Java web 文件下载

public void toWord(){
	//	window.location.href = templateRoot+'mis/orgAddress/orgaddress_expExcel.action';
	OuterwarnManage outerwarnManageObj = outerwarnManageService.getById(outerwarnManage.getId());
	getResponse().setContentType("application/vnd.ms-word");
	getResponse().setHeader("Content-Disposition", (new StringBuilder("attachment; filename=")).append("warn_file.doc").toString());
	String fileUrl = ServletActionContext.getServletContext().getRealPath("")+"\\monitor\\monitormanage\\word\\doc\\warnTemp.xml";
//	String fileUrl = 	"E:\\develop\\workspace\\system_monitor\\src\\main\\webapp\\monitor\\monitormanage\\word\\doc\\warnTemp.xml";
	File file = new File(fileUrl);
	if(file.exists()){
		FileInputStream is = null;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		OutputStream os = null;
		try {
			is = new FileInputStream(file);
			os = this.getResponse().getOutputStream();
			
			byte[] buffers = new byte[is.available()];
			int count = 0;
			while((count = is.read(buffers))>0)
			{
				bos.write(buffers, 0, count);
			}

			
			
			String docXmlString = new String(bos.toByteArray(),"UTF-8");
			docXmlString = docXmlString.replace("WarnName", WarnName);
			docXmlString = docXmlString.replace("warnComment",warnComment );
			docXmlString = docXmlString.replace("warnCoverage",warnCoverage);
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
			
			
			docXmlString = docXmlString.replace("warnSource", warnSource);
			docXmlString = docXmlString.replace("specialWarnSuggest", specialWarnSuggest);
			docXmlString = docXmlString.replace("=img=", "");
			os.write(docXmlString.getBytes("UTF-8"));
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		finally
		{
			if(is != null)
				try {
					is.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			if(os != null)
				try {
					os.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			if(bos != null)
				try {
					bos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}
}