枚举作为 Spring Boot Rest 中的请求参数

Question

我是 spring 引导新手，正在尝试使用 Enum 作为休息请求的参数。

这是我的枚举 class:

public enum Month {

    JANUARY (1, "january"), FEBRUARY(2,"february"), MARCH(3,"march"),
    APRIL(4,"april"), MAY(5,"may"), JUNE(6,"june"), JULY(7,"july"),
    AUGUST(8, "august"), SEPTEMBER(9,"september"), OCTOBER(10,"october"),
    NOVEMBER(11,"november"), DECEMBER(12,"december");

    private String desc;
    private int id;

    //Constructure

    //Getters and Setters
}

在我的控制器中class我正在使用这个方法：

    @RequestMapping(value = "/testmonth", method = RequestMethod.POST)
        public Month TestForMonth(@RequestBody Month inputPayload) {
            Month response = inputPayload;
            response.setId(inputPayload.getId());
            response.setDesc(inputPayload.getDesc());
            System.out.println("As String: " + inputPayload.getDesc() + ". As int " + inputPayload.getId() + ".");
            return response;
        }

这是我的 JSON:

{
    Month: "JANUARY"
}

但它不起作用..我收到此错误：

.w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `com.example.simplerestapis.models.Month` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `com.example.simplerestapis.models.Month` out of START_OBJECT token
 at [Source: (PushbackInputStream); line: 1, column: 1]]

Answer 1

您的正文被声明为简单枚举类型，而不是对象。因此，不要 posting JSON 带有大括号的对象，而是尝试 post 只有一个值，例如：

"JANUARY"

枚举作为 Spring Boot Rest 中的请求参数

Enums as Request Parameters in Spring Boot Rest

java

rest

spring-boot

spring-restcontroller

request-mapping