springMVC之事务配置（问题来源：为什么数据保存不了）

参考文章：http://www.cnblogs.com/leiOOlei/p/3725911.html

自己的亲身体会，来源问题this.sessionFactory.getCurrentSession().save(obj);保存不了数据。原因在springMVC配置事务时，事务注解应该在类扫描注解之后，然后在到相对应dao层的方法要加@Transaction

全注解配置如下：

第一步，首先看一下web.xml，如下：

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

    xmlns="http://java.sun.com/xml/ns/javaee" 

    xmlns:web="http://java.sun.com/xml/ns/javaee" 

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 

        http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 

        id="WebApp_ID" version="3.0">

  <display-name>Archetype Created Web Application</display-name>

  <context-param>

    <param-name>contextConfigLocation</param-name>

    <param-value>classpath:/spring-*.xml</param-value>

  </context-param>

  <listener>

    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

  </listener>

  <servlet>

    <servlet-name>lei-dispatcher</servlet-name>

    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>

      <param-name>contextConfigLocation</param-name>

      <param-value>classpath:/lei-dispatcher-servlet.xml</param-value>

    </init-param>

    <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

    <servlet-name>lei-dispatcher</servlet-name>

    <url-pattern>/</url-pattern>

  </servlet-mapping>

</web-app>

　　

第二步，spring-hibernate配置，见以下spring-hibernate.xml配置

<?xml version="1.0" encoding="UTF-8"?>  

<beans xmlns="http://www.springframework.org/schema/beans"  

    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"  

    xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"  

    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  

    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/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd  

            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd  

            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 

<!-- 配置数据源 -->	

<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/test?characterEncoding=UTF-8"/>

		<property name="username" value="root"/>

		<property name="password" value="root"/>

	</bean>

	

<!-- 配置sessionFactory-->

	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

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

		<property name="hibernateProperties">

			<props>

				<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>

				<prop key="hibernate.hbm2ddl.auto">update</prop> 

                <prop key="hibernate.show_sql">true</prop>

                <prop key="hiberante.format_sql">true</prop>

                <prop key="current_session_context_class">thread</prop>

			</props>

		</property>

		<property name="configLocations">

			<list>

				<value>

					classpath*:hibernate.cfg.test.xml

				</value>

			</list>

		</property>

	</bean>

	

	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">

		<property name="sessionFactory" ref="sessionFactory"></property>

	</bean>

	



</beans>

　　第三步:springMVC配置
　

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"  

 xmlns:context="http://www.springframework.org/schema/context"  

 xmlns:p="http://www.springframework.org/schema/p"  

 xmlns:mvc="http://www.springframework.org/schema/mvc"  

 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/context  

      http://www.springframework.org/schema/context/spring-context.xsd  

      http://www.springframework.org/schema/mvc  

      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

       http://www.springframework.org/schema/tx

        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd

      ">



	<!-- 注解扫描包 -->

	<context:component-scan base-package="com.example.*"/>

	

	

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

	

	<!-- 引入注解类      

		下面两个都可以注释

	 -->

	<mvc:annotation-driven/>

<!-- 	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> -->

	

<!-- 	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> -->

	

	<!-- 文件上传配置 -->

	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

		  <property name="defaultEncoding" value="utf-8" />

	      <property name="maxUploadSize" value="10485760000" />

	      <property name="maxInMemorySize" value="40960" />

	</bean>

	



	<!-- 静态资源访问配置 -->

	<mvc:resources location="/img/" mapping="/img/**"/>

	<mvc:resources location="/topui/" mapping="/topui/**"/>

	<!-- 视图解析器 -->

	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

		<property name="prefix" value="/"></property>

		<property name="suffix" value=".jsp"></property>

	</bean>

 </beans>  

　　到这配置完毕，相对应的dao层如下：

package com.example.dao.impl;



import java.util.List;



import javax.annotation.Resource;



import org.hibernate.SessionFactory;

import org.springframework.stereotype.Repository;

import org.springframework.transaction.annotation.Transactional;



import com.example.dao.IFilesDAO;

import com.example.entity.Files;



@Repository

public class FilesDAO implements IFilesDAO{



	@Resource

	private SessionFactory sessionFactory;



	@SuppressWarnings("unchecked")

	@Override

	public List<Files> findFilesList(String id) {

		// TODO Auto-generated method stub

		return this.sessionFactory.getCurrentSession().createQuery("from Files where id='" + id+"'").list();

	}



	@Transactional

	@Override

	public void deleteFile(Files file) {

		this.sessionFactory.getCurrentSession().delete(file);

	}



	@Transactional

	@Override

	public void updateFile(Files file) {

		// TODO Auto-generated method stub

		this.sessionFactory.getCurrentSession().update(file);

	}



	@Transactional

	@Override

	public void saveFiles(Files file) {

		// TODO Auto-generated method stub

		System.out.println(file.getId());

		this.sessionFactory.getCurrentSession().save(file);

		System.out.println(file.getId());

	}

	

}

　　具体展示如下,其实spring事务配置还有其他配置方式。如需看可以访问《Spring事务配置的5种方法》