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#BAEL-16646 flatten java-datetime modules

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This commit is contained in:
Alessio Stalla
2019-10-04 21:47:42 +02:00
parent d2b96ee409
commit 1b5d8a6b62
62 changed files with 2 additions and 26 deletions
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26
core-java-modules/core-java-datetime-conversion/.gitignore vendored Normal file
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*.class
0.*
#folders#
/target
/neoDb*
/data
/src/main/webapp/WEB-INF/classes
*/META-INF/*
.resourceCache
# Packaged files #
*.jar
*.war
*.ear
# Files generated by integration tests
*.txt
backup-pom.xml
/bin/
/temp
#IntelliJ specific
.idea/
*.iml

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core-java-modules/core-java-datetime-conversion/README.md Normal file
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## Java Date/time conversion Cookbooks and Examples
This module contains articles about converting between Java date and time objects.
### Relevant Articles:
- [Converting Between LocalDate and XMLGregorianCalendar](https://www.baeldung.com/java-localdate-to-xmlgregoriancalendar)
- [Convert Time to Milliseconds in Java](https://www.baeldung.com/java-time-milliseconds)
- [Convert Date to LocalDate or LocalDateTime and Back](http://www.baeldung.com/java-date-to-localdate-and-localdatetime)
- [Convert Between java.time.Instant and java.sql.Timestamp](https://www.baeldung.com/java-time-instant-to-java-sql-timestamp)

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core-java-modules/core-java-datetime-conversion/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>java-dates-conversion</artifactId>
<version>${project.parent.version}</version>
<name>java-dates-conversion</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../../parent-java</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>java-dates-conversion</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<joda-time.version>2.10</joda-time.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
</properties>
</project>

39
core-java-modules/core-java-datetime-conversion/src/main/java/com/baeldung/datetolocaldate/DateToLocalDateConverter.java Normal file
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/**
*
*/
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
core-java-modules/core-java-datetime-conversion/src/main/java/com/baeldung/datetolocaldate/DateToLocalDateTimeConverter.java Normal file
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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
core-java-modules/core-java-datetime-conversion/src/main/java/com/baeldung/datetolocaldate/LocalDateTimeToDateConverter.java Normal file
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/**
*
*/
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
core-java-modules/core-java-datetime-conversion/src/main/java/com/baeldung/datetolocaldate/LocalDateToDateConverter.java Normal file
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/**
*
*/
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());
}
}

59
core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/convert/ConvertDateTimeUnitTest.java Normal file
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package com.baeldung.convert;
import org.joda.time.Instant;
import org.junit.Assert;
import org.junit.Test;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Calendar;
import java.util.Date;
public class ConvertDateTimeUnitTest {
public final long millis = 1556175797428L;
@Test
public void givenLocalDateTime_WhenToEpochMillis_ThenMillis() {
ZoneId id = ZoneId.systemDefault();
LocalDateTime localDateTime =
LocalDateTime.ofInstant(java.time.Instant.ofEpochMilli(millis), id);
ZonedDateTime zdt = ZonedDateTime.of(localDateTime, id);
Assert.assertEquals(millis, zdt.toInstant().toEpochMilli());
}
@Test
public void givenJava8Instant_WhenGToEpochMillis_ThenMillis() {
java.time.Instant instant = java.time.Instant.ofEpochMilli(millis);
Assert.assertEquals(millis, instant.toEpochMilli());
}
@Test
public void givenDate_WhenGetTime_ThenMillis() {
Date date = new Date(millis);
Assert.assertEquals(millis, date.getTime());
}
@Test
public void givenCalendar_WhenGetTimeInMillis_ThenMillis() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date(millis));
Assert.assertEquals(millis, calendar.getTimeInMillis());
}
@Test
public void givenJodaInstant_WhenGetMillis_ThenMillis() {
Instant jodaInstant = Instant.ofEpochMilli(millis);
Assert.assertEquals(millis, jodaInstant.getMillis());
}
@Test
public void givenJODADateTime_WhenGetMillis_ThenMillis() {
org.joda.time.DateTime jodaDateTime = new org.joda.time.DateTime(millis);
Assert.assertEquals(millis, jodaDateTime.getMillis());
}
}

