使用JasperRunManager生成pdf報告

我想使用ejbql生成pdf報告，但我不知道該怎麼做。我試圖做泰豐以下，但錯誤occure：使用JasperRunManager生成pdf報告

parameterMap.put(JRJpaQueryExecuterFactory.PARAMETER_JPA_ENTITY_MANAGER, entityManager); 
parameterMap.put("priority", "3"); 
try 
{ 
JasperFillManager.fillReportToFile("C:/Documents and Settings/MyDocuments/NetBeansProjects/JiraMap/src/java/Reports/Test.jasper", parameterMap); 
JasperRunManager.runReportToPdfFile("C:/Documents and Settings/MyDocuments/NetBeansProjects/JiraMap/src/java/Reports/Test.pdf", parameterMap); 
} 
catch (JRException ex) 
{ 
ex.printStackTrace(); 
}

Tehb錯誤是：

net.sf.jasperreports.engine.JRException: Error loading object from file : C:\Documents and Settings\My Documents\NetBeansProjects\JiraMap\src\java\Reports\Test.pdf 
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:101) 
at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfFile(JasperRunManager.java:93) 
at Reporting.ReportBean.main(ReportBean.java:38) 
Caused by: java.io.EOFException

更新

我使用此代碼（我沒有使用任何參數）但總是報告爲空：

JasperReport report = JasperCompileManager.compileReport("C:/Documents and Settings/My Documents/NetBeansProjects/JiraMap/src/java/Reports/Test.jrxml"); 
JasperPrint print = JasperFillManager.fillReport(report,null); 
JasperExportManager.exportReportToPdfFile(print,"C:/Documents and Settings/My Documents/NetBeansProjects/JiraMap/src/java/Reports/Test.pdf");

我與聚合函數count（我曾嘗試使用別名爲numebr，但它沒有工作）報告：

<?xml version="1.0" encoding="UTF-8"?> 
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Test" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20"> 
<property name="ireport.zoom" value="1.0"/> 
<property name="ireport.x" value="0"/> 
<property name="ireport.y" value="0"/> 
<parameter name="priority" class="java.lang.String"> 
<defaultValueExpression><![CDATA[]]></defaultValueExpression> 
</parameter> 

<queryString language="ejbql"> 
    <![CDATA[select count(j) from Jiraissue j where j.priority='3']]> 
</queryString> 
    <field name="count(j)" class="java.lang.Long"/> 
<background> 
    <band splitType="Stretch"/> 
</background> 
<title> 
     <band height="79" splitType="Stretch"> 

    </band> 
</title> 
<pageHeader> 
    <band height="35" splitType="Stretch"/> 
</pageHeader> 
<columnHeader> 
    <band height="84" splitType="Stretch"> 
     <staticText> 
      <reportElement x="28" y="0" width="100" height="20"/> 
      <textElement/> 
      <text><![CDATA[count(j)]]></text> 
     </staticText> 

    </band> 
</columnHeader> 
<detail> 
    <band height="125" splitType="Stretch"> 
     <textField> 
      <reportElement x="50" y="11" width="100" height="20"/> 
      <textElement/> 
      <textFieldExpression class="java.lang.Long"> <![CDATA[$F{count(j)}]]></textFieldExpression> 
     </textField> 
    </band> 
</detail> 
<columnFooter> 
    <band height="45" splitType="Stretch"/> 
</columnFooter> 
<pageFooter> 
    <band height="54" splitType="Stretch"/> 
</pageFooter> 
<summary> 
    <band height="42" splitType="Stretch"/> 
</summary> 
</jasperReport>

的錯誤是：

net.sf.jasperreports.engine.JRException: Error retrieving field value from bean : count(j) 
at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDat aSource.java:123) 
at net.sf.jasperreports.engine.data.JRJpaDataSource$PropertyReader.getValue(JRJpaDataSource.java:206) 
at net.sf.jasperreports.engine.data.JRJpaDataSource.getFieldValue(JRJpaDataSource.java:131) 
at net.sf.jasperreports.engine.fill.JRFillDataset.setOldValues(JRFillDataset.java:821) 
at net.sf.jasperreports.engine.fill.JRFillDataset.next(JRFillDataset.java:785) 
at net.sf.jasperreports.engine.fill.JRBaseFiller.next(JRBaseFiller.java:1482) 
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:126) 
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:946) 
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:118) 
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:435) 
at Reporting.ReportBean.main(ReportBean.java:41) 
Caused by: java.lang.NoSuchMethodException: Unknown property 'count'+ on bean class 'class java.lang.Long' 
[EL Info]: 2011-06-29 11:05:12.606--ServerSession(27055962)--file:/C:/Documents and  Settings/a497165/My Documents/NetBeansProjects/JiraMap/build/web/WEB-INF/classes/_JiraMapPU logout successful 
at org.apache.commons.beanutils.PropertyUtilsBean.getMappedProperty(PropertyUtilsBean.java:624) 
at org.apache.commons.beanutils.PropertyUtilsBean.getMappedProperty(PropertyUtilsBean.java:570) 
at org.apache.commons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUtilsBean.java:758) 
at org.apache.commons.beanutils.PropertyUtilsBean.getProperty(PropertyUtilsBean.java:837) 
at org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:426) 
at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDataSource.java:111) 
... 10 more

來源

2011-06-28 rym

這是一部分我用JasperPrint生成的代碼;並將文件發送回瀏覽器響應。這雖然使用JDBC，而不是EJBQL。但是JasperReports代碼的一部分是一樣的。

   FileResolver fileResolver = new FileResolver() { 
              @Override 
              public File resolveFile(String fileName) { 
               return new File(getServletContext().getRealPath("/") + fileName); 
              } 
             }; 

      Map<String, Object> parameters = new HashMap<String, Object>(); 
      parameters.put("REPORT_FILE_RESOLVER", fileResolver); 

      ...... // blah blah 

      JasperPrint jrprint = JasperFillManager.fillReport(input, parameters, conn); 

      byte[] reportBytes; 

      jrprint.setName("MyFile." + fileFormat); 

      response.setContentType("APPLICATION/OCTET-STREAM"); 
      String disHeader = "Attachment;Filename=\"MyFile."; 

      ServletOutputStream os = response.getOutputStream(); 

       response.setHeader("Content-Disposition", disHeader); 

       reportBytes = JasperExportManager.exportReportToPdf(jrprint); 
       os.write(reportBytes);

來源

2011-06-28 13:39:12

您需要通過如下所需的所有參數：

JasperPrint jrprint = JasperFillManager.fillReport(input, parameters, connections);

來源

2014-01-29 13:58:14 user3249098

使用JasperRunManager生成pdf報告

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