满足某个日期满足条件的周、月日期处理工具类

Posted by 石福鹏 on 2020-12-04

主要用法看一下main方法中的说明就知道了

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

public class MyDateUtils {
public static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

public static void main(String args[]) {
System.out.println("----------------以下为周相关--------------");

System.out.println("获得今日所在自然周的周一的日期;例如:" + getCurrentMonday());
System.out.println("获得今日所在自然周的周日的日期;例如:" + getCurrentSunday());

System.out.println("以当前日期为准,获取前N个周的周一;例如:" + getLastMonday(1));
System.out.println("以当前日期为准,获取前N个周的周日;例如:" + getLastSunday(1));

System.out.println("获取某个日期所在自然周的周一的日期;例如:" + getMondayByDate("2020-12-03"));
System.out.println("获取某个日期所在自然周的周日的日期;例如:" + getSundayByDate("2020-12-03"));

System.out.println("获取某个日期所在周的前N个周的周一;例如:" + getPreWeekMondayByDate("2020-12-03", 1));
System.out.println("获取某个日期所在周的前N个周的周日;例如:" + getPreWeekSundayByDate("2020-12-03", 1));

System.out.println("----------------以下为月相关--------------");

System.out.println("获得某个日期所在月的开始日期;例如:" + getMinMonthDate("2020-12-03"));
System.out.println("获得某个日期所在月的结束日期;例如:" + getMaxMonthDate("2020-12-03"));

System.out.println("获取某个日期所在的月的前month个月的开始日期;例如:" + getLastMinMonthDate("2020-12-03", 1));
System.out.println("获取某个日期所在的月的前month个月的结束日期;例如:" + getLastMaxMonthDate("2020-12-03", 1));

}
//-------------------------------------------------以下为周相关的处理------------------------------------------------------//

//注意:以下所有的自然周均指:每周第一天:周一;每周最后一天:周日

/**
* 获得今日所在自然周的周一的日期
*
* @return
*/
public static String getCurrentMonday() {
int mondayPlus = getMondayPlus(new Date());
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
}

/**
* 获得今日所在自然周的周日的日期
*
* @return
*/
public static String getCurrentSunday() {
int mondayPlus = getMondayPlus(new Date());
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
}

/**
* 以当前日期为准,获取前N个周的周一
*
* @param week
* @return
*/
public static String getLastMonday(int week) {
int mondayPlus = getMondayPlus(new Date());
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus);
currentDate.add(Calendar.SECOND, (-7 * 24 * 3600) * week);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
}

/**
* 以当前日期为准,获取前N个周的周日
*
* @return
*/
public static String getLastSunday(int week) {
int mondayPlus = getMondayPlus(new Date());
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
currentDate.add(Calendar.SECOND, (-7 * 24 * 3600) * week);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
}

/**
* 获取某个日期所在自然周的周一的日期
*
* @param date
* @return
*/
public static String getMondayByDate(String date) {
try {
Date requestDate = dateFormat.parse(date);
int mondayPlus = getMondayPlus(requestDate);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(requestDate);
currentDate.add(GregorianCalendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}

/**
* 获取某个日期所在自然周的周日的日期
*
* @param date
* @return
*/
public static String getSundayByDate(String date) {
try {
Date requestDate = dateFormat.parse(date);
int mondayPlus = getMondayPlus(requestDate);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(requestDate);
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}

/**
* 获取某个日期所在周的前N个周的周一
*
* @param date
* @param week
* @return
*/
public static String getPreWeekMondayByDate(String date, int week) {
try {
Date requestDate = dateFormat.parse(date);
int mondayPlus = getMondayPlus(requestDate);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(dateFormat.parse(date));
currentDate.add(Calendar.DATE, -7 * week);//获取当前时间上week个周
currentDate.add(GregorianCalendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}

/**
* 获取某个日期所在周的前N个周的周日
*
* @param date
* @param week
* @return
*/
public static String getPreWeekSundayByDate(String date, int week) {
try {
Date requestDate = dateFormat.parse(date);
int mondayPlus = getMondayPlus(requestDate);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(dateFormat.parse(date));
currentDate.add(Calendar.DATE, -7 * week);//获取当前时间上week个周
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
// DateFormat df = DateFormat.getDateInstance();
String preMonday = dateFormat.format(monday);
return preMonday;
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}

/**
* 获得某个日期所在的自然周的周一与该日期相差的天数
*
* @param date
* @return
*/
public static int getMondayPlus(Date date) {
Calendar cd = Calendar.getInstance();
cd.setTime(date);
int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK);
if (dayOfWeek == 1) {
return -6;
} else {
return 2 - dayOfWeek;
}
}

//------------------------------------------以下为月---------------------------------------------------------------//

/**
* 获得某个日期所在月的开始日期
*
* @param date
* @return
*/
public static String getMinMonthDate(String date) {
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(dateFormat.parse(date));
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
return dateFormat.format(calendar.getTime());
} catch (java.text.ParseException e) {
e.printStackTrace();
}
return null;
}

/**
* 获得某个日期所在月的结束日期
*
* @param date
* @return
*/
public static String getMaxMonthDate(String date) {
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(dateFormat.parse(date));
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
return dateFormat.format(calendar.getTime());
} catch (java.text.ParseException e) {
e.printStackTrace();
}
return null;
}

/**
* 获取某个日期所在的月的前month个月的开始日期
*
* @param date
* @param month
* @return
*/
public static String getLastMinMonthDate(String date, int month) {
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(dateFormat.parse(date));
calendar.add(Calendar.MONTH, -1 * month);//获取当前时间上month个月
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
return dateFormat.format(calendar.getTime());
} catch (java.text.ParseException e) {
e.printStackTrace();
}
return null;
}


/**
* 获取某个日期所在的月的前month个月的结束日期
*
* @param date
* @param month
* @return
*/
public static String getLastMaxMonthDate(String date, int month) {
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(dateFormat.parse(date));
calendar.add(Calendar.MONTH, -1 * month);//获取当前时间上month个月
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));

return dateFormat.format(calendar.getTime());
} catch (java.text.ParseException e) {
e.printStackTrace();
}
return null;
}

}