读取24位BMP图像并生成JPG缩略图(一)

读取24位BMP图像并生成JPG缩略图(一)(3)      (int)bi[4]&0xff;
     System.out.println("宽:"+nwidth);
            int nheight=(((int)bi[11]&0xff)<<24)       //源图高度
     (((int)bi[10]&0xff)<<16)
     (((int)bi[9]&0xff)<<8)
     (int)bi[8]&0xff;
     System.out.println("高:"+nheight);
            //位数
     int nbitcount=(((int)bi[15]&0xff)<<8) (int)bi[14]&0xff;
     System.out.println("位数:"+nbitcount);
            //源图大小
     int nsizeimage=(((int)bi[23]&0xff)<<24)
     (((int)bi[22]&0xff)<<16)
     (((int)bi[21]&0xff)<<8)
     (int)bi[20]&0xff;
     System.out.println("源图大小:"+nsizeimage);

            //对24位BMP进行解析
     if(nbitcount==24){
         int npad=(nsizeimage/nheight)-nwidth*3;
         int ndata[]=new int[nheight*nwidth];
         byte brgb[]=new byte[(nwidth+npad)*3*nheight];
         fs.read (brgb,0,(nwidth+npad)*3*nheight);
         int nindex=0;
         for(int j=0;j<nheight;j++){
      for(int i=0;i<nwidth;i++){
                 ndata [nwidth*(nheight-j-1)+i]=