29
core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/datetime/ConvertInstantToTimestampUnitTest.java Normal file
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package com.baeldung.datetime;
import org.junit.Test;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.util.TimeZone;
import static org.assertj.core.api.Assertions.assertThat;
public class ConvertInstantToTimestampUnitTest {
@Test
public void givenInstant_whenConvertedToTimestamp_thenGetTimestampWithSamePointOnTimeline() {
Instant instant = Instant.now();
Timestamp timestamp = Timestamp.from(instant); // same point on the time-line as Instant
assertThat(instant.toEpochMilli()).isEqualTo(timestamp.getTime());
instant = timestamp.toInstant();
assertThat(instant.toEpochMilli()).isEqualTo(timestamp.getTime());
DateFormat df = DateFormat.getDateTimeInstance();
df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SS'Z'");
df.setTimeZone(TimeZone.getTimeZone("UTC"));
assertThat(instant.toString()).isEqualTo(df.format(timestamp).toString());
}
}

89
core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/datetolocaldate/DateToLocalDateConverterUnitTest.java Normal file
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/**
*
*/
package com.baeldung.datetolocaldate;
import static org.junit.Assert.assertEquals;
import java.time.LocalDate;
import java.time.temporal.ChronoField;
import java.util.Calendar;
import java.util.Date;
import org.junit.Test;
import com.baeldung.datetolocaldate.DateToLocalDateConverter;
/**
* JUnits for {@link DateToLocalDateConverter} class.
*
* @author abialas
*
*/
public class DateToLocalDateConverterUnitTest {
@Test
public void shouldReturn10thNovember2010WhenConvertViaInstant() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10);
Date dateToConvert = calendar.getTime();
// when
LocalDate localDate = DateToLocalDateConverter.convertToLocalDateViaInstant(dateToConvert);
// then
assertEquals(2010, localDate.get(ChronoField.YEAR));
assertEquals(11, localDate.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDate.get(ChronoField.DAY_OF_MONTH));
}
@Test
public void shouldReturn10thNovember2010WhenConvertViaMiliseconds() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10);
Date dateToConvert = calendar.getTime();
// when
LocalDate localDate = DateToLocalDateConverter.convertToLocalDateViaMilisecond(dateToConvert);
// then
assertEquals(2010, localDate.get(ChronoField.YEAR));
assertEquals(11, localDate.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDate.get(ChronoField.DAY_OF_MONTH));
}
@Test
public void shouldReturn10thNovember2010WhenConvertViaSqlDate() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10);
Date dateToConvert = calendar.getTime();
// when
LocalDate localDate = DateToLocalDateConverter.convertToLocalDateViaSqlDate(dateToConvert);
// then
assertEquals(2010, localDate.get(ChronoField.YEAR));
assertEquals(11, localDate.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDate.get(ChronoField.DAY_OF_MONTH));
}
@Test
public void shouldReturn10thNovember2010WhenConvertToLocalDate() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10);
Date dateToConvert = calendar.getTime();
// when
LocalDate localDateTime = DateToLocalDateConverter.convertToLocalDate(dateToConvert);
// then
assertEquals(2010, localDateTime.get(ChronoField.YEAR));
assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
}
}

