean.setDataSource(getDataSource());
localSessionFactoryBean.setHibernateProperties(getHibernateProperties());
localSessionFactoryBean.setPackagesToScan(new String[]{"com.foodeebuddee"});
return localSessionFactoryBean;
}
@Bean
public Properties getHibernateProperties()
{
System.out.println("**"+hibernateDialect+"&&"+hibernateShowSql+"***"+hibernateHbm2ddlAuto);
Properties properties = new Properties();
properties.put("hibernate.dialect", hibernateDialect);
properties.put("hibernate.show_sql", hibernateShowSql);
properties.put("hibernate.hbm2ddl.auto", hibernateHbm2ddlAuto);
return properties;
}
我得到了例外。
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [com/foodeebuddee/Application.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.hibernate4.LocalSessionFactoryBean com.foodeebuddee.Application.sessionFactory()] threw exception; nested exception is java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
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.getSingletonFactoryBeanForTypeCheck(AbstractAutowireCapableBeanFactory.java:840)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:771)
at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:539)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:384)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:353)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:463)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:456)
at org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration$EmbeddedServletContainerCustomizerBeanPostProcessorRegistrar.registerBeanDefinitions(EmbeddedServletContainerAutoConfiguration.java:110)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:317)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:139)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:116)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:240)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:254)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:94)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:609)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
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 com.foodeebuddee.Application.main(Application.java:191)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.hibernate4.LocalSessionFactoryBean com.foodeebuddee.Application.sessionFactory()] threw exception; nested exception is java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:573)
... 30 more
Caused by: java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
at org.springframework.util.Assert.hasText(Assert.java:162)
at org.springframework.jdbc.datasource.DriverManagerDataSource.setDriverClassName(DriverManagerDataSource.java:124)
at com.foodeebuddee.Application.getDataSource(Application.java:111)
at com.foodeebuddee.Application.sessionFactory(Application.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
... 31 more
任何建议表示赞赏。
答案 0 :(得分：2)
解决方案是错误本身::::
com.foodeebuddee.Application.sessionFactory（）]抛出异常;嵌套 异常是java.lang.IllegalArgumentException：属性 'driverClassName'不能为空 org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:188）
提供合适的driverClassName，例如com.mysql.jdbc.Driver
答案 1 :(得分：0)
driverClassName对于在Spring中创建会话工厂是必不可少的，但是它的值是空的，首先你可以做更多的日志记录，看看为什么driverClassName的值没有来。
答案 2 :(得分：0)
getPropertyPlaceholderConfigurer()方法应该是静态的。
可以找到更多详细信息here