Java.io.FileNotFoundException: 类路径资源[../ProductDao.class]无法打开，因为它不存在。

Question

Java.io.FileNotFoundException: 类路径资源[../ProductDao.class]无法打开，因为它不存在。

javaspringhibernatespring-mvcintellij-idea

3

我的项目结构如下所示。实际上，虽然文件存在，但我遇到了文件未找到的错误，并将下面的错误添加到了日志文件中。我是Intellej的新手，这是我的第一个项目，我尝试通过使用mysql连接数据库来制作一个音乐商店。我的application-context.xml如下所示，dispatcher和web.xml都是正确的。 application-context.xml project structure 我的日志文件如下：

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

错误原因: java.io.FileNotFoundException: 类路径资源 [com/emusicstore/Dao/ProductDao.class] 无法打开，因为它不存在在 org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) 处引发异常在 org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:50) 处引发异常在 org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:98) 处引发异常在 org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102) 处引发异常在 org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:93) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:621) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getInterfaces(ConfigurationClassParser.java:797) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:298) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:232) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199) 处引发异常在 org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:168) 处引发异常 ... 32 more

2016年3月18日10:37:15.310 严重错误 [http-nio-8080-exec-1] org.apache.catalina.core.StandardWrapperValve.invoke：为调度程序分配异常 java.io.FileNotFoundException: 无法打开类路径资源[com/emusicstore/Dao/ProductDao.class]，因为它不存在。 at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) at org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:50) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:98) at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:93) at org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:621) at org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getInterfaces(ConfigurationClassParser.java:797) at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:298) at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:232) at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199) at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:168) at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321) at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:678) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:520) at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) at javax.servlet.GenericServlet.init(GenericServlet.java:158) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

错误原因：java.io.FileNotFoundException: 类路径资源[com/emusicstore/Dao/ProductDao.class]无法打开，因为它不存在。在org.springframework.core.io.ClassPathResource.getInputStream（ClassPathResource.java:172）处在org.springframework.core.type.classreading.SimpleMetadataReader.（SimpleMetadataReader.java:50）处在org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader（SimpleMetadataReaderFactory.java:98）处在org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader（CachingMetadataReaderFactory.java:102）处在org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader（SimpleMetadataReaderFactory.java:93）处在org.springframework.context.annotation.ConfigurationClassParser.asSourceClass（ConfigurationClassParser.java:621）处在org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getInterfaces（ConfigurationClassParser.java:797）处在org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass（ConfigurationClassParser.java:298）处在org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass（ConfigurationClassParser.java:232）处在org.springframework.context.annotation.ConfigurationClassParser.parse（ConfigurationClassParser.java:199）处在org.springframework.context.annotation.ConfigurationClassParser.parse（ConfigurationClassParser.java:168）处 ... 32 more

2016年3月18日10:37:16.340 SEVERE [http-nio-8080-exec-3] org.apache.catalina.core.StandardWrapperValve.invoke 为dispatcher分配异常 java.io.FileNotFoundException：由于不存在，因此无法打开类路径资源[com/emusicstore/Dao/ProductDao.class] at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) at org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:50) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:98) at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:93) at org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:621) at org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getInterfaces(ConfigurationClassParser.java:797) at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:298) at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:232) at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199) at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:168) at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321) at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:678) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:520) at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) at javax.servlet.GenericServlet.init(GenericServlet.java:158) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)

- Apil Tiwari

今天遇到了类似的问题。删除（或将其移动到其他位置）.idea文件夹并创建一个新项目解决了它。 - cavpollo

1个回答

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- NagaRajendra · Accepted Answer

请检查目标文件夹，看看 ProductDao.class 是否存在，如果不存在，则没有编译它。我认为你有时在使用 Intellij 时目标文件夹会自动被排除，右键单击目标文件夹并选择取消排除即可。还要确保该类存在于 dao 包下，且名称相同。另外，请检查 bean 配置是否正确。

我看到你的 Target 文件夹已被排除，因此尝试取消排除，如果不起作用，请显示如何将 ProductDao 配置为 bean。