如何将文本文件转换为java中的TIF文件

Question

我想使用java将文本文件转换为TIF文件，我只能使用opensourec第三部分jar。 任何人都可以建议任何可用的工具/罐子？ 我已经看到Aspose有能力，但我在寻找开源，我试过pdfbox但没有太大的帮助。

的Aspose确实是这样：

// 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

我能够做到这一点，如下所示： 1.阅读txt文件，并使用PDFBOX 2.Convert的pdf格式为TIF图像从它创建PDF使用pdfbox。 以下是snipet代码

罐子使用; 1.pdfbox-APP-2.0.0.jar 2.xmpbox-1.8.9.jar 3.levigo-JBIG2-的ImageIO-1.6.1.jar 4.j​​ai_imageio-1.1.jar 5.jai_core-1.1 .3.jar 6.jai_codec-1.1.3.jar 7.commons测井-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; 
    }