话不多说上源码
//缩略图 public void thum(String src, String dst, int w, int h) throws IOException { BufferedImage bis = ImageIO.read(new File(src)); BufferedImage bid = new BufferedImage(w, h, 1); Graphics2D g = bid.createGraphics(); //将读取原文件 写在目标文件的 0,0 w h 范围 g.drawImage(bis, 0, 0, w, h, null); ImageIO.write(bid, "jpg", new FileOutputStream(dst)); g.dispose(); }