From 3c8a85f2b1ad217bf8f7ce7ce01b37799219ec1a Mon Sep 17 00:00:00 2001
From: Gustavo Martin Morcuende <gu.martinm@gmail.com>
Date: Wed, 20 May 2015 02:03:06 +0200
Subject: [PATCH] Date parsing using Java 8

---
 .../de/example/date/parsing/DateFormatUtils.java   | 38 ++++++++++++++++++++++
 .../de/example/date/parsing/DateHourFormatter.java | 24 ++++++++++++++
 .../de/example/date/parsing/MainDateFormat.java    | 37 +++++++++++++++++++++
 3 files changed, 99 insertions(+)
 create mode 100644 Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateFormatUtils.java
 create mode 100644 Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateHourFormatter.java
 create mode 100644 Allgemeines/DateParsingJava8/src/de/example/date/parsing/MainDateFormat.java

diff --git a/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateFormatUtils.java b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateFormatUtils.java
new file mode 100644
index 0000000..334a216
--- /dev/null
+++ b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateFormatUtils.java
@@ -0,0 +1,38 @@
+package de.example.date.parsing;
+
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.Date;
+
+
+public class DateFormatUtils {
+
+	public static String format(Date date, String format) {
+		final ZoneId timeZone = ZoneId.of("America/Los_Angeles");
+		
+		return DateFormatUtils.format(date, format, timeZone);
+	}
+
+	public static String format(Date date, String format, ZoneId timeZone) {
+		final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
+		final Instant instantDate = Instant.ofEpochMilli(date.getTime());
+		final LocalDateTime localDateTime = LocalDateTime.ofInstant(instantDate, timeZone);
+		
+		return localDateTime.format(formatter);
+	}
+
+	public static Date parse(String text, String format) {
+		final ZoneId timeZone = ZoneId.of("America/Los_Angeles");
+		
+		return DateFormatUtils.parse(text, format, timeZone);
+	}
+
+	public static Date parse(String text, String format, ZoneId timeZone) {
+		final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
+		final LocalDateTime dateTimeJava8 = LocalDateTime.parse(text, formatter);
+		
+		return Date.from(dateTimeJava8.atZone(timeZone).toInstant());
+	}
+}
diff --git a/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateHourFormatter.java b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateHourFormatter.java
new file mode 100644
index 0000000..6dfb391
--- /dev/null
+++ b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/DateHourFormatter.java
@@ -0,0 +1,24 @@
+package de.example.date.parsing;
+
+import java.util.Date;
+
+
+public class DateHourFormatter {
+
+	public static final String DATE_FORMAT = "dd/MM/yyyy HH:mm";
+
+	private DateHourFormatter() {
+	}
+
+	public static String formatToDateTime(Date date) {
+		if (date == null) {
+			return "";
+		}
+		return DateFormatUtils.format(date, DATE_FORMAT);
+	}
+
+	public static Date parseToDate(String text) {
+		return DateFormatUtils.parse(text, DATE_FORMAT);
+	}
+
+}
diff --git a/Allgemeines/DateParsingJava8/src/de/example/date/parsing/MainDateFormat.java b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/MainDateFormat.java
new file mode 100644
index 0000000..6abb385
--- /dev/null
+++ b/Allgemeines/DateParsingJava8/src/de/example/date/parsing/MainDateFormat.java
@@ -0,0 +1,37 @@
+package de.example.date.parsing;
+
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.Date;
+
+
+public class MainDateFormat {
+
+	public static void main(String[] args) {
+		
+		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm");
+		ZoneId timeZone = ZoneId.of("America/Los_Angeles");
+		
+		// Just date without minutes and seconds.
+		LocalDate dateJava8 = LocalDate.parse("12/05/2014 18:40", formatter);
+		Date date = Date.from(dateJava8.atStartOfDay().atZone(timeZone).toInstant());
+		
+		// Date with minutes and seconds.
+		LocalDateTime dateTimeJava8  = LocalDateTime.parse("12/05/2014 18:40", formatter);
+		Date dateTime = Date.from(dateTimeJava8.atZone(timeZone).toInstant());
+		
+		Date now = new Date();
+		Instant instant = Instant.ofEpochMilli(now.getTime());
+		LocalDateTime currentLocalDateTime = LocalDateTime.ofInstant(instant, timeZone);
+		String currentTime = currentLocalDateTime.format(formatter);
+
+		String dateHourCurrentTimeFormatter = DateHourFormatter.formatToDateTime(now);
+		
+		
+		Date dateCurrentTimeFormatter = DateHourFormatter.parseToDate("12/05/2014 18:40");
+	}
+
+}
-- 
2.1.4