Spring-Hibernate-当前会话未找到会话

Question

我有一个使用spring和hibernate的java stuts2 Web应用程序。

我越来越org.hibernate.HibernateException: No Session found for current thread。

SpringBean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-3.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

    <context:component-scan base-package="org.rohith" />
    <context:annotation-config />
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/company" />
        <property name="username" value="root" />
        <property name="password" value="password" />
    </bean>
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

        <property name="dataSource">
            <ref bean="dataSource" />
        </property>

        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>

        <property name="mappingResources">
            <list>
                <value>hibernate.cfg.xml</value>
            </list>
        </property>

    </bean>
    <!-- <tx:annotation-driven/> -->
    <bean id = "transactionManager" class = "org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name = "sessionFactory" ref = "sessionFactory" />
    </bean>

    <bean id="customerDaoImpl" class="org.rohith.dao.impl.CustomerDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>

    <bean id="customerServiceImpl" class="org.rohith.service.impl.CustomerServiceImpl">
        <property name="customerDaoImpl" ref="customerDaoImpl"/>
    </bean>

</beans>

hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?>
   <!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>  
        <!-- Names the annotated entity class -->
        <mapping class="org.rohith.model.Customer"/>    
    </session-factory>  
</hibernate-configuration>

CustomerServiceImpl.java

package org.rohith.service.impl;

import org.rohith.dao.impl.CustomerDaoImpl;
import org.rohith.model.Customer;
import org.rohith.service.CustomerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CustomerServiceImpl implements CustomerService {

    @Autowired
    private CustomerDaoImpl customerDaoImpl;

    @Override
    public void saveCustomer(Customer customer) {
        customerDaoImpl.saveCustomer(customer);
    }
    public CustomerDaoImpl getCustomerDaoImpl() {
        return customerDaoImpl;
    }
    public void setCustomerDaoImpl(CustomerDaoImpl customerDaoImpl) {
        this.customerDaoImpl = customerDaoImpl;
    }

}

CustomerDaoImpl.java

package org.rohith.dao.impl;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.rohith.dao.CustomerDao;
import org.rohith.model.Customer;


public class CustomerDaoImpl   implements CustomerDao {

    private SessionFactory sessionFactory;

    @Override
    public void saveCustomer(Customer customer) {
        Session session = getSession();
        session.clear();
        try {
                session.saveOrUpdate(customer);
                session.flush();
        } catch (Throwable e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }
    public SessionFactory getSessionFactory() {
        return this.sessionFactory;
    }

    public Session getSession() throws HibernateException {
        Session sess = getSessionFactory().getCurrentSession();
        if (sess == null) {
            sess = getSessionFactory().openSession();
        }
//      Session sess = getSessionFactory().openSession();
        return sess;
    }

}

CustomerAction.java

public class CustomerAction extends ActionSupport{
    private String name;
    private String addr1;
    private String addr2;
    private String city;
    private String state;

    private CustomerServiceImpl customerServiceImpl;

//Getters and setters

    public String execute(){
        Customer cust= new Customer();
        cust.setName(name);
        cust.setAddress1(addr1);
        cust.setAddress2(addr2);
        cust.setCity(city);
        cust.setState(state);
        System.out.println(name);
        WebApplicationContext webApplicationContext = WebApplicationContextUtils
                .getRequiredWebApplicationContext(getRequest().getSession()
                        .getServletContext());
        customerServiceImpl = (CustomerServiceImpl) webApplicationContext.getBean("customerServiceImpl");
        customerServiceImpl.saveCustomer(cust);
        //saveCust(cust);
        return "success";
    }
protected HttpServletRequest getRequest() {
        return ServletActionContext.getRequest();
    }
protected HttpServletResponse getResponse() {
        return ServletActionContext.getResponse();
    }
}

我得到的例外

org.hibernate.HibernateException: No Session found for current thread
    org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)
    org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:978)
    org.rohith.dao.impl.CustomerDaoImpl.getSession(CustomerDaoImpl.java:33)
    org.rohith.dao.impl.CustomerDaoImpl.saveCustomer(CustomerDaoImpl.java:16)
    org.rohith.service.impl.CustomerServiceImpl.saveCustomer(CustomerServiceImpl.java:18)
    org.rohith.CustomerAction.execute(CustomerAction.java:36)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)

Answer 1

您在Spring配置中指定了一个事务管理器，但是没有关于何时或何处应用事务的配置。

在您的 SpringBean.xml中， 您应该取消注释<tx:annotation-driven/>：

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

然后，您应该将CustomerServiceImpl.saveCustomer方法注释为@Transactional：

@Service
public class CustomerServiceImpl implements CustomerService {

    ...

    @Override
    @Transactional
    public void saveCustomer(Customer customer) {
        customerDaoImpl.saveCustomer(customer);
    }

    ...
}