Hibernate：createQuery在没有活动事务的情况下无效 [英] Hibernate: createQuery is not valid without active transaction

问题描述

我的Spring + Hibernate项目存在一些问题。当我尝试获取数据时，我有：

HTTP状态500 - 请求处理失败;嵌套异常是org.hibernate.HibernateException：如果没有活动事务，createQuery是无效的
这里是我的xml配置代码：

 < beans xmlns =http://www.springframework.org/schema/beans
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instancexmlns：tx = http://www.springframework.org/schema/tx
 xsi：schemaLocation =http://www.springframework.org/schema/beans 
 http://www.springframework.org /schema/beans/spring-beans-3.0.xsd 
 http://www.springframework.org/schema/tx 
 http://www.springframework.org/schema/tx/spring-tx的.xsd> 
 
< bean id =dataSourceclass =org.apache.commons.dbcp.BasicDataSource
 destroy-method =close> 
< property name =driverClassNamevalue =com.mysql.jdbc.Driver/> 
< property name =urlvalue =jdbc：mysql：// localhost：3306 / users/> 
< property name =usernamevalue =root/> 
< property name =passwordvalue =12345/> 
< / bean> 
 
< bean id =SessionFactory
 class =org.springframework.orm.hibernate4.LocalSessionFactoryBean> 
< property name =dataSourceref =dataSource/> 
< property name =annotatedClasses> 
< list> 
<值> com.springapp.model.User< /值> 
<值> com.springapp.model.UserRole< /值> 
< value> com.springapp.model.Project< /值> 
< / list> 
< / property> 
< property name =hibernateProperties> 
<道具> 
< prop key =hibernate.dialect> org.hibernate.dialect.MySQLDialect< / prop> 
< prop key =hibernate.show_sql> false< / prop> 
< prop key =hibernate.current_session_context_class> thread< / prop> 
< /道具> 
< / property> 
< / bean> 
 
< tx：注解驱动的事务管理器=transactionManager/> 
 
< bean id =transactionManagerclass =org.springframework.orm.hibernate4.HibernateTransactionManager> 
< property name =sessionFactoryref =SessionFactory/> 
< / bean> 
  

来自DAO的方法

  @Override 
 public List< User> showAllUsers（）{
 List< User> users = new ArrayList< User>（）; 
 Session session = this.sessionFactory.getCurrentSession（）; 
 users = session.createQuery（from User）。list（）; 
返回用户; 
 
  

标记为交易的所有服务。当我删除
< prop key =hibernate.current_session_context_class>线程< / prop>
时有Hibernate错误：当前线程。如何解决此问题？

更新＃2
完整版

  @Autowired 
 private SessionFactory sessionFactory; 
 
 @SuppressWarnings（unchecked）
 public User findByUserName（String username）{
 
 List< User> users = new ArrayList< User>（）; 
 
会话会话= this.sessionFactory.getCurrentSession（）; 
 session.beginTransaction（）; 
 users = session 
 .createQuery（from User where username =？）
 .setParameter（0，username）.list（）; 
 session.getTransaction（）。commit（）; 
 session.close（）; 
 if（users.size（）> 0）{
 return users.get（0）; 
} else {
 return null; 
 
 
 
 @Override 
 public void addUser（User user）{
 Session session = this.sessionFactory.getCurrentSession（）; 
 session.save（user）; 
} 
 
 @Override 
 public void deleteUser（User user）{
 Session session = this.sessionFactory.getCurrentSession（）; 
 System.out.println（user.getUsername（））; 
 session.delete（user）; 
} 
 @Override 
 public void verifyUser（User user）{
 Session session = this.sessionFactory.getCurrentSession（）; 
 session.update（user）; 
} 
 @Override 
 public List< User> showAllUsers（）{
 List< User> users = new ArrayList< User>（）; 
 Session session = this.sessionFactory.getCurrentSession（）; 
 session.beginTransaction（）; 
 users = session.createQuery（from User）。list（）; 
 session.getTransaction（）。commit（）; 
 session.close（）; 
返回用户; 
 
 
 
 
 
 $现在我有了嵌套异常是org.hibernate.SessionException：Session已经关闭
发生了什么事情？
 
 
 
 更新 
这就是我如何调用这个方法：
  @RequestMapping（/ admin / updateUser）
 public String updateUser（ModelMap model，@ ModelAttribute（userId）String username） 
 {
 User user = this.userService.findByUserName（username）; 
 if（user.isEnabled（））user.setEnabled（false）; 
 else user.setEnabled（true）; 
 this.userService.updateUser（user）; 
返回重定向：/ admin; 
} 
 @RequestMapping（/ admin）
 public String adminPanel（ModelMap模型）
 {
 List< User> users = this.userService.showAllUsers（）; 
 model.addAttribute（users，users）; 
返回adminpanel; 
} 
  
