PicRenamer


1   package snow.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 final 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    } // Constructor
46  
47  
48    /** convert GIF in PNG and rewrite jpegs
49    */
50    public void convertFiles(File in) throws Exception  
51    {
52      BufferedImage im = ImageIO.read(in);
53      String   outName = in.getAbsolutePath();
54      int posPt = outName.lastIndexOf(".");
55      String   originalExtension = outName.substring(posPt+1).toUpperCase();
56  
57      // delete the original
58      in.delete();
59  
60      if(originalExtension.equals("PNG") || originalExtension.equals("GIF"))
61      {
62        outName = outName.substring(0,posPt) + ".PNG";
63        //System.out.println("writing "+outName);
64        ImageIO.write(im, "PNG", new File(outName));
65      }
66      else
67      {
68        outName = outName.substring(0,posPt) + ".JPEG";
69        System.out.println("writing "+outName);
70        ImageIO.write(im, "JPEG", new File(outName));
71      }
72    }
73  
74  
75  
76    public void getImagesRecurse(Vector<File> im, File base)
77    {
78      for(File fi : base.listFiles())
79      {
80         if(fi.isDirectory())
81         {
82           getImagesRecurse(im, fi);
83         }
84         else
85         {
86           String   name = fi.getName().toUpperCase();
87           if(name.endsWith(".JPG")) im.add(fi);
88           if(name.endsWith(".BMP")) im.add(fi);
89           if(name.endsWith(".PNG")) im.add(fi);
90           if(name.endsWith(".GIF")) im.add(fi);
91         }
92      }
93    }
94  
95   /**
96    *  Static main method
97    */
98    public static void main( String  [] arguments )
99    {
100      new PicRenamer(new File("c:/sources/other/mail/client"));
101   } // main
102 
103 
104 
105 } // PicRenamer
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