计算月的天数

package com.yingxia.assetmanager.server.common;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Common {

	private static SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月");
	/**
	 * @param dateString like: 2009年10月
	 * @return
	 */
	public static int getDayCountOfMonth(String dateString) {

		try {
			Date date = format.parse(dateString);
			Calendar calendar = new GregorianCalendar();
			calendar.setTime(date);
			return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		
		return -1;
	}
}