在Spring 3.o中，我试图使用以下方法将我的DAO图层对象注入我的singleTon bean：
ApplicationContext applicaionContext = new ClassPathXmlApplicationContext(ApplicationConstants.APP_PROPERTY_CONFIG_PATH);
TemplateManagementDAO templateManagementDAO =(TemplateManagementDAO) applicaionContext.getBean("templateManagementDAO");
但它给出了例外：
java.lang.NoClassDefFoundError: org.springframework.beans.FatalBeanException
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:983)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:879)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
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:580)
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 org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4655)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5364)
at com.sun.enterprise.web.WebModule.start(WebModule.java:345)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:986)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:970)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:704)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1649)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1254)
at com.sun.enterprise.server.WebModuleDeployEventListener.moduleDeployed(WebModuleDeployEventListener.java:182)
at com.sun.enterprise.server.WebModuleDeployEventListener.moduleDeployed(WebModuleDeployEventListener.java:278)
at com.sun.enterprise.admin.event.AdminEventMulticaster.invokeModuleDeployEventListener(AdminEventMulticaster.java:1005)
at com.sun.enterprise.admin.event.AdminEventMulticaster.handleModuleDeployEvent(AdminEventMulticaster.java:992)
at com.sun.enterprise.admin.event.AdminEventMulticaster.processEvent(AdminEventMulticaster.java:470)
at com.sun.enterprise.admin.event.AdminEventMulticaster.multicastEvent(AdminEventMulticaster.java:182)
at com.sun.enterprise.admin.server.core.DeploymentNotificationHelper.multicastEvent(DeploymentNotificationHelper.java:308)
at com.sun.enterprise.deployment.phasing.DeploymentServiceUtils.multicastEvent(DeploymentServiceUtils.java:231)
at com.sun.enterprise.deployment.phasing.ServerDeploymentTarget.sendStartEvent(ServerDeploymentTarget.java:298)
at com.sun.enterprise.deployment.phasing.ApplicationStartPhase.runPhase(ApplicationStartPhase.java:132)
at com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:108)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:966)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.start(PEDeploymentService.java:609)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.start(PEDeploymentService.java:653)
at com.sun.enterprise.admin.mbeans.ApplicationsConfigMBean.start(ApplicationsConfigMBean.java:773)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.admin.MBeanHelper.invokeOperationInBean(MBeanHelper.java:390)
at com.sun.enterprise.admin.MBeanHelper.invokeOperationInBean(MBeanHelper.java:373)
at com.sun.enterprise.admin.config.BaseConfigMBean.invoke(BaseConfigMBean.java:477)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.admin.util.proxy.ProxyClass.invoke(ProxyClass.java:90)
at $Proxy1.invoke(Unknown Source)
at com.sun.enterprise.admin.server.core.jmx.SunoneInterceptor.invoke(SunoneInterceptor.java:304)
at com.sun.enterprise.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:170)
at com.sun.enterprise.admin.jmx.remote.server.callers.InvokeCaller.call(InvokeCaller.java:69)
at com.sun.enterprise.admin.jmx.remote.server.MBeanServerRequestHandler.handle(MBeanServerRequestHandler.java:155)
at com.sun.enterprise.admin.jmx.remote.server.servlet.RemoteJmxConnectorServlet.processRequest(RemoteJmxConnectorServlet.java:122)
at com.sun.enterprise.admin.jmx.remote.server.servlet.RemoteJmxConnectorServlet.doPost(RemoteJmxConnectorServlet.java:193)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:291)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:666)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:597)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:872)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:264)
at com.sun.enterprise.web.connector.grizzly.WorkerThreadImpl.run(WorkerThreadImpl.java:117)
任何人都可以建议我为什么不能将DAO对象访问到bean层？ 谢谢， Gunjan Shah。
答案 0 :(得分：3)
在application-context.xml中定义：
<bean id="templateManagementDAO" class="yourPackage.TemplateManagementDAO" />
注意TemplateManagementDAO应该是实现类而不是接口。
答案 1 :(得分：1)
您需要先修复此异常
java.lang.NoClassDefFoundError: org.springframework.beans.FatalBeanException
这与任何Spring配置错误无关。你在类路径上有旧版本的Spring吗？
答案 2 :(得分：0)
在Spring Context配置文件中，如果您已激活包扫描以基于注释（）发现bean，则您也可以使用@Repository注释DAO类。
答案 3 :(得分：0)
我有同样的例外。它没有提供太多信息。通过大量的调试，我发现在实例化bean时我遇到了堆栈溢出异常。它是由两个用@Bean注释的工厂方法之间的无限递归调用给出的。
这是堆栈跟踪它死之前，也许它发生在你身上并且@Lazy注释有助于避免这个......
