我不清楚 jackson 如何处理映射字段中的大写。如果有人可以提供帮助，我将不胜感激。

{"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，下面是我的异常(exception)......

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"])

上面是我的异常(exception)，下面是我的类(class)......

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

最佳答案

由于您的 setter 方法被命名为 setMDReqID(…) Jackson 假设变量被命名为 mDReqID 因为 Java 命名约定(变量应该以小写字母开头)。

如果您真的想要大写字母，请使用 @JsonProperty setter 上的注释(或 - 对于序列化 - 在 getter 上)，如下所示:

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

https://stackoverflow.com/questions/15303110/