list中存放的是imei 865209031060925 recivedTime 2017/10/16 14:33:52imei 865209031060925 recivedTIme 2017/10/12 16:57:27这种数据,imei后面紧跟对应时间,我想将imei相同的时间放到一起 如 imei 865209031060925 2017/10/16 14:33:52 2017/10/12 16:57:27,该怎做?
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