java-遍历某文件夹下的文件

/**
 * 读取某个文件夹下的所有文件 返回文件路径集合
 * @param filepath 文件夹名
 * @return
 */

public static List<String>  readfile(String filepath) {
    List<String> list=new ArrayList<>();
    try {
        File file = new File(filepath);
        if (!file.isDirectory()) {
            list.add(file.getPath());
        } else if (file.isDirectory()) {
            String[] filelist = file.list();
            for (int i = 0; i < filelist.length; i++) {
                File readfile = new File(filepath + "\\" + filelist[i]);
                if (!readfile.isDirectory()) {
                    list.add(readfile.getPath());
                } else if (readfile.isDirectory()) {
                    readfile(filepath + "\\" + filelist[i]);
                }
            }
        }

    } catch (Exception e) {
        System.out.println("readfile()   Exception:" + e.getMessage());
    }
    return list;
}