code: public static File writeFromStream(InputStream in, String fullFilePath) throws IORuntimeException {
  		return writeFromStream(in, touch(fullFilePath));
  	}
docs: 将流的内容写入文件<br>
  
  @param in 输入流
  @param fullFilePath 文件绝对路径
  @return 目标文件
  @throws IORuntimeException IO异常