IconGenerator.java 文件源码

private Map<String, List<Image>> getImageMap() throws IOException {

    ServletContextResource imagesRes 
    = new ServletContextResource(getServletContext(), this.imageDirectory);

    File imagesFile = imagesRes.getFile();

    final Map<String, List<Image>> images = new TreeMap<String, List<Image>>();
    File[] imageFiles = imagesFile.listFiles(new FilenameFilter() {

        public boolean accept(File dir, String name) {

            FileSystemResource file = new FileSystemResource(new File(dir, name));

            for (String ext : exts) {
                if (name.toLowerCase().endsWith(ext)) { 
                    try {
                        BufferedImage img = ImageIO.read(file.getFile());

                        String key = name.substring(0, name.length() - ext.length());
                        key = name.substring(0, key.length() - 2);

                        List<Image> imageList = images.get(key);
                        if (imageList == null) {
                            imageList = new ArrayList<Image>(1);
                            images.put(key, imageList);
                        }
                        imageList.add(img);
                        return true;
                    } catch (IOException e) { 
                        return false;
                    }
                }
            }
            return false;

        }});


    return images;

}