Jackson JSONで出力日付フォーマットを指定する

Ismail Seyfi's Blog: How to control Date formatting when Jackson JSON Processor is used with Spring 3.0

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.JsonSerializer;
import org.codehaus.jackson.map.SerializerProvider;

public class DateSerializer extends JsonSerializer<Date> {
	@Override
	public void serialize(Date value, JsonGenerator jgen, SerializerProvider provider) throws IOException,
			JsonProcessingException {

		DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd");
		String formatted = formatter.format(value);
		
		jgen.writeString(formatted);
		
	}
}

	@JsonSerialize(using = DateSerializer.class)
	public Date getEntryDate() {
		return entryDate;
	}