response.setHeader

点击会提供对话框选择另存为:
response.setHeader( “Content-Disposition “, “attachment;filename= “+filename);

通过IE浏览器直接选择相关应用程序插件打开:
response.setHeader( “Content-Disposition “, “inline;filename= “+fliename)

下载前询问(是打开文件还是保存到计算机)
response.setHeader( “Content-Disposition “, “filename= “+filename);
 

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转载自www.cnblogs.com/guoxinying/p/10830370.html