DayUtils 处理开始时间和结束时间的工具类

import java.util.Calendar;import java.util.Date;import org.nutz.lang.Times;

public class DayUtils {public static String timeFormat(Date tim){return Times.format("yyyyMMdd", tim);}public static String standardTimeFormat(Date tim){return standardTimeFormat(tim, "yyyy-MM-dd");}public static String standardTiFormat(Date tim){return standardTimeFormat(tim, "yyyy_MM_dd");}public static String standardTimeFormat(Date tim,String pattern){return Times.format(pattern, tim);}public static int getRangeDays(long beginTime, long endTime){int rangeDays = 0;Calendar ca1 = Calendar.getInstance();ca1.setTimeInMillis(beginTime);Calendar ca2 = Calendar.getInstance();ca2.setTimeInMillis(endTime);int year1 = ca1.get(Calendar.YEAR);int year2 = ca2.get(Calendar.YEAR);// 判断是否是同一年if (year1 == year2) {rangeDays = ca2.get(Calendar.DAY_OF_YEAR)- ca1.get(Calendar.DAY_OF_YEAR);} else if (year2 > year1) {int max = ca1.getActualMaximum(Calendar.DAY_OF_YEAR);int firstDay = max - ca1.get(Calendar.DAY_OF_YEAR);rangeDays = firstDay + ca2.get(Calendar.DAY_OF_YEAR);// 假如超过一年，则加上中间这些年的天数if (year2 - year1 > 1) {for (int i = year1 + 1; i < year2; i++) {Calendar ca = Calendar.getInstance();ca.set(Calendar.YEAR, i);int maxday = ca.getActualMaximum(Calendar.DAY_OF_YEAR);rangeDays += maxday;}}}return rangeDays;}}