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			Spring事務(wù)配置的五種方式
		
          
		Spring配置文件中關(guān)于事務(wù)配置總是由三個組成部分，分別是DataSource、TransactionManager和代理機制這三部分，無論哪種配置方式，一般變化的只是代理機制這部分。 

          DataSource、TransactionManager這兩部分只是會根據(jù)數(shù)據(jù)訪問方式有所變化，比如使用Hibernate進行數(shù)據(jù)訪問時，DataSource實際為SessionFactory，TransactionManager的實現(xiàn)為HibernateTransactionManager。

          具體如下圖：

          根據(jù)代理機制的不同，總結(jié)了五種Spring事務(wù)的配置方式，配置文件如下：

          第一種方式：每個Bean都有一個代理 

          <? 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:aop           ="http://www.springframework.org/schema/aop" 
              xsi:schemaLocation           ="http://www.springframework.org/schema/beans 
                     http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
                     http://www.springframework.org/schema/context
                     http://www.springframework.org/schema/context/spring-context-2.5.xsd
                     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"           > 

                        < bean id ="sessionFactory"   
                      class           ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >   
                            < property name ="configLocation" value ="classpath:hibernate.cfg.xml"   />   
                            < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration"   /> 
                        </ bean >   

                        <!-- 定義事務(wù)管理器（聲明式的事務(wù)） -->   
                        < bean id ="transactionManager" 
                  class           ="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
                            < property name ="sessionFactory" ref ="sessionFactory"   /> 
                        </ bean > 
              
                        <!-- 配置DAO --> 
                        < bean id ="userDaoTarget" class ="com.bluesky.spring.dao.UserDaoImpl" > 
                            < property name ="sessionFactory" ref ="sessionFactory"   /> 
                        </ bean > 
              
                        < bean id ="userDao"   
                  class           ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" >   
                               <!-- 配置事務(wù)管理器 -->   
                               < property name ="transactionManager" ref ="transactionManager"   />      
                            < property name ="target" ref ="userDaoTarget"   />   
                             < property name ="proxyInterfaces" value ="com.bluesky.spring.dao.GeneratorDao"   /> 
                            <!-- 配置事務(wù)屬性 -->   
                            < property name ="transactionAttributes" >   
                                < props >   
                                    < prop key ="*" > PROPAGATION_REQUIRED </ prop > 
                                </ props >   
                            </ property >   
                        </ bean >   
          </ beans > 


          第二種方式：所有Bean共享一個代理基類

          

          <? 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:aop           ="http://www.springframework.org/schema/aop" 
           xsi:schemaLocation           ="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"           > 

                     < bean id ="sessionFactory" 
           class           ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
                     < property name ="configLocation" value ="classpath:hibernate.cfg.xml" /> 
                     < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration" /> 
                     </ bean > 

                     <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> 
                     < bean id ="transactionManager" 
           class           ="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 
           
                     < bean id ="transactionBase" 
           class           ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" 
           lazy-init           ="true" abstract ="true" > 
                     <!-- 配置事務(wù)管理器 --> 
                     < property name ="transactionManager" ref ="transactionManager" /> 
                     <!-- 配置事務(wù)屬性 --> 
                     < property name ="transactionAttributes" > 
                     < props > 
                     < prop key ="*" > PROPAGATION_REQUIRED </ prop > 
                     </ props > 
                     </ property > 
                     </ bean > 
           
                     <!-- 配置DAO --> 
                     < bean id ="userDaoTarget" class ="com.bluesky.spring.dao.UserDaoImpl" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 
           
                     < bean id ="userDao" parent ="transactionBase" > 
                     < property name ="target" ref ="userDaoTarget" /> 
                     </ bean > 
          </ beans > 

          第三種方式：使用攔截器

          

          <? 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:aop           ="http://www.springframework.org/schema/aop" 
           xsi:schemaLocation           ="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"           > 

