Spring的sessionFactory的初级问题。

Question

从你说的问题上看出来你可能对hibernate了解还是不深刻.
 
首先给你说下Session实例创建过程
1 Configuration config = new Configuration().configure()
2 SessionFactory sessionFactory = config.buildSessionFactory()
3 Session session = sessionFactory.openSession()然后现在你用Spring进行AOP 所以这些都是互相引用reference就好了(在xml文件中进行配置)
出现上述问题就是你配置hibernate一些property时出错了,自己好好检查一下!要参考的话可以给你.

Answer 1

我给你个我们原来项目,仅供参考
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<!-- <value>oracle.jdbc.driver.OracleDriver</value>-->
<value>net.sourceforge.jtds.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:jtds:sqlserver://10.108.47.110:1433/sysdb</value>
<!-- <value>jdbc:oracle:thin:@192.168.1.254:1521:sysdb</value> -->
</property>
<property name="username">
<value>student</value>
</property>
<property name="password">
<value>student</value>
</property>
</bean> <bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
destroy-method="close">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>com/iss/isscrm/entity/Accounts.hbm.xml</value>
<value>com/iss/isscrm/entity/Accountsandrole.hbm.xml</value>
<value>com/iss/isscrm/entity/Menu.hbm.xml</value>
<value>com/iss/isscrm/entity/Role.hbm.xml</value>
<value>com/iss/isscrm/entity/Roleandmenu.hbm.xml</value>
<value>com/iss/isscrm/entity/Student.hbm.xml</value>
<value>com/iss/isscrm/entity/Enterprise.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect
</prop>
<!-- 每次运行自动创建表 -->
<!-- <prop key="hibernate.hbm2ddl.auto">create</prop>-->
<!-- 解决hql中文查询乱码问题 -->
<prop key="hibernate.query.factory_class">
org.hibernate.hql.classic.ClassicQueryTranslatorFactory
</prop>
</props>
</property>
</bean> <bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean> <bean id="IBaseDaoImpl" class="com.iss.isscrm.dao.IBaseDaoImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean> <bean id="IBaseDaoImplProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref local="transactionManager" />
</property>
<property name="proxyInterfaces">
<list>
<value>com.iss.isscrm.dao.IBaseDao</value>
</list>
</property>
<property name="target">
<ref local="IBaseDaoImpl" />
</property>
<property name="transactionAttributes">
<props> <prop key="insertObject*">PROPAGATION_REQUIRED</prop>
<prop key="deleteObject*">PROPAGATION_REQUIRED</prop>
<prop key="updateObject*">PROPAGATION_REQUIRED</prop>
<prop key="getObject*">PROPAGATION_REQUIRED</prop> <prop key="*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>

Answer 2

我那里还是有问题的。但是很奇怪，我自己做的一个登录页面中的sessionFactory = null的。（dao中有setter的）
但是能够正常查询。
下面是我那个问题程序的XML<?xml version="1.0" encoding="GB2312"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<bean name="/showAction" class="com.leonguo.struts.action.ShowAction">
<property name="showBo" ref="showBo">
</property>
</bean>

<bean id="showBo" class="com.leonguo.bo.ShowBo">
<property name="showDao">
<ref bean="showDaoProxy"/> 
</property>
</bean>

<bean id="showDao" class="com.leonguo.dao.ShowDaoImpl">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>

<bean id="dataSourse"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="com.microsoft.jdbc.sqlserver.SQLServerDriver">
</property>
<property name="url"
value="jdbc:microsoft:sqlserver://localhost:1433">
</property>
<property name="username" value="sa"></property>
<property name="password" value="sa"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >
<property name="dataSource">
<ref bean="dataSourse" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/leonguo/entity/Department.hbm.xml</value>
<value>com/leonguo/entity/Emp.hbm.xml</value>
<value>com/leonguo/entity/Mession.hbm.xml</value></list>
</property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory">
   <ref local="sessionFactory" />
  </property>
</bean>

