我制作了一个elasticsearch（7.8.1版）文档，其中包含以下Map：

{
    "transaction": {
        "mappings": {
            "properties": {
                "_class": {
                    "type": "text",
                    "fields": {
                        "keyword": {
                            "type": "keyword",
                            "ignore_above": 256
                        }
                    }

                },
                "settlementEntries": {
                    "type": "nested",
                    "properties": {
                        "settlementDate": {
                            "type" : "date",
                            "format" : "uuuu-MM-dd"
                        },
                        "settlementId": {
                            "type": "long"
                        }
                    }
                },
                "transactionId": {
                    "type": "text",
                    "fields": {
                        "keyword": {
                            "type": "keyword",
                            "ignore_above": 256
                        }
                    }
                }
            }
        }
    }
}

我使用yyyy-mm-dd格式来存储结算日期。当我使用curl进行查询时，我可以使用 CURL -X GET localhost:9200/transaction/_search . 但是，当我试图通过springboot执行相同操作时，它会抛出一个错误。我的实体是：

public class TransactionBo {

    @Id
    private String transactionId;
    @Field(type = FieldType.Nested)
    private SettlementEntryBo settlementEntries;

}

和

public class SettlementEntryBo {

    @Id
    private Long settlementId;
    @Nullable
    @Field(type = FieldType.Date, format = DateFormat.custom, pattern = "uuuu-MM-dd")
private Date settlementDate;

}

据我所知，问题在于这里的Map：

@Field(type = FieldType.Date, format = DateFormat.custom, pattern = "uuuu-MM-dd")
private Date settlementDate;

[错误代码段]：
2020-09-05 02:51:18.105错误10080---[nio-8090-exec-4]o.a.c.c.c.[/].[dispatcherservlet]：路径为[]的上下文中servlet[dispatcherservlet]的servlet.service（）引发异常[请求处理失败；嵌套的异常是java.time.datetimeexception:无法从temporalaccessor获取instant:{}，iso已解析为类型为java.time.format.parsed]的2016-01-01，并带有根本原因
java.time.temporal.unsupportedtemporaltypeexception:不支持的字段：instantseconds