网页转word

1. 先写一个word模板，将变量用${} 样式填充在将要显示的值处
2. List类型的数据，需要指定序号进行循环
3. word模板另存为xml文件   注意：有时候会在${}之间多出来样式，需删掉
4. controller的方法中new一个map，将要填充在word中的变量都放到map里，记得指定输出流的编码（utf-8），否则可能报内容有错误，不能读取word文档。

   	// 如果数据库中的数据为null，转换为0
   	public String toString (Object obj){
   		return (obj == null) ? "0" : obj.toString();
   	}
   	@RequestMapping(value = "/download")
   	public void export(HttpServletResponse response, Integer id) {
   		if (null != id) {
   			PaTrainWeekly paTrainWeekly = this.paTrainWeeklyService.findById(id);
   			List<PaTrainNewReceiveItems> receiveItems = this.paTrainNewReceiveItemsService.findByWeeklyId(id);
   			
   			Map<String, String> data = new HashMap<>();
   			data.put("year", toString(paTrainWeekly.getYear()));
   			data.put("month", toString(paTrainWeekly.getMonth()));
   			if (ObjectUtil.isNotBlank(receiveItems)) {
   				// 循环集合里的数据
   				for(int i = 0; i < receiveItems.size(); i++){
   					PaTrainNewReceiveItems tr = receiveItems.get(i);
   					if(tr != null){
   						String trainNum = toString(tr.getTrainNum());
   						String company = tr.getCompany();
   						String receiveNum = new SimpleDateFormat("yyyy-MM-dd").format(tr.getReceiveNum());
   						
   						// 第一列增加一个序号
   						data.put("num_"+(i+1), toString(i+1));
   						data.put("receiveItems_"+ (i+1) +"_trainNum", trainNum);
   						data.put("receiveItems_"+ (i+1) +"_company", company);
   					}
   				}
   				// word里暂定十条数据，因为不确定集合里有多少条数据，少于10条的用null代替。
   				if(10>receiveItems.size()){
   					for(int i = receiveItems.size(); 10> i; i++){
   						data.put("num_"+(i+1), "");
   						data.put("receiveItems_"+ (i+1) +"_trainNum", "");
   						data.put("receiveItems_"+ (i+1) +"_company","");
   					}
   				}
   			}
   			
   			String wordData = FileUtils.wordData(data, "trainWeekly.xml");
   			response.setCharacterEncoding("utf-8"); 
   			response.setContentType("application/msword");  
   			// 设置浏览器以下载的方式处理该文件名  
   			String fileName =  DateUtils.formatDate(new Date())+".doc";  
   			response.setHeader("Content-Disposition", "attachment;filename=".concat(fileName)); 
   			try {
   				OutputStream out = response.getOutputStream();
   				out.write(wordData.getBytes("UTF-8"));
   				out.flush();
   			} catch (IOException e) {
   				e.printStackTrace();
   			}
   		}
   	}

public static String wordData(Map<String, String> data, String template) {
	String tmp = readTemplate(template);
	logger.debug("template {}", tmp);
	Set<Entry<String, String>> set = data.entrySet();
	for (Entry<String, String> entry : set) {
		String k = entry.getKey();
		String v = entry.getValue();
		if (v == null) {
			v = "";
		}
		k = "${" + k + "}";
		tmp = tmp.replace(k, v);
	}

	return tmp;
}

public static String readTemplate(String name) {
	StringBuffer buffer = new StringBuffer();
	try {
		URL url = FileUtils.class.getResource("/files/" + name);

		BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(url.getPath()), "UTF-8"));
		String line = null;
		while ((line = br.readLine()) != null) {
			buffer.append(line);
		}
		br.close();

	} catch (FileNotFoundException e) {
		e.printStackTrace();
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	return buffer.toString();
}

/**
 * 将Date格式化成符合默认日期格式的字符串
 * 
 * @param date
 * @return 返回样例:2012-03-29
 */
public static String formatDate(Date date) {
	SimpleDateFormat formatTool = new SimpleDateFormat();
	formatTool.applyPattern(DAY_PATTERN);
	return formatTool.format(date);
}