PersistentLocalDate.java

package fx.time;

import java.sql.Date;
import java.time.LocalDate;

import javax.persistence.AttributeConverter;
import javax.persistence.Converter;

@Converter(autoApply = true)
public class PersistentLocalDate implements AttributeConverter<LocalDate, Date> {

	@Override
	public Date convertToDatabaseColumn(LocalDate value) {
		return value == null ? null : Date.valueOf(value);
	}

	@Override
	public LocalDate convertToEntityAttribute(Date value) {
		return value == null ? null : value.toLocalDate();
	}
}

PersistentLocalDateTime.java

package fx.time;

import java.sql.Timestamp;
import java.time.LocalDateTime;

import javax.persistence.AttributeConverter;
import javax.persistence.Converter;

@Converter(autoApply = true)
public class PersistentLocalDateTime implements AttributeConverter<LocalDateTime, Timestamp> {

	@Override
	public java.sql.Timestamp convertToDatabaseColumn(LocalDateTime value) {
		return value == null ? null : Timestamp.valueOf(value);
	}

	@Override
	public LocalDateTime convertToEntityAttribute(Timestamp value) {
		return value == null ? null : value.toLocalDateTime();
	}
}

PersistentYearMonth.java

package fx.time;

import java.sql.Date;
import java.time.YearMonth;

import javax.persistence.AttributeConverter;
import javax.persistence.Converter;

@Converter(autoApply = true)
public class PersistentYearMonth implements AttributeConverter<YearMonth, Date> {

	@Override
	public Date convertToDatabaseColumn(YearMonth value) {
		return value == null ? null : Date.valueOf(value.atDay(1));
	}

	@Override
	public YearMonth convertToEntityAttribute(Date value) {
		return value == null ? null : YearMonth.from(value.toLocalDate());
	}
}