從磁盤讀取圖像時出現ArrayOutOfBoundsException

此刻我正嘗試在java中打印一些pdf。使用的api是2.0版本中的Apache PDF Box。轉換圖像後，我將它們寫入磁盤以節省內存。在接下來的步驟中，我再次閱讀它們並在圖像頭部寫入標題。之後我再寫一遍。爲了使用它們，我再次分開閱讀它們。當我看到他們最後一次我得到以下異常每200-300圖片：從磁盤讀取圖像時出現ArrayOutOfBoundsException

java.lang.IndexOutOfBoundsException: off < 0 || len < 0 || off+len > b.length || off+len < 0! 
at javax.imageio.stream.MemoryCacheImageInputStream.read(MemoryCacheImageInputStream.java:100) 
    at com.sun.imageio.plugins.common.SubImageInputStream.read(SubImageInputStream.java:61) 
    at com.sun.imageio.plugins.common.InputStreamAdapter.read(InputStreamAdapter.java:47) 
    at java.io.SequenceInputStream.read(SequenceInputStream.java:207) 
    at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:238) 
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158) 
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) 
    at java.io.BufferedInputStream.read(BufferedInputStream.java:265) 
    at java.io.FilterInputStream.read(FilterInputStream.java:83) 
    at com.sun.imageio.plugins.png.PNGImageReader.decodePass(PNGImageReader.java:1104) 
    at com.sun.imageio.plugins.png.PNGImageReader.decodeImage(PNGImageReader.java:1215) 
    at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1330) 
    at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1606) 
    at javax.imageio.ImageIO.read(ImageIO.java:1448) 
    at javax.imageio.ImageIO.read(ImageIO.java:1400) 
    at my.code.Class.method()

我用下面的代碼來PDF文件轉換：

  final HashMap<Integer, File> images = new HashMap<>(); 
      PDDocument document = PDDocument.load(sourceFile); 

      PDFRenderer pdfRenderer = new PDFRenderer(document); 
      final ExecutorService service = Executors.newFixedThreadPool(4); 
      for (int page = 0; page < document.getNumberOfPages(); ++page) 
      { 
       final int finalPageNumber = page; 
       Runnable r =() -> { 
        try 
        { 
         //Java could only print with 72 dpi so I'll use it 
         BufferedImage image = pdfRenderer.renderImageWithDPI(finalPageNumber, 72); 
         File imageFile = new File(sourceFile.getAbsolutePath() + "-" + (finalPageNumber + 1) + ".png"); 
         ImageIO.write(image, "png", imageFile); 
         image.flush(); 
         images.put(finalPageNumber, imageFile); 
        } 
        catch (final IOException e) 
        { 
         e.printStackTrace(); 
        } 
       }; 
       Thread t = new Thread(r, page + ""); 
       t.setName("" + page); 
       service.submit(t); 
      }

以及讀取是下面的代碼使用：

  // example url: /tmp/example.pdf-17.png 
      Image i = ImageIO.read(url);

怎麼樣來解決這個問題

在此先感謝

丹尼爾Brenzel主任

編輯

什麼我忘了說我manualy添加標題的圖片：

   BufferedImage bimage = new BufferedImage( simple.getValue().getWidth(null), 
                     simple.getValue().getHeight(null) + 50, 
                     BufferedImage.TYPE_INT_ARGB); 
       Graphics bGr = bimage.createGraphics(); 
       bGr.setColor(Color.WHITE); 
       bGr.fillRect(0, 0, bimage.getWidth(), bimage.getHeight()); 
       bGr.setFont(new Font("Arial", Font.PLAIN, 15)); 
       bGr.setColor(Color.BLACK); 
       bGr.drawImage(simple.getValue(), 0, 50, null); 
       bGr.drawString(entry.getValue(), 20, 20); 
       try 
       { 
        ImageIO.write(bimage, "PNG", new File(simple.getKey().toURI())); 
       } 
       catch (IOException | URISyntaxException e) 
       {      
        e.printStackTrace(); 
       } 
       bGr.dispose();

這裏是鏈接到文件（可能與每個頁面一起）：

Image wich throw the exception

PDF file wich is used (generated by Word2007)

來源

2016-04-20 finder2

您可以附加導致此異常的文件之一，還是隨機發生？ – haraldK

@haraldK我認爲這是隨機發生的，因爲我已經用多個來源的多個文件進行了嘗試，但我會附上一些示例文件。 – finder2

@RobertoDeLaParra有沒有什麼不同？該值在此位置不被使用 – finder2