                     < bean id ="sessionFactory" 
           class           ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
                     < property name ="configLocation" value ="classpath:hibernate.cfg.xml" /> 
                     < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration" /> 
                     </ bean > 

                     <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> 
                     < bean id ="transactionManager" 
           class           ="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 
           
                     < bean id ="transactionInterceptor" 
           class           ="org.springframework.transaction.interceptor.TransactionInterceptor" > 
                     < property name ="transactionManager" ref ="transactionManager" /> 
                     <!-- 配置事務(wù)屬性 --> 
                     < property name ="transactionAttributes" > 
                     < props > 
                     < prop key ="*" > PROPAGATION_REQUIRED </ prop > 
                     </ props > 
                     </ property > 
                     </ bean > 
           
                     < bean class ="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator" > 
                     < property name ="beanNames" > 
                     < list > 
                     < value > *Dao </ value > 
                     </ list > 
                     </ property > 
                     < property name ="interceptorNames" > 
                     < list > 
                     < value > transactionInterceptor </ value > 
                     </ list > 
                     </ property > 
                     </ bean > 
           
                     <!-- 配置DAO --> 
                     < bean id ="userDao" class ="com.bluesky.spring.dao.UserDaoImpl" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 
          </ beans > 

          第四種方式：使用tx標(biāo)簽配置的攔截器
          

          <? 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:aop           ="http://www.springframework.org/schema/aop" 
           xmlns:tx           ="http://www.springframework.org/schema/tx" 
           xsi:schemaLocation           ="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"           > 

                     < context:annotation-config /> 
                     < context:component-scan base-package ="com.bluesky" /> 

                     < bean id ="sessionFactory" 
           class           ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
                     < property name ="configLocation" value ="classpath:hibernate.cfg.xml" /> 
                     < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration" /> 
                     </ bean > 

                     <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> 
                     < bean id ="transactionManager" 
           class           ="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 

                     < tx:advice id ="txAdvice" transaction-manager ="transactionManager" > 
                     < tx:attributes > 
                     < tx:method name ="*" propagation ="REQUIRED" /> 
                     </ tx:attributes > 
                     </ tx:advice > 
           
                     < aop:config > 
                     < aop:pointcut id ="interceptorPointCuts" 
           expression           ="execution(* com.bluesky.spring.dao.*.*(..))" /> 
                     < aop:advisor advice-ref ="txAdvice" 
           pointcut-ref           ="interceptorPointCuts" /> 
                     </ aop:config > 
          </ beans > 

          第五種方式：全注解

          

          <? 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:aop           ="http://www.springframework.org/schema/aop" 
           xmlns:tx           ="http://www.springframework.org/schema/tx" 
           xsi:schemaLocation           ="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"           > 

                     < context:annotation-config /> 
                     < context:component-scan base-package ="com.bluesky" /> 

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

                     < bean id ="sessionFactory" 
           class           ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
                     < property name ="configLocation" value ="classpath:hibernate.cfg.xml" /> 
                     < property name ="configurationClass" value ="org.hibernate.cfg.AnnotationConfiguration" /> 
                     </ bean > 

                     <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> 
                     < bean id ="transactionManager" 
           class           ="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
                     < property name ="sessionFactory" ref ="sessionFactory" /> 
                     </ bean > 
           
          </ beans > 


          此時在DAO上需加上@Transactional注解，如下：

          

          package com.bluesky.spring.dao;

          import java.util.List;

          import org.hibernate.SessionFactory;
          import org.springframework.beans.factory.annotation.Autowired;
          import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
          import org.springframework.stereotype.Component;

          import com.bluesky.spring.domain.User;

          @Transactional
          @Component(           " userDao " )
          public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

                     public List < User > listUsers() {
                     return this .getSession().createQuery( " from User " ).list();
           }
           
           
          }           
          
		
          
			posted on 2011-11-08 23:14 paulwong 閱讀(504) 評論(0)  編輯  收藏  所屬分類: SPRING 
		
          
	
          
	
	





          
	    
    




          








          

				

          



    







          
        
	




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