Spring里面的SessionFactory一般如下配备在xml中：
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation"
value="classpath:hibernate.cfg.xml">
</property>
</bean>
此处我们可以看到我们配置的Sessionfactory，但是class却是LocalSessionFactoryBean，和我们需要的貌似不符，实际上由于LocalSessionFactoryBean实现了
FactoryBean
这个类，Spring中会在你调用Sessionfactory的时候通过调用LocalSessionFactoryBean.getObject来返回Sessionfactory。
以下是硬编码的方式获取sessionfactory：
public class ApplicationConfig {@Autowiredprivate Environment env;@Beanpublic SessionFactory sessionFactory() throws IOException { LocalSessionFactoryBean bean = new LocalSessionFactoryBean(); bean.setDataSource(dataSource()); bean.setPackagesToScan(new String[] { "com.publiccms.entities" }); Properties hibernateProperties = new Properties(); hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect")); hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql")); hibernateProperties.setProperty("hibernate.query.substitutions", env.getProperty("hibernate.query.substitutions")); hibernateProperties.setProperty("hibernate.jdbc.fetch_size", env.getProperty("hibernate.jdbc.fetch_size")); hibernateProperties.setProperty("hibernate.jdbc.batch_size", env.getProperty("hibernate.jdbc.batch_size")); hibernateProperties.setProperty("hibernate.cache.region.factory_class", env.getProperty("hibernate.cache.region.factory_class")); hibernateProperties.setProperty("hibernate.cache.use_second_level_cache", env.getProperty("hibernate.cache.use_second_level_cache")); hibernateProperties.setProperty("hibernate.cache.use_query_cache", env.getProperty("hibernate.cache.use_query_cache")); hibernateProperties.setProperty("hibernate.transaction.coordinator_class", env.getProperty("hibernate.transaction.coordinator_class")); hibernateProperties.setProperty("hibernate.cache.provider_configuration_file_resource_path", env.getProperty("hibernate.cache.provider_configuration_file_resource_path")); hibernateProperties.setProperty("hibernate.search.default.directory_provider", env.getProperty("hibernate.search.default.directory_provider")); hibernateProperties.setProperty("hibernate.search.default.indexBase", getDataFilePath() + "/indexes"); bean.setHibernateProperties(hibernateProperties); bean.afterPropertiesSet(); return bean.getObject(); }}
dbconfig.properties
jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc\:mysql\://localhost/public_cms?useUnicode\=true&characterEncoding\=UTF-8&zeroDateTimeBehavior\=roundjdbc.username=rootjdbc.password=rootcpool.checkoutTimeout=20000cpool.autoCommitOnClose=truecpool.minPoolSize=5cpool.maxPoolSize=20cpool.maxIdleTime=25cpool.maxIdleTimeExcessConnections=1800cpool.acquireIncrement=10#hibernate.dialect=com.sanluan.common.dialect.MyDialecthibernate.dialect=org.hibernate.dialect.MySQLDialecthibernate.show_sql=falsehibernate.query.substitutions=true 1, false 0hibernate.jdbc.fetch_size=50hibernate.jdbc.batch_size=50hibernate.transaction.coordinator_class=jdbchibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactoryhibernate.cache.use_second_level_cache=falsehibernate.cache.use_query_cache=truehibernate.cache.provider_configuration_file_resource_path=ehcache.xmlhibernate.search.default.directory_provider=org.hibernate.search.store.impl.FSDirectoryProvider
我们通过查看LocalSessionfactoryBean的源码，
public SessionFactory getObject() { return this.sessionFactory;} 可以看到sessionfactory是通过getObject来返回的。在对
LocalSessionFactoryBean
配置hibernateproperties之后，需要调用
afterPropertiesSet()
方法，不然sessionfactory将是空值，方法源码如下：
public void afterPropertiesSet() throws IOException { LocalSessionFactoryBuilder sfb = new LocalSessionFactoryBuilder(this.dataSource, this.resourcePatternResolver); Resource[] var2; int var3; int var4; Resource resource; if(this.configLocations != null) { var2 = this.configLocations; var3 = var2.length; for(var4 = 0; var4 < var3; ++var4) { resource = var2[var4]; sfb.configure(resource.getURL()); } } if(this.mappingResources != null) { String[] var7 = this.mappingResources; var3 = var7.length; for(var4 = 0; var4 < var3; ++var4) { String var8 = var7[var4]; ClassPathResource file = new ClassPathResource(var8.trim(), this.resourcePatternResolver.getClassLoader()); sfb.addInputStream(file.getInputStream()); } } if(this.mappingLocations != null) { var2 = this.mappingLocations; var3 = var2.length; for(var4 = 0; var4 < var3; ++var4) { resource = var2[var4]; sfb.addInputStream(resource.getInputStream()); } } if(this.cacheableMappingLocations != null) { var2 = this.cacheableMappingLocations; var3 = var2.length; for(var4 = 0; var4 < var3; ++var4) { resource = var2[var4]; sfb.addCacheableFile(resource.getFile()); } } if(this.mappingJarLocations != null) { var2 = this.mappingJarLocations; var3 = var2.length; for(var4 = 0; var4 < var3; ++var4) { resource = var2[var4]; sfb.addJar(resource.getFile()); } } if(this.mappingDirectoryLocations != null) { var2 = this.mappingDirectoryLocations; var3 = var2.length; for(var4 = 0; var4 < var3; ++var4) { resource = var2[var4]; File var9 = resource.getFile(); if(!var9.isDirectory()) { throw new IllegalArgumentException("Mapping directory location [" + resource + "] does not denote a directory"); } sfb.addDirectory(var9); } } if(this.entityInterceptor != null) { sfb.setInterceptor(this.entityInterceptor); } if(this.implicitNamingStrategy != null) { sfb.setImplicitNamingStrategy(this.implicitNamingStrategy); } if(this.physicalNamingStrategy != null) { sfb.setPhysicalNamingStrategy(this.physicalNamingStrategy); } if(this.jtaTransactionManager != null) { sfb.setJtaTransactionManager(this.jtaTransactionManager); } if(this.currentTenantIdentifierResolver != null) { sfb.setCurrentTenantIdentifierResolver(this.currentTenantIdentifierResolver); } if(this.entityTypeFilters != null) { sfb.setEntityTypeFilters(this.entityTypeFilters); } if(this.hibernateProperties != null) { sfb.addProperties(this.hibernateProperties); } if(this.annotatedClasses != null) { sfb.addAnnotatedClasses(this.annotatedClasses); } if(this.annotatedPackages != null) { sfb.addPackages(this.annotatedPackages); } if(this.packagesToScan != null) { sfb.scanPackages(this.packagesToScan); } this.configuration = sfb; this.sessionFactory = this.buildSessionFactory(sfb);} protected SessionFactory buildSessionFactory(LocalSessionFactoryBuilder sfb) { return sfb.buildSessionFactory();} 这样就可以获取到我们一般意义上的sessionfactory了，如果在此过程中出现class not found：org/hibernate/boot/spi/SessionFactoryOptions 可能你使用的hibernate-core的jar包版本比较低，需要更新新的jar包。