struts2 下载不弹出下载对话框

??如下配置可以：

<action name="dowloadfile"? type="stream">
???? <param name="contentType">application/octet-stream</param>
???? <param name="inputName">targetFile</param>
???? <param name="contentDisposition">attachment;filename=${courseFile.filename}</param>
???? <param name="bufferSize">1024</param>
???</result>
??</action>

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原来的不可以

??<action name="dowloadfile"? type="stream">
???? <param name="contentType">application/octet-stream</param>
???? <param name="inputName">targetFile</param>
???? <param name="contentDisposition">filename=${courseFile.filename}</param>
???? <param name="bufferSize">1024</param>
???</result>
??</action>

?

原因 contentDisposition，少了attachment 参数

?

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