spring 详细配备

spring 详细配置

PROPAGATION_REQUIRED -- 支持当前事务，如果当前没有事务，就新建一个事务。这是最常见的选择。?
PROPAGATION_SUPPORTS -- 支持当前事务，如果当前没有事务，就以非事务方式执行。?
PROPAGATION_MANDATORY -- 支持当前事务，如果当前没有事务，就抛出异常。?
PROPAGATION_REQUIRES_NEW -- 新建事务，如果当前存在事务，把当前事务挂起。?
PROPAGATION_NOT_SUPPORTED -- 以非事务方式执行操作，如果当前存在事务，就把当前事务挂起。?
PROPAGATION_NEVER -- 以非事务方式执行，如果当前存在事务，则抛出异常。?
PROPAGATION_NESTED -- 如果当前存在事务，则在嵌套事务内执行。如果当前没有事务，则进行与PROPAGATION_REQUIRED类似的操作。?

Spring事务配置的五种方式

??? 前段时间对Spring的事务配置做了比较深入的研究，在此之间对Spring的事务配置虽说也配置过，但是一直没有一个清楚的认识。通过这次的学习发觉Spring的事务配置只要把思路理清，还是比较好掌握的。

??? 总结如下：

??? Spring配置文件中关于事务配置总是由三个组成部分，分别是DataSource、TransactionManager和代理机制这三部分，无论哪种配置方式，一般变化的只是代理机制这部分。

??? DataSource、TransactionManager这两部分只是会根据数据访问方式有所变化，比如使用Hibernate进行数据访问时，DataSource实际为SessionFactory，TransactionManager的实现为HibernateTransactionManager。

??? 具体如下图：

??? 根据代理机制的不同，总结了五种Spring事务的配置方式，配置文件如下：

??? 第一种方式：每个Bean都有一个代理

<?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>??

????<!--?定义事务管理器（声明式的事务）?-->??
????<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">??
???????????<!--?配置事务管理器?-->??
???????????<property?name="transactionManager"?ref="transactionManager"?/>?????
????????<property?name="target"?ref="userDaoTarget"?/>??
?????????<property?name="proxyInterfaces"?value="com.bluesky.spring.dao.GeneratorDao"?/>
????????<!--?配置事务属性?-->??
????????<property?name="transactionAttributes">??
????????????<props>??
????????????????<prop?key="*">PROPAGATION_REQUIRED</prop>
????????????</props>??
????????</property>??
????</bean>??
</beans>

??? 第二种方式：所有Bean共享一个代理基类

<?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>??

????<!--?定义事务管理器（声明式的事务）?-->??
????<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">??
????????<!--?配置事务管理器?-->??
????????<property?name="transactionManager"?ref="transactionManager"?/>??
????????<!--?配置事务属性?-->??
????????<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>

第三种方式：使用拦截器

<?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>??

????<!--?定义事务管理器（声明式的事务）?-->??
????<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"?/>??
????????<!--?配置事务属性?-->??
????????<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>

第四种方式：使用tx标签配置的拦截器

<?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>??

????<!--?定义事务管理器（声明式的事务）?-->??
????<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>

第五种方式：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>??

????<!--?定义事务管理器（声明式的事务）?-->??
????<bean?id="transactionManager"
??????? class="org.springframework.orm.hibernate3.HibernateTransactionManager">
????????<property?name="sessionFactory"?ref="sessionFactory"?/>
????</bean>
????
</beans>

此时在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();
??? }
????
????
}
转载?http://www.blogjava.net/robbie/archive/2009/04/05/264003.html

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