getdate.java

JAVA实现的酒店管理系统

package file1;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.StringTokenizer;

public class GetDate {
	private int year = -1;
	private int month = -1;
	private int dateOfMonth = -1;

	public GetDate() {

	}

	public String getDate(String date) {
		try {
			StringTokenizer st = new StringTokenizer(date, "-");
			int count = 0;
			int test = 0;
			while (st.hasMoreTokens()) {
				switch (count) {
				case 0:
					year = Integer.valueOf(st.nextToken().trim());
					count++;
					test++;
					break;
				case 1:
					month = Integer.valueOf(st.nextToken().trim());
					count++;
					test++;
					break;
				case 2:
					dateOfMonth = Integer.valueOf(st.nextToken().trim());
					test++;
					break;
				default:
					break;
				}
			}
			if (test != 3) {
				return null;
			}
			if (month < 0 || month > 12) {
				return null;
			}
			if (dateOfMonth < 0 || dateOfMonth > 31) {
				return null;
			}
			Calendar c = Calendar.getInstance();
			c.set(year, month - 1, dateOfMonth);
			SimpleDateFormat smf = new SimpleDateFormat("yyyy-MM-dd");
			Date dateGet = c.getTime();
			String converted = smf.format(dateGet);
			return converted;
		} catch (Exception e) {
			return null;
		}

	}

	public int getYear() {
		if (year != -1) {
			return year;
		} else {
			return 0;
		}
	}

	public int getMonth() {
		if (month != -1) {
			return month;
		} else {
			return 0;
		}
	}

	public int getDateOfMonth() {
		if (dateOfMonth != -1) {
			return dateOfMonth;
		} else {
			return 0;
		}
	}
}