我有一个使用Spring和Hibernate的Java Struts2 Web应用程序。
我遇到了org.hibernate.HibernateException: No Session found for current thread的问题。
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();
}
}
我收到的异常信息
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)
<tx:annotation-driven/>，并在你的服务上使用 @Transactional 进行注释。另外，如果你在 XML 中定义了所有的 bean 和属性，为什么还要使用 @Autowired 注释呢？如果你从未使用它们，为什么要为你的服务和 DAO 定义一个接口呢？ - JB Nizet