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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="http://www.mamicode.com/com.mysql.jdbc.Driver"/> <property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8"/> <property name="username" value="http://www.mamicode.com/root"/> <property name="password" value="http://www.mamicode.com/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="http://www.mamicode.com/utf-8" /> <property name="maxUploadSize" value="http://www.mamicode.com/10485760000" /> <property name="maxInMemorySize" value="http://www.mamicode.com/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="http://www.mamicode.com/"></property> <property name="suffix" value="http://www.mamicode.com/.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;@Repositorypublic 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》
springMVC之事务配置（问题来源：为什么数据保存不了）
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