<bean id="showDaoProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager">
   <ref bean="transactionManager" />
  </property>
  <property name="target">
   <ref local="showDao" />
  </property>
  <property name="transactionAttributes">
   <props>
     <prop key="save*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
                <prop key="add*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
                <prop key="modify*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
   </props>
  </property>
 </bean>
</beans>然后是Action:
private ShowBo showBo = null; public ShowBo getShowBo() {
return showBo;
} public void setShowBo(ShowBo showBo) {
this.showBo = showBo;
} public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) { ShowActionForm actionForm = (ShowActionForm) form;
try {
showBo.setDatasToForm(actionForm);
return mapping.findForward("success");
} catch (Exception e) {
System.out.println(e.toString());
return mapping.findForward("default");
} }

Answer 3

我那里还是有问题的。但是很奇怪，我自己做的一个登录页面中的sessionFactory = null的。（dao中有setter的）
但是能够正常查询。
下面是我那个问题程序的XML<?xml version="1.0" encoding="GB2312"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<bean name="/showAction" class="com.leonguo.struts.action.ShowAction">
<property name="showBo" ref="showBo">
</property>
</bean>

<bean id="showBo" class="com.leonguo.bo.ShowBo">
<property name="showDao">
<ref bean="showDaoProxy"/> 
</property>
</bean>

<bean id="showDao" class="com.leonguo.dao.ShowDaoImpl">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>

<bean id="dataSourse"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="com.microsoft.jdbc.sqlserver.SQLServerDriver">
</property>
<property name="url"
value="jdbc:microsoft:sqlserver://localhost:1433">
</property>
<property name="username" value="sa"></property>
<property name="password" value="sa"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >
<property name="dataSource">
<ref bean="dataSourse" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/leonguo/entity/Department.hbm.xml</value>
<value>com/leonguo/entity/Emp.hbm.xml</value>
<value>com/leonguo/entity/Mession.hbm.xml</value></list>
</property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory">
   <ref local="sessionFactory" />
  </property>
</bean>

<bean id="showDaoProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager">
   <ref bean="transactionManager" />
  </property>
  <property name="target">
   <ref local="showDao" />
  </property>
  <property name="transactionAttributes">
   <props>
     <prop key="save*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
                <prop key="add*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
                <prop key="modify*">PROPAGATION_REQUIRED,-OrderException,-OrderMinimumAmountException</prop>
   </props>
  </property>
 </bean>
</beans>然后是Action:
private ShowBo showBo = null; public ShowBo getShowBo() {
return showBo;
} public void setShowBo(ShowBo showBo) {
this.showBo = showBo;
} public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) { ShowActionForm actionForm = (ShowActionForm) form;
try {
showBo.setDatasToForm(actionForm);
return mapping.findForward("success");
} catch (Exception e) {
System.out.println(e.toString());
return mapping.findForward("default");
} }

Answer 4

不好意思上面发重复了
bo中
private ShowDao showDao = null; public ShowDao getShowDao() {
return showDao;
} public void setShowDao(ShowDao showDao) {
this.showDao = showDao;
}

public ShowBo(){

}
@SuppressWarnings("unchecked")

public void setDatasToForm(ShowActionForm actionForm){
String strHql = "FROM com.leonguo.entity.Emp";
List lstResult = showDao.getDatas(strHql);

System.out.println("strHql 执行完成！Bo");

List<ResultData> lstDatas = new ArrayList<ResultData>();
for (int i = 0; i < lstResult.size(); i++) {
Emp empData = new Emp();
empData = (Emp) lstResult.get(i);
Department departData = new Department();
departData = empData.getDepartment(); ResultData resultData = new ResultData();
resultData.setEmpId(empData.getEmpId());
resultData.setEmpName(empData.getEmpName());
resultData.setDepartmentName(departData.getDepartmentName()); lstDatas.add(resultData);
} actionForm.setLstDatas(lstDatas);
}

Answer 5

daoImpl中：
private static final Logger logger = Logger.getLogger(ShowDaoImpl.class); @SuppressWarnings("unused") 
private SessionFactory sessionFactory = null; public void setSessionFactory(SessionFactory sessionFactory) {
if (logger.isDebugEnabled()) {
logger.debug("setSessionFactory(SessionFactory) - start");
} this.sessionFactory = sessionFactory; if (logger.isDebugEnabled()) {
logger.debug("setSessionFactory(SessionFactory) - end");
}
} @SuppressWarnings("unchecked")
public List getDatas(String strHql) {

if (logger.isDebugEnabled()) {
logger.debug("getDatas(String) - start");
} System.out.println( "strHql ====== " + strHql );
List lstResult = new ArrayList();
try{
lstResult = this.getHibernateTemplate().find(strHql);
System.out.println("HQL语句执行完毕 DaoImpl"); if (logger.isDebugEnabled()) {
logger.debug("getDatas(String) - end");
} 

