我正在开发一个java web应用程序，我在其中使用类似于maven的项目管理工具，现在我对这个问题变得疯狂。
我尝试从我的应用程序构建一个 jasper 报告，该报告由 src/main/resources 中的许多子报告组成。
我尝试通过以下方式加载这些子报表：
//Sub Report 1
InputStream fileSubRep1=(BufferedInputStream) getClass().getResourceAsStream("/fileSubReport1.jasper");
map.put("fileSubRep1",(JasperReport) JRLoader.loadObject(fileSubRep1));
//Sub Report 2
InputStream fileSubRep2=(BufferedInputStream) getClass().getResourceAsStream("/fileSubReport2.jasper");
map.put("fileSubRep1",(JasperReport) JRLoader.loadObject(fileSubRep2));
问题是这个方法的调用JRLoader.loadObject(fileSubRep1)生成以下异常：
net.sf.jasperreports.engine.JRException: Error loading object from InputStream
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:248)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:228)
at it.aiemonline.report.jasper.GeneraFattureServiceImpl.createMapFileJasper(GeneraFattureServiceImpl.java:292)
at it.aiemonline.report.jasper.GeneraFattureServiceImpl.executeStreamByteFatturaPdf(GeneraFattureServiceImpl.java:890)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
at it.aiemonline.utility.logger.SystemLogger.aroundExecuteLog(SystemLogger.java:187)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy78.executeStreamByteFatturaPdf(Unknown Source)
at it.aiemonline.vaadin.application.gui.fatturazione.visualizza.VisualizzaFatturaPanel.visualizzaPdf(VisualizzaFatturaPanel.java:236)
at it.aiemonline.vaadin.application.gui.fatturazione.visualizza.VisualizzaFatturaPanel$1.itemClick(VisualizzaFatturaPanel.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:969)
at com.vaadin.ui.Table.handleClickEvent(Table.java:3057)
at com.vaadin.ui.Table.changeVariables(Table.java:2853)
at com.vaadin.server.communication.ServerRpcHandler.changeVariables(ServerRpcHandler.java:396)
at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:221)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1382)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
at org.eclipse.jetty.server.Server.handle(Server.java:346)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1065)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:823)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:220)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.StreamCorruptedException: invalid stream header: EFBFBDEF
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.<init>(ContextClassLoaderObjectInputStream.java:58)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:243)
... 69 more
我哪里做错了？
我该如何修复它？
经过三天的头痛，我终于解决了我的问题。我正在使用类似 Maven 的项目管理工具，并且正在开发具有这种结构的模块化项目
|-- parent
|-- model
--pom.xml
|-- services
--pom.xml
|-- web-app
--pom.xml
问题是我尝试像输入流一样加载的文件位于服务模块中的 src/main/resources 中，但在 Web 应用程序的 pom.xml 中我启用了资源过滤，并且由于该 Web 应用程序模块依赖于服务的过滤在服务模块中得到扩展。
在 Maven 网站的过滤部分过滤 http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html我发现：
Warning:不要过滤具有二进制内容（例如图像）的文件！这很可能会导致输出损坏。如果您同时拥有文本文件和二进制文件作为资源，则需要声明两个互斥的资源集。第一个资源集定义要过滤的文件，另一个资源集定义要复制而不更改的文件，如下所示：
然后我从我的网络应用程序模块中删除了以下代码，一切正常
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
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