PDFBox outofmemory當打印

我有一個軟件直接用默認打印機打印PDF文件的問題。有時我會在用戶打印PDF文件時收到OutOfMemoryError，但我不知道是什麼問題。PDFBox outofmemory當打印

java.lang.OutOfMemoryError: Java heap space 
    at java.awt.image.DataBufferInt.<init>(Unknown Source) 
    at java.awt.image.Raster.createPackedRaster(Unknown Source) 
    at java.awt.image.DirectColorModel.createCompatibleWritableRaster(Unknown Source) 
    at java.awt.image.BufferedImage.<init>(Unknown Source) 
    at org.apache.pdfbox.pdmodel.graphics.color.PDDeviceGray.toRGBImage(PDDeviceGray.java:78) 
    at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.from1Bit(SampledImageReader.java:216) 
    at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getRGBImage(SampledImageReader.java:142) 
    at org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:340) 
    at org.apache.pdfbox.rendering.PageDrawer.drawImage(PageDrawer.java:793) 
    at org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:62) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:815) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:472) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:446) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:178) 
    at org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:815) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:472) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:446) 
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:149) 
    at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:189) 
    at org.apache.pdfbox.rendering.PDFRenderer.renderPage(PDFRenderer.java:208) 
    at org.apache.pdfbox.rendering.PDFRenderer.renderPageToGraphics(PDFRenderer.java:169) 
    at org.apache.pdfbox.printing.PDFPrintable.print(PDFPrintable.java:184) 
    at sun.print.RasterPrinterJob.printPage(Unknown Source) 
    at sun.print.RasterPrinterJob.print(Unknown Source)

我使用此代碼來加載PDFBox並使用Java打印PDF文件。

try (PDDocument doc = PDDocument.load(fileToPrint)) { 

    PrinterJob job = PrinterJob.getPrinterJob(); 

    job.setJobName(jobName); 
    job.setPageable(new PDFPageable(doc, Orientation.AUTO, false, 300)); 
    job.setPrintService(printerService); 

    ... 

    job.print(attributes); 

    ... 

} catch (IOException e) { 
    ... 
} catch (PrinterException e) { 
    ... 
}

方法與PDFBox的

@Test 
    public void currentVersionTest() throws IOException, PrinterException { 

     String jobName = testDocumentPdf.getFileName().toString(); 

     try (PDDocument doc = PDDocument.load(testDocumentPdf.toFile(), MemoryUsageSetting.setupTempFileOnly())) { 

     PrinterJob job = PrinterJob.getPrinterJob(); 

     job.setJobName(jobName); 
     job.setPageable(new PDFPageable(doc, Orientation.AUTO, false, 0)); 
     job.setPrintService(printService); 

     PrintRequestAttributeSet attributes = new HashPrintRequestAttributeSet(); 
     attributes.add(Chromaticity.MONOCHROME); 

     job.print(attributes); 

     } 

     checkJobInQueue(jobName); 
    }

來源

2017-04-24 fjtorres

內存消耗是依賴於幾個因素，打印諸如圖像，DPI設置的數量等。您可能需要調整應用程序的內存設置。

請看https://pdfbox.apache.org/2.0/faq.html#outofmemoryerror尋求一些改善內存需求/設置的建議。

來源

2017-04-24 08:56:19

謝謝@Maruan Sahyoun，我將改變代碼使用'PDDocument.load（文件，MemoryUsageSetting.setupTempFileOnly（））'而不是'PDDocument.load（文件）' – fjtorres

在審查了問題後，我發現了一件事。當我發送打印PDF文件的作業時，我可以看到打印機隊列中的大小，它太大了。例如，包含268頁的文檔顯示大小約爲8 GB。這很奇怪，例如打印使用福昕閱讀器的文檔大小是57 MB左右。文檔的實際大小爲12 MB，我使用Windows 7檢查作業大小。 – fjtorres

@fjtorres這很可能是因爲該文檔在由Java Printing API打印之前進行了光柵化處理。 –

PDFBox outofmemory當打印

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