Cannot call sendError() after the response has been committed

一个下载文件的方法，每次文件都能成功下载，但控制台总会报错：

    Cannot call sendError() after the response has been committed
    Could not find acceptable representation

虽然不妨碍下载功能的使用，但总报错让人心烦。
参考了这篇文章，原来是输出流关掉后还在return导致的。
去掉return，让方法返回void，错误消失。

标签：sendError,after,been,Cannot,报错,committed,call
来源： https://blog.csdn.net/hqqqqqqq555/article/details/99824728