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Split the first 2 modules: java-dates-conversion and java-dates-string.

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This commit is contained in:
Alessio Stalla
2019-09-17 19:13:21 +02:00
parent 9154f5e062
commit ed9463faa1
62 changed files with 158 additions and 48 deletions
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39
java-dates/src/main/java/com/baeldung/datetolocaldate/DateToLocalDateConverter.java
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@@ -1,39 +0,0 @@
/**
*
*/
package com.baeldung.datetolocaldate;
import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Date;
/**
* Class which shows a way to convert java.util.Date into java.time.LocalDate.
*
* @author abialas
*
*/
public class DateToLocalDateConverter {
public static LocalDate convertToLocalDateViaInstant(Date dateToConvert) {
return dateToConvert.toInstant()
.atZone(ZoneId.systemDefault())
.toLocalDate();
}
public static LocalDate convertToLocalDateViaSqlDate(Date dateToConvert) {
return new java.sql.Date(dateToConvert.getTime()).toLocalDate();
}
public static LocalDate convertToLocalDateViaMilisecond(Date dateToConvert) {
return Instant.ofEpochMilli(dateToConvert.getTime())
.atZone(ZoneId.systemDefault())
.toLocalDate();
}
public static LocalDate convertToLocalDate(Date dateToConvert) {
return LocalDate.ofInstant(dateToConvert.toInstant(), ZoneId.systemDefault());
}
}

39
java-dates/src/main/java/com/baeldung/datetolocaldate/DateToLocalDateTimeConverter.java
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/**
*
*/
package com.baeldung.datetolocaldate;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;
/**
* Class which shows a way to convert java.util.Date into java.time.LocalDateTime.
*
* @author abialas
*
*/
public class DateToLocalDateTimeConverter {
public static LocalDateTime convertToLocalDateTimeViaInstant(Date dateToConvert) {
return dateToConvert.toInstant()
.atZone(ZoneId.systemDefault())
.toLocalDateTime();
}
public static LocalDateTime convertToLocalDateTimeViaSqlTimestamp(Date dateToConvert) {
return new java.sql.Timestamp(dateToConvert.getTime()).toLocalDateTime();
}
public static LocalDateTime convertToLocalDateTimeViaMilisecond(Date dateToConvert) {
return Instant.ofEpochMilli(dateToConvert.getTime())
.atZone(ZoneId.systemDefault())
.toLocalDateTime();
}
public static LocalDateTime convertToLocalDateTime(Date dateToConvert) {
return LocalDateTime.ofInstant(dateToConvert.toInstant(), ZoneId.systemDefault());
}
}

27
java-dates/src/main/java/com/baeldung/datetolocaldate/LocalDateTimeToDateConverter.java
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@@ -1,27 +0,0 @@
/**
*
*/
package com.baeldung.datetolocaldate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;
/**
* Class which shows different ways of converting java.time.LocalDateTime into java.util.Date.
*
* @author abialas
*
*/
public class LocalDateTimeToDateConverter {
public static Date convertToDateViaSqlTimestamp(LocalDateTime dateToConvert) {
return java.sql.Timestamp.valueOf(dateToConvert);
}
public static Date convertToDateViaInstant(LocalDateTime dateToConvert) {
return java.util.Date.from(dateToConvert.atZone(ZoneId.systemDefault())
.toInstant());
}
}

28
java-dates/src/main/java/com/baeldung/datetolocaldate/LocalDateToDateConverter.java
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@@ -1,28 +0,0 @@
/**
*
*/
package com.baeldung.datetolocaldate;
import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Date;
/**
* Class which shows different ways of converting java.time.LocalDate into java.util.Date.
*
* @author abialas
*
*/
public class LocalDateToDateConverter {
public static Date convertToDateViaSqlDate(LocalDate dateToConvert) {
return java.sql.Date.valueOf(dateToConvert);
}
public static Date convertToDateViaInstant(LocalDate dateToConvert) {
return java.util.Date.from(dateToConvert.atStartOfDay()
.atZone(ZoneId.systemDefault())
.toInstant());
}
}

7
java-dates/src/main/java/com/baeldung/regexp/datepattern/DateMatcher.java
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@@ -1,7 +0,0 @@
package com.baeldung.regexp.datepattern;
public interface DateMatcher {
boolean matches(String date);
}

