holmos.webtest.customunitls.DateUnitls Maven / Gradle / Ivy
package holmos.webtest.customunitls;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* @author 吴银龙([email protected])
* */
public class DateUnitls {
/**
* 将给定的Date对象转换为指定格式Date信息
* @param date 指定的Date日期对象
* @param pattern 指定的格式
* @return 转换后的String信息
*/
public static String dateToStr(Date date,String pattern) {
if(pattern == null){
pattern = "yyyy-MM-dd HH:mm:ss.SSS";
}
DateFormat dateFormat = new SimpleDateFormat(pattern);
return dateFormat.format(date);
}
/**
* 将给定格式的Date信息转换为Date对象
* @param strDate 给定的Date信息
* @param pattern 给定的Date信息格式
* @return 转换好的Date对象
* @throws ParseException
*/
public static Date strToDate(String strDate,String pattern) throws ParseException {
if(pattern == null){
pattern = "yyyy-MM-dd HH:mm:ss.SSS";
}
DateFormat dataFormat = new SimpleDateFormat(pattern);
return dataFormat.parse(strDate);
}
/**
*
* @return,如 2009-2-20
*/
public static Date getToday(){
Calendar calendar = Calendar.getInstance();
return calendar.getTime();
}
/**
*
* @param year
* @param month
* @param date
* @return,如 2009-2-20
*/
public static Date makeDate(int year,int month,int date){
Calendar calendar = Calendar.getInstance();
calendar.set(year, month-1, date);
SimpleDateFormat dataFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
dataFormat.format(calendar.getTime());
return calendar.getTime();
}
/**
*
* @param date1,如2008-12-19
* @param date2,如2008-12-20
* @return true 代表两个日期相同，否则不同
*/
public static boolean compareDate(Date date1,Date date2) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd HH:mm");
return dateFormat.format(date1).equals(dateFormat.format(date2));
}
/**
* 获得该指定天在这一年的第几个星期里
* @param year
* @param month
* @param day
* @return
*/
public static int getWeekOrder(int year,int month,int day){
Calendar calendar=Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH,month);
calendar.set(Calendar.DAY_OF_MONTH, day);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
/**
* 获得两个指定日期间的间隔天数
* @param d1
* @param d2
* @return
*/
public int getDaysBetween(Calendar startCalendar, Calendar endCalendar){
if (startCalendar.after(endCalendar)){
java.util.Calendar swap = startCalendar;
startCalendar = endCalendar;
endCalendar = swap;
}
int days = endCalendar.get(Calendar.DAY_OF_YEAR) - startCalendar.get(Calendar.DAY_OF_YEAR);
int year = endCalendar.get(Calendar.YEAR);
if (startCalendar.get(Calendar.YEAR) != year){
startCalendar = (Calendar) startCalendar.clone();
do{
days += startCalendar.getActualMaximum(Calendar.DAY_OF_YEAR);//得到当年的实际天数
startCalendar.add(Calendar.YEAR, 1);
} while (startCalendar.get(Calendar.YEAR) != year);
}
return days;
}
}