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    JAVA中图片文件的缩放 | 
   
  
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     作者:未知  来源:月光软件站  加入时间:2005-2-28 月光软件站  | 
   
  
    需要对图片进行处理,使之能够适当的显示在画面中。
找到一些资料后,处理也比较简单
代码:
/*
 *     AndyChen([email protected])
 *
**/
public static Icon getFixedBoundIcon(String filePath, int height, int width) throws Exception{
		double Ratio=0.0;   //缩放比例
		File F = new File(filePath);
		if (!F.isFile())
			throw new Exception(F+" is not image file error in getFixedBoundIcon!");
		Icon ret = new ImageIcon(filePath);
		BufferedImage Bi = ImageIO.read(F);
		if ((Bi.getHeight()>height) || (Bi.getWidth()>width)){
			if (Bi.getHeight()>Bi.getWidth()){
				Ratio = (new Integer(height)).doubleValue() /Bi.getHeight();
			} else {
				Ratio = (new Integer(width)).doubleValue()/Bi.getWidth();
			}
			File ThF = new File(filePath+"_"+height +"_"+width); 
			Image Itemp = Bi.getScaledInstance (width,height,Bi.SCALE_SMOOTH);
			AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(Ratio, Ratio), null);
			Itemp = op.filter(Bi, null);
	
			try {
				ImageIO.write((BufferedImage)Itemp, "jpg", ThF);
			
				ret = new ImageIcon(ThF.getPath());
			}catch (Exception ex) {
			 
			}
		}
		return ret;
	}	
 
 
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