iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BAEL-3912 - Java: Get week number from any date?

This commit is contained in:
Jonathan Cook 2020-06-14 10:44:59 +02:00
parent 754e7f3d49
commit 9c9064cdb3
5 changed files with 64 additions and 159 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
core-java-modules/core-java-date-operations-2/src/main/java/com/baeldung/weeknumber/WeekNumberUsingCalendar.java
View File

@ -1,37 +0,0 @@
package com.baeldung.weeknumber;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
public class WeekNumberUsingCalendar {
public int getWeekNumberFrom(String dateString, String dateFormat, Locale locale) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
Date date = sdf.parse(dateString);
Calendar calendar = Calendar.getInstance(locale);
calendar.setTime(date);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
public int getWeekNumberFrom(int year, int month, int day, Locale locale) {
Calendar calendar = Calendar.getInstance(locale);
calendar.set(year, month, day);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
public int getWeekNumberFrom(int year, int month, int day, int firstDayOfWeek, int minimalDaysInFirstWeek) {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(firstDayOfWeek);
calendar.setMinimalDaysInFirstWeek(minimalDaysInFirstWeek);
calendar.set(year, month, day);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
}

30
core-java-modules/core-java-date-operations-2/src/main/java/com/baeldung/weeknumber/WeekNumberUsingLocalDate.java
View File

@ -1,30 +0,0 @@
package com.baeldung.weeknumber;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoField;
import java.time.temporal.WeekFields;
import java.util.Locale;
public class WeekNumberUsingLocalDate {
public Integer getWeekNumberUsingWeekFiedsFrom(String day, String dayFormat, Locale locale) {
LocalDate date = LocalDate.parse(day, DateTimeFormatter.ofPattern(dayFormat));
return date.get(WeekFields.of(locale)
.weekOfYear());
}
public Integer getWeekNumberUsingWeekFieldsFrom(int year, int month, int day, Locale locale) {
LocalDate date = LocalDate.of(year, month, day);
return date.get(WeekFields.of(locale)
.weekOfYear());
}
public Integer getWeekNumberUsingChronoFieldFrom(int year, int month, int day) {
LocalDate date = LocalDate.of(year, month, day);
return date.get(ChronoField.ALIGNED_WEEK_OF_YEAR);
}
}

64
core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/weeknumber/GetWeekNumberUnitTest.java Normal file
View File

@ -0,0 +1,64 @@
package com.baeldung.weeknumber;
import static org.junit.Assert.assertEquals;
import java.time.LocalDate;
import java.time.temporal.ChronoField;
import java.time.temporal.WeekFields;
import java.util.Calendar;
import java.util.Locale;
import org.junit.Test;
public class GetWeekNumberUnitTest {
@Test
public void givenDateUsingFieldsAndLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
Calendar calendar = Calendar.getInstance(Locale.ITALY);
calendar.set(2020, 10, 22);
assertEquals(47, calendar.get(Calendar.WEEK_OF_YEAR));
}
@Test
public void givenDateUsingFieldsAndLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
Calendar calendar = Calendar.getInstance(Locale.CANADA);
calendar.set(2020, 10, 22);
assertEquals(48, calendar.get(Calendar.WEEK_OF_YEAR));
}
@Test
public void givenDateUsingFieldsAndLocaleItaly_whenChangingWeekCalcSettings_thenWeekIsReturnedCorrectly() {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(Calendar.SUNDAY);
calendar.setMinimalDaysInFirstWeek(4);
calendar.set(2020, 2, 22);
assertEquals(13, calendar.get(Calendar.WEEK_OF_YEAR));
}
@Test
public void givenDateUsingChronoFields_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
LocalDate date = LocalDate.of(2020, 3, 22);
assertEquals(12, date.get(ChronoField.ALIGNED_WEEK_OF_YEAR));
}
@Test
public void givenDateUsingFieldsWithLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
LocalDate date = LocalDate.of(2020, 3, 22);
assertEquals(12, date.get(WeekFields.of(Locale.ITALY)
.weekOfYear()));
}
@Test
public void givenDateUsingFieldsWithLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
LocalDate date = LocalDate.of(2020, 3, 22);
assertEquals(13, date.get(WeekFields.of(Locale.CANADA)
.weekOfYear()));
}
}

48
core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/weeknumber/WeekNumberUsingCalendarUnitTest.java
View File

@ -1,48 +0,0 @@
package com.baeldung.weeknumber;
import static org.junit.Assert.assertEquals;
import java.text.ParseException;
import java.util.Calendar;
import java.util.Locale;
import org.junit.Test;
public class WeekNumberUsingCalendarUnitTest {
@Test
public void givenDateFormatAndLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() throws ParseException {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(12, calendar.getWeekNumberFrom("20200322", "yyyyMMdd", Locale.ITALY));
}
@Test
public void givenDateFormatAndLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() throws ParseException {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom("20200322", "yyyyMMdd", Locale.CANADA));
}
@Test
public void givenDateUsingFieldsAndLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(12, calendar.getWeekNumberFrom(2020, 2, 22, Locale.ITALY));
}
@Test
public void givenDateUsingFieldsAndLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom(2020, 2, 22, Locale.CANADA));
}
@Test
public void givenDateUsingFieldsAndLocaleItaly_whenChangingWeekCalcSettings_thenWeekIsReturnedCorrectly() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom(2020, 2, 22, Calendar.SUNDAY, 4));
}
}

44
core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/weeknumber/WeekNumberUsingLocalDateUnitTest.java
View File

@ -1,44 +0,0 @@
package com.baeldung.weeknumber;
import static org.junit.Assert.assertEquals;
import java.util.Locale;
import org.junit.Test;
public class WeekNumberUsingLocalDateUnitTest {
@Test
public void givenDateFormatAndLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(Integer.valueOf(12), localDate.getWeekNumberUsingWeekFiedsFrom("20200322", "yyyyMMdd", Locale.ITALY));
}
@Test
public void givenDateFormatAndLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(Integer.valueOf(13), localDate.getWeekNumberUsingWeekFiedsFrom("20200322", "yyyyMMdd", Locale.CANADA));
}
@Test
public void givenDateUsingChronoFields_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(Integer.valueOf(12), localDate.getWeekNumberUsingChronoFieldFrom(2020, 3, 22));
}
@Test
public void givenDateUsingFieldsWithLocaleItaly_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(Integer.valueOf(12), localDate.getWeekNumberUsingWeekFieldsFrom(2020, 3, 22, Locale.ITALY));
}
@Test
public void givenDateUsingFieldsWithLocaleCanada_whenGetWeekNumber_thenWeekIsReturnedCorrectly() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(Integer.valueOf(13), localDate.getWeekNumberUsingWeekFieldsFrom(2020, 3, 22, Locale.CANADA));
}
}