Spring Hibernate - 无法获取当前线程的事务同步会话 [英] Spring Hibernate - Could not obtain transaction-synchronized Session for current thread

问题描述

我用spring + hibernate创建了一个应用程序，但是我总是得到这个错误。这是我第一次使用hibernate的应用程序，我阅读了一些指南，但是我无法解决这个问题。

这是我的应用程序的代码

  ott 05，2014 4:03:06 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh 
信息：刷新org.springframework.context.support.ClassPathXmlApplicationContext@1eab16b：启动日期[Sun Oct 05 16:03 ：06 CEST 2014];上下文层次结构的根
 ott 05，2014 4:03:06 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 
 Informazioni：从类路径资源加载XML bean定义[springConfig.xml] 
 ott 05，2014 4:03:08 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager< clinit> 
 INFO：HCANN000001：Hibernate Commons Annotations {4.0.5.Final} 
 ott 05，2014 4:03:08 PM org.hibernate.Version logVersion 
 INFO：HHH000412：Hibernate Core {4.3 .6.Final} 
 ott 05，2014 4:03:08 PM org.hibernate.cfg.Environment< clinit> 
 INFO：HHH000206：找不到hibernate.properties 
 ott 05，2014 4:03:08 PM org.hibernate.cfg.Environment buildBytecodeProvider 
 INFO：HHH000021：字节码提供程序名称：javassist 
 ott 05，2014 4:03:09 PM org.hibernate.dialect.Dialect< init> 
 INFO：HHH000400：使用方言：org.hibernate.dialect.MySQL5Dialect 
 ott 05，2014 4:03:09 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService 
 INFO： HHH000399：使用默认事务策略（直接JDBC事务）
 ott 05，2014 4:03:09 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory< init> 
 INFO：HHH000397：在线程main中使用ASTQueryTranslatorFactory 
异常org.hibernate.HibernateException：无法获取当前线程的事务同步会话
在org.springframework.orm.hibernate4.SpringSessionContext .currentSession（SpringSessionContext.java:134）
 at org.hibernate.internal.SessionFactoryImpl.getCurrentSession（SessionFactoryImpl.java:1014）
 at coreservlets.StudentDAOImpl.create（StudentDAOImpl.java:19）
在coreservlets.MainApp.main（MainApp.java:14）
  

student.java

  package coreservlets; 
 
 public class Student {
 
 private Integer id; 
私人字符串名称; 
私人整数年龄; 
 
 public Integer getId（）{return id;} // getId 
 
 public void setId（Integer id）{this.id = id;} // setId 
 
 public String getName（）{return name;} // getName 
 $ b $ public void setName（String name）{this.name = name;} // setName 
 
 public Integer getAge（）{return age;} // getAge 
 $ b $ public void setAge（Integer age）{this.age = age;} // setAge 
 
} // Student 
  

studentDAO.java

  package coreservlets; 
 
 import org.hibernate.SessionFactory; 
 
 public interface StudentDAO {
 
 public void setSessionFactory（SessionFactory sessionFactory）; 
 
 public void create（String name，Integer age）; 
 $ b $ // StudentDAO 
  

StudentDAOImpl.java

  package coreservlets; 
 
 import org.hibernate.Session; 
 import org.hibernate.SessionFactory; 
 import org.springframework.beans.factory.annotation.Autowired; 
 import org.springframework.stereotype.Repository; 
 
 @Repository 
 public class StudentDAOImpl实现StudentDAO {
 
 private SessionFactory sessionFactory; 
 
 @Autowired 
 public void setSessionFactory（SessionFactory sessionFactory）{
 this.sessionFactory = sessionFactory; 
} // setSessionFactory 
 
 public void create（String name，Integer age）{
 Session session = sessionFactory.getCurrentSession（）; 
学生=新生（）; 
 student.setName（name）; 
 student.setAge（age）; 
 session.save（student）; 
} //创建
 
} // StudentDAOImpl 
  

MainApp .java

  package coreservlets; 
 
 import org.springframework.context.ApplicationContext; 
 import org.springframework.context.support.ClassPathXmlApplicationContext; 
 
 public class MainApp {
 
 public static void main（String [] args）{
 
 ApplicationContext context = new ClassPathXmlApplicationContext（springConfig.xml ）; 
 
 StudentDAOImpl student =（StudentDAOImpl）context.getBean（studentDAOImpl）; 
 
 student.create（Alessandro，新Integer（33））; 
 
 $ b} //主要
 
} // MainApp 
  

springConfig.xml

 <？xml version =1.0encoding =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：mvc =http://www.springframework.org/schema/mvc
 xsi ：schemaLocation =http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd 
 http：//www.springframework。 org / schema / context http://www.springframework.org/schema/context/spring-context-4.1.xsd 
 http://www.springframework.org/schema/mvc http：//www.springframework .ORG /模式/ MVC /弹簧-MVC-4.1.xsd> 
 
