為什么 Jackson 在序列化時使用了錯誤的元素名稱？

Question

我有一個 Object，我希望 Jackson 像這樣序列化......

<AccountsResponse>
    <accounts>
        <account/>
        <account>
            <userId>user</userId>
            ...
        </account>
    </accounts>
</AccountsResponse>

為了嘗試這個，我創建了以下 class...

@Getter
@Setter
@ToString
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class Payload {
    @JacksonXmlProperty(localName = "errormessage")
    private String errorMessage;
}


@Getter
@Setter
@ToString
public class AccountsResponse extends Payload{
    @JsonIgnore
    private static Logger LOGGER = LogManager.getLogger(AccountsResponse.class);

    @JacksonXmlProperty(localName = "accounts")
    private List<Account> accounts = Lists.newArrayList();
    public static AccountsResponse mapFromResultSet(ResultSet rs)
            throws SQLException
    {
        AccountsResponse response = new AccountsResponse();
        do {
            Account acct = Account.mapFromResultSet(rs);
            response.getAccounts().add(acct);
        } while (rs.next());
        return response;
    }
    public String toXml() throws JsonProcessingException {
        ObjectMapper mapper = new XmlMapper();
        return mapper.writeValueAsString(this);
    }
}

@Getter
@Setter
@JsonInclude(JsonInclude.Include.NON_NULL)
public class Account extends ResultSetParser{
    ...
}

但是當我連載時我得到...

<AccountsResponse>
    <accounts>
        <accounts/>
        <accounts>
            <userId>user</userId>
            ...
        </accounts>
    </accounts>
</AccountsResponse>

如您所見，這里的問題是子標簽應該是account但實際上是accounts 。 我嘗試使用本地名稱進行修改，但找不到正確的 VooDoo 組合。 我究竟做錯了什么？

Answer 1

我會更改 AccountsResponse 中帳戶列表上的注釋：

public class AccountsResponse extends Payload{

    @JacksonXmlElementWrapper(localName = "accounts")
    @JacksonXmlProperty(localName = "account")
    private List<Account> accounts = Lists.newArrayList();

}