当有更多数据时，Jasper报告将以PDF格式导出空数据 [英] Jasper report exports empty data in PDF format when there is more data

问题描述

我有一个报告，可以使用jasper报告以excel，pdf和word格式导出.我使用xml文件作为报告的数据源，但是当数据增加时，碧玉报告仅以PDF格式导出空文件，当我减少数据内容时，它将正确导出可用的数据. pdf大小有限制吗? ，如何从Java管理jasper报告中的大小?

I have a report to be exported in excel, pdf and word using jasper reports. I use xml file as the DataSource for the report, but when the data increases jasper report exports empty file in only for PDF format, when i reduce the data content it export the data available correctly. is there any limitation to pdf size? , how can we manage the size in jasper reports from java?

我的jrxml非常大，所以我不能在这里添加它，我添加了我用于导出内容的java代码:

My jrxml is really big, so i cannot add it here, i have added my java code which i use to export the content:

JRAbstractExporter exporter = null;
if (format.equals("pdf")) {
    exporter = new JRPdfExporter();
    jasperPrint.setPageWidth(Integer.parseInt(pWidth));
} else if (format.equals("xls")) {
    exporter = new JRXlsExporter();

} else if (format.equals("doc")) {
    jasperPrint.setPageWidth(Integer.parseInt(pWidth));
}
exporter.setParameter(JRExporterParameter.JASPER_PRINT,
        jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,
        outputStream_);
exporter.exportReport();
contents = outputStream_.toByteArray();
response.setContentType("application/" + format);
response.addHeader("Content-disposition",
        "attachment;filename=" + name.toString() + "." + format);

推荐答案

尝试设置内容长度:

response.setContentLength(outputStream_.toByteArray().length)

看看这是否可以解决您的问题.

See if this resolves your problem.

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