一：问题

最近发现了我们自己的项目的事务的处理根本就是行不通的，也因此我自己又去看了下有关事务的处理，算是有了个大致的了解吧，先说说我们最初的配置吧。

二：内容

（1）：使用iBatis的事务管理

  1.                SqlMapClient client = this.getSqlMap();
  2. 		try {
  3. 			client.startTransaction();
  4. 			client.insert("addUser", user);
  5. 			client.getCurrentConnection().commit();;
  6. 			int i = 3/0;
  7. 		} catch (Exception e) {
  8. 			throw new RuntimeException();
  9. 		}

　　这种形式下的事务根本就没有用处的，最后搜索了下，又看了相应的说明，发现如下：

所以，这里的事务写法就必须如下了

  1.  SqlMapClient client = this.getSqlMap();
  2. 		try {
  3. 			client.startTransaction();
  4.                         //必须设置
  5. 			client.getCurrentConnection().setAutoCommit(false);
  6. 			client.insert("addUser", user);
  7. 			client.getCurrentConnection().commit();;
  8. 			int i = 3/0;
  9. 		} catch (Exception e) {
  10. 			throw new RuntimeException();
  11. 		}

加上这段事务之后，经过测试后的确是可以回滚了。

（2）：使用spring来管理事务

在使用spring来管理事务的同时，也有两种形式：

(一)：使用注解

(二)：不使用注解，直接指定特定方法拦截，比如delete*,update*,save*等方法。

但是我们用的是spring4.1.11的jar文件，在使用注解的时候一直包错误

可以看看这个链接的说明http://zapone.org/bernadine/2015/01/07/nosuchmethoderror-aopnamespaceutils-registerautoproxycreatorifnecessarylorgspringframeworkbeansfactoryxmlparsercontextljavalangobjectv/

  1. 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
  2.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414)
  3.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
  4.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
  5.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
  6.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216)
  7.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187)
  8.     at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
  9.     at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
  10.     at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
  11.     at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
  12.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:452)
  13.     at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
  14.     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
  15.     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
  16.     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)
  17.     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
  18.     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
  19.     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  20.     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  21.     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
  22.     at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)
  23.     at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)
  24.     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  25.     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
  26.     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
  27.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  28.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  29.     at java.lang.Thread.run(Thread.java:724)
  30. Caused by: java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V
  31.     at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parseInternal(AnnotationDrivenBeanDefinitionParser.java:54)
  32.     at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:60)
  33.     at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)
  34.     at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1427)
  35.     at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1417)
  36.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:174)
  37.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:144)
  38.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:100)
  39.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:510)
  40.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)
  41.     ... 27 more
  42. 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext listenerStart
  43. SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
  44. 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
  45.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414)
  46.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
  47.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
  48.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
  49.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216)
  50.     at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187)
  51.     at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
  52.     at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
  53.     at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
  54.     at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
  55.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:452)
  56.     at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
  57.     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
  58.     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
  59.     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)
  60.     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
  61.     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
  62.     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  63.     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  64.     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
  65.     at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)
  66.     at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)
  67.     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  68.     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
  69.     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
  70.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  71.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  72.     at java.lang.Thread.run(Thread.java:724)
  73. Caused by: java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.registerAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/Object;)V
  74.     at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parseInternal(AnnotationDrivenBeanDefinitionParser.java:54)
  75.     at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:60)
  76.     at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)
  77.     at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1427)
  78.     at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1417)
  79.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:174)
  80.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:144)
  81.     at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:100)
  82.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:510)
  83.     at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)
  84.     ... 27 more
  85. 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext startInternal
  86. SEVERE: Error listenerStart
  87. 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext startInternal
  88. SEVERE: Context [/graduate] startup failed due to previous errors
  89. 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.ApplicationContext log
  90. INFO: Closing Spring root WebApplicationContext
  91. 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
  92. 2015-05-07 14:01:05 WARN org.springframework.context.support.AbstractApplicationContext.doClose(872) | Exception thrown from ApplicationListener handling ContextClosedEvent
  93. 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
  94.     at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:344)
  95.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:331)
  96.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:869)
  97.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836)
  98.     at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579)
  99.     at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115)
  100.     at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831)
  101.     at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478)
  102.     at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
  103.     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
  104.     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  105.     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  106.     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
  107.     at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)
  108.     at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)
  109.     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  110.     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
  111.     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
  112.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  113.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  114.     at java.lang.Thread.run(Thread.java:724)
  115. 2015-05-07 14:01:05 WARN org.springframework.context.support.AbstractApplicationContext.doClose(880) | Exception thrown from LifecycleProcessor on context close
  116. 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
  117.     at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:357)
  118.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:877)
  119.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836)
  120.     at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579)
  121.     at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115)
  122.     at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831)
  123.     at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478)
  124.     at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
  125.     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
  126.     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  127.     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  128.     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
  129.     at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)
  130.     at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)
  131.     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  132.     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
  133.     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
  134.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  135.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  136.     at java.lang.Thread.run(Thread.java:724)
  137. 五月 07, 2015 2:01:05 下午 org.apache.catalina.core.StandardContext listenerStop
  138. SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener
  139. java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext
  140.     at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:170)
  141.     at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:908)
  142.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:884)
  143.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836)
  144.     at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579)
  145.     at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115)
  146.     at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831)
  147.     at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478)
  148.     at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
  149.     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
  150.     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  151.     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  152.     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
  153.     at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)
  154.     at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)
  155.     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  156.     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
  157.     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
  158.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  159.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  160.     at java.lang.Thread.run(Thread.java:724)

所以我只能不使用注解了。

事务一般是加到service层，这样可以统一管理。

  1.     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  2.             <property name="dataSource" ref="dataSource"></property>
  3.     </bean>   
  4.  
  5. <aop:config>
  6.     <aop:pointcut expression="execution(* com.wh.graduate.service.*.*(..))" id="serviceMethod" />
  7.     <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
  8. </aop:config>
  9.  
  10. <tx:advice id="txAdvice" transaction-manager="transactionManager">
  11.             <tx:attributes>
  12.                 <tx:method name="*" propagation="REQUIRED"/></tx:attributes>
  13.             </tx:advice>
  14. </beans>

（3）：有关事务的try{}catch(Exception e){}的注意点

如果你的dao层或者service进行了异常的捕获，那么你一定是需要抛出异常的。下面说明

A：如果你在dao层进行了异常的捕获，那么你需要把异常抛出，如下

  1.    try{
  2.             getSqlMapClientTemplate().insert("addOrder", Order);
  3.         }catch(Exception e){
  4.             throw new RuntimeException();
  5.         }

所以在这里有选择，要么别try，这样系统会自动捕;要try就需要抛出异常。对于service同理。

在调用处进行try，之后捕获到错误，返回相应的错误提醒

（4）：总结

快毕业了，我也出来一年了啊，2015年的5月4号，我出来整整一年啊，一年我变了很多，一年我也成长了很多，在这一年里面我学习到了很多东西，知识都是一点点积累的啊，但是因此，我越做越觉得自己是个码农，所以现在不知道是何去何从啊。我真的不想去做一个“为了敲代码而敲代码的人”。但是我现在就是码农，为了完成任务而完成任务，我想学的更多，更多底层的东西，但是框架的源码我自己看着好吃力啊，不过还是得坚持啊。最近准备学学c语言了，虽然以前学习过，但是那是四年前了，重新在学习一遍吧。知识永不止境啊。

  1.

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