枚舉作為Spring Boot Rest中的請求參數

Question

我是Spring的新手，並嘗試使用Enum作為休息請求的參數。

這是我的Enum課程：

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
}

在我的控制器類中，我使用此方法：

    @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;
        }

這是我的JSON：

{
    Month: "JANUARY"
}

但它不起作用..我收到此錯誤：

.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

您的身體被聲明為簡單的枚舉類型，而不是對象。 因此，不要使用大括號發布JSON對象，而是嘗試僅發布一個值，例如：

"JANUARY"