如何使 LocalTime 实例变量根据我的特定格式接受 json 数据？

Question

im having a problem, im basically getting data as Json objects from an API, the field time in the Json object is set to a format like this: HH:mm

I am having a problem filling in LocalTime object since its defualt format looks like this 23:37:48.120473200 (LocalTime is an instance variable in my Message class)

how can i solve this?

Message class

public class Message {
    private LocalDate date;
    private LocalTime time;
    private String message;
    private String messageId;


    public Message(LocalDate date, LocalTime time, String message, String messageId) {
        this.date = date;
        this.time = time;
        this.message = message;
        this.messageId = messageId;
    }

    @Override
    public String toString() {
        return "Message{" +
                "date='" + date + '\'' +
                ", time='" + time + '\'' +
                ", message='" + message + '\'' +
                ", messageId='" + messageId + '\'' +
                '}';
    }

    public String getMessageId() {
        return messageId;
    }

    public void setMessageId(String messageId) {
        this.messageId = messageId;
    }

    public LocalDate getDate() {
        return date;
    }

    public void setDate(LocalDate date) {
        this.date = date;
    }

    public LocalTime getTime() {
        return time;
    }

    public void setTime(LocalTime time) {
        this.time = time;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

}

Answer 1

tl;dr

LocalTime.parse( "03:23" )

Details

Text in format of hour in 24-hour clock with padding zero, followed by a COLON and minute with padding zero, complies with the ISO 8601 standard for textual date-time formats.

The java.time classes use ISO 8601 formats by default when parsing such text. So no need to specify a formatting pattern.

String input = "03:23" ;
LocalTime lt = LocalTime.parse( input ) ;

If you use a framework for parsing your JSON, you should be able to ask the framework to do this parsing for you. The major JSON frameworks have been updated to leverage the java.time classes.