JAVA语言如何对大图像进行转码、缩略处理

Question

问题描述：大小在100M~2G，格式为tiff、tif的图片，需要转成web能够预览的格式为JPG或PNG，大小在500kb左右的图片

Answer 1

ImageIO类和Java Advanced Imaging Api可行，给你一个官方的案例：

File inputFile = new File("originalImage.tif");
BufferedImage inputImage = ImageIO.read(inputFile);

int newWidth = 800; 
int newHeight = 600; 
BufferedImage scaledImage = new BufferedImage(newWidth, newHeight, inputImage.getType());
Graphics2D graphics2D = scaledImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2D.drawImage(inputImage, 0, 0, newWidth, newHeight, null);
graphics2D.dispose();
File outputFile = new File("scaledImage.jpg");
ImageIO.write(scaledImage, "jpg", outputFile);