web.xml的配置¶

在web.xml中添加

<context-param>

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

<param-value>

classpath:/applicationContext-resources.xml

classpath:/applicationContext-dao.xml

classpath:/applicationContext-service.xml

classpath*:/applicationContext.xml

/WEB-INF/applicationContext*.xml

/WEB-INF/security.xml

/WEB-INF/dealer-security.xml

</param-value>

</context-param>



<listener>

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

</listener>

<listener>

<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>

</listener>

<listener>

<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>

</listener>

事務的配置¶

<aop:config>

<aop:advisor id="managerTx" advice-ref="txAdvice" pointcut="execution(* *..service.*Manager.*(..))" order="0" />

</aop:config>



<tx:advice id="txAdvice" transaction-manager="transactionManager">

<tx:attributes>

<tx:method name="find*" read-only="true"/>

<tx:method name="search*" read-only="true"/>

<tx:method name="get*" read-only="true"/>

<tx:method name="*"  rollback-for="Throwable"/>

</tx:attributes>

</tx:advice>

ApplicationContext.xml的配置（spring bean 的配置）¶

<!--ProductManager-START-->

<bean id="productManager" class="com.eryiju.service.product.impl.ProductManagerImpl">

<constructor-arg ref="productDao" />

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

</bean>



<!--ProductManager-END-->

<bean id="productDao" class="com.eryiju.dao.product.impl.ProductDaoHibernate">

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

</bean>



<bean id="brandDao" class="com.eryiju.dao.product.impl.BrandDaoHibernate">

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

</bean>

常見問題¶

如何與hibernate整合¶

<!-- Hibernate SessionFactory -->

<bean id="sessionFactory" 

class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

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

<property name="configLocation" value="classpath:hibernate.cfg.xml" />

<property name="hibernateProperties">

<value>

hibernate.dialect=${hibernate.dialect}

hibernate.query.substitutions=true 'Y', false 'N'

hibernate.cache.use_second_level_cache=true

hibernate.cache.use_query_cache=true

hibernate.cache.provider_class=com.eryiju.util.cache.EhCacheProvider

hibernate.show_sql=false

hibernate.connection.release_mode=after_statement

hibernate.cglib.use_reflection_optimizer=false

hibernate.search.default.directory_provider=org.hibernate.search.store.FSDirectoryProvider

hibernate.search.default.indexBase=/opt/dev/static/index

hibernate.jdbc.batch_size=50

hibernate.jdbc.fetch_size=50

</value>

<!-- Turn batching off for better error messages under PostgreSQL -->

</property>

</bean>

h2. (1)使用spring過濾器解決中文問題



在web.xml中添加：

<filter>

<filter-name>Spring character encoding filter</filter-name>

<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>GBK</param-value>

</init-param>

</filter>



<filter-mapping>

<filter-name>Spring character encoding filter</filter-name>

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

</filter-mapping>



h2. (2)將applicationContext.xml分解成多個文件



applicationContext-common.xml

"dataSource" 

"sessionFactory" 

事務相關



applicationContext-dao.xml

UserDAO



applicationContext-biz.xml

UserManager



applicationContext-action.xml

Action



struts-config.xml中要作修改：

<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">

<set-property property="contextConfigLocation" value="/WEB-INF/classes/applicationContext-*.xml" />

</plug-in>   

h2. Spring2.0中的注解實現事務管理



第一步:引入<tx:>命名空間 ,在spring的配置文件中修改, beans根元素里多了三行,如下

Xml代碼



<?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:tx="http://www.springframework.org/schema/tx"  

xsi:schemaLocation="http://www.springframework.org/schema/beans   

http://www.springframework.org/schema/beans/spring-beans-2.0.xsd   

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

http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> 



第二步:在spring的配置文件中修改,將所有具有@Transactional 注解的bean自動配置為聲明式事務支持

Java代碼



<!--JDBC事務管理器,根據你的情況使用不同的事務管理器,如果工程中有Hibernate,就用Hibernate的事務管理器 -->    

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  

<property name="dataSource">  

<ref local="dataSource"/>  

</property>  

</bean>     



<!-- 用注解來實現事務管理 -->  

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



第三步: 在接口或類的聲明處 ,寫一個@Transactional. 要是只的接口上寫, 接口的實現類就會繼承下來.

接口的實現類的具體方法,還可以覆蓋類聲明處的設置.

Java代碼



@Transactional

public class TestPOAOImpl extends POAOBase implements TestPOAO  

{     

@Transactional(isolation = Isolation.READ_COMMITTED)  

public void test1()  

{  

String sql = "INSERT INTO sy_test (NAME,AGE) VALUES('注解趙云',30)";  

execute(sql);  



sql = "INSERT INTO sy_test (NAME,AGE) VALUES('注解張飛',26)";  

execute(sql);  



int a = 9 / 0; //異常  



sql = "INSERT INTO sy_test (NAME,AGE) VALUES('注解關羽',33)";  

execute(sql);  

System.out.println("走完了");  

}  

//execute() 方法略...  

} 



注意的幾點:



1 @Transactional 只能被應用到public方法上, 對于其它非public的方法,如果標記了@Transactional也不會報錯,但方法沒有事務功能.

2 默認情況下,一個有事務方法, 遇到RuntiomeException 時會回滾 .  遇到 受檢查的異常 是不會回滾 的. 要想所有異常都回滾,要加上 @Transactional( rollbackFor={Exception.class,其它異常}) .