PicRenamer


1   package SnowMailClient.utils;
2   
3   import java.io.*;
4   import java.nio.*;
5   import java.util.*;
6   import javax.imageio.*;
7   import java.awt.image.*;
8   
9   
10  /** convert/rewrite all images to PNG and jpeg in a directory and subdirectories
11  
12      PNG => PNG
13      the rest => JPEG
14  
15      Goal: progressive jpegs cause JVM crash when embedded in jar files !!
16  
17  */
18  public class PicRenamer
19  {
20  
21    public PicRenamer(File base)
22    {
23      Vector<File> im = new Vector<File>();
24      getImagesRecurse(im, base);
25  
26      System.out.println(""+im.size()+" images found in "+base.getAbsolutePath());
27  
28      String  [] wfn = ImageIO.getWriterFormatNames();
29      System.out.println("Supported Write Format");
30      for(int i=0; i<wfn.length; i++)
31      {
32        System.out.println("   "+wfn[i]);
33      }
34      System.out.println(".\n");
35  
36      for(int i=0; i<im.size(); i++)
37      {
38        try{
39         convertFiles( im.elementAt(i));
40        } catch(Exception   e) {e.printStackTrace();}
41      }
42  
43    }
44  
45  
46    /** convert GIF in PNG and rewrite jpegs
47    */
48    public void convertFiles(File in) throws Exception  
49    {
50      BufferedImage im = ImageIO.read(in);
51      String   outName = in.getAbsolutePath();
52      int posPt = outName.lastIndexOf(".");
53      String   originalExtension = outName.substring(posPt+1).toUpperCase();
54  
55      // delete the original
56      in.delete();
57  
58      if(originalExtension.equals("PNG") || originalExtension.equals("GIF"))
59      {
60        outName = outName.substring(0,posPt) + ".PNG";
61        //System.out.println("writing "+outName);
62        ImageIO.write(im, "PNG", new File(outName));
63      }
64      else
65      {
66        outName = outName.substring(0,posPt) + ".JPEG";
67        System.out.println("writing "+outName);
68        ImageIO.write(im, "JPEG", new File(outName));
69      }
70    }
71  
72  
73  
74    public void getImagesRecurse(Vector<File> im, File base)
75    {
76      for(File fi : base.listFiles())
77      {
78         if(fi.isDirectory())
79         {
80           getImagesRecurse(im, fi);
81         }
82         else
83         {
84           String   name = fi.getName().toUpperCase();
85           if(name.endsWith(".JPG")) im.add(fi);
86           if(name.endsWith(".BMP")) im.add(fi);
87           if(name.endsWith(".PNG")) im.add(fi);
88           if(name.endsWith(".GIF")) im.add(fi);
89         }
90      }
91    }
92  
93   /**
94    *  Static main method
95    */
96    public static void main( String  [] arguments )
97    {
98       new PicRenamer(new File("e:/temp/st"));
99    } // main
100 
101 
102 
103 } // PicRenamer
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