14
java-dates/src/main/java/com/baeldung/regexp/datepattern/FormattedDateMatcher.java
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@@ -1,14 +0,0 @@
package com.baeldung.regexp.datepattern;
import java.util.regex.Pattern;
class FormattedDateMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^\\d{4}-\\d{2}-\\d{2}$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

14
java-dates/src/main/java/com/baeldung/regexp/datepattern/RangedDateMatcher.java
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@@ -1,14 +0,0 @@
package com.baeldung.regexp.datepattern;
import java.util.regex.Pattern;
class RangedDateMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^((19|2[0-9])[0-9]{2})-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

16
java-dates/src/main/java/com/baeldung/regexp/datepattern/gregorian/February29thMatcher.java
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@@ -1,16 +0,0 @@
package com.baeldung.regexp.datepattern.gregorian;
import com.baeldung.regexp.datepattern.DateMatcher;
import java.util.regex.Pattern;
public class February29thMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

16
java-dates/src/main/java/com/baeldung/regexp/datepattern/gregorian/FebruaryGeneralMatcher.java
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@@ -1,16 +0,0 @@
package com.baeldung.regexp.datepattern.gregorian;
import com.baeldung.regexp.datepattern.DateMatcher;
import java.util.regex.Pattern;
public class FebruaryGeneralMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

19
java-dates/src/main/java/com/baeldung/regexp/datepattern/gregorian/GregorianDateMatcher.java
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@@ -1,19 +0,0 @@
package com.baeldung.regexp.datepattern.gregorian;
import com.baeldung.regexp.datepattern.DateMatcher;
import java.util.regex.Pattern;
class GregorianDateMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)$"
+ "|^(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))$"
+ "|^(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))$"
+ "|^(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30))$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

17
java-dates/src/main/java/com/baeldung/regexp/datepattern/gregorian/MonthsOf30DaysMatcher.java
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@@ -1,17 +0,0 @@
package com.baeldung.regexp.datepattern.gregorian;
import com.baeldung.regexp.datepattern.DateMatcher;
import java.util.regex.Pattern;
public class MonthsOf30DaysMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30))$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

17
java-dates/src/main/java/com/baeldung/regexp/datepattern/gregorian/MonthsOf31DaysMatcher.java
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@@ -1,17 +0,0 @@
package com.baeldung.regexp.datepattern.gregorian;
import com.baeldung.regexp.datepattern.DateMatcher;
import java.util.regex.Pattern;
public class MonthsOf31DaysMatcher implements DateMatcher {
private static final Pattern DATE_PATTERN = Pattern.compile(
"^(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))$");
@Override
public boolean matches(String date) {
return DATE_PATTERN.matcher(date).matches();
}
}

6
java-dates/src/main/java/com/baeldung/regexp/datepattern/optmization/OptimizedMatcher.java
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@@ -1,6 +0,0 @@
package com.baeldung.regexp.datepattern.optmization;
public class OptimizedMatcher {
}

55
java-dates/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplay.java
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@@ -1,55 +0,0 @@
package com.baeldung.timezonedisplay;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
public class TimezoneDisplay {
public enum OffsetBase {
GMT, UTC
}
public List<String> getTimeZoneList(OffsetBase base) {
Set<String> availableZoneIds = ZoneId.getAvailableZoneIds();
LocalDateTime now = LocalDateTime.now();
return availableZoneIds
.stream()
.map(ZoneId::of)
.sorted(new ZoneComparator())
.map(id -> String.format("(%s%s) %s", base, getOffset(now, id), id.getId()))
.collect(Collectors.toList());
}
private String getOffset(LocalDateTime dateTime, ZoneId id) {
return dateTime
.atZone(id)
.getOffset()
.getId()
.replace("Z", "+00:00");
}
private class ZoneComparator implements Comparator<ZoneId> {
@Override
public int compare(ZoneId zoneId1, ZoneId zoneId2) {
LocalDateTime now = LocalDateTime.now();
ZoneOffset offset1 = now
.atZone(zoneId1)
.getOffset();
ZoneOffset offset2 = now
.atZone(zoneId2)
.getOffset();
return offset1.compareTo(offset2);
}
}
}

