杰克逊JSON字段映射大写？

Question

我不清楚杰克逊如何处理绘图领域的资本化.如果有人可以提供帮助,我会很感激.

{"user":{"username":"user@host.com","password":"pwd","sendercompid":"COMPID","service":{"host":"address","port":6666,"service":"S1","serviceAsString":"s1"}},"MDReqID":"ghost30022","NoRelatedSym":1,"Symbol":["GOOG"],"MarketDepth":"0","NoMDEntryTypes":3,"MDEntryType":["0","1","2"],"SubscriptionRequestType":"1","AggregatedBook":"N"}:

上面是我的json,下面是我的例外......

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "MDReqID" (class com.myco.qa.fixrest.MarketDataRequest), not marked as ignorable (10 known properties: , "mdreqID", "marketDepth", "user", "subscriptionRequestType", "aggregatedBook", "mdentryType", "symbol", "mdupdateType", "noRelatedSym", "noMDEntryTypes"])

以上是我的例外,下面是我的班级......

public class MarketDataRequest {
    private User user;
    private String MDReqID;
    private char SubscriptionRequestType;
    private int MarketDepth;
    private int MDUpdateType;
    private char AggregatedBook;
    private int NoMDEntryTypes;
    private ArrayList<Character> MDEntryType;
    private int NoRelatedSym;
    private ArrayList<String> Symbol;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String getMDReqID() {
        return MDReqID;
    }

    public void setMDReqID(String MDReqID) {
        this.MDReqID = MDReqID;
    }

    public char getSubscriptionRequestType() {
        return SubscriptionRequestType;
    }

    public void setSubscriptionRequestType(char subscriptionRequestType) {
        SubscriptionRequestType = subscriptionRequestType;
    }

......等等

Answer 1

由于您的setter方法名为setMDReqID(…)Jackson,因此假定变量名为mDReqID,因为Java命名约定(变量应以小写字母开头).如果你真的想要一个大写字母,请在setter上使用@JsonProperty注释(或者 - 对于序列化 - 在getter上),如下所示:mDReqID.

Answer 2

添加@JsonProperty与您收到的Json字符串中的属性名称匹配的setter.

@JsonProperty("MDReqID")
public void setMDReqID(String MDReqID) {
    this.MDReqID = MDReqID;
}

另外@JsonProperty,为getter 添加注释以及输出以常规格式显示.

@JsonProperty("mDReqID")
public String getMDReqID() {
    return MDReqID;
}

您可以根据自己的喜好命名变量.

private String mdReqID;

Answer 3

你也可以

@JsonNaming(PropertyNamingStrategy.UpperCamelCaseStrategy.class)

类上以大写JSON消息中的所有属性名称