我有这样的Json字符串，函数返回List：
[
{
"name": "DEFAULT",
"effectiveDate": "Apr 19, 2018 3:35:31 PM",
"currencies": [
"IDR"
],
"products": [
{
"type": "BASE",
"name": "PostPaid",
"plans": [
{
"name": "postpaid-monthly-fix",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 300000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial1",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 1
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 250000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial7",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 7
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 350000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
}
],
"included": [],
"available": []
},
{
"type": "BASE",
"name": "PrePaid",
"plans": [
{
"name": "prepaid-signature-item",
"billingPeriod": "NO_BILLING_PERIOD",
"phases": [
{
"type": "EVERGREEN",
"prices": [],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": [
{
"billingPeriod": "DAILY",
"tiers": [
{
"blocks": [
{
"unit": "item",
"size": "1.0",
"max": "5.0",
"prices": [
{
"currency": "IDR",
"value": 250000
}
]
}
],
"limits": [],
"fixedPrice": [],
"recurringPrice": []
}
]
}
]
}
]
}
],
"included": [],
"available": []
}
],
"priceLists": [
{
"name": "DEFAULT",
"plans": [
"postpaid-monthly-fix",
"postpaid-monthly-trial1",
"postpaid-monthly-trial7",
"prepaid-signature-item"
]
}
]
},
{
"name": "DEFAULT",
"effectiveDate": "Apr 20, 2018 3:35:31 PM",
"currencies": [
"IDR"
],
"products": [
{
"type": "BASE",
"name": "PostPaid",
"plans": [
{
"name": "postpaid-monthly-fix",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 300000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial1",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 1
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 250000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial7",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 7
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 350000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
}
],
"included": [],
"available": []
},
{
"type": "BASE",
"name": "PrePaid",
"plans": [
{
"name": "prepaid-signature-item",
"billingPeriod": "NO_BILLING_PERIOD",
"phases": [
{
"type": "EVERGREEN",
"prices": [],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": [
{
"billingPeriod": "NO_BILLING_PERIOD",
"tiers": [
{
"blocks": [
{
"unit": "item",
"size": "1.0",
"max": "5.0",
"prices": [
{
"currency": "IDR",
"value": 250000
}
]
}
],
"limits": [],
"fixedPrice": [],
"recurringPrice": []
}
]
}
]
}
]
}
],
"included": [],
"available": []
}
],
"priceLists": [
{
"name": "DEFAULT",
"plans": [
"postpaid-monthly-fix",
"postpaid-monthly-trial1",
"postpaid-monthly-trial7",
"prepaid-signature-item"
]
}
]
},
{
"name": "DEFAULT",
"effectiveDate": "Apr 21, 2018 3:35:31 PM",
"currencies": [
"IDR"
],
"products": [
{
"type": "BASE",
"name": "PostPaid",
"plans": [
{
"name": "postpaid-monthly-fix",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 300000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial1",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 1
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 250000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial7",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 7
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 350000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
}
],
"included": [],
"available": []
},
{
"type": "BASE",
"name": "PrePaid",
"plans": [
{
"name": "prepaid-signature-item",
"billingPeriod": "NO_BILLING_PERIOD",
"phases": [
{
"type": "EVERGREEN",
"prices": [],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": [
{
"billingPeriod": "DAILY",
"tiers": [
{
"blocks": [
{
"unit": "item",
"size": "1.0",
"max": "5.0",
"prices": [
{
"currency": "IDR",
"value": 250000
}
]
}
],
"limits": [],
"fixedPrice": [],
"recurringPrice": []
}
]
}
]
}
]
}
],
"included": [],
