Wie konvertiert man Textdatei in TIF-Datei in Java

Question

Ich möchte Textdatei in TIF-Datei mit Java konvertieren, kann ich nur Opensourec 3. Teil Jar verwenden. Kann jemand irgendein verfügbares Dienstprogramm/Glas vorschlagen? Ich habe gesehen, Aspose hat die Fähigkeit, aber ich bin auf der Suche nach Open Source, habe ich versucht, pdfbox, aber ist nicht viel Hilfe.

Aspose tut es so aus:

// Read whole txt file into string. 
string txt = File.ReadAllText("in.txt"); 
// Insert string into document. 
DocumentBuilder builder = new DocumentBuilder(); 
builder.Write(txt); 
// Save output. 
builder.Document.Save("out.pdf"); 
builder.Document.Save("out.tiff"); 

Answer 1

ich in der Lage bin, dies zu tun, wie folgt: 1. die TXT-Datei lesen und PDF erzeugen sie PDFBox mit 2.Convert pdf zu TIF-Bild mit pdfbox. Unten ist der Code Snipet

Glas verwendet; 1.pdfbox-app-2.0.0.jar 2.xmpbox-1.8.9.jar 3.levigo-JBIG2-ImageIO-1.6.1.jar 4.jai_imageio-1.1.jar 5.jai_core-1.1 .3.jar 6.jai_codec-1.1.3.jar 7.commons-logging-1.1.3.jar

private static final float A4_SIZE_UNIT=2.8346457f; 
    public static final int FAILURE = 2; 
    public static final int BLANK = 0; 
    public static final int NOTBLANK = 1; 
    // value where we can consider that this is a blank image 
    // can be much higher depending of the TIF source 
    // (ex. scanner or fax) 
    public static final int BLANK_THRESHOLD = 1000; 
    public static final int MAXIMUM_WIDTH = 500; 
public static void convertTextToTif(String fileName) throws IOException { 


     String filenmewithoutExtn=fileName.substring(0, fileName.lastIndexOf(".")); 
     BufferedReader br = null; 
     String sCurrentLine; 
     PdfConverter t=new PdfConverter(); 
     PdfConverter.PageMetaData pmdata=t.new PageMetaData(); 
     pmdata.setLineCount(0); 
     pmdata.setyCount(820); 


     PDDocument document = new PDDocument(); 
     PDFont font = PDType1Font.HELVETICA; 

//For Each Page: 
     PDRectangle a4Size=new PDRectangle(210*A4_SIZE_UNIT,297*A4_SIZE_UNIT); 
     PDPage page = new PDPage(a4Size); 
     PDPageContentStream contentStream = new PDPageContentStream(document, page); 
     contentStream.setFont(font, 10); 

     br = new BufferedReader(new FileReader(fileName)); 

     while ((sCurrentLine = br.readLine()) != null) { 
      System.out.println(sCurrentLine); 
      sCurrentLine=removeUnicode(sCurrentLine); 
      writeToPdf(sCurrentLine,contentStream,pmdata); 
      if ((pmdata.getLineCount()%52)==0){ 
       pmdata.setLineCount(0); 
       pmdata.setyCount(820); 
       contentStream.close(); 
       document.addPage(page); 

        page = new PDPage(a4Size); 
       contentStream = new PDPageContentStream(document, page); 
       contentStream.setFont(font, 10); 
       if(pmdata.getLine()!=null){ 
       writeToPdf(pmdata.getLine(),contentStream,pmdata); 
       } 

      } 
     } 



     contentStream.close(); 
     document.addPage(page); 

//After All Content is written: 
     document.save(filenmewithoutExtn+".pdf"); 
     document.close(); 
     if (br != null)br.close(); 
     convertPDFtoTiff(filenmewithoutExtn+".pdf"); 
     File sFile = new File(filenmewithoutExtn+".pdf"); 
     sFile.delete(); 


    } 

    public static PdfConverter.PageMetaData writeToPdf(String line,PDPageContentStream contentStream,PdfConverter.PageMetaData pmdata) throws IOException{ 
     if(pmdata.getLineCount()!=0 && (pmdata.getLineCount()%52)==0) 
     { 
      pmdata.setLine(line); 
      return pmdata; 
     } 
     if(line.length()>95){ 
     String pageLenghthString=line.substring(0,95); 
     int lastSpaceIndex=pageLenghthString.lastIndexOf(" "); 
     String lineToPrint=null; 
     if(lastSpaceIndex>-1){ 
      lineToPrint=line.substring(0, lastSpaceIndex); 
     }else{ 
      lineToPrint=line; 
     } 

     contentStream.beginText(); 
     contentStream.moveTextPositionByAmount(20, pmdata.getyCount()); 
     contentStream.drawString(lineToPrint); 
     contentStream.endText(); 
     pmdata.setLineCount(pmdata.getLineCount()+1); 
     pmdata.setyCount(pmdata.getyCount()-15); 
     if(lastSpaceIndex>-1){ 
     writeToPdf(line.substring(lastSpaceIndex).trim(),contentStream,pmdata); 
     }else{ 
      writeToPdf(line.substring(95).trim(),contentStream,pmdata); 
     } 

     }else{ 
      pmdata.setLineCount(pmdata.getLineCount()+1); 
      contentStream.beginText(); 
      contentStream.moveTextPositionByAmount(20, pmdata.getyCount()); 
      pmdata.setyCount(pmdata.getyCount()-15); 
      contentStream.drawString(line); 
      contentStream.endText(); 