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core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/datetolocaldate/DateToLocalDateTimeConverterUnitTest.java Normal file
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/**
*
*/
package com.baeldung.datetolocaldate;
import static org.junit.Assert.assertEquals;
import java.time.LocalDateTime;
import java.time.temporal.ChronoField;
import java.util.Calendar;
import java.util.Date;
import org.junit.Test;
import com.baeldung.datetolocaldate.DateToLocalDateTimeConverter;
/**
* JUnits for {@link DateToLocalDateTimeConverter} class.
*
* @author abialas
*
*/
public class DateToLocalDateTimeConverterUnitTest {
@Test
public void shouldReturn10thNovember2010time8hour20minWhenConvertViaInstant() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10, 8, 20);
Date dateToConvert = calendar.getTime();
// when
LocalDateTime localDateTime = DateToLocalDateTimeConverter.convertToLocalDateTimeViaInstant(dateToConvert);
// then
assertEquals(2010, localDateTime.get(ChronoField.YEAR));
assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
assertEquals(8, localDateTime.get(ChronoField.HOUR_OF_DAY));
assertEquals(20, localDateTime.get(ChronoField.MINUTE_OF_HOUR));
}
@Test
public void shouldReturn10thNovember2010time8hour20minWhenConvertViaMiliseconds() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10, 8, 20);
Date dateToConvert = calendar.getTime();
// when
LocalDateTime localDateTime = DateToLocalDateTimeConverter.convertToLocalDateTimeViaMilisecond(dateToConvert);
// then
assertEquals(2010, localDateTime.get(ChronoField.YEAR));
assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
assertEquals(8, localDateTime.get(ChronoField.HOUR_OF_DAY));
assertEquals(20, localDateTime.get(ChronoField.MINUTE_OF_HOUR));
}
@Test
public void shouldReturn10thNovember2010time8hour20minWhenConvertViaSqlTimestamp() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10, 8, 20);
Date dateToConvert = calendar.getTime();
// when
LocalDateTime localDateTime = DateToLocalDateTimeConverter.convertToLocalDateTimeViaSqlTimestamp(dateToConvert);
// then
assertEquals(2010, localDateTime.get(ChronoField.YEAR));
assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
assertEquals(8, localDateTime.get(ChronoField.HOUR_OF_DAY));
assertEquals(20, localDateTime.get(ChronoField.MINUTE_OF_HOUR));
}
@Test
public void shouldReturn10thNovember2010time8hour20minWhenConvertToLocalDateTime() {
// given
Calendar calendar = Calendar.getInstance();
calendar.set(2010, 10, 10, 8, 20);
Date dateToConvert = calendar.getTime();
// when
LocalDateTime localDateTime = DateToLocalDateTimeConverter.convertToLocalDateTime(dateToConvert);
// then
assertEquals(2010, localDateTime.get(ChronoField.YEAR));
assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
assertEquals(8, localDateTime.get(ChronoField.HOUR_OF_DAY));
assertEquals(20, localDateTime.get(ChronoField.MINUTE_OF_HOUR));
}
}

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core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/datetolocaldate/LocalDateTimeToDateConverterUnitTest.java Normal file
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/**
*
*/
package com.baeldung.datetolocaldate;
import static org.junit.Assert.assertEquals;
import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Date;
import org.junit.Test;
import com.baeldung.datetolocaldate.LocalDateTimeToDateConverter;
/**
*
* JUnits for {@link LocalDateTimeToDateConverter} class.
*
* @author abialas
*
*/
public class LocalDateTimeToDateConverterUnitTest {
@Test
public void shouldReturn10thNovember2010time8hour20minWhenConvertViaInstant() {
// given
LocalDateTime dateToConvert = LocalDateTime.of(2010, 11, 10, 8, 20);
// when
Date date = LocalDateTimeToDateConverter.convertToDateViaInstant(dateToConvert);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
// then
assertEquals(2010, calendar.get(Calendar.YEAR));
assertEquals(10, calendar.get(Calendar.MONTH));
assertEquals(10, calendar.get(Calendar.DAY_OF_MONTH));
assertEquals(8, calendar.get(Calendar.HOUR));
assertEquals(20, calendar.get(Calendar.MINUTE));
assertEquals(0, calendar.get(Calendar.SECOND));
}
@Test
public void shouldReturn10thNovember2010WhenConvertViaSqlTimestamp() {
// given
LocalDateTime dateToConvert = LocalDateTime.of(2010, 11, 10, 8, 20);
// when
Date date = LocalDateTimeToDateConverter.convertToDateViaSqlTimestamp(dateToConvert);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
// then
assertEquals(2010, calendar.get(Calendar.YEAR));
assertEquals(10, calendar.get(Calendar.MONTH));
assertEquals(10, calendar.get(Calendar.DAY_OF_MONTH));
assertEquals(8, calendar.get(Calendar.HOUR));
assertEquals(20, calendar.get(Calendar.MINUTE));
assertEquals(0, calendar.get(Calendar.SECOND));
}
}