"available": []
}
],
"priceLists": [
{
"name": "DEFAULT",
"plans": [
"postpaid-monthly-fix",
"postpaid-monthly-trial1",
"postpaid-monthly-trial7",
"prepaid-signature-item"
]
}
]
},
{
"name": "DEFAULT",
"effectiveDate": "Apr 21, 2018 3:38:31 PM",
"currencies": [
"IDR"
],
"products": [
{
"type": "BASE",
"name": "PostPaid",
"plans": [
{
"name": "postpaid-monthly-fix",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 300000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial1",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 1
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 250000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
},
{
"name": "postpaid-monthly-trial7",
"billingPeriod": "MONTHLY",
"phases": [
{
"type": "TRIAL",
"prices": [],
"fixedPrices": [
{
"currency": "IDR",
"value": 0
}
],
"duration": {
"unit": "DAYS",
"number": 7
},
"usages": []
},
{
"type": "EVERGREEN",
"prices": [
{
"currency": "IDR",
"value": 350000
}
],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": []
}
]
}
],
"included": [],
"available": []
},
{
"type": "BASE",
"name": "PrePaid",
"plans": [
{
"name": "prepaid-signature-item",
"billingPeriod": "NO_BILLING_PERIOD",
"phases": [
{
"type": "EVERGREEN",
"prices": [],
"fixedPrices": [],
"duration": {
"unit": "UNLIMITED",
"number": -1
},
"usages": [
{
"billingPeriod": "DAILY",
"tiers": [
{
"blocks": [
{
"unit": "item",
"size": "1.0",
"max": "5.0",
"prices": [
{
"currency": "IDR",
"value": 250000
}
]
}
],
"limits": [],
"fixedPrice": [],
"recurringPrice": []
}
]
}
]
}
]
}
],
"included": [],
"available": []
}
],
"priceLists": [
{
"name": "DEFAULT",
"plans": [
"postpaid-monthly-fix",
"postpaid-monthly-trial1",
"postpaid-monthly-trial7",
"prepaid-signature-item"
]
}
]
}
]
其中json通过此代码构建：
String json = new Gson().toJson(price);
然后我想获得单个值，例如：
"plans":["postpaid-monthly-fix","postpaid-monthly-trial1","postpaid-monthly-trial7","prepaid-signature-item"]
我尝试使用json.get（＆＃34;计划＆＃34;）但是获得语法错误，任何线索？
答案 0 :(得分：0)
尝试以下方法：
String s = "[{\"name\":\"DEFAULT\",\"effectiveDate\":\"Apr 19, 2018 3:35:31 PM\",\"currencies\":[\"IDR\"],\"products\":[{\"type\":\"BASE\",\"name\":\"PostPaid\",\"plans\":[{\"name\":\"postpaid-monthly-fix\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":300000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial1\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":1},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial7\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":7},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":350000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]}],\"included\":[],\"available\":[]},{\"type\":\"BASE\",\"name\":\"PrePaid\",\"plans\":[{\"name\":\"prepaid-signature-item\",\"billingPeriod\":\"NO_BILLING_PERIOD\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[{\"billingPeriod\":\"DAILY\",\"tiers\":[{\"blocks\":[{\"unit\":\"item\",\"size\":\"1.0\",\"max\":\"5.0\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}]}],\"limits\":[],\"fixedPrice\":[],\"recurringPrice\":[]}]}]}]}],\"included\":[],\"available\":[]}],\"priceLists\":[{\"name\":\"DEFAULT\",\"plans\":[\"postpaid-monthly-fix\",\"postpaid-monthly-trial1\",\"postpaid-monthly-trial7\",\"prepaid-signature-item\"]}]},{\"name\":\"DEFAULT\",\"effectiveDate\":\"Apr 20, 2018 3:35:31 