18
java-dates/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayApp.java
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@@ -1,18 +0,0 @@
package com.baeldung.timezonedisplay;
import java.util.List;
public class TimezoneDisplayApp {
public static void main(String... args) {
TimezoneDisplay display = new TimezoneDisplay();
System.out.println("Time zones in UTC:");
List<String> utc = display.getTimeZoneList(TimezoneDisplay.OffsetBase.UTC);
utc.forEach(System.out::println);
System.out.println("Time zones in GMT:");
List<String> gmt = display.getTimeZoneList(TimezoneDisplay.OffsetBase.GMT);
gmt.forEach(System.out::println);
}
}

43
java-dates/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayJava7.java
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@@ -1,43 +0,0 @@
package com.baeldung.timezonedisplay;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
public class TimezoneDisplayJava7 {
public enum OffsetBase {
GMT, UTC
}
public List<String> getTimeZoneList(TimezoneDisplayJava7.OffsetBase base) {
String[] availableZoneIds = TimeZone.getAvailableIDs();
List<String> result = new ArrayList<>(availableZoneIds.length);
for (String zoneId : availableZoneIds) {
TimeZone curTimeZone = TimeZone.getTimeZone(zoneId);
String offset = calculateOffset(curTimeZone.getRawOffset());
result.add(String.format("(%s%s) %s", base, offset, zoneId));
}
Collections.sort(result);
return result;
}
private String calculateOffset(int rawOffset) {
if (rawOffset == 0) {
return "+00:00";
}
long hours = TimeUnit.MILLISECONDS.toHours(rawOffset);
long minutes = TimeUnit.MILLISECONDS.toMinutes(rawOffset);
minutes = Math.abs(minutes - TimeUnit.HOURS.toMinutes(hours));
return String.format("%+03d:%02d", hours, Math.abs(minutes));
}
}

23
java-dates/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayJava7App.java
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@@ -1,23 +0,0 @@
package com.baeldung.timezonedisplay;
import java.util.List;
public class TimezoneDisplayJava7App {
public static void main(String... args) {
TimezoneDisplayJava7 display = new TimezoneDisplayJava7();
System.out.println("Time zones in UTC:");
List<String> utc = display.getTimeZoneList(TimezoneDisplayJava7.OffsetBase.UTC);
for (String timeZone : utc) {
System.out.println(timeZone);
}
System.out.println("Time zones in GMT:");
List<String> gmt = display.getTimeZoneList(TimezoneDisplayJava7.OffsetBase.GMT);
for (String timeZone : gmt) {
System.out.println(timeZone);
}
}
}

13
java-dates/src/main/java/com/baeldung/zoneddatetime/OffsetDateTimeExample.java
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@@ -1,13 +0,0 @@
package com.baeldung.zoneddatetime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
public class OffsetDateTimeExample {
public OffsetDateTime getCurrentTimeByZoneOffset(String offset) {
ZoneOffset zoneOffSet= ZoneOffset.of(offset);
OffsetDateTime date = OffsetDateTime.now(zoneOffSet);
return date;
}
}

13
java-dates/src/main/java/com/baeldung/zoneddatetime/OffsetTimeExample.java
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@@ -1,13 +0,0 @@
package com.baeldung.zoneddatetime;
import java.time.OffsetTime;
import java.time.ZoneOffset;
public class OffsetTimeExample {
public OffsetTime getCurrentTimeByZoneOffset(String offset) {
ZoneOffset zoneOffSet = ZoneOffset.of(offset);
OffsetTime time = OffsetTime.now(zoneOffSet);
return time;
}
}

21
java-dates/src/main/java/com/baeldung/zoneddatetime/ZoneDateTimeExample.java
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@@ -1,21 +0,0 @@
package com.baeldung.zoneddatetime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class ZoneDateTimeExample {
public ZonedDateTime getCurrentTimeByZoneId(String region) {
ZoneId zone = ZoneId.of(region);
ZonedDateTime date = ZonedDateTime.now(zone);
return date;
}
public ZonedDateTime convertZonedDateTime(ZonedDateTime sourceDate, String destZone) {
ZoneId destZoneId = ZoneId.of(destZone);
ZonedDateTime destDate = sourceDate.withZoneSameInstant(destZoneId);
return destDate;
}
}