如何解析json文件中另一个对象内的对象？ 以下是json响应，我想解析火车名称，运行天数和运行时间
{
"total": 14,
"debit": 1,
"response_code": 200,
"trains": [{
"name": "KUMBHA EXPRESS",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "12369",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:03",
"dest_arrival_time": "03:58",
"src_departure_time": "01:55"
}, {
"name": "VARUNA EXPRESS",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "24227",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:18",
"dest_arrival_time": "07:03",
"src_departure_time": "04:45"
}, {
"name": "PPTA UDZ HUMSAFAR EXP",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "N",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "N",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "19670",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:50",
"dest_arrival_time": "08:00",
"src_departure_time": "05:10"
}, {
"name": "BSB-SLN PASS.",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "54263",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "03:40",
"dest_arrival_time": "10:40",
"src_departure_time": "07:00"
}, {
"name": "AMRITSAR EXPRESS",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "13049",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "03:15",
"dest_arrival_time": "11:55",
"src_departure_time": "08:40"
}, {
"name": "FARAKKA EXPRESS",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "13413",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:55",
"dest_arrival_time": "14:05",
"src_departure_time": "11:10"
}, {
"name": "BSB-JAT EXP.",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "12237",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:10",
"dest_arrival_time": "14:50",
"src_departure_time": "12:40"
}, {
"name": "SHRAMJEEVI EXPRESS",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "12391",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "01:58",
"dest_arrival_time": "17:10",
"src_departure_time": "15:12"
}, {
"name": "INDORE EXPRESS",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "N",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "N",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "19314",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:15",
"dest_arrival_time": "18:15",
"src_departure_time": "16:00"
}, {
"name": "BSB-SLN PASS",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "Y",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "54265",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "03:55",
"dest_arrival_time": "20:10",
"src_departure_time": "16:15"
}, {
"name": "PNBE-KOTA EXPRESS",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "N",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "Y",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "N",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "13239",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:20",
"dest_arrival_time": "18:55",
"src_departure_time": "16:35"
}, {
"name": "MARUDHAR EXPRES",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "Y",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "Y",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "14863",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:15",
"dest_arrival_time": "20:30",
"src_departure_time": "18:15"
}, {
"name": "SDAH DLI EXP",
"days": [{
"runs": "Y",
"code": "MON"
}, {
"runs": "N",
"code": "TUE"
}, {
"runs": "N",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "N",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "13119",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:13",
"dest_arrival_time": "00:08",
"src_departure_time": "21:55"
}, {
"name": "EKATMATA EXRESS",
"days": [{
"runs": "N",
"code": "MON"
}, {
"runs": "N",
"code": "TUE"
}, {
"runs": "Y",
"code": "WED"
}, {
"runs": "N",
"code": "THU"
}, {
"runs": "Y",
"code": "FRI"
}, {
"runs": "N",
"code": "SAT"
}, {
"runs": "N",
"code": "SUN"
}],
"classes": [{
"name": "SECOND AC",
"code": "2A"
}, {
"name": "AC CHAIR CAR",
"code": "CC"
}, {
"name": "FIRST CLASS",
"code": "FC"
}, {
"name": "SLEEPER CLASS",
"code": "SL"
}, {
"name": "SECOND SEATING",
"code": "2S"
}, {
"name": "THIRD AC",
"code": "3A"
}, {
"name": "FIRST AC",
"code": "1A"
}, {
"name": "3rd AC ECONOMY",
"code": "3E"
}],
"number": "14261",
"to_station": {
"name": "SULTANPUR",
"code": "SLN",
"lng": 82.0,
"lat": 26.25
},
"from_station": {
"name": "VARANASI JN",
"code": "BSB",
"lng": 83.0076292,
"lat": 25.3356491
},
"travel_time": "02:10",
"dest_arrival_time": "01:55",
"src_departure_time": "23:45"
}]
}