JAVA中图片文件的缩放

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　　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(andy.chen.sh@gmail.com) * **/ 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; }

　　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(andy.chen.sh@gmail.com) * **/ 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; }

 

标签: JAVA  图片  文件  缩放  

上一帖《Java中文问题详解(高手必读）》  下一帖《java中文件长度的转换》

 

 

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