扫描文件目录并树形展示，利用jQueryTreeTable实现，怎么将同目录文件夹升序，文件降序呢？正文贴代码

以下是代码，如果太长不想看，可以看图 😢

public static Map traverseDirectory(String DirPath, int level, String rootDir, Map map) {

// 根据目录构造file对象
File dirFile = new File(DirPath);
// 列出该目录下的文件和目录
String[] fileArr = dirFile.list();

// 目录非空
if (fileArr != null && fileArr.length > 0) {
  List<UnFileTab> fileList = (List<UnFileTab>) map.get(level);
  if (fileList == null) {
    fileList = new ArrayList<UnFileTab>();
  }
  // 遍历保存该目录下的文件和目录至Map中，以level为key，所有文件（目录）封装为UNFileTab对象存入list作为value
  for (String filePath : fileArr) {
    // Map ChildFileMap = new HashMap();// 每层一个
    File file = new File(DirPath + File.separator + filePath);
    UnFileTab unfile = null;
    unfile = assembleFile(file, level, rootDir);
    fileList.add(unfile);
    // ChildFileMap.put(rootDir, fileList);// 储存方式 父节点文件名为Key 值为父节点下的list
    map.put(rootDir, fileList);
    if (file.isDirectory()) {
      int nowLevel = level + 1;
      traverseDirectory(DirPath + File.separator + filePath, level + 1, filePath, map);
      map.put("MAXLEVEL", nowLevel);
    }
  }

}
return map;

}

    public static StringBuilder parseDirectory(List<UnFileTab> list,
  Map<String, List<UnFileTab>> map, StringBuilder sb, String rootDir, String level) {
if (list != null && list.size() > 0) {
  for (int i = 0; i < list.size(); i++) {
    UnFileTab unf = list.get(i);
    if ((i & 1) != 0) {// 奇数
      sb.append("<tr class=\"even branch ui-droppable\" data-tt-id=\""
          + assembleVersion(level, i) + "\"  data-tt-parent-id=\"" + level + "\">");// 第一次 根目录
    } else {
      sb.append("<tr class=\"odd branch ui-droppable\" data-tt-id=\""
          + assembleVersion(level, i) + "\"  data-tt-parent-id=\"" + level + "\">");
    }
    sb.append("<td align=\"center\">  <span " + getTypeClass(unf.getType()) + " >"
        + unf.getFilename() + "</span></td>");
    sb.append("<td align=\"center\" class=\"indenter\">" + unf.getParent() + "</td>");
    sb.append("<td align=\"center\" class=\"indenter\">" + getType(unf.getType()) + "</td>");
    sb.append("<td align=\"center\" class=\"indenter\"> 修改  删除  新增</td>");
    sb.append("<td style=\"display:none\">" + unf.getPath() + "</td>");
    sb.append("</tr> \n");
    List<UnFileTab> childList = map.get(unf.getFilename());
    if (childList != null && childList.size() > 0) {
      parseDirectory(childList, map, sb, unf.getFilename(), assembleVersion(level, i));
    }
  }
}

return sb;

}

感觉用 QQ 截图发出来也是不错的啊