"main" prio=10 tid=0x09151000 nid=0x4c10 runnable [0xf733b000]
java.lang.Thread.State: RUNNABLE
at com.cme.datamine.elephant.config.ElephantConfig.fileRouters(ElephantConfig.java:276)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.CGLIB$fileRouters$14(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7$$FastClassByCGLIB$$1e5bbc2f.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.fileRouters(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1015)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:292)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.fileRouters(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig.faultToleranceArbiter(ElephantConfig.java:302)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.CGLIB$faultToleranceArbiter$15(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7$$FastClassByCGLIB$$1e5bbc2f.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.faultToleranceArbiter(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1015)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:292)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.faultToleranceArbiter(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig.fileRouters(ElephantConfig.java:292)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.CGLIB$fileRouters$14(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7$$FastClassByCGLIB$$1e5bbc2f.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.fileRouters(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1015)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:292)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.fileRouters(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig.writersRunners(ElephantConfig.java:256)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.CGLIB$writersRunners$13(<generated>)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7$$FastClassByCGLIB$$1e5bbc2f.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.cme.datamine.elephant.config.ElephantConfig$$EnhancerByCGLIB$$b38541f7.writersRunners(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1015)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:848)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:790)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
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$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:848)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:790)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
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:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0xe04f0fb8> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
- locked <0xe04f1df0> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
- locked <0xe04f1eb0> (a java.lang.Object)
at com.cme.datamine.elephant.launch.Launcher.createSpringContext(Launcher.java:109)
at com.cme.datamine.elephant.launch.Launcher.main(Launcher.java:55)
答案 4 :(得分：0)
问题的产生是因为我的应用程序intializer类在容器加载之前尝试访问DAO。
因此在使用lazy-init = true选项后，它可以正常工作。
<!-- LAZY LOAD THIS BEAN TO RESOLVE DAO INJECTION PROBLEM INTO THE BEAN -->
<bean id="selStartUpDataInitializer" class="com.eks.sel.service.SELStartUpDataInitializer"
factory-method="getInstance" lazy-init="true">
</bean>
供您进一步参考，以下是我使用过生成异常的DAO的类。
public class SELStartUpDataInitializer implements Cloneable{
private static SELStartUpDataInitializer selStartUpDataInitializer;
private static final Logger LOGGER =Logger.getLogger(SELStartUpDataInitializer.class);
private static Map<String,Object> staticContextMap = new HashMap<String, Object>();
//PRIVATE CONSTRUCTOR : FOR SINGLE TON
private SELStartUpDataInitializer(){
initializeTempalteDataFieldMap();
}
//OVERRIDE CLONNABLE METHOD
@Override
protected Object clone() throws CloneNotSupportedException {
if(selStartUpDataInitializer==null){
selStartUpDataInitializer = new SELStartUpDataInitializer();
}
return selStartUpDataInitializer;
}
//GET INSTANCE : USED BY BEAN TO INITIALIZE THE BEAN
public static synchronized SELStartUpDataInitializer getInstance(){
if(selStartUpDataInitializer==null){
selStartUpDataInitializer = new SELStartUpDataInitializer();
}
return selStartUpDataInitializer;
}
//INITIALIZE TEMPALTE DATA FILEDs : CALLED BY ONE TIME CONSTRUCTOR
public void initializeTempalteDataFieldMap(){
LOGGER.info("SELStartUPDataInitializer ... Initializing all temaplte data mapping fields ....");
Map<Integer, Map<String,String>> templateDatafieldMap = new HashMap<Integer, Map<String,String>>();
LOGGER.info("Loading application contex from the class path : STARTED");
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(ApplicationConstants.APP_RELOAD_PROPERTY_CONFIG_PATH);
LOGGER.info("Loading application contex from the class path : COMPLETED");
//ITS MANDATORY TO CAST BY INTERFACE. OTHERWISE $PROXY ERROR WILL BE GENERATED
ITemplateManagementDAO templateManagementDAO =(ITemplateManagementDAO) applicationContext.getBean("templateManagementDAO");
List<Template> templates = templateManagementDAO.findByStatus(1);
LOGGER.info("initializeDataFields, number of templates = "+templates.size());
for (Template template : templates) {
String base64TffFile = ApplicationConstants.BASE64_PREFIX +
new String(Base64.encodeBase64(template.getTemplateFile().getBytes()));
LOGGER.info("initializeDataFields, initializing templateId = "+template.getTemplateid()+".");
templateDatafieldMap.put(template.getTemplateid(), SELUtil.getDatafieldNames(base64TffFile));
LOGGER.info("initializeDataFields, templateId = "+template.getTemplateid()+" initialized.");
}
IDynamicAttributeDAO dynamicAttributeDAO =(IDynamicAttributeDAO) applicationContext.getBean("dynamicAttributeDAO");
staticContextMap.put(ApplicationConstants.TEMPLATE_DATAFIELD_MAP, templateDatafieldMap);
staticContextMap.put(ApplicationConstants.ECC5_SAPTODATAFIELD_MAP,dynamicAttributeDAO.getAllSAPtoDataFieldAttribsMap(SAPConstants.SAP_ECC5));
staticContextMap.put(ApplicationConstants.ECC6_SAPTODATAFIELD_MAP,dynamicAttributeDAO.getAllSAPtoDataFieldAttribsMap(SAPConstants.SAP_ECC6));
staticContextMap.put(ApplicationConstants.ALL_DYNAMICATTRIBS_MAP,dynamicAttributeDAO.getAllDynamicAttributesMap());
}
public Map<String, Object> getStaticContextMap() {
return staticContextMap;
}
}
在上面的课程中，我尝试使用ClassPathXMLApplicationContext重新加载/重新扫描bean。所以这里使用DAO时会产生异常。
尝试在完全扫描配置之前检索DAO并且所有bean都是初始化的。