Spring @RequestBody 中的枚举列表为空

Question

I have the below enum with two values, and i have a search api with many fields, One of these fields is a list of StatusEnum . So i created a dto that contains this field.

The problem when i send the data the list status is always empty

json exp: {"status":["En activité"],"startDate":null,"endDate":null}

public enum StatusEnum {

    INACTIVITY, ENDACTIVITY;

    private static Map<String, StatusEnum > namesMap = new HashMap<>(2);

    static {
        namesMap.put("En activité", INACTIVITY);
        namesMap.put("En fin d'activité", ENDACTIVITY);
    }

    @JsonCreator
    public static StatusEnum forValue(String value) {
        return namesMap.get(StringUtils.lowerCase(value));
    }

    @JsonValue
    public String toValue() {
        for (Entry<String, StatusEnum > entry : namesMap.entrySet()) {
            if (entry.getValue() == this)
                return entry.getKey();
        }
        return null;
    }

}


@PostMapping
public ResponseEntity<List<Object>> search(@RequestBody SearchDTO search) { }

public class SearchDTO {
 
   private Date startDate;
   private Date endDate
   private List<StatusEnum> status;
   //getter and setter
 
}

Answer 1

@JsonCreator
public static StatusEnum forValue(String value) {
    return namesMap.get(StringUtils.lowerCase(value));
}

Problem is the usage of #lowerCase in forValue . Your keys in your map aren't lower-cased. That's why namesMap.get can't find anything.