如图所示，调用接口获取了一组json格式的数据，其中creationTimestamp表示的是时间，请问前端如何将这一大段数据转换成2020-09-23 10:25:21这种dataTime格式的数据呢
"creationTimestamp": {
"iMillis": 1603337531000,
"iChronology": {
"iBase": {
"iBase": {
"iBase": {
"iMinDaysInFirstWeek": 4
}
},
"iParam": {
"iZone": {
"iTransitions": [
-9223372036854775808,
-2177481943000,
-933667200000,
-922093200000,
-908870400000,
-888829200000,
-881049600000,
-767869200000,
-745833600000,
-733827600000,
-716889600000,
-699613200000,
-683884800000,
-670669200000,
-652348800000,
-650019600000,
515527200000,
527014800000,
545162400000,
558464400000,
577216800000,
589914000000,
608666400000,
621968400000,
640116000000,
653418000000,
671565600000,
684867600000
],
"iWallOffsets": [
29143000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000,
32400000,
28800000
],
"iStandardOffsets": [
29143000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000,
28800000
],
"iNameKeys": [
"LMT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST",
"CDT",
"CST"
],
"iID": "Asia/Shanghai"
},
"iID": "Asia/Shanghai"
}
}
}
},
