模板數據替換 {name} = 小李

import org.joda.time.DateTime;  

public String convertTemplate2Content(String id){       
        User user = userService.getUserById(id);//演示代碼此行能夠忽略
        String content = "{name}在{date}提交了一份代碼，裏面第{line}有不少bug";
        // 正則表達式 尋找 大括號內的 數據
        Pattern pattern = Pattern.compile("(?<=\\{)(.+?)(?=\\})");
        Matcher matcher = pattern.matcher(content);
        Map<String, Object> map = Bean2Map.beanToMap(user);
        // 遍歷全文
        while (matcher.find()) {
            String field = matcher.group();
            // 用來替換 {字段} 的正則
            String replace = "\\{" + field + "\\}";
            Object object = map.get(field);
            if (object == null) {
                return   "數據模板字段輸入錯誤";
            }
            // 時間類型格式化後轉字符串
            if (object instanceof java.util.Date) {
                Date date = (java.util.Date) object;
                object = new DateTime(date).toString("yyyy-MM-dd HH:mm:ss");
            }
            String replaceAll = content.replaceAll(replace, object.toString());
            content = replaceAll;
        }
       return content;
}

/**
     * javaBean 轉 Map
     * 
     * @param object
     *            須要轉換的javabean
     * @return 轉換結果map
     * @throws Exception
     */
    public static Map<String, Object> beanToMap(Object object) throws Exception {
        Map<String, Object> map = new HashMap<String, Object>();
        Class<? extends Object>  cls = object.getClass();
        Field[] fields = cls.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            map.put(field.getName(), field.get(object));
        }
        return map;
    }