pengcheng_1024 Jaspersoft IReport Html中显示图片正常，但是导出excel和pdf时都报错！

Question

导出pdf时报： 
[2013-12-26.16:13:58]ERROR - [common.util.report.WabappJasperPrint:line 112]导出报表异常
net.sf.jasperreports.engine.JRException: Byte data not found at : ../dishpic/722f464f-3883-42aa-901f-21706da9c582.png
at net.sf.jasperreports.repo.RepositoryUtil.getBytesFromLocation(RepositoryUtil.java:324)
at net.sf.jasperreports.engine.JRImageRenderer.getImageData(JRImageRenderer.java:493)
at net.sf.jasperreports.engine.RenderableUtil.getOnErrorRendererForImageData(RenderableUtil.java:287)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportImage(JRPdfExporter.java:1239)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportElements(JRPdfExporter.java:854)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportFrame(JRPdfExporter.java:2664)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportElements(JRPdfExporter.java:862)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportFrame(JRPdfExporter.java:2664)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportElements(JRPdfExporter.java:862)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportPage(JRPdfExporter.java:818)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:695)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:396)
at common.util.report.ReportPdfExporter.export(ReportPdfExporter.java:21)
at common.util.report.WabappJasperPrint._exportFile(WabappJasperPrint.java:126)
at common.util.report.WabappJasperPrint.exportFile(WabappJasperPrint.java:109)
at common.util.report.WabappJasperPrint.renderOutputModel(WabappJasperPrint.java:104)
at com.hestia.mosa.report.service.ReportJasperServiceImpl.mosaMenuInfo(ReportJasperServiceImpl.java:2328)
at com.hestia.mosa.report.service.ReportJasperServiceImpl.navigation(ReportJasperServiceImpl.java:155)
at com.hestia.mosa.report.controller.ReportJasperController.report(ReportJasperController.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:471)
at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleRequestInternal(MultiActionController.java:408)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at common.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:149)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:123)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)