Date转换Long

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实体类

package com.imooc.dto;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.imooc.dataobject.OrderDetail;
import com.imooc.enums.OrderStatusEnum;
import com.imooc.enums.PayStatusEnum;
import com.imooc.utils.EnumUtil;
import com.imooc.utils.serializer.Date2LongSerializer;
import lombok.Data;

import java.math.BigDecimal;
import java.util.Date;
import java.util.List;

@Data
//@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)返回对象不为空
//@JsonInclude(JsonInclude.Include.NON_NULL)
public class OrderDTO {

    /** 订单id. */
    private String orderId;

    /** 买家名字. */
    private String buyerName;

    /** 买家手机号. */
    private String buyerPhone;

    /** 买家地址. */
    private String buyerAddress;

    /** 买家微信Openid. */
    private String buyerOpenid;

    /** 订单总金额. */
    private BigDecimal orderAmount;

    /** 订单状态, 默认为0新下单. */
    private Integer orderStatus;

    /** 支付状态, 默认为0未支付. */
    private Integer payStatus;

    /** 创建时间. */
    @JsonSerialize(using = Date2LongSerializer.class)
    private Date createTime;

    /** 更新时间. */
    @JsonSerialize(using = Date2LongSerializer.class)
    private Date updateTime;

    List<OrderDetail> orderDetailList;

    @JsonIgnore
    public OrderStatusEnum getOrderStatusEnum() {
        return EnumUtil.getByCode(orderStatus, OrderStatusEnum.class);
    }

    @JsonIgnore
    public PayStatusEnum getPayStatusEnum() {
        return EnumUtil.getByCode(payStatus, PayStatusEnum.class);
    }
}

UTILS

package com.imooc.utils.serializer;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.util.Date;

public class Date2LongSerializer extends JsonSerializer<Date> {

    @Override
    public void serialize(Date date, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
        jsonGenerator.writeNumber(date.getTime() / 1000);
    }
}