获取自定义格式的时间代码,Java代码库,德仔网

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【Java】获取自定义格式的时间
作者:首君 / 发布于2015/11/4/ 649

	import java.io.IOException;
	import java.text.DateFormat;
	import java.text.ParseException;
	import java.text.SimpleDateFormat;
	import java.util.ArrayList;
	import java.util.Calendar;
	import java.util.Date;
	import java.util.List;

	import cn.com.agree.ab.trade.core.Trade;

	/**
	* <DL>
	* <DT><B> 功能说明</B></DT>
	* 字符串处理工具
	* </DL>
	*
	* @author
	* @since 2015-6-3
	*/
	public class DateUtil {
	/**
	 * <b>功能说明</b> 获取自定义格式的时间
	 *
	 * @param format
	 * 格式
	 * 
	 * <b>例如：</b>
	 * 使用例子说明 String a=NetCheck.getdataString("yyyyMMdd");
	 * 
	 */

	public static String getdataString(String format) {
	 DateFormat dateFormat = new SimpleDateFormat(format);
	 return dateFormat.format(new Date());
	}

	public static String getNextDay(Date date, String format) {
	 Calendar calendar = Calendar.getInstance();
	 calendar.setTime(date);
	 calendar.add(Calendar.DAY_OF_MONTH, -7);
	 date = calendar.getTime();
	 DateFormat dateFormat = new SimpleDateFormat(format);
	 return dateFormat.format(date);
	}

	public static String getFormatDate(String datestr) throws ParseException {

	 SimpleDateFormat df = new SimpleDateFormat("yyyyMMddhhmmss");
	 Date date = null;
	 date = df.parse(datestr);
	 DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	 return dateFormat.format(date);
	}
	public static String getNextDay(Date date, String format, int days) {
	 Calendar calendar = Calendar.getInstance();
	 calendar.setTime(date);
	 calendar.add(Calendar.DAY_OF_MONTH, days);
	 date = calendar.getTime();
	 DateFormat dateFormat = new SimpleDateFormat(format);
	 return dateFormat.format(date);
	}
	public static List<String> getMonthWeekends(Trade trade,int month,int year) throws IOException{

	 List<String> hostDays = new ArrayList<String>();
	 Calendar cal = Calendar.getInstance();
	 cal.set(Calendar.YEAR, year);
	 cal.set(Calendar.MONTH, month-1);
	 cal.set(Calendar.DAY_OF_MONTH, 1);
	 int startIndex = cal.get(Calendar.DAY_OF_WEEK) -1 ; // 0~6 表示 周日 ~ 周六
	 int endIndex = startIndex + getLastDayOfMonth(year, month) - 1;
	 int startday = 1;
	 for (int i = 0; i < 42; i++) {
	 if (i >= startIndex && i <= endIndex) {
	 cal.set(Calendar.DAY_OF_MONTH, startday);
	 if(cal.get(Calendar.DAY_OF_WEEK)==1||cal.get(Calendar.DAY_OF_WEEK)==7){
	 hostDays.add(startday+"");
	 }
	 startday++;
	 }
	 }
	 return hostDays;
	
	}
	public static boolean isLeapYear(int year) {
	 return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
	}
	public static int getLastDayOfMonth(int year, int month) {
	 if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8
	 || month == 10 || month == 12) {
	 return 31;
	 }
	 if (month == 4 || month == 6 || month == 9 || month == 11) {
	 return 30;
	 }
	 if (month == 2) {
	 if (isLeapYear(year)) {
	 return 29;
	 } else {
	 return 28;
	 }
	 }
	 return 0;

	}
	}
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