Jackson - Deserialise Different Date formats

Question

i am using JsonDeserializer to format my Date as below:

public class CustomDateMappingDeserialize extends JsonDeserializer<Date>{

    @Override
    public Date deserialize(JsonParser paramJsonParser, DeserializationContext paramDeserializationContext) throws IOException, JsonProcessingException {
         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            String date = paramJsonParser.getText();
            try {
                Date formattedDate= format.parse(date);
              return formattedDate;
            } catch (ParseException e) {
                throw new RuntimeException(e);
            }

    }

}

but the problem is i have to define the Format fixed here and i have many different date formats.

Can we do something like this:

@JsonDeserialize(using = CustomDateMappingDeserialize.class, format ="yyy-dd-mm")
public void setDate(Date date) {
    this.date = date;
}

Instead of defining it in Custom class ?

Any help/pointers would be highly appreciated.

Ramachandran.A.G · Accepted Answer · 2017-01-31T10:31:48.703

For a previous requirement of similar nature i had used multi parser options as documented here.

Following similar lines , the following custom class is an example

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

public class CustomDeserializer extends JsonDeserializer<Date> {
    private static final String[] DATE_FORMATS = new String[] { "MMM dd, yyyy HH:mm:ss", "MMM dd, yyyy" };

    @Override
    public Date deserialize(JsonParser paramJsonParser, DeserializationContext paramDeserializationContext)
            throws IOException, JsonProcessingException {
        // TODO Auto-generated method stub
        if (paramJsonParser == null || "".equals(paramJsonParser.getText()))
            return null;
        String date = paramJsonParser.getText();

        for (String format : DATE_FORMATS) {
            try {
                return new SimpleDateFormat(format, Locale.US).parse(date);
            } catch (ParseException e) {
            }
        }
        return null;
    }
}

Edit :

You can also use additional libraries as outlined by suggestion here using MultiDateTimeParsers.

Jackson - Deserialise Different Date formats

1 Answers1