在SpringBoot项目中,前后端规定传递时间使用时间戳(精度ms).

@Datapublic class Incident { @ApiModelProperty(value = "故障ID", example = "1") private Integer id; @ApiModelProperty(value = "故障产生时间", allowEmptyValue = true) private Instant createdTime; @ApiModelProperty(value = "故障恢复时间", allowEmptyValue = true) private Instant recoveryTime; }

以上为简略实体类定义.

@Transactional(rollbackFor = Exception.class)    @PostMapping(path = "/incident")    public void AddIncident(@Valid @RequestBody Incident incident) { incident.setBusinessId(0); if (1 != incidentService.addIncident(incident)) { throw new Exception("..."); } }

在实际使用过程中,发现Incident中的createdTime以及recoveryTime数值不对.

排查故障,前端去除时间戳后三位(即ms数),则时间基本吻合.

因此,可以确定是SpringBoot在转换Instant时使用Second进行转换.

因此对于Instant类型的转换添加自定义解析(SpringBoot使用com.fasterxml.jackson解析数据).

注意,.此处需要分别实现序列化(后端返回前端数据)以及反序列化(前端上传数据).

public class InstantJacksonDeserialize extends JsonDeserializer
    
      { @Override public Instant deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException { String text = jsonParser.getText(); Long aLong = Long.valueOf(text); Instant res = Instant.ofEpochMilli(aLong); return res; } }
    

public class InstantJacksonSerializer extends JsonSerializer
    
      { @Override public void serialize(Instant instant, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException { jsonGenerator.writeNumber(instant.toEpochMilli()); } }
    

在涉及到Instant的属性上加上相应注解,代码具体如下:

@Datapublic class Incident { @ApiModelProperty(value = "故障ID", example = "1") private Integer id; @JsonSerialize(using = InstantJacksonSerializer.class) @JsonDeserialize(using = InstantJacksonDeserialize.class) @ApiModelProperty(value = "故障产生时间", allowEmptyValue = true) private Instant createdTime; @JsonSerialize(using = InstantJacksonSerializer.class) @JsonDeserialize(using = InstantJacksonDeserialize.class) @ApiModelProperty(value = "故障恢复时间", allowEmptyValue = true) private Instant recoveryTime; }

添加注解后,Instant对象能够按照ms精度进行解析.

 

https://www.cnblogs.com/jason1990/p/10028262.html