将JSON数组转换为Java类对象列表
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我有一个来自WFC服务的JSON字符串.当我尝试将JSON数组转换为List对象时,我遇到以下错误:
".JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token at [Source: java.io.StringReader@41f27f18; line: 1, column: 1]"
Java类(卡类):
public class Card {
public String ID;
public String CompanyID;
public String CompanyName;
public String FiscalCode;
public String Limit;
public String StateID;
public String CardState;
public String Deleted;
public String Sold;
public String StartDate;
public String InvoiceStartDate;
public String Quantity;
public String Value;
public String CardTypeID;
public String CardType;
public String SoldChanged;
public String DriverName;
public String VehiclePlateNumber;
public String VehicleID;
public String Discount;
public String ContractID;
public String DiscountPerMonth;
public String ProductID;
public String ProductStateID;
public String Mail;
public String WithoutLimit;
public String ContractSold;
public String ContractLimit;
public String NumberOfTransactions;
public String DriverNameOnly;
public String DriverSurnameOnly;
}
反序列化的Java代码:
strResponse = responseHandler.handleResponse(response);
if (strResponse.contains("Credit") || strResponse.contains("Debit")) {
ObjectMapper mapper = new ObjectMapper();
strResponse= strResponse.replace("\"GetCardsResult\":", "");
userCards = mapper.readValue(strResponse, mapper.getTypeFactory().constructCollectionType(List.class, Card.class));
}
JSON字符串:
{ "GetCardsResult":"[{\"ID\":3,\"CompanyID\":1155,\"CompanyName\":\"test\",\"FiscalCode\":null,\"Code\":\"1423127205\",\"Limit\":0.000,\"StateID\":1,\"CardState\":\"Activ\",\"Deleted\":false,\"Sold\":0.000,\"StartDate\":\"\/Date(1412974800000+0300)\/\",\"InvoiceStartDate\":\"\/Date(-62135596800000+0200)\/\",\"Quantity\":null,\"Value\":0.0,\"CardTypeID\":1,\"CardType\":\"Credit\",\"SoldChanged\":false,\"DriverName\":\"\",\"VehiclePlateNumber\":\"B 222 ART\",\"VehicleID\":null,\"Discount\":null,\"ContractID\":15,\"DiscountPerMonth\":null,\"ProductID\":null,\"ProductStateID\":null,\"Mail\":\"\",\"WithoutLimit\":true,\"ContractSold\":null,\"ContractLimit\":null,\"NumberOfTransactions\":null,\"DriverNameOnly\":null,\"DriverSurnameOnly\":null},{\"ID\":2881,\"CompanyID\":1155,\"CompanyName\":\"test\",\"FiscalCode\":null,\"Code\":\"test0000\",\"Limit\":125.000,\"StateID\":1,\"CardState\":\"Activ\",\"Deleted\":false,\"Sold\":132.330,\"StartDate\":\"\/Date(1436130000000+0300)\/\",\"InvoiceStartDate\":\"\/Date(-62135596800000+0200)\/\",\"Quantity\":null,\"Value\":0.0,\"CardTypeID\":1,\"CardType\":\"Credit\",\"SoldChanged\":false,\"DriverName\":\"aaa aaa\",\"VehiclePlateNumber\":\"aaa\",\"VehicleID\":null,\"Discount\":null,\"ContractID\":15,\"DiscountPerMonth\":null,\"ProductID\":null,\"ProductStateID\":null,\"Mail\":\"\",\"WithoutLimit\":true,\"ContractSold\":null,\"ContractLimit\":null,\"NumberOfTransactions\":null,\"DriverNameOnly\":null,\"DriverSurnameOnly\":null}]" }
提前致谢!
解决方法:
试试这个:
try {
JSONObject jsonObject = null;
yourJSONString.replace("\\", "");
jsonObject = new JSONObject(yourJSONString);
String newJSONString = jsonObject.get("GetCardsResult").toString();
JSONArray jsonMainArr = new JSONArray(newJSONString);
//now just loop the json Array
for (int i = 0; i < jsonMainArr.length(); ++i) {
JSONObject rec = jsonMainArr.getJSONObject(i);
card.set_id(rec.get("ID").toString());
//....
}
} catch (JSONException e) {
e.printStackTrace();
}
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