public static void changeImageNew(String path, String oldimg, String newimg, int n) {
try {
String path1=path+n+"/";
File file1=new File(path1);
if (!file1.exists()){
file1.mkdirs();
}
File file = new File(path + oldimg);
// Image img=null;以前使用
BufferedImage img=null;
try {
//解决图片变红的问题
Image src =Toolkit.getDefaultToolkit().getImage(file.getAbsolutePath());
img=ImageUtil.toBufferedImage(src);
// img = ImageIO.read(file);
}catch (Exception e){
System.out.println("文件异常");
}
// // 构造Image对象
int wideth = img.getWidth(null); // 得到源图宽
int height = img.getHeight(null); // 得到源图长
Map map= getMax(wideth,height);
String s=(String) map.get("name");
BufferedImage tag=null;
DecimalFormat df=new DecimalFormat("0.00");
if ("wideth".equals(s)){
tag = new BufferedImage(n ,(int)(height*Float.parseFloat(df.format((float)n/wideth))),
BufferedImage.TYPE_INT_RGB);
//加入Color.white可以去黑边
tag.getGraphics().drawImage(img, 0, 0, n, (int)(height*Float.parseFloat(df.format((float)n/wideth))), Color.white,null);
}else {
tag = new BufferedImage((int)(wideth*Float.parseFloat(df.format((float)n/height))) , n ,
BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(img, 0, 0, (int)(wideth*Float.parseFloat(df.format((float)n/height))) , n,Color.white, null);
}
FileOutputStream out = new FileOutputStream(path1 + newimg);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(tag); // 近JPEG编码
out.close();
} catch (IOException e) {
System.out.println("处理文件出现异常");
}
}
//处理图片红色
//经过查阅得知ImageIO.read()方法读取图片时可能存在不正确处理图片ICC信息的问题,ICC为JPEG图片格式中的一种头部信息,导致渲染图片前景色时蒙上一层红色
public static BufferedImage toBufferedImage(Image image) {
if (image instanceof BufferedImage) {
return (BufferedImage) image;
}
// This code ensures that all the pixels in the image are loaded
image = new ImageIcon(image).getImage();
BufferedImage bimage = null;
GraphicsEnvironment ge = GraphicsEnvironment
.getLocalGraphicsEnvironment();
try {
int transparency = Transparency.OPAQUE;
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
bimage = gc.createCompatibleImage(image.getWidth(null),
image.getHeight(null), transparency);
} catch (HeadlessException e) {
// The system does not have a screen
}
if (bimage == null) {
// Create a buffered image using the default color model
int type = BufferedImage.TYPE_INT_RGB;
bimage = new BufferedImage(image.getWidth(null),
image.getHeight(null), type);
}
// Copy image to buffered image
Graphics g = bimage.createGraphics();
// Paint the image onto the buffered image
g.drawImage(image, 0, 0, null);
g.dispose();
return bimage;
}