public static String download(Context context,String docUrl)throws Exception{ /***加载正文***/ //获取存储卡路径、构成保存文件的目标路径 String dirName = ""; //SD卡具有读写权限、指定附件存储路径为SD卡上指定的文件夹 dirName = Environment.getExternalStorageDirectory()+"/Signature/"; File f = new File(dirName); if</