Deserializing an enum with Jackson

@JsonCreator
public static Status forValue(String name)
{
    return EnumUtil.getEnumByNameIgnoreCase(Status.class, name);
}

Adding this static method would resolve your problem of deserializing

This is probably a faster way to do it:

public enum Status {
 READY("ready"),
 NOT_READY("notReady"),
 NOT_READY_AT_ALL("notReadyAtAll");

 private final String formatted;

 Status(String formatted) {
   this.formatted = formatted;
 }

 @Override
 public String toString() {
   return formatted;
 }
}

public static void main(String[] args) throws IOException {
  ObjectMapper mapper = new ObjectMapper();
  ObjectReader reader = mapper.reader(Status.class);
  Status status = reader.with(DeserializationFeature.READ_ENUMS_USING_TO_STRING).readValue("\"notReady\"");
  System.out.println(status.name());  // NOT_READY
}

For whoever is searching for enums with integer json properties. Here is what worked for me:

enum class Status (private val code: Int) {
    PAST(0),
    LIVE(2),
    UPCOMING(1);
    companion object {
        private val codes = Status.values().associateBy(Status::code)
        @JvmStatic @JsonCreator fun from (value: Int) = codes[value]
    }
}

EDIT: Starting from Jackson 2.6, you can use @JsonProperty on each element of the enum to specify its serialization/deserialization value (see here):

public enum Status {
    @JsonProperty("ready")
    READY,
    @JsonProperty("notReady")
    NOT_READY,
    @JsonProperty("notReadyAtAll")
    NOT_READY_AT_ALL;
}

---

(The rest of this answer is still valid for older versions of Jackson)

You should use @JsonCreator to annotate a static method that receives a String argument. That's what Jackson calls a factory method:

public enum Status {
    READY("ready"),
    NOT_READY("notReady"),
    NOT_READY_AT_ALL("notReadyAtAll");

    private static Map<String, Status> FORMAT_MAP = Stream
        .of(Status.values())
        .collect(Collectors.toMap(s -> s.formatted, Function.identity()));

    private final String formatted;

    Status(String formatted) {
        this.formatted = formatted;
    }

    @JsonCreator // This is the factory method and must be static
    public static Status fromString(String string) {
        return Optional
            .ofNullable(FORMAT_MAP.get(string))
            .orElseThrow(() -> new IllegalArgumentException(string));
    }
}

This is the test:

ObjectMapper mapper = new ObjectMapper();

Status s1 = mapper.readValue("\"ready\"", Status.class);
Status s2 = mapper.readValue("\"notReadyAtAll\"", Status.class);

System.out.println(s1); // READY
System.out.println(s2); // NOT_READY_AT_ALL

As the factory method expects a String, you have to use JSON valid syntax for strings, which is to have the value quoted.