Java 无法保存休眠4数据
我做了很多研究,但我没有得到解决方案,我的错误是Java 无法保存休眠4数据,java,spring,hibernate,Java,Spring,Hibernate,我做了很多研究,但我没有得到解决方案,我的错误是 org.hibernate.HibernateException: No Session found for current thread at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97) at org.hibernate.internal.SessionFactoryImp
org.hibernate.HibernateException: No Session found for current thread
at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:978)
at dao.GenericDaoImpl.save(GenericDaoImpl.java:42)
at dao.UserDao.save(UserDao.java:18)
at controllers.UserController.userRegistrationSubmit(UserController.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
我的SpringConfig文件是
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="controllers,dao" />
<tx:annotation-driven transaction-manager="transactionManager"/>
<!--
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" />
</tx:attributes>
</tx:advice> -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean
id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="configLocation">
<value>
classpath:hibernate.cfg.xml
</value>
</property>
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
<prop key="hibernate.show_sql">true</prop>
<!-- <prop key="hibernate.c3p0.min_size">5</prop>
<prop key="hibernate.c3p0.max_size">20</prop>
<prop key="hibernate.c3p0.timeout">300</prop>
<prop key="hibernate.c3p0.max_statements">50</prop>
<prop key="hibernate.c3p0.idle_test_period">3000</prop> -->
</props>
</property>
</bean>
<bean name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/foodcartdb" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
</beans>
/WEB-INF/pages/
.jsp
类路径:hibernate.cfg.xml
org.hibernate.dialogue.mysqldialogue
org.springframework.orm.hibernate4.SpringSessionContext
真的
这是我保存数据的代码
package dao;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Configuration;
//import org.springframework.orm.hibernate4.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
public class GenericDaoImpl<T> implements GenericDao<T> {
/*public GenericDaoImpl(){
//Do Also Nothing here ha ha ha
}
//@Autowired
public GenericDaoImpl(SessionFactory sessionFactory){
super.setSessionFactory(sessionFactory);
}*/
/*@Autowired
protected void init(SessionFactory sessionFactory) {
super.setSessionFactory(sessionFactory);
}*/
@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;
public Session getSession() {
return sessionFactory.getCurrentSession();
}
@Override
public void save(T t) {
// TODO Auto-generated method stub
//getHibernateTemplate().save(t);
this.sessionFactory.getCurrentSession().save(t);
}
@Override
public void update(T t) {
// TODO Auto-generated method stub
//getHibernateTemplate().update(t);
getSession().update(t);
}
@Override
public void delete(T t) {
// TODO Auto-generated method stub
//getHibernateTemplate().delete(t);
getSession().delete(t);
}
}
包dao;
导入org.hibernate.Session;
导入org.hibernate.SessionFactory;
导入org.springframework.beans.factory.annotation.Autowired;
导入org.springframework.beans.factory.annotation.Qualifier;
导入org.springframework.context.annotation.Configuration;
//导入org.springframework.orm.hibernate4.support.HibernateDaoSupport;
导入org.springframework.stereotype.Repository;
导入org.springframework.stereotype.Service;
导入org.springframework.transaction.annotation.EnableTransactionManagement;
@配置
@启用事务管理
公共类GenericDaoImpl实现GenericDao{
/*公共通用DAOImpl(){
//在这里也什么都不做哈哈哈
}
//@自动连线
公共通用DAOImpl(SessionFactory SessionFactory){
超级会话工厂(会话工厂);
}*/
/*@自动连线
受保护的void init(SessionFactory SessionFactory){
超级会话工厂(会话工厂);
}*/
@自动连线
@限定符(“会话工厂”)
私人会话工厂会话工厂;
公共会话getSession(){
返回sessionFactory.getCurrentSession();
}
@凌驾
公共无效保存(T){
//TODO自动生成的方法存根
//getHibernateTemplate().save(t);
this.sessionFactory.getCurrentSession().save(t);
}
@凌驾
公共无效更新(T){
//TODO自动生成的方法存根
//getHibernateTemplate().update(t);
getSession().update(t);
}
@凌驾
公共作废删除(T){
//TODO自动生成的方法存根
//getHibernateTemplate().delete(t);
getSession().delete(t);
}
}
请有人帮我找出哪里出了问题,我花了将近半天的时间来解决这个问题。我认为您应该在DAO类上使用
@Transactional
,在单个配置类上使用@Configuration
/@EnableTransactionManagement
,不在每个DAO上。尝试使用@Repository
注释,而不是@Configuration
和@EnableTransactionManagement
@Repository
public class GenericDaoImpl<T> implements GenericDao<T> {
// code goes here
}
@存储库
公共类GenericDaoImpl实现GenericDao{
//代码在这里
}
@Repository
在Spring2.0及更高版本中,@Repository注释是
完成角色或原型(也称为数据)的任何类
访问存储库的对象(或DAO)。在这个标记的用途中
是异常的自动翻译
首先,在
GenericDaoImpl
类上组合的@Configuration
和@EnableTransactionManagement
注释是多余的,因为您已经在Spring XML配置文件中启用了注释驱动的事务管理
其次,GenericDaoImpl
应注释为@Repository
第三,你没有发布你的UserDao
类。它是否继承了GenericDaoImpl
?如果是这样,考虑制作<代码> GynDaDoIMPL/<代码>抽象类(然后只有<代码> @存储库< /代码>应该是<代码> UserDao < /COD>单独)。
第四,为了获得会话,您必须将该方法注释为@Transactional
,或者使用。使用@Transactional
可以让Spring处理处理打开/关闭会话的样板代码,但强制您在方法的整个范围内呈现单个事务。为自己打开一个会话可以更好地控制会话管理,但相当繁琐
第五,如果UserDao
继承了GenericDaoImpl
,那么在save
方法上使用@Transactional
是无用的,因为(默认情况下)这样的注释只适用于通过bean接口执行的方法调用。因为在这里使用继承是一种不好的做法,所以您应该删除它并调用session.save(t)
insideUserDao
本身
最后也是最不重要的一点,作为旁注,最好使用注释进行依赖项注入,例如和(分别替换@Autowire
和@Qualifier
)