baidu_29258265的博客

在指定时间区间内 根据某字段分组统计数据    @RequestMapping(value = "getUserMemStatistics", method = RequestMethod.POST)    public void getUserMemStatistics(HttpServletRequest request, HttpServletResponse response) {...

// String to Long        SimpleDateFormat format = new SimpleDateFormat(pattern);        Long time = 0L;        try {            time = format.parse(str).getTime();        } catch (ParseException...

Phoenix的插入语句是Upsert，Update和Insert的组合语义。如果数据表中没有这条记录那么插入这条记录，如果有则更新。<==>Oracle的Merge Into<==>MySQL的Insert …on duplicate keydataTable自带的导出，缺点只能导出本页。$('#example').DataTable( {        ...

MongoCursor<Document> cursor = null;List<UserAcqInfo> list = new ArrayList<UserAcqInfo>();MongoCollection<Document> coll = getCollection(dbName+"_"+100000100, collName_acq);...