mapbox雪碧图生成的坑

 1 public static InputStream mergeImage() throws IOException {
 2         List<File> files = new ArrayList<>();
 3         files = getFilesByPath(files, "xxx");
 4         //创建BufferedImage
 5         List<BufferedImage> buffImages = new ArrayList<>();
 6         for (File file : files) {
 7             buffImages.add(ImageIO.read(file));
 8         }
 9         int type = buffImages.get(0).getType();
10         int chunkWidth = buffImages.get(0).getWidth();
11         int chunkHeight = buffImages.get(0).getHeight();
12  
13         //设置拼接后图的大小和类型
14         int cols = 6;
15         int rows = files.size()/cols + 1;
16         BufferedImage finalImg = new BufferedImage(chunkWidth * cols, chunkHeight * rows, type);
17 
18         JSONObject json = new JSONObject();
19         //写入图像内容
20         for (int i = 0; i < rows; i++) {
21             for (int j = 0; j < cols; j++) {
22                 int num = i*6+j;
23                 if(num+1 <= files.size()) {
24                     finalImg.createGraphics().drawImage(buffImages.get(num), chunkWidth * j, chunkHeight * i, null);
25                     JSONObject obj = new JSONObject();
26                     obj.put("height", chunkHeight);
27                     obj.put("width", chunkWidth);
28                     obj.put("pixelRatio", type);
29                     obj.put("x", chunkWidth * j);
30                     obj.put("y", chunkHeight * i);
31                     String fileName = files.get(num).getName().split("\\.")[0].split("@")[0];
32                     json.put(fileName, obj);
33                 } 
34             }
35         }
36         //输出拼接后的图像
37         ImageIO.write(finalImg, "png", new File("D:\\sprite.png"));
38         @Cleanup InputStream is=(InputStream) ImageIO.createImageInputStream(finalImg);
39         finalImg.flush();
40         FileUtils.writeStringToFile(new File("D:\\sprite.json"), json.toString());
41         System.out.println("完成拼接！");
42         return is;
43     }