java - PDF盒打印: Null Pointer Exception while printing using PDFBox

Question

在 CentOS 的 Linux 中使用以下代码打印 pdf 文件时:

    PrinterJob job = PrinterJob.getPrinterJob();
    PDDocument pdf = PDDocument.load(new ByteArrayInputStream(out.toByteArray()));
    job.setPageable(new PDPageable(pdf, job));
    job.print();

抛出空指针异常:

2014-06-03 10:37:06 WARN  org.apache.pdfbox.util.PDFStreamEngine  PDFStreamEngine:542 - java.lang.NullPointerException
java.lang.NullPointerException
  at org.apache.pdfbox.pdmodel.font.PDCIDFont.getFontHeight(PDCIDFont.java:200)
  at org.apache.pdfbox.pdmodel.font.PDType0Font.getFontHeight(PDType0Font.java:119)
  at org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:401)
  at org.apache.pdfbox.util.operator.ShowTextGlyph.process(ShowTextGlyph.java:62)
  at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:529)
  at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:258)
  at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:225)
  at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:205)
  at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:154)
  at org.apache.pdfbox.pdmodel.PDPageable.print(PDPageable.java:195)
  at sun.print.RasterPrinterJob.printPage(RasterPrinterJob.java:1936)
  at sun.print.RasterPrinterJob.print(RasterPrinterJob.java:1431)
  at sun.print.RasterPrinterJob.print(RasterPrinterJob.java:1247)

当我们在 Windows 中执行相同的操作时，它工作正常。任何想法 ？请帮忙

Answer 1

这可能是因为字体在 linux/CentOs 上不可用。
您可以使用 acrobat reader 检查 pdf 中的字体。从文件菜单 -> 属性 -> 字体选项卡
安装这些字体并重试。