< context：annotation-config /> 
 
< context：component-scan base-package =coreservlets/> 
 
< bean id =dataSourceclass =org.apache.commons.dbcp2.BasicDataSource> 
< property name =driverClassNamevalue =com.mysql.jdbc.Driver/> 
< property name =urlvalue =jdbc：mysql：// localhost：3306 / spring_hibernate/> 
< property name =usernamevalue =root/> 
< property name =passwordvalue =password/> 
< property name =initialSizevalue =5/> 
< property name =maxTotalvalue =10/> 
< / bean> 
 
< bean id =sessionFactoryclass =org.springframework.orm.hibernate4.LocalSessionFactoryBean> 
< property name =dataSourceref =dataSource/> 
< property name =hibernateProperties> 
<值> 
 hibernate.dialect = org.hibernate.dialect.MySQLDialect 
< / value> 
< / property> 
 
< / bean> 
 
< / beans> 
  

  create table student 
（
 id整数不为空auto_increment，
 name varchar（20）非空，
年龄整数非空，
主键id）
）; 
  

解决方案

您必须启用事务支持（< tx：注解驱动> 或 @EnableTransactionManagement ）和声明 transactionManager ，它应该通过 SessionFactory 。

您必须将 @Transactional 添加到 @Repository

在 @Repository 中使用 @Transactional Spring可以将事务支持应用到您的存储库中。

您的 Student 类没有@ javax.persistence。*注释 @Entity ，我假设该类的映射配置已通过XML定义。

I created an application with spring + hibernate, but I always get this error. This is my first application with hibernate, I read some guides but I can not solve this problem. Where am I doing wrong?

This is the code of my application

ott 05, 2014 4:03:06 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
Informazioni: Refreshing   org.springframework.context.support.ClassPathXmlApplicationContext@1eab16b: startup date  [Sun Oct 05 16:03:06 CEST 2014]; root of context hierarchy
ott 05, 2014 4:03:06 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
Informazioni: Loading XML bean definitions from class path resource [springConfig.xml]
ott 05, 2014 4:03:08 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
ott 05, 2014 4:03:08 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.3.6.Final}
ott 05, 2014 4:03:08 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
ott 05, 2014 4:03:08 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
ott 05, 2014 4:03:09 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
ott 05, 2014 4:03:09 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
ott 05, 2014 4:03:09 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
Exception in thread "main" org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread
at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:134)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1014)
at coreservlets.StudentDAOImpl.create(StudentDAOImpl.java:19)
at coreservlets.MainApp.main(MainApp.java:14)

student.java

package coreservlets;

public class Student {

    private Integer id;
    private String name;
    private Integer age;

    public Integer getId(){return id;}//getId

    public void setId(Integer id){this.id=id;}//setId

    public String getName(){return name;}//getName

    public void setName(String name){this.name=name;}//setName

    public Integer getAge(){return age;}//getAge

    public void setAge(Integer age){this.age=age;}//setAge

}//Student

studentDAO.java

package coreservlets;

import org.hibernate.SessionFactory;

public interface StudentDAO {

    public void setSessionFactory(SessionFactory sessionFactory);

    public void create(String name,Integer age);

}//StudentDAO

StudentDAOImpl.java

package coreservlets;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

@Repository
public class StudentDAOImpl implements StudentDAO {

    private SessionFactory sessionFactory;

    @Autowired
    public void setSessionFactory(SessionFactory sessionFactory){
        this.sessionFactory=sessionFactory;
    }//setSessionFactory

    public void create(String name,Integer age){
        Session session=sessionFactory.getCurrentSession();
        Student student=new Student();
        student.setName(name);
        student.setAge(age);
        session.save(student);
    }//create

}//StudentDAOImpl

MainApp.java

package coreservlets;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainApp {

    public static void main(String[] args) {

        ApplicationContext context=new ClassPathXmlApplicationContext("springConfig.xml");

        StudentDAOImpl student=(StudentDAOImpl) context.getBean("studentDAOImpl");

        student.create("Alessandro", new Integer(33));


    }//main

}//MainApp

springConfig.xml

<?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:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

<context:annotation-config/>

<context:component-scan base-package="coreservlets"/>

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
  <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
  <property name="url" value="jdbc:mysql://localhost:3306/spring_hibernate"/>
  <property name="username" value="root"/>
  <property name="password" value="password"/>
  <property name="initialSize" value="5"/>
  <property name="maxTotal" value="10"/>
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="hibernateProperties">
    <value>
            hibernate.dialect=org.hibernate.dialect.MySQLDialect
    </value>
</property>

</bean>

</beans>

sql

create table student
(
id integer not null auto_increment,
name varchar(20) not null,
age integer not null,
primary key(id)
);

解决方案

You must enable the transaction support (<tx:annotation-driven> or @EnableTransactionManagement) and declare the transactionManager and it should work through the SessionFactory.

You must add @Transactional into your @Repository

With @Transactional in your @Repository Spring is able to apply transactional support into your repository.

Your Student class has no the @javax.persistence.* annotations how @Entity, I am assuming the Mapping Configuration for that class has been defined through XML.

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