如何将日期时间从sqlserver转换为java.util.Date

Question

I am getting a row from a table with sql server database (with Asp net core as web api) using retrofit library in android and as far as I understood I must consider an string equivalent to datetime and then convert it to java.util.Date. An example of retrieved date time is 2018-10-29T19:56:59 . Is there anyway to convert datetime to java.util.Date directly? the code is shown below.

public class Food {
    @SerializedName("Id")
    private long Id;

    @SerializedName("Name")
    private String Name;

    @SerializedName("Content")
    private String Content;

    @SerializedName("IsActive")
    private boolean IsActive;

    @SerializedName("DoesExist")
    private boolean DoesExist;

    @SerializedName("Cost")
    private int Cost;

    @SerializedName("OffPercentage")
    private int OffPercentage;

    @SerializedName("OffTimeout")
    private Date OffTimeout;
...
}

Answer 1

Change your private Date OffTimeout to String, something like this :

@SerializedName("OffTimeout")
private String OffTimeout;

And use this method to parse your date.

public static Date fromStringToDate(String stringDate, String pattern){
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        try {
            Date date = format.parse(stringDate);
            return date;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

Use:

 Date mydate = fromStringToDate(yourOffTimeOut, "yyyy-MM-dd'T'HH:mm:ss");

Answer 2

Try JodaTime with custom deserializer:

//GSON config
Gson gson = new GsonBuilder()
            .registerTypeAdapter(DateTime.class, new DateTimeDeserializer ())
            .create();


// DateTimeDeserializer.class
    public class DateTimeDeserializer implements JsonDeserializer<DateTime > {

      @Override
      public DateTime deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
          throws JsonParseException {
        return DateTime.parse(json.getAsString());
      }
    }

Answer 3

Another possible solution would be to convert it to Unix timestamp on a server before sending it. Timestamp is much more robust format for dealing with dates / times