//lstResult = sessionFactory.getCurrentSession().createQuery(strHql).list();

return lstResult;

}
catch(Exception e){
logger.error("getDatas(String)", e); System.out.println(e.toString()); if (logger.isDebugEnabled()) {
logger.debug("getDatas(String) - end");
}
return null;
}

Answer 6

最后是log4j的错误信息：INFO - JDBC driver: SQLServer, version: 2.2.0040
INFO - Using dialect: org.hibernate.dialect.SQLServerDialect
INFO - Using default transaction strategy (direct JDBC transactions)
INFO - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
INFO - Automatic flush during beforeCompletion(): disabled
INFO - Automatic session close at end of transaction: disabled
INFO - Scrollable result sets: enabled
INFO - JDBC3 getGeneratedKeys(): disabled
INFO - Connection release mode: on_close
INFO - Default batch fetch size: 1
INFO - Generate SQL with comments: disabled
INFO - Order SQL updates by primary key: disabled
INFO - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
INFO - Using ASTQueryTranslatorFactory
INFO - Query language substitutions: {}
INFO - Second-level cache: enabled
INFO - Query cache: disabled
INFO - Cache provider: org.hibernate.cache.EhCacheProvider
INFO - Optimize cache for minimal puts: disabled
INFO - Structured second-level cache entries: disabled
INFO - Echoing all SQL to stdout
INFO - Statistics: disabled
INFO - Deleted entity synthetic identifier rollback: disabled
INFO - Default entity-mode: pojo
INFO - building session factory
WARN - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/D:/apache-tomcat-5.5.23/webapps/sample_3/WEB-INF/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
ERROR - CGLIB Enhancement failed: com.leonguo.entity.Department
java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)V
at net.sf.cglib.core.ClassEmitter.begin_class(ClassEmitter.java:77)
at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:173)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)。
WARN - could not create proxy factory for:com.leonguo.entity.Department
org.hibernate.HibernateException: CGLIB Enhancement failed: com.leonguo.entity.Department
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:132)
at org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
at org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
at org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)。
Caused by: java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)V
at net.sf.cglib.core.ClassEmitter.begin_class(ClassEmitter.java:77)
at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:173)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:116)
... 89 more
ERROR - CGLIB Enhancement failed: com.leonguo.entity.Emp
java.lang.NoClassDefFoundError
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:116)
at org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
at org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
at org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)
at org.hibernate.tuple.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:64)
at org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:257)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:412)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:108)
at org.hibernate.persister.PersisterFactory.createClassPers

WARN - could not create proxy factory for:com.leonguo.entity.Mession
org.hibernate.HibernateException: CGLIB Enhancement failed: com.leonguo.entity.Mession
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:132)
at org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
at org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
at org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)
at org.hibernate.tuple.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:64)
at org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:257)。
Caused by: java.lang.NoClassDefFoundError
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:116)
... 89 more
INFO - Not binding factory to JNDI, no JNDI name configured
INFO - Using DataSource [org.apache.commons.dbcp.BasicDataSource@1d46259] of Hibernate SessionFactory for HibernateTransactionManager
INFO - Root WebApplicationContext: initialization completed in 9875 ms
INFO - Initializing composable request processor for module prefix ''
INFO - Initialize action of type: org.springframework.web.struts.DelegatingActionProxy
ERROR - getDatas(String)
java.lang.NullPointerException
at org.hibernate.tuple.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:372)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3121)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:232)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:173)
差不多是这样的

Answer 7

挖,你的错误是在太多了,建议一下你还是找本书，把上面的源码搞下来,慢慢研究,这样才能更好的理解!不过你上面的问题，从异常来看!
1 没有+驱动包
2 你的数据库方言(dialect)也没有配置
3 你的SessionFactory可能根本没有创建,或者你在创建SessionFactory中没有将起获取!愿君好运...

Answer 8

嗯，问题已经解决了，是在Spring中必须要把用到的表的关联表实体全都反转出来。在Web.xml中添加Hiernate的
延迟加载，就可以解了

Answer 9

你好  我想问下怎么在Spring中sessionFactory 里配置 表的关联表的反转呢