57
core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/datetolocaldate/LocalDateToDateConverterUnitTest.java Normal file
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/**
*
*/
package com.baeldung.datetolocaldate;
import static org.junit.Assert.assertEquals;
import java.time.LocalDate;
import java.util.Calendar;
import java.util.Date;
import org.junit.Test;
import com.baeldung.datetolocaldate.LocalDateToDateConverter;
/**
*
* JUnits for {@link LocalDateToDateConverter} class.
*
* @author abialas
*
*/
public class LocalDateToDateConverterUnitTest {
@Test
public void shouldReturn10thNovember2010WhenConvertViaInstant() {
// given
LocalDate dateToConvert = LocalDate.of(2010, 11, 10);
// when
Date date = LocalDateToDateConverter.convertToDateViaInstant(dateToConvert);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
// then
assertEquals(2010, calendar.get(Calendar.YEAR));
assertEquals(10, calendar.get(Calendar.MONTH));
assertEquals(10, calendar.get(Calendar.DAY_OF_MONTH));
}
@Test
public void shouldReturn10thNovember2010WhenConvertViaSqlDate() {
// given
LocalDate dateToConvert = LocalDate.of(2010, 11, 10);
// when
Date date = LocalDateToDateConverter.convertToDateViaSqlDate(dateToConvert);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
// then
assertEquals(2010, calendar.get(Calendar.YEAR));
assertEquals(10, calendar.get(Calendar.MONTH));
assertEquals(10, calendar.get(Calendar.DAY_OF_MONTH));
}
}

36
core-java-modules/core-java-datetime-conversion/src/test/java/com/baeldung/xmlgregoriancalendar/XmlGregorianCalendarConverterUnitTest.java Normal file
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package com.baeldung.xmlgregoriancalendar;
import org.junit.Test;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import java.time.LocalDate;
import static org.assertj.core.api.Assertions.assertThat;
public class XmlGregorianCalendarConverterUnitTest {
@Test
public void fromLocalDateToXMLGregorianCalendar() throws DatatypeConfigurationException {
LocalDate localDate = LocalDate.of(2017, 4, 25);
XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory.newInstance().newXMLGregorianCalendar(localDate.toString());
assertThat(xmlGregorianCalendar.getYear()).isEqualTo(localDate.getYear());
assertThat(xmlGregorianCalendar.getMonth()).isEqualTo(localDate.getMonthValue());
assertThat(xmlGregorianCalendar.getDay()).isEqualTo(localDate.getDayOfMonth());
assertThat(xmlGregorianCalendar.getTimezone()).isEqualTo(DatatypeConstants.FIELD_UNDEFINED);
}
@Test
public void fromXMLGregorianCalendarToLocalDate() throws DatatypeConfigurationException {
XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory.newInstance().newXMLGregorianCalendar("2017-04-25");
LocalDate localDate = LocalDate.of(xmlGregorianCalendar.getYear(), xmlGregorianCalendar.getMonth(), xmlGregorianCalendar.getDay());
assertThat(localDate.getYear()).isEqualTo(xmlGregorianCalendar.getYear());
assertThat(localDate.getMonthValue()).isEqualTo(xmlGregorianCalendar.getMonth());
assertThat(localDate.getDayOfMonth()).isEqualTo(xmlGregorianCalendar.getDay());
}
}