//首先,拼接你的文件路径 String Path = Constants.upload_url + expertDoctor.getDoctorId() +".png"; //然后,判断文件是否存在 URL url = new URL(Path); HttpURLConnection urlcon = (HttpURLConnection) url.openConnection(); String message = urlcon.getHeaderField(0); if (StringUtils.hasText(message) && message.startsWith("HTTP/1.1 404")) { //不存在 }else{ //存在 }