 
 
解决方案
添加
  session.beginTransaction（）; 
  
创建查询之前。 
 So： 
 
 
 列表< User> users = new ArrayList< User>（）; 
 Session session = this.sessionFactory.getCurrentSession（）; 
 session.beginTransaction（）; 
 users = session.createQuery（from User）。list（）; 
返回用户; 
  
 除了编辑 
 
 
 
这意味着您尝试启动一个事务，而您没有提交或回滚另一个事务。你必须通过使用 
 
 
  session.getTransaction（）。commit（）来提交会话（最好是关闭会话）。 
 session.close（）; 
  
在您的createQuery之后。 
将它添加到你的showAllUsers（）和findByUserName（）中。
 
 
祝你好运！
 
I have some problems with my Spring + Hibernate project. When i try to fetch data, i have:

HTTP Status 500 - Request processing failed; nested exception is org.hibernate.HibernateException: createQuery is not valid without active transaction
Here my code for xml config:
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
            destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/users" />
    <property name="username" value="root"/>
    <property name="password" value="12345"/>
</bean>

<bean id="SessionFactory"
               class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="annotatedClasses">
        <list>
            <value>com.springapp.model.User</value>
            <value>com.springapp.model.UserRole</value>
            <value>com.springapp.model.Project</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.current_session_context_class">thread</prop>
        </props>
    </property>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="SessionFactory"/>
</bean>


Method from DAO
@Override
public List<User> showAllUsers(){
    List<User> users = new ArrayList<User>();
    Session session = this.sessionFactory.getCurrentSession();
    users = session.createQuery("from User").list();
    return users;
}
All services marked as Transactionals. When I delete 
<prop key="hibernate.current_session_context_class">thread</prop>
I have Hibernate error: No Session found for current thread. How can I solve this problem?

UPDATED #2
Full dao
@Autowired
private SessionFactory sessionFactory;

@SuppressWarnings("unchecked")
public User findByUserName(String username) {

    List<User> users = new ArrayList<User>();

    Session session = this.sessionFactory.getCurrentSession();
    session.beginTransaction();
    users = session
            .createQuery("from User where username=?")
            .setParameter(0, username).list();
    session.getTransaction().commit();
    session.close();
    if (users.size() > 0) {
        return users.get(0);
    } else {
        return null;
    }
}

@Override
public void addUser(User user){
    Session session = this.sessionFactory.getCurrentSession();
    session.save(user);
}

@Override
public void deleteUser(User user){
    Session session = this.sessionFactory.getCurrentSession();
    System.out.println(user.getUsername());
    session.delete(user);
}
@Override
public void verifyUser(User user){
    Session session = this.sessionFactory.getCurrentSession();
    session.update(user);
}
@Override
public List<User> showAllUsers(){
    List<User> users = new ArrayList<User>();
    Session session = this.sessionFactory.getCurrentSession();
    session.beginTransaction();
    users = session.createQuery("from User").list();
    session.getTransaction().commit();
    session.close();
    return users;
}
Now I have "nested exception is org.hibernate.SessionException: Session was already closed"
What's the matter?

UPDATE
This is how I called this methods:
@RequestMapping("/admin/updateUser")
public String updateUser(ModelMap model,@ModelAttribute("userId") String username)
{
    User user = this.userService.findByUserName(username);
    if(user.isEnabled()) user.setEnabled(false);
    else user.setEnabled(true);
    this.userService.updateUser(user);
    return "redirect:/admin";
}
 @RequestMapping("/admin")
public String adminPanel(ModelMap model)
{
    List<User> users = this.userService.showAllUsers();
    model.addAttribute("users",users);
    return "adminpanel";
}

解决方案
Add
        session.beginTransaction();
Before creating your query.
So:
  List<User> users = new ArrayList<User>();
Session session = this.sessionFactory.getCurrentSession();
session.beginTransaction();
users = session.createQuery("from User").list();
return users;
Addition to your edit

This means you're trying to start a transaction, while you did not commit or rollback another transaction. You have to commit to your session (and preferably closing the session) by using
session.getTransaction().commit();
    session.close();
After your createQuery.
Add it to your showAllUsers() and findByUserName()

Good luck!

                        
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