Extjs struts2 上传后弹出下载框 解决方案

public String execute（）｛HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8");  String realpath = ServletActionContext.getServletContext().getRealPath( "/photo");  if (image != null) { File savefile = new File(new File(realpath), imageFileName); if(!savefile.getParentFile().exists())  savefile.getParentFile().mkdirs(); FileUtils.copyFile(image, savefile);  }             PrintWriter out = response.getWriter();                  success=true; out.println("{success:'success'}");return NONE;｝

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