一：問題
最近發現了我們自己的項目的事務的處理根本就是行不通的，也因此我自己又去看了下有關事務的處理，算是有了個大致的了解吧，先說說我們最初的配置吧。
二：內容
（1）：使用iBatis的事務管理
SqlMapClient client = this.getSqlMap();
try {
client.startTransaction();
client.insert("addUser", user);
client.getCurrentConnection().commit();;
int i = 3/0;
} catch (Exception e) {
throw new RuntimeException();
}
這種形式下的事務根本就沒有用處的，最后搜索了下，又看了相應的說明，發現如下：
所以，這里的事務寫法就必須如下了
SqlMapClient client = this.getSqlMap();
try {
client.startTransaction();
//必須設置
client.getCurrentConnection().setAutoCommit(false);
client.insert("addUser", user);
client.getCurrentConnection().commit();;
int i = 3/0;
} catch (Exception e) {
throw new RuntimeException();
}
加上這段事務之后，經過測試后的確是可以回滾了。
（2）：使用spring來管理事務
在使用spring來管理事務的同時，也有兩種形式：
(一)：使用注解
(二)：不使用注解，直接指定特定方法攔截，比如delete*,update*,save*等方法。
但是我們用的是spring4.1.11的jar文件，在使用注解的時候一直包錯誤
可以看看這個鏈接的說明http://zapone.org/bernadine/2015/01/07/nosuchmethoderror-aopnamespaceutils-registerautoproxycreatorifnecessarylorgspringframeworkbeansfactoryxmlparsercontextljavalangobjectv/
org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from file [D:\MyEclipse\wh\.metadata\.me_tcat7\webapps\graduate\WEB-INF\classes\applicationContext-bean.xml]; nested exception is java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:452) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parseInternal(AnnotationDrivenBeanDefinitionParser.java:54) at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:60) at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1427) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1417) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:174) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:144) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:100) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:510) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392) ... 27 more 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext listenerStart SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from file [D:\MyEclipse\wh\.metadata\.me_tcat7\webapps\graduate\WEB-INF\classes\applicationContext-bean.xml]; nested exception is java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:452) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parseInternal(AnnotationDrivenBeanDefinitionParser.java:54) at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:60) at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1427) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1417) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:174) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:144) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:100) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:510) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392) ... 27 more 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext startInternal SEVERE: Error listenerStart 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext startInternal SEVERE: Context [/graduate] startup failed due to previous errors 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.ApplicationContext log INFO: Closing Spring root WebApplicationContext 2015-05-07 14:01:05 INFO org.springframework.context.support.AbstractApplicationContext.doClose(862) | Closing Root WebApplicationContext: startup date [Thu May 07 14:01:05 CST 2015]; root of context hierarchy 2015-05-07 14:01:05 WARN org.springframework.context.support.AbstractApplicationContext.doClose(872) | Exception thrown from ApplicationListener handling ContextClosedEvent java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: Root WebApplicationContext: startup date [Thu May 07 14:01:05 CST 2015]; root of context hierarchy at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:344) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:331) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:869) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) 2015-05-07 14:01:05 WARN org.springframework.context.support.AbstractApplicationContext.doClose(880) | Exception thrown from LifecycleProcessor on context close java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: Root WebApplicationContext: startup date [Thu May 07 14:01:05 CST 2015]; root of context hierarchy at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:357) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:877) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext listenerStop SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:170) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:908) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:884) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724)
所以我只能不使用注解了。
事務一般是加到service層，這樣可以統一管理。
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<aop:config>
<aop:pointcut expression="execution(* com.wh.graduate.service.*.*(..))" id="serviceMethod" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/></tx:attributes>
</tx:advice>
</beans>
（3）：有關事務的try{}catch(Exception e){}的注意點
如果你的dao層或者service進行了異常的捕獲，那么你一定是需要拋出異常的。下面說明
A：如果你在dao層進行了異常的捕獲，那么你需要把異常拋出，如下
try{ getSqlMapClientTemplate().insert("addOrder", Order); }catch(Exception e){ throw new RuntimeException(); }
所以在這里有選擇，要么別try，這樣系統會自動捕;要try就需要拋出異常。對於service同理。
在調用處進行try，之后捕獲到錯誤，返回相應的錯誤提醒
（4）：總結
快畢業了，我也出來一年了啊，2015年的5月4號，我出來整整一年啊，一年我變了很多，一年我也成長了很多，在這一年里面我學習到了很多東西，知識都是一點點積累的啊，但是因此，我越做越覺得自己是個碼農，所以現在不知道是何去何從啊。我真的不想去做一個“為了敲代碼而敲代碼的人”。但是我現在就是碼農，為了完成任務而完成任務，我想學的更多，更多底層的東西，但是框架的源碼我自己看着好吃力啊，不過還是得堅持啊。最近准備學學c語言了，雖然以前學習過，但是那是四年前了，重新在學習一遍吧。知識永不止境啊。