PM\",\"currencies\":[\"IDR\"],\"products\":[{\"type\":\"BASE\",\"name\":\"PostPaid\",\"plans\":[{\"name\":\"postpaid-monthly-fix\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":300000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial1\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":1},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial7\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":7},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":350000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]}],\"included\":[],\"available\":[]},{\"type\":\"BASE\",\"name\":\"PrePaid\",\"plans\":[{\"name\":\"prepaid-signature-item\",\"billingPeriod\":\"NO_BILLING_PERIOD\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[{\"billingPeriod\":\"NO_BILLING_PERIOD\",\"tiers\":[{\"blocks\":[{\"unit\":\"item\",\"size\":\"1.0\",\"max\":\"5.0\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}]}],\"limits\":[],\"fixedPrice\":[],\"recurringPrice\":[]}]}]}]}],\"included\":[],\"available\":[]}],\"priceLists\":[{\"name\":\"DEFAULT\",\"plans\":[\"postpaid-monthly-fix\",\"postpaid-monthly-trial1\",\"postpaid-monthly-trial7\",\"prepaid-signature-item\"]}]},{\"name\":\"DEFAULT\",\"effectiveDate\":\"Apr 21, 2018 3:35:31 PM\",\"currencies\":[\"IDR\"],\"products\":[{\"type\":\"BASE\",\"name\":\"PostPaid\",\"plans\":[{\"name\":\"postpaid-monthly-fix\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":300000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial1\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":1},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial7\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":7},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":350000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]}],\"included\":[],\"available\":[]},{\"type\":\"BASE\",\"name\":\"PrePaid\",\"plans\":[{\"name\":\"prepaid-signature-item\",\"billingPeriod\":\"NO_BILLING_PERIOD\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[{\"billingPeriod\":\"DAILY\",\"tiers\":[{\"blocks\":[{\"unit\":\"item\",\"size\":\"1.0\",\"max\":\"5.0\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}]}],\"limits\":[],\"fixedPrice\":[],\"recurringPrice\":[]}]}]}]}],\"included\":[],\"available\":[]}],\"priceLists\":[{\"name\":\"DEFAULT\",\"plans\":[\"postpaid-monthly-fix\",\"postpaid-monthly-trial1\",\"postpaid-monthly-trial7\",\"prepaid-signature-item\"]}]},{\"name\":\"DEFAULT\",\"effectiveDate\":\"Apr 21, 2018 3:38:31 PM\",\"currencies\":[\"IDR\"],\"products\":[{\"type\":\"BASE\",\"name\":\"PostPaid\",\"plans\":[{\"name\":\"postpaid-monthly-fix\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":300000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial1\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":1},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]},{\"name\":\"postpaid-monthly-trial7\",\"billingPeriod\":\"MONTHLY\",\"phases\":[{\"type\":\"TRIAL\",\"prices\":[],\"fixedPrices\":[{\"currency\":\"IDR\",\"value\":0}],\"duration\":{\"unit\":\"DAYS\",\"number\":7},\"usages\":[]},{\"type\":\"EVERGREEN\",\"prices\":[{\"currency\":\"IDR\",\"value\":350000}],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[]}]}],\"included\":[],\"available\":[]},{\"type\":\"BASE\",\"name\":\"PrePaid\",\"plans\":[{\"name\":\"prepaid-signature-item\",\"billingPeriod\":\"NO_BILLING_PERIOD\",\"phases\":[{\"type\":\"EVERGREEN\",\"prices\":[],\"fixedPrices\":[],\"duration\":{\"unit\":\"UNLIMITED\",\"number\":-1},\"usages\":[{\"billingPeriod\":\"DAILY\",\"tiers\":[{\"blocks\":[{\"unit\":\"item\",\"size\":\"1.0\",\"max\":\"5.0\",\"prices\":[{\"currency\":\"IDR\",\"value\":250000}]}],\"limits\":[],\"fixedPrice\":[],\"recurringPrice\":[]}]}]}]}],\"included\":[],\"available\":[]}],\"priceLists\":[{\"name\":\"DEFAULT\",\"plans\":[\"postpaid-monthly-fix\",\"postpaid-monthly-trial1\",\"postpaid-monthly-trial7\",\"prepaid-signature-item\"]}]}]\n";
JSONArray jsonArray = (JSONArray) JSONValue.parseWithException(s);
List plans = (List)((Map)((List)((Map)jsonArray.get(0)).get("priceLists")).get(0)).get("plans");
System.out.println(plans);
System.out.println(plans.get(0));
System.out.println(plans.get(1));
System.out.println(plans.get(2));
System.out.println(plans.get(3));
输出：
["postpaid-monthly-fix","postpaid-monthly-trial1","postpaid-monthly-trial7","prepaid-signature-item"]
postpaid-monthly-fix
postpaid-monthly-trial1
postpaid-monthly-trial7
prepaid-signature-item