问题1:WebLogic下Mybatis Error building SqlSession

工程在Tomcat下正常运行，放到weblogic下启动失败。后来发现是weblogic下jar与项目/lib下jar冲突。于是在WEB-INF/下添加weblogic.xml文件，优先使用WEB-INF/lib下jar包。文件内容如下：

<weblogic-web-app xmlns="http://www.bea.com/ns/weblogic/90"
	xmlns:j2ee="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.bea.com/ns/weblogic/90 http://www.bea.com/ns/weblogic/90/weblogic-web-app.xsd">
	<container-descriptor>
		<prefer-web-inf-classes>true</prefer-web-inf-classes>
	</container-descriptor>
</weblogic-web-app>

但添加后，原本可以正常使用的mybatis初始化不了SqlSession。把上面的文件删除就可以启动，加上就报错。异常如下：

<BEA-101162> <User defined listener com.lhd.framework.core.web.listener.StartupListner failed: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRoleBiz': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testSysUserService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testSysUserDao' defined in URL [zip:D:/oracle/Middleware/user_projects/domains/base_domain/servers/AdminServer/tmp/_WL_user/FlexPlatform/g6k8k4/war/WEB-INF/lib/_wl_cls_gen.jar!/com/lhd/demo/dao/user/TestSysUserDao.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [conf/spring-application.xml]: Invocation of init method failed; nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in SQL Mapper Configuration
### Cause: org.apache.ibatis.builder.BuilderException: Error evaluating XPath.  Cause: javax.xml.xpath.XPathExpressionException.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRoleBiz': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testSysUserService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testSysUserDao' defined in URL [zip:D:/oracle/Middleware/user_projects/domains/base_domain/servers/AdminServer/tmp/_WL_user/FlexPlatform/g6k8k4/war/WEB-INF/lib/_wl_cls_gen.jar!/com/lhd/demo/dao/user/TestSysUserDao.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [conf/spring-application.xml]: Invocation of init method failed; nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in SQL Mapper Configuration
### Cause: org.apache.ibatis.builder.BuilderException: Error evaluating XPath.  Cause: javax.xml.xpath.XPathExpressionException
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:300)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1064)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:574)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
	at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
	at com.lhd.framework.core.web.listener.StartupListner.contextInitialized(StartupListner.java:36)
	at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:481)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
	at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:181)
	at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1868)
	at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3154)
	at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1518)
	at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:484)
	at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)
	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
	at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)
	at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
	at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:247)
	at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)
	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
	at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)
	at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27)
	at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:671)
	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
	at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
	at weblogic.application.internal.SingleModuleDeployment.activate(SingleModuleDeployment.java:44)
	at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:161)
	at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79)
	at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:569)
	at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:150)
	at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:116)
	at weblogic.deploy.internal.targetserver.operations.StartOperation.doCommit(StartOperation.java:149)
	at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:323)
	at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:844)
	at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1253)
	at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:440)
	at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:163)
	at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:195)
	at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:13)
	at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:68)
	at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:545)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

调试源码最后发现XPathPaser类下DocumentBuilderFactory.newInstance在FactoryFinder.find时候返回类型为：org.apache.xerces.jaxp.DocumentBuilderFactory类。而在Weblogic下正常运行项目返回：weblogic.xml.jaxp.RegistryDocumentBuilderFactory类，

删除工程下xercesImpl-2.9.1-1.0.0.jar、xercesImpl-2.9.1-1.0.jar、xml-apis-1.0.b2-1.0.0.jar三个jar。再启动项目问题解决。