java - 在 Jersey 消费 OffsetDateTime

Question

我正在尝试让我的服务器解析以下 JSON:

{"hardwareId":1,"registerTime":"2017-02-14T03:42:11.482Z","sensorId":1,"temperature":23.6}

registerTime 属性必须解析为 OffsetDateTime 实例:

@XmlRootElement
public class TemperatureRegister {

    private int m_hardwareId;
    private int m_sensorId;
    private OffsetDateTime m_registerTime;
    private double m_temperature;

    public TemperatureRegister() {

    }

    public TemperatureRegister(OffsetDateTime p_registerTime, double p_temperature, 
                               int p_hardwareId, int p_sensorId) {

        if (p_registerTime == null) {
            this.m_registerTime = OffsetDateTime.now(ZoneOffset.UTC);
        }
        this.m_registerTime = p_registerTime;
        this.m_temperature = p_temperature;
        this.m_hardwareId = p_hardwareId;
        this.m_sensorId = p_sensorId;
    }

    ...
 }

这就是我的资源方法的定义方式:

@POST
@Path("/insert")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public TemperatureRegister addOne(TemperatureRegister p_register) {
    m_mongoConnector.InsertOne(p_register);
    return p_register;
}

由于某种原因，在上面的方法中，p_register参数总是这样:

TemperatureRegister [m_hardwareId=1, m_sensorId=1, m_registerTime=null, m_temperature=23.6]

它正确映射了所有内容，但 registerTime 是 OffsetDateTime。它始终为null。为什么这是唯一有问题的值？

我做错了什么吗？是否需要一些特殊配置来处理 OffsetDateTime`？

Answer 1

如果您使用 Jackson 作为 JSON 提供程序，则需要 jackson-datatype-jsr310依赖支持OffsetDateTime :

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.8.6</version>
</dependency>

您还想用 @JsonProperty 注释 TemperatureRegister 字段当您的类字段名称与 JSON 属性名称不匹配时:

public class TemperatureRegister {

    @JsonProperty("hardwareId")
    private int m_hardwareId;

    @JsonProperty("sensorId")
    private int m_sensorId;

    @JsonProperty("registerTime")
    private OffsetDateTime m_registerTime;

    @JsonProperty("temperature")
    private double m_temperature;

    // Constructor, getters and setters omitted
}