SpringSide开发实战（五）：兵马未动，粮草先行 - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-17
| } // 如果是bmp或者gif，则缩略图为png格式 if (extension.equalsIgnoreCase( " bmp " ) || extension.equalsIgnoreCase( " gif " )) { extension = " png " ; destinationFileName = destinationFileName.substring( 0 , destinationFileName.lastIndexOf( '' . '' )) + " . " + extension; } File destinationFile = new File (destinationFileName); ImageIO.write(destinationImage, extension, destinationFile); } else { BufferedImage destinationImage; if (( float )sourceWidth / destinationWidth > ( float )sourceHeight / destinationHeight) { // 先裁 减 int x = sourceWidth - ( int )(sourceHeight * (( float )destinationWidth / destinationHeight)); Image clipedImage = image.getSubimage(( int )( 0.5 * x), 0 , ( int )(sourceHeight * (( float )destinationWidth / destinationHeight)), sourceHeight); // 后缩放 Image scaledImage = clipedImage.getScaledInstance(destinationWidth, destinationHeight, Image.SCALE_DEFAULT); destinationImage = new BufferedImage(destinationWidth, destinationHeight,BufferedImage.TYPE_INT_RGB); Graphics2D graphics = destinationImage.createGraphics(); graphics.drawImage(scaledImage, 0 , 0 , null ); } else { // 先裁减 int y = sourceHeight - ( int ) (sourceWidth * (( float )destinationHeight / destinationWidth)); Image clipedImage = image.getSubimage( 0 , ( int )( 0.5 * y), sourceWidth, ( int )(sourceWidth * (( float )destinationHeight / destinationWidth))); // 后缩放 Image scaledImage = clipedImage.getScaledInstance(destinationWidth, destinationHeight, Image.SCALE_DEFAULT); destinationImage = new BufferedImage(destinationWidth, destinationHeight,BufferedImage.TYPE_INT_RGB); Graphics2D graphics = destinationImage.createGraphics(); graphics.drawImage(scaledImage, 0 , 0 , null ); } // 如果是bmp或者gif，则缩略图为png格式 if (extension.equalsIgnoreCase( " bmp " ) || extension.equalsIgnoreCase( " gif " )) { extension = " png " ; destinationFileName = destinationFileName.substring( 0 , destinationFileName.lastIndexOf( '' . '' )) + " . " + extension; } File destinationFile = new File (destinationFileName); ImageIO.write(destinationImage, extension, destinationFile); } } // 生成验证码的方法 public BufferedImage createValidateImage(HttpSession session) { BufferedImage validateImage = new BufferedImage( 80 , 20 |
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