     } 

     return pmdata; 
    } 
    public class PageMetaData{ 
     private Integer lineCount; 
     private Integer yCount; 
     private String line; 
     public Integer getLineCount() { 
      return lineCount; 
     } 
     public void setLineCount(Integer lineCount) { 
      this.lineCount = lineCount; 
     } 
     public Integer getyCount() { 
      return yCount; 
     } 
     public void setyCount(Integer yCount) { 
      this.yCount = yCount; 
     } 
     public String getLine() { 
      return line; 
     } 
     public void setLine(String line) { 
      this.line = line; 
     } 

public static void convertPDFtoTiff(String fileName) throws IOException{ 


     System.out.println("Document convertion started"); 
     String sourceDir = fileName; // Pdf files are read from this folder 

     String filenameWithoutExtn=fileName.substring(0, fileName.lastIndexOf(".")); 
     String destinationDir = filenameWithoutExtn+".tif"; // converted images from pdf document are saved here 
     File logFile =null; 
     File destinationFile=null; 
     ImageOutputStream ios=null; 
     PDDocument document=null; 
     ImageWriter writer=null; 
     BufferedWriter fileWriter = null; 
    try{ 
     File sourceFile =new File(sourceDir); 
     logFile = new File(sourceDir.substring(0, sourceDir.lastIndexOf("\\"))+"/javalog.txt"); 
     fileWriter = new BufferedWriter(new FileWriter(logFile)); 
     destinationFile = new File(destinationDir); 

      ios = ImageIO.createImageOutputStream(destinationFile); 
      writer = ImageIO.getImageWritersByFormatName("tif").next(); 
      writer.setOutput(ios); 
      ImageWriteParam param = writer.getDefaultWriteParam(); 
      param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 
      param.setCompressionType("JPEG"); 
      param.setCompressionQuality(.5f); 


      document = PDDocument.load(sourceFile); 




      PDFRenderer renderer=new PDFRenderer(document); 
      int totalPages=document.getNumberOfPages(); 
      //System.out.println("Total pages to be converted -> "+ totalPages); 
      fileWriter.write("Total pages to be converted -> "+ totalPages); 
      int pageNumber = 1; 

      for (int count=0;count<totalPages;count++) { 

       BufferedImage image = renderer.renderImageWithDPI(count, 300); 

       BufferedImage blackAndWhiteRotated=null; 

       BufferedImage blackAndWhite = new BufferedImage(
         image.getHeight(null), image.getHeight(null), 
         BufferedImage.TYPE_BYTE_GRAY); 

         Graphics2D g2 = blackAndWhite.createGraphics(); 
         //g2.translate(170, 0); 
         g2.rotate(90.0 * Math.PI/180.0, 
           blackAndWhite.getWidth()/2.0 , blackAndWhite 
           .getHeight() /2.0); 


         g2.drawImage(image, 0, 0, null); 
         //g2.r 
         //g2.rotate(45); 

         AffineTransform identity = new AffineTransform(); 

         IIOImage img = new IIOImage(blackAndWhite, null, null); 


         if(pageNumber==1){ 
        writer.write(null, img, param); 

        } 
        else{ 
         writer.writeInsert(-1, img, param); 

        } 
        image.flush(); 
        g2.dispose();  
       pageNumber++; 
      } 

      fileWriter.write("Document converted successfully"); 
      //System.out.println("Image Created -> "+ destinationFile.getName()); 

      } 
      catch(Exception e){ 

       fileWriter.write(e.toString()); 
       e.printStackTrace(); 

      }finally{ 
       fileWriter.close(); 
       document.close(); 
        ios.flush(); 
        ios.close(); 
        writer.dispose(); 


      } 

      //System.out.println("Converted Images are saved at -> "+ destinationFile.getAbsolutePath()); 

      System.out.println("Document converted successfully"); 

    } 

/** 
    * Creates an Image from a byte array 
    * @param data 
    * @return Image 
    * @throws IOException 
    * @throws Exception 
    */ 
    public static Image load(byte[] data) throws IOException { 
     Image image = null; 
     SeekableStream stream; 
     String[] names =null; 
     ImageDecoder dec=null; 
     RenderedImage im=null; 
     try { 
      //Create data stream from byte array 
       stream = new ByteArraySeekableStream(data); 
       names = ImageCodec.getDecoderNames(stream); 
       //Create image decoder 
       if(names!=null){ 
      dec = 
       ImageCodec.createImageDecoder(names[0], stream, null); 
      im = dec.decodeAsRenderedImage(); 
       }else{ 
        return null; 
       } 
     } catch (IOException e) { 
      throw e; 

     } 


     //create image 
     image = PlanarImage.wrapRenderedImage(im).getAsBufferedImage(); 
     // scale-down the image , maximum width : 500 px 
     // to preserve memory 
     Image imageScaled = 
      image.getScaledInstance(MAXIMUM_WIDTH, -1, Image.SCALE_SMOOTH); 
     return imageScaled; 
     } 

    /** 
    * Converts an Image to a BufferedImage 
    * @param im une Image 
    * @return BufferedImage 
    */ 
    public static BufferedImage imageToBufferedImage(Image im) { 
     BufferedImage bi = new BufferedImage 
      (im.getWidth(null),im.getHeight(null),BufferedImage.TYPE_INT_RGB); 
     Graphics bg = bi.getGraphics(); 
     bg.drawImage(im, 0, 0, null); 
     bg.dispose(); 
     return bi; 
    }