Jasper生成了Excel文件错误＆＃34; Excel在...中找到了不可读的内容。

Question

我使用Java和Jasper生成.xlsx格式的报告。 我成功了，我的应用程序中有组件，用数据创建实际报告。

最近我尝试添加另一个组件并且报告生成成功，但生成的.xslx文件不会以MS Excel或其他任何方式打开。

代码部分如下。

    ArrayList<ReportBean> reportBean =  new ArrayList<ReportBean>();

    response.setHeader("Content-Disposition",  "attachment;filename=BudgetaryQuote.xlsx");
    response.setContentType("application/xlsx");
    OutputStream outStream = response.getOutputStream();

    Report report = new Report(template, "xlsx", reportBean, outStream);
    //Report(String template, String format, ArrayList dataList,OutputStream outputStream) 
    report.generateReport();

在generateReport（）中，

        InputStream inputStream = new FileInputStream(new File(this.template));  
        JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(this.dataList); 
        JasperDesign jasperDesign = JRXmlLoader.load(inputStream); 
        JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, beanColDataSource);

        if(this.format.equalsIgnoreCase(XLSX)) {

            JRXlsxExporter Xlsxexporter = new JRXlsxExporter();
            Xlsxexporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
            Xlsxexporter.setParameter(JRExporterParameter.OUTPUT_STREAM,  outputStream);
            Xlsxexporter.exportReport();            

        }

.jrxml文件（它几乎是空白的）

     <?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="timeSheetDetailedReport" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="4ffef809-ea2d-4533-a0b9-bdd2d055afbe">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<background>
    <band splitType="Stretch"/>
</background>
<title>
    <band height="79" splitType="Stretch"/>
</title>
<pageHeader>
    <band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
    <band height="61" splitType="Stretch"/>
</columnHeader>
<detail>
    <band height="125" splitType="Stretch"/>
</detail>
<columnFooter>
    <band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
    <band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
    <band height="42" splitType="Stretch"/>
</summary>

图像中出现错误。 "Excel found unreadable content in filename.xls. Do you want to recover the contents of this workbook? If you trust the source of this workbook, click Yes."

如何检查文件有什么问题？