格式化日期以响应POST rest API

时间:2018-10-19 06:53:16

标签: rest spring-boot kotlin

我在spring boot + kotlin中创建了一个POST API。我创建了一个LocalDate对象,但是不需要响应。我用过

  

org.springframework.format.annotation.DateTimeFormat

我得到的是这样的:

<user>
    <email>a@mail.com</email>
    <lname></lname>
    <fname></fname>
    <birthday>
            <year>2000</year>
            <month>JANUARY</month>
            <chronology>
                <id>ISO</id>
                <calendarType>iso8601</calendarType>
            </chronology>
            <dayOfMonth>1</dayOfMonth>
            <dayOfWeek>SATURDAY</dayOfWeek>
            <era>CE</era>
            <dayOfYear>1</dayOfYear>
            <leapYear>true</leapYear>
            <monthValue>1</monthValue>
    </birthday>
</user>

我想要的是类似的东西(特别是 birthDay 标签):

<user>
    <email>a@mail.com</email>
    <lname></lname>
    <fname></fname>
    <birthday>2000-01-01</birthday>
</user>

代码如下:

dto类:

import org.springframework.format.annotation.DateTimeFormat
import java.time.LocalDate

@JacksonXmlRootElement
data class User (var email: String? = "",
    var lname: String = "",
    var fname: String = "",

    @DateTimeFormat(pattern = "yyyy-MM-dd")
    var birthday: LocalDate? = null)

控制器类:

@RestController
@RequestMapping("/")
class Controller {


    @PostMapping("/post")
    fun registerByMail(@Valid body: User) : ResponseEntity<Any> {
    .
    .
    .
    var user = User(birthDay = body.birthDay)
    return ResponseEntity.ok(user)

请让我知道我做错了什么。我正在使用邮递员发出POST请求。

编辑:我也尝试过此处提到的解决方案:JSON Java 8 LocalDateTime format in Spring Boot,但这对我也不起作用。

当我使用 com.fasterxml.jackson.annotation.JsonFormat 注释和必需的依赖项时,出现以下错误:

<defaultMessage>Failed to convert value of type 'java.lang.String[]' to 
required type 'java.time.LocalDate'; nested exception is 
org.springframework.core.convert.ConversionFailedException: Failed to 
convert from type [java.lang.String] to type 
[@com.fasterxml.jackson.annotation.JsonFormat java.time.LocalDate] for value 
'2000-01-01'; nested exception is java.lang.IllegalArgumentException: Parse 
attempt failed for value [2000-01-01]</defaultMessage>

1 个答案:

答案 0 :(得分:0)

您必须注释字段@field:JsonSerialize而不是属性。 除此之外,您还必须使用@JsonFormat

@JacksonXmlRootElement
data class User(
    var email: String? = "",
    var lname: String = "",
    var fname: String = "",

    @field:JsonFormat(pattern = "yyyy-MM-dd")
    @field:JsonSerialize(using = LocalDateSerializer::class)
    @field:JsonDeserialize(using = LocalDateDeserializer::class)
    var birthday: LocalDate? = null
)

我的小测试:

val mapper = XmlMapper()
val xml = mapper.writeValueAsString(User(birthday = LocalDate.now()))
println(xml)

生成以下输出:

<User><email></email><lname></lname><fname></fname><birthday>2018-10-19</birthday></User>