从服务器上载文件到客户端

从服务器下载文件到客户端
页面连接：

<a href="xxx_download.action?url=<s:property value="url" />&name=<s:property value="name" />">

后台代码：

//下载文件
public void download(){
        String filePath = "";
        String fileName = "";
		try {
			// 读取文件并且设置相关参数
			if (StringUtils.isNotBlank(url)) {
				filePath = request.getSession().getServletContext()
						.getRealPath(url);
			}

			if (StringUtils.isNotBlank(name)) {
				fileName = new String(name.getBytes("gbk"),
						"iso8859-1");
			}

			File file = new File(filePath);

			byte[] buf = new byte[1*1024];
			int len = 0;
			BufferedInputStream br = null;
			OutputStream ut = null;
			response.reset();// 必须加，不然保存不了临时文件
			response.setContentType("application/x-msdownload");
			response.setHeader("Content-Disposition", "attachment; filename="
					+ fileName);

			br = new BufferedInputStream(new FileInputStream(file));
			ut = response.getOutputStream();
			while ((len = br.read(buf)) != -1) {
				ut.write(buf, 0, len);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}