问题描述

我正在尝试播放视频文件，因为我的操作 contentType 设置为

I am trying to play video file, for my action contentType is set to

应用程序/八位字节流

现在如果我将其更改为音频/mpeg，则用户无法下载其他类型的文件.我想简单地知道我们可以设置多个内容类型，如果可以的话?如果不可能，在用户可以上传和下载任何类型的文件的情况下我应该怎么做.

now if i change it to audio/mpeg, then user cant download other types of files. I would like to simply know can we set multiple content type if so how? and if its not possible what should i do in a situation where user can upload and download anytype of file.

推荐答案

当然可以.

您必须输出 Stream Result 类型 来自您的 Action，并指定 parametric contentType，例如:

Struts.xml

<result name="success" type="stream">
  <param name="contentType">${yourContentType}</param>
  <param name="inputName">inputStream</param>
  <param name="contentDisposition">attachment;filename="${yourFileName}"</param>
  <param name="bufferSize">1024</param>
</result>

动作

@Getter @Setter private InputStream inputStream;
@Getter private String yourContentType;
@Getter private String yourFileName;

public String execute() throws Exception {

   yourContentType = "audio/mpeg";
   yourFileName = "yourStuff.mp3";
   byte[] yourContent = loadTheContentInSomeWay();

   setInputStream(new ByteArrayInputStream(yourContent));        

   return SUCCESS;
}

您可以参数化 contentDisposition 部分以指定何时必须将文件打开为 attachment(要求下载)或 inline(在浏览器)根据您的需要.

You can parameterize the contentDisposition part to specify when a file must be opened as attachment (ask for download) or inline (open in browser) according to your needs.