struts2文件下載類型的設置

<result name="success" type="stream">
  <param name="contentType">image/jpeg</param>
  <param name="inputName">imageStream</param>
  <param name="contentDisposition">attachment;filename="document.pdf"</param><!--此處文件下載名爲document.pdf-->
  <param name="bufferSize">1024</param>
</result>