java语言实现的修改图片大小

/** * 修改图片大小 */ public void alterSize(int new_w, int new_h) { java.io.File file = new java.io.File("d:\\13201668850.jpg"); if (file.exists()) System.out.println("文件存在"); else System.out.println("文件不存在"); String newUrlName = "d:\\13201668850new.jpg"; Image src = null; try { src = javax.imageio.ImageIO.read(file); java.awt.image.BufferedImage tag = new java.awt.image.BufferedImage( new_w, new_h, java.awt.image.BufferedImage.TYPE_INT_RGB); tag.getGraphics().drawImage(src, 0, 0, new_w, new_h, null); FileOutputStream newimage = new FileOutputStream(newUrlName); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage); encoder.encode(tag); // 近JPEG编码 newimage.close(); } catch (IOException ee) { ee.printStackTrace(); System.out.print("这里出错了"); } catch (Exception e) { e.printStackTrace(); } }