.idea/compiler.xml

@@ -33,6 +33,7 @@
         <module name="core-java-streams" />
         <module name="core-java-io-2" />
         <module name="core-java-io" />
+        <module name="core-java-8-datetime" />
         <module name="discourse" />
         <module name="image-processing" />
         <module name="jackson-jr" />

.idea/encodings.xml

@@ -15,6 +15,8 @@
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-11/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-2/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-datetime/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-datetime/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java-9/src/main/java" charset="UTF-8" />

core-java-modules/core-java-8-datetime/README.md

@@ -1,13 +1,13 @@
-## Java 8+ Date and Time API 
+## Java 8+ Date 和 Time API 
 
-This module contains articles about the Date and Time API introduced with Java 8.
+本模块中包含的内容有关 Java 8 中使用日期和时间的 API。
 
-### Relevant Articles: 
+### 相关文章： 
 - [Introduction to the Java 8 Date/Time API](http://www.baeldung.com/java-8-date-time-intro)
 - [Migrating to the New Java 8 Date Time API](http://www.baeldung.com/migrating-to-java-8-date-time-api)
 - [Get the Current Date and Time in Java](https://www.baeldung.com/current-date-time-and-timestamp-in-java-8)
 - [TemporalAdjuster in Java](http://www.baeldung.com/java-temporal-adjuster)
-- [ZoneOffset in Java](https://www.baeldung.com/java-zone-offset)
+- [Java 中的 ZoneOffset](https://www.isharkfly.com/t/java-zoneoffset/16803)
 - [Differences Between ZonedDateTime and OffsetDateTime](https://www.baeldung.com/java-zoneddatetime-offsetdatetime)
 - [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
 - [How to Get the Start and the End of a Day using Java](http://www.baeldung.com/java-day-start-end)

core-java-modules/core-java-8-datetime/pom.xml

@@ -8,9 +8,9 @@
     <name>core-java-8-datetime</name>
 
     <parent>
-        <groupId>com.baeldung.core-java-modules</groupId>
+        <groupId>com.ossez.core-java-modules</groupId>
         <artifactId>core-java-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>0.0.2-SNAPSHOT</version>
     </parent>
 
     <dependencies>

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/CalendarUtils.java

@@ -0,0 +1,14 @@
+package com.baeldung.datetime;
+
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.Date;
+
+public class CalendarUtils {
+    public static Calendar getPlusDays(Date date, int amount) throws ParseException {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+        calendar.add(Calendar.DAY_OF_YEAR, amount);
+        return calendar;
+    }
+}

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/DateUtils.java

@@ -0,0 +1,19 @@
+package com.baeldung.datetime;
+
+import java.text.SimpleDateFormat;
+import java.text.ParseException;
+import java.util.Date;
+public class DateUtils {
+
+    public static Date getNow() {
+        return new Date();
+    }
+
+    public static Date getDate(long millis) {
+        return new Date(millis);
+    }
+
+    public static Date getDate(String dateAsString, String pattern) throws ParseException {
+        return new SimpleDateFormat(pattern).parse(dateAsString);
+    }
+}

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/UseSimpleDateFormat.java

@@ -0,0 +1,15 @@
+package com.baeldung.datetime;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+public class UseSimpleDateFormat {
+
+    public String useFormat() {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");
+        sdf.setTimeZone(TimeZone.getTimeZone("Asia/Kolkata"));
+        Date date = new Date(1725437542000L);
+        return sdf.format(date);
+    }
+}

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/sql/DateUtils.java

@@ -0,0 +1,21 @@
+package com.baeldung.datetime.sql;
+
+import java.sql.Date;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+
+public class DateUtils {
+
+    public static Date getNow() {
+        return new Date(System.currentTimeMillis());
+    }
+
+    public static Date getDate(String dateAsString) {
+        return Date.valueOf(dateAsString);
+    }
+
+    public static Date getDate(String dateAsString, String pattern) throws ParseException {
+        java.util.Date customUtilDate = new SimpleDateFormat(pattern).parse(dateAsString);
+        return new Date(customUtilDate.getTime());
+    }
+}

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/sql/TimeUtils.java

@@ -0,0 +1,21 @@
+package com.baeldung.datetime.sql;
+
+import java.sql.Time;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+
+public class TimeUtils {
+
+    public static Time getNow() {
+        return new Time(System.currentTimeMillis());
+    }
+
+    public static Time getTime(String timeAsString) {
+        return Time.valueOf(timeAsString);
+    }
+
+    public static Time getTime(String dateAsString, String pattern) throws ParseException {
+        java.util.Date customUtilDate = new SimpleDateFormat(pattern).parse(dateAsString);
+        return new Time(customUtilDate.getTime());
+    }
+}

core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/sql/TimestampUtils.java

