import?com.sun.image.codec.jpeg.JPEGImageEncoder;
?
public?class?BmpReader?{
?
????/**
?????*?圖片格式轉換?BMP?->?JPG
?????*?@param?file
?????*?@param?dstFile
?????*/
????public?static?void?bmpTojpg（String?file?String?dstFile）?{
????????try?{
????????????FileInputStream?in?=?new?FileInputStream（file）;
????????????Image?TheImage?=?read（in）;
????????????int?wideth?=?TheImage.getWidth（null）;
????????????int?height?=?TheImage.getHeight（null）;
????????????BufferedImage?tag?=?new?BufferedImage（wideth?heightBufferedImage.TYPE_INT_RGB）;
????????????tag.getGraphics（）.drawImage（TheImage?0?0?wideth?height?null）;
????????????FileOutputStream?out?=?new?FileOutputStream（dstFile）;
????????????JPEGImageEncoder?encoder?=?JPEGCodec.createJPEGEncoder（out）;
????????????encoder.encode（tag）;
????????????out.close（）;
????????}?catch?（Exception?e）?{
????????????System.out.println（e）;
????????}
????}
?
????public?static?int?constructInt（byte[]?in?int?offset）?{
????????int?ret?=?（（int）?in[offset?+?3]?&?0xff）;
????????ret?=?（ret?<????????ret?=?（ret?<????????ret?=?（ret?<????????return?（ret）;
????}
?
????public?static?int?constructInt3（byte[]?in?int?offset）?{
????????int?ret?=?0xff;
????????ret?=?（ret?<????????ret?=?（ret?<????????ret?=?（ret?<????????return?（ret）;
????}
?
????public?static?long?constructLong（byte[]?in?int?offset）?{
????????long?ret?=?（（long）?in[offset?+?7]?&?0xff）;
????????ret?|=?（ret?<????????ret?|=?（ret?<????????ret?|=?（ret?<????????ret?|=?（ret?<????????ret?|=?（ret?<????????ret?|=?（ret?<????????ret?|=?（ret?<????????return?（ret）;
????}
?
????public?static?double?constructDouble（byte[]?in?int?offset）?{
????????long?ret?=?constructLong（in?offset）;
????????return?（Double.longBitsToDouble（ret））;
????}
?
????public?static?short?constructShort（byte[]?in?int?offset）?{
????????short?ret?=?（short）?（（short）?in[offset?+?1]?&?0xff）;
????????ret?=?（short）?（（ret?<????????return?（ret）;
????}
?
????static?class?BitmapHeader?{
????????public?int?iSize?ibiSize?iWidth?iHeight?iPlanes?iBitcount
????????????????iCompression?iSizeimage?iXpm?iYpm?iClrused?iClrimp;
?
????????//?讀取bmp文件頭信息
????????public?void?read（FileInputStream?fs）?throws?IOException?{
????????????final?int?bflen?=?14;
????????????byte?bf[]?=?new?byte[bflen];
????????????fs.read（bf?0?bflen）;
????????????final?int?bilen?=?40;
????????????byte?bi[]?=?new?byte[bilen];
????????????fs