springboot无法以更易读的方式将ZonedDatetime转换为json响应

Question

{
    "DateTime": {
        "offset": {
            "totalSeconds": 19800,
            "id": "+05:30",
            "rules": {
                "transitionRules": [],
                "transitions": [],
                "fixedOffset": true
            }
        },
        "zone": {
            "id": "Asia/Calcutta",
            "rules": {
                "transitionRules": [],
                "transitions": [
                    {
                        "offsetBefore": {
                            "totalSeconds": 21208,
                            "id": "+05:53:28",
                            "rules": {
                                "transitionRules": [],
                                "transitions": [],
                                "fixedOffset": true
                            }
                        }

我尝试在对象映射器中使用日期格式化程序，但没有像预期的那样工作。

    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy hh:mm");
        objectMapper.setDateFormat(dateFormat);
        return objectMapper;

还尝试使用@jsonformat(pattern=“dd::mm::yyyy”）注释。没有给出结果。

public class Response {
    @JsonProperty(
            value = "DateTime",
            required = false
    )
    @XmlElement(
            name = "DateTime",
            required = false
    )
    @JsonFormat(pattern = "dd::MM::yyyy")
    private ZonedDateTime dateTime;

Answer 1

确保您有jackson-datatype-jsr310作为依赖项。这个模块包含所有java.time类的序列化器和反序列化器，这些类还应该支持指定自定义模式。

spring-boot配置的默认ObjectMapper应该从类路径中自动提取这个模块。

如果您自己配置ObjectMapper，则需要注册模块

objectMapper.registerModule(new JavaTimeModule());

objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);