我在用自定义类的arraylist映射json响应时遇到问题。
问题是它无法识别json响应中的“userswithdistance”字段,即使我在json response类中将其设置为arraylist。错误是:

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "userswithdistance" (class com.az.d.classes.models.JSONResponse), not marked as ignorable (4 known properties: "success", "usersWithDistance", "action", "error"])

这里是json响应
{
    "action": "get_users",
    "success": 1,
    "error": 0,
    "userswithdistance": [
        {
            "usr_id": "4",
            "distance": 9896.348
        },
        {
            "usr_id": "5",
            "distance": 11536.063
        }
    ]
}

这是包装json响应的json response类。
public class JSONResponse {
    private String _action;
    private int _success;
    private int _error;

    private ArrayList<UsersWithDistance> _userswithdistance;

    public String getAction() { return _action; }
    public int getSuccess() { return _success; }
    public int getError() { return _error; }
    public ArrayList<UsersWithDistance> getUsersWithDistance() { return _userswithdistance; }

    public void setAction(String value) { _action = value; }
    public void setSuccess(int value) { _success = value; }
    public void setError(int value) { _error = value; }
    public void setUsersWithDistance(ArrayList<UsersWithDistance> value) { _userswithdistance = value; }
}

这是userswithdistance类。
public class UsersWithDistance {
    private String _usr_id;
    private double _distance;

    public String getUsr_id() { return _usr_id; }
    public double getDistance() { return _distance; }

    public void setUsr_id(String value) { _usr_id = value; }
    public void setDistance(double value) { _distance = value; }
}

我在Java中使用的代码是:
JSONResponse result = mapper.readValue(URL, JSONResponse.class);

最佳答案

你有两个选择:
i.将setter方法名更改为:

public void setUserswithdistance(ArrayList<UsersWithDistance> _userswithdistance) {
    this._userswithdistance = _userswithdistance;
}

二。添加注释:
@JsonProperty("userswithdistance")
private ArrayList<UsersWithDistance> _userswithdistance;

07-24 09:49
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