JAXBの勉強・アンマーシャリングする

package weather.jaxb;

import generated.AreaType;
import generated.InfoType;
import generated.PeriodType;
import generated.PrefType;
import generated.RainfallchanceType;
import generated.Weatherforecast;
import java.io.File;
import java.util.List;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

public class Execute {
	public static void main(String[] args) throws Exception {
		try {
			JAXBContext context = JAXBContext.newInstance("generated");
			Unmarshaller unm = context.createUnmarshaller();
			Weatherforecast weatherforecast = (Weatherforecast)unm.unmarshal(new File("C:\\test\\weatherforecast.xml"));
			PrefType pref = weatherforecast.getPref();
			AreaType area = getArea(pref);
			InfoType info = getInfo(area);
			RainfallchanceType rainfall = info.getRainfallchance();
			List<PeriodType> periodList = rainfall.getPeriod();
			for(PeriodType period:periodList){
				System.out.println(period.getHour() + ":" + period.getValue());
			}
		} catch (JAXBException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Areaを取得
	 *
	 * @param pref
	 * @return
	 * @throws Exception
	 */
	private static AreaType getArea(PrefType pref) throws Exception {
		List<AreaType> areaList = pref.getArea();
		for(AreaType area:areaList){
			if(area.getId().equals("南部")){
				return area;
			}
		}
		throw new Exception();
	}

	/**
	 * 2009/12/19の情報を取得
	 *
	 * @param area
	 * @return
	 * @throws Exception
	 */
	private static InfoType getInfo(AreaType area) throws Exception {
		List<InfoType> ifnoList = area.getInfo();
		for(InfoType info:ifnoList){
			if(info.getDate().equals("2009/12/20")){
				return info;
			}
		}
		throw new Exception();
	}
}