private void processThumbnail(JSONObject jsonObject) { // 缩略图路径 String thumbnailPath = jsonObject.get("thumbnail").toString(); if (!"".equals(thumbnailPath)) { // 先从字符串中找到文件夹uploadFile的位置,再加上uploadFile的长度10,即可截取到下属文件路径 int position = thumbnailPath.lastIndexOf("uploadFile"); String relativePath = thumbnailPath.substring(position + 11); jsonObject.set("thumbnail", relativePath); } }