String-how to extract keywords from a string in java and store them in mysql

I read tens of thousands of lines of strings from the txt file and saved them to the string array. the contents in each array are roughly as follows: {& quot; gps & quot ;:{ & quot; type & quot;: & quot; gps & quot;, & quot; Lon & quot;: 116.34948495921601, & quot; status & quot;: & quot; available & quot ;, & quot; Lat & quot;: 39.9621098626166}, & quot; time & quot;: & quot; 2015-11-1119:24:57 mysqlstringjava

I read tens of thousands of lines of strings from the txt file and saved them to the string array. the contents of each array are roughly as follows:
{"Gps": {"type": "gps", "Lon": 116.34948495921601, "status": "available", "Lat": 39.9621098626166}, "time ": "19:24:57 + 0800", "wifi": [{"ssid": "TP-LINK_514", "mac": "88: 25: 93: 69: 36: d5 ", "dbm":-43}, {"ssid": "LiebaoFree150", "mac": "5e: 4b: d6: d5: b1: 31", "dbm ": -56}, {"ssid": "TP-LINK_5G_514", "mac": "88: 25: 93: 69: 36: d4", "dbm":-51 }, {"ssid": "10-331", "mac": "1c: 7e: e5: 55: 22: b6", "dbm":-82 }, {"ssid": "1% ts", "mac": "fc: d7: 33: 7f: 51: d8", "dbm":-77 }, {"ssid": "BUPT-dot1x", "mac": "d8: c7: c8: 02: a1: 19", "dbm":-85}, {"ssid ": "516NB", "mac": "fc: d7: 33: 7f: e9: dc", "dbm":-70}, {"ssid": "Kevin ", "mac": "f4: b7: e2: b7: 0e: 25", "dbm":-86 },{ "ssid": "ChinaNet", "mac ": "2e: 4b: d6: AB: 5e: 2b", "dbm":-62 },{ "ssid": "517", "mac": "fc: d7: 33: 7f: 50: 30 "," dbm ":-79}, {" ssid ":" OP "," mac ":" 36: de: 1a: 71: 82: 0c "," dbm ":-78}, {" ssid ":" BUPT-1 "," mac ":" d8: c7: c8: 02: a1: 18 ", "dbm":-89}, {"ssid": "360WiFi-414", "mac": "8c: a9: 82: 00: 8d: 03", "dbm ": -71}, {"ssid": "TP-LINK 414", "mac": "80: 89: 17: fd: 8e: 82", "dbm":-82 }, {"ssid": "TP-LINK_L", "mac": "fc: d7: 33: 80: 08: ea", "dbm":-90}, {"ssid ": "211_Class8_SICE_Building5", "mac": "ec: 88: 8f: 43: 33: d4", "dbm":-91 },{ "ssid": "TP-LINK_1303 ", "mac": "fc: d7: 33: 80: 09: 6c", "dbm":-87}], "cell": [{"connected": true, "mnc": "46001", "cell_type": "gsm_uni", "dbm":-79, "m": "one", "networktype": "UMTS ", "cid": 7089899, "lac": 41052}]}

What method should I use to extract the content in each {} and store the content in mysql according to the ssid, mac, and dbm respectively?
In addition, the number of {} in each string is not fixed.
Thank you.