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net.guerlab.commons is a suite of core and expanded libraries that include utility classes and much much more.

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/*
 * Copyright 2018-2021 guerlab.net and other contributors.
 *
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.guerlab.commons.time.jackson.serializer;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;

/**
 * 日期序列化处理
 *
 * @author guer
 */
public class LocalDateSerializer extends JsonSerializer {

    private static final LocalTime TIME = LocalTime.of(0, 0, 0, 0);

    @Override
    public void serialize(LocalDate value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        if (value == null) {
            gen.writeNull();
            return;
        }

        LocalDateTime dateTime = LocalDateTime.of(value, TIME);

        long time = dateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();

        gen.writeNumber(time);
    }
}