im-backed/im-common/src/main/java/com/bx/imcommon/serializer/DateToLongSerializer.java

package com.bx.imcommon.serializer;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.core.type.WritableTypeId;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;

import java.io.IOException;
import java.util.Date;

public class DateToLongSerializer extends JsonSerializer<Date> {

    @Override
    public void serialize(Date date, JsonGenerator jsonGenerator,
                          SerializerProvider serializerProvider) throws IOException {
        jsonGenerator.writeNumber(date.getTime());
    }

    @Override
    public void serializeWithType(Date value, JsonGenerator gen, SerializerProvider serializers, TypeSerializer typeSer) throws IOException {
        WritableTypeId typeIdDef = typeSer.writeTypePrefix(gen,
                typeSer.typeId(value, JsonToken.VALUE_STRING));
        serialize(value, gen, serializers);
        typeSer.writeTypeSuffix(gen, typeIdDef);
    }
}