@@ -0,0 +1,21 @@
+package com.baeldung.datetime.sql;
+
+import java.sql.Timestamp;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+
+public class TimestampUtils {
+
+    public static Timestamp getNow() {
+        return new Timestamp(System.currentTimeMillis());
+    }
+
+    public static Timestamp getTimestamp(String timestampAsString) {
+        return Timestamp.valueOf(timestampAsString);
+    }
+
+    public static Timestamp getTimestamp(String dateAsString, String pattern) throws ParseException {
+        java.util.Date customUtilDate = new SimpleDateFormat(pattern).parse(dateAsString);
+        return new Timestamp(customUtilDate.getTime());
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/CalendarUtilsUnitTest.java

@@ -0,0 +1,18 @@
+package com.baeldung.datetime;
+
+import org.junit.Test;
+
+import java.text.ParseException;
+import java.util.Date;
+
+import static org.junit.Assert.assertEquals;
+
+public class CalendarUtilsUnitTest {
+
+    @Test
+    public void givenDateAndDaysToAdd_thenCalendarIsCorrectlyReturned() throws ParseException {
+        Date initialDate = DateUtils.getDate("2020/01/01", "yyyy/MM/dd");
+        Date expectedDate= DateUtils.getDate("2020/01/11", "yyyy/MM/dd");
+        assertEquals(expectedDate, CalendarUtils.getPlusDays(initialDate, 10).getTime());
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/DateUtilsUnitTest.java

@@ -0,0 +1,15 @@
+package com.baeldung.datetime;
+import org.junit.Test;
+
+import java.text.ParseException;
+import java.util.Date;
+
+import static org.junit.Assert.assertEquals;
+public class DateUtilsUnitTest {
+
+    @Test
+    public void givenDateAndPattern_thenDateIsCorrectlyReturned() throws ParseException {
+        long milliseconds = new Date(2020 - 1900, 0, 1).getTime();
+        assertEquals(DateUtils.getDate(milliseconds), DateUtils.getDate("2020/01/01", "yyyy/MM/dd"));
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/UseSimpleDateFormatTest.java

@@ -0,0 +1,13 @@
+package com.baeldung.datetime;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class UseSimpleDateFormatTest {
+    private UseSimpleDateFormat useSimpleDateFormat = new UseSimpleDateFormat();
+
+    @Test
+    public void givenValues_whenUsingFactoryOf_thenLocalTime() {
+        Assert.assertEquals("2024-09-04 13:42:22 +0530", useSimpleDateFormat.useFormat());
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/sql/DateUtilsUnitTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.datetime.sql;
+
+import static org.junit.Assert.assertEquals;
+
+import java.text.ParseException;
+import java.time.LocalDate;
+
+import org.junit.Test;
+
+public class DateUtilsUnitTest {
+
+    @Test(expected = IllegalArgumentException.class)
+    public void givenDateAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
+        DateUtils.getDate("2020 01 01");
+    }
+
+    @Test
+    public void givenDateAndPattern_thenDateIsCorrectlyReturned() throws ParseException {
+        assertEquals(DateUtils.getDate("2020-01-01"), DateUtils.getDate("2020/01/01", "yyyy/MM/dd"));
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/sql/TimeUtilsUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.datetime.sql;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.datetime.sql.TimeUtils;
+
+import java.text.ParseException;
+
+public class TimeUtilsUnitTest {
+
+    @Test(expected = IllegalArgumentException.class)
+    public void givenTimeAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
+        TimeUtils.getTime("10 11 12");
+    }
+
+    @Test
+    public void givenTimeAndPattern_thenTimeIsCorrectlyReturned() throws ParseException {
+        assertEquals(TimeUtils.getTime("10:11:12"), TimeUtils.getTime("10 11 12", "hh mm ss"));
+    }
+}

core-java-modules/core-java-8-datetime/src/test/java/com/baeldung/datetime/sql/TimestampUtilsUnitTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.datetime.sql;
+
+import org.junit.Test;
+
+import java.text.ParseException;
+
+import static org.junit.Assert.assertEquals;
+
+public class TimestampUtilsUnitTest {
+
+    @Test(expected = IllegalArgumentException.class)
+    public void givenTimestampAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
+        TimestampUtils.getTimestamp("2020/01/01 10:11-12");
+    }
+
+    @Test
+    public void givenTimestampAndPattern_thenTimestampIsCorrectlyReturned() throws ParseException {
+        assertEquals(TimestampUtils.getTimestamp("2020-01-01 10:11:12"), TimestampUtils.getTimestamp("2020/01/01 10:11-12", "yyyy/MM/dd hh:mm-ss"));
+    }
+}

core-java-modules/pom.xml

@@ -17,6 +17,7 @@
     <modules>
         <module>core-java</module>
         <module>core-java-8</module>
+        <module>core-java-8-datetime</module>
         <module>core-java-9</module>
 <!--        <module>core-java-10</module>-->
         <module>core-java-11</module>