MongoDB自动删除过期数据–TTL索引

db.log_events.createIndex( { “expireTime”: 1 }, —字段名称
{ expireAfterSeconds: 0 } ) —过期时间（单位秒）

db.log_events.insert( {
“expireTime”: new Date(‘Jan 22, 2016 23:00:00’), —此文档将在2016-1-22的23点自动删除
“logEvent”: 2,
“logMessage”: “Success!”} )

JSONObject fpvJObj = fpvsJarr.getJSONObject(i);
fpvJObj.put(“recordId”, businessControlId);
DBObject dbObject = (DBObject) JSON.parse(fpvJObj.toString());
dbObject.put(“Date”, new Date());
Calendar nowTime = Calendar.getInstance();
nowTime.add(Calendar.MINUTE, 15);
dbObject.put(“expireTime”, nowTime.getTime());
listObj.add(dbObject);
}