struts2 文件下载

1 在要处理的action类里加入

public InputStream getInputStream() throws FileNotFoundException {
		  return new FileInputStream(fileName);//绝对路径
	}

2 xml配置

 <result type="stream" name="download">
				<param name="contentType">application/octet-stream</param>
				<param name="inputName">inputStream</param>
				<param name="contentDisposition">attachment;filename="${fileName}"</param>
				<param name="bufferSize">4096</param>
            </result>