基于@JsonSerialize和@JsonInclude注解使用方法

//JsonSerializer<Integer>：Integer为要转换的类型
public class MySerializerUtils extends JsonSerializer<Integer> {
    @Override
    public void serialize(Integer status, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
        String statusStr = "";
        switch (status) {
            case 0:
                statusStr = "暂存";
                break;
            case 1:
                statusStr = "待上报";
                break;
            case 2:
                statusStr = "待审核";
                break;
            case 3:
                statusStr = "已审";
                break;
            case 4:
                statusStr = "退回";
                break;
            case -1:
                statusStr = "已删";
                break;
            default:
                statusStr = "状态信息不符合";
        }
        jsonGenerator.writeString(statusStr);
    }
}

//JsonSerializer<Date>：Date为要转换的类型
public class Date2LongSerializer extends JsonSerializer<Date> {
    @Override
    public void serialize(Date date, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
       jsonGenerator.writeNumber(date.getTime() / 1000);
    }
}

@JsonSerialize(using = MySerializerUtils.class)
private int status;

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

@Data
@JsonInclude(JsonInclude.Include.NON_NULL)
public class OrderDTO {
    private String orderId;
    private String buyerName;
    private String buyerPhone;
    private String buyerAddress;    
    private String buyerOpenid;
    List<OrderDetail> orderDetailList;//null,不返回
}

spring:
  jackson:
    default-property-inclusion: non_null

List<OrderDetail> orderDetailList = new ArrayList<>();

private String msr = "";
private String data;

@JsonInclude(JsonInclude.Include.NON_EMPTY)​​

ALWAYS,
NON_NULL, // 属性为NULL 不序列化,就是为null的字段不参加序列化    
NON_ABSENT, // 属性为默认值不序列化
NON_EMPTY, // 属性为 空（""） 或者为 NULL 都不序列化，则返回的json是没有这个字段的。这样对移动端会更省流量
NON_DEFAULT,
CUSTOM,
USE_DEFAULTS;

@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class MsgBean {}