JAI jar Package Conversion TIF file error resolution, multi-page TIF to multiple JPEG methods

1. Defining File Enumeration Classes

/** *  file Type Enumeration classes  * */public enum FileType {/**       * jepg.      */      jpeg ("FFD8FF"),              /**       * png.      */     png ("89504E47"),             /**       * gif.      */      gif ("47494638"),               /**        * TIFF.       */       tiff ("49492a00"),         /**        * tif.  &Nbsp;    */      tif ("49492a00"),            /**       * Windows  Bitmap.       */      bmp ("424D"),               /**        * Rich Text Format.       */      rtf ("7b5c727466"),               /**       * XML.        */      xml ("3c3f786d6c"),               /**       * HTML.        */ &nbSp;    html ("68746d6c3e"),           /**        * Adobe Acrobat.        */      pdf ("255044462d312e"),                  /**       * zip  archive.       */      zip ("504B0304"),               /**        * RAR Archive.       */       rar ("52617221"),               /**       * Wave.        */   &nBsp;  wav ("57415645"),               /**       * avi.       */       avi ("41564920");          private string value =  "";        private  FileType (String value)  {    this.value = value;     }        public string getvalue ()  {     return value;    }        public  void setvalue (String value)  {    this.value = value;     }}

2. Define the file type of the tool class to determine the file type

/**   *  file type Judging class    */  public final class  filetypejudge {              /**        * Constructor       */       private filetypejudge ()  {}               /**       *  Convert a file header to a 16 string        *        *  @param   Native byte       *  @return  16 binary string         */      private static string bytestohexstring (byte[] &NBSP;SRC) {                      &nbsP Stringbuilder stringbuilder = new stringbuilder ();               if  (src == null | |  src.length <= 0)  {                   return null;               }               for  (int i = 0; i < src.length; i++)  {                   int v  = src[i] & 0xFF;                   string hv = integer.tohexstring (v);                   if  (Hv.length ()  < 2)  {                        Stringbuilder.append (0);                   }                   stringbuilder.append (HV);               }               Return stringbuilder.tostring ();          }              /**        *  Get file Header        *        *   @param  filepath  file path        *  @return   file Header         *  @throws  IOException       */       private static string getfilecontent (String filepath)  throws  ioexception {                       byte[] b = new byte[28];                        inputstream inputstream = null;                       try {                inputStream = new  FileInputStream (FilePath);   &nBsp;            inputstream.read (b, 0,  ;           } catch  (IOException e)  {                E.printstacktrace ();                throw e;           } finally {                if  (inputstream  != null)  {                    try {                        inputstream.close ();                    } catch  (ioexception e)  {                         e.printstacktrace ();                        throw e;                    }                }            }           return  Bytestohexstring (b);        }       /**        *  Judging file Types        *         *  @param  filePath  file Paths        *  @return   File Type        */      public static  filetype gettype (String filepath)  throws IOException {                        String filehead = getfilecontent (FilePath);                       if  (filehead ==  null | |  filehead.length ()  == 0)  {                return null;            }                       filehead = filehead.touppercase ();                       filetype[] filetypes  = filetype.values ();                       for  (Filetype type : filetypes)  {               if  ( Filehead.startswith (Type.getvalue ()))  {                    return type;                }            }                       return null;       }   } 

3. When using the Jai jar package call, first determine the type, and then pass the specific parameters according to the specific type

/***     *  convert a single TIF to multiple JPEG files      *  @param   srcfile     *  @param  destFile     *  @return      */    private static List<String>  Convertmtiftomjpeg (String srcfile, string destfile)  {         List<String> jpegFiles = new ArrayList<String> ()  ;          try{              fileseekablestream ss = new fileseekablestream (SrcFile);              tiffdecodeparam param0 =  null;             TIFFEncodeParam  Param = new tiffencodepAram ();             jpegencodeparam  Param1 = new jpegencodeparam ();              filetype filetype = filetypejudge.gettype (srcfile);              ImageDecoder dec =  Imagecodec.createimagedecoder (Filetype.tostring (). toLowerCase (), &NBSP;SS,&NBSP;PARAM0);              int count = dec.getnumpages ();              param.setcompression ( TIFFENCODEPARAM.COMPRESSION_GROUP4);              param.setlittleendian (False);               for  (Int i = 0; i < count; i++)  {                  renderedimage page = dec.decodeasrenderedimage (i);                  file f = new  file (Destfile + i + dot + watermarkdownloadfiletype.jpeg.name (). toLowerCase ());                  parameterblock pb = new parameterblock ();                  pb.addsource (page);                  pb.add (F.toString ());                  pb.add ( WaterMarkDownloadFileType.JPEG.name ()); &NBSP;&NBSp;               pb.add (param1);                   Renderedop r = jai.create ("Filestore", Pb);                  r.dispose ();                  jpegfiles.add (destfile + i +  Dot + watermarkdownloadfiletype.jpeg.name (). toLowerCase ())  ;              }         }  catch  (ioexception e)  {              e.printstacktrace ();         }          return jpegfiles;    } 

JAI jar Package Conversion TIF file error resolution, multi-page TIF to multiple JPEG methods