从bean检索字段值时出错

本文介绍了从bean检索字段值时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在尝试使用 JasperReports 从Java生成报告时遇到问题，但出现错误.

I have a problem I'm trying to generate a report from java using JasperReports but i get an error.

public void init() throws JRException { list= efisionReporte(); JRBeanCollectionDataSource beanCollectionDataSource = new JRBeanCollectionDataSource(list); String reportPath = FacesContext.getCurrentInstance().getExternalContext().getRealPath("report2.jasper"); jasperPrint = JasperFillManager.fillReport(reportPath, new HashMap(), beanCollectionDataSource); } public void PDF() throws JRException, IOException { init(); HttpServletResponse httpServletResponse = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse(); httpServletResponse.addHeader("Content-disposition", "attachment; filename=report.pdf"); ServletOutputStream servletOutputStream = httpServletResponse.getOutputStream(); JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream); FacesContext.getCurrentInstance().responseComplete(); }

堆栈跟踪:

GRAVE: Se ha recibido 'net.sf.jasperreports.engine.JRException' al invocar la escucha de acción '#{liquidarComisionReporte.PDF()}' para el componente 'pdfreporte' GRAVE: net.sf.jasperreports.engine.JRException: Error retrieving field value from bean : nombretienda at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDataSource.java:123) at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getFieldValue(JRAbstractBeanDataSource.java:96) at net.sf.jasperreports.engine.data.JRBeanCollectionDataSource.getFieldValue(JRBeanCollectionDataSource.java:100) at net.sf.jasperreports.engine.fill.JRFillDataset.setOldValues(JRFillDataset.java:895) at net.sf.jasperreports.engine.fill.JRFillDataset.next(JRFillDataset.java:860) at net.sf.jasperreports.engine.fill.JRFillDataset.next(JRFillDataset.java:837) at net.sf.jasperreports.engine.fill.JRBaseFiller.next(JRBaseFiller.java:1434) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:126) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:836) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:765) at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:84) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:624) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:540) at com.itsolutions.nomina.vista.liquidarComision.liquidarComisionReporte.init(liquidarComisionReporte.java:100) at com.itsolutions.nomina.vista.liquidarComision.liquidarComisionReporte.PDF(liquidarComisionReporte.java:119) 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 javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:737) at javax.el.BeanELResolver.invoke(BeanELResolver.java:467) at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:254) at com.sun.el.parser.AstValue.invoke(AstValue.java:228) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:148) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) at javax.facesponent.UIComponentBase.broadcast(UIComponentBase.java:769) at javax.facesponent.UICommand.broadcast(UICommand.java:300) at javax.facesponent.UIViewRoot.broadcastEvents(UIViewRoot.java:794) at javax.facesponent.UIViewRoot.processApplication(UIViewRoot.java:1259) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NoSuchMethodException: Unknown property 'nombretienda' on class 'class [Ljava.lang.Object;' at org.apachemons.beanutils.PropertyUtilsBean.getSimpleProperty(PropertyUtilsBean.java:1322) at org.apachemons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUtilsBean.java:770) at org.apachemons.beanutils.PropertyUtilsBean.getProperty(PropertyUtilsBean.java:846) at org.apachemons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:426) at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDataSource.java:111) ... 61 more

推荐答案

您的bean看起来如何? 导致此错误的一个可能原因是您没有该字段的吸气剂.吸气剂必须遵守Java标准格式，因此在您的情况下，我想它将是getNombretienda().吸气剂也必须是public.

How does your bean look like? One possible cause of this error is that you do not have a getter for the field. The getters must respect the Java standard format, so in your case I suppose it would be getNombretienda(). Also the getters must be public.