[JAVA] Output system time to MANIFEST.MF with Maven

Java web project deployed with Maven in MANIFEST.MF file "When did you compile?" I was asked to output, so I checked it, so make a note.

environment

• Maven3.5.3
• Java 1.8,0_181 --I was compiling with Jenkins, but it probably doesn't really matter.

Requirements

--Output the system time when Maven is executed to MANIFEST.MF in the jar file.

Somehow sticking to it.

--Do not use AntRun Plugin. I don't want to build build.xml. --I don't want to write code.

manner

use maven.build.timestamp

First, how to use the property maven.build.timestamp prepared by Maven. See below. http://vbnmkyoto.blogspot.com/

pom.xml(Excerpt)

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-jar-plugin</artifactId>
	<version>3.1.0</version>
	<configuration>
		<archive>
			<manifestEntries>
				<Build-Timestamp>${maven.build.timestamp}</Build-Timestamp>
			</manifestEntries>
		</archive>
	</configuration>
</plugin>

To change the format, specify the format with the maven.build.timestamp.format property.

pom.xml(Excerpt)

<properties>
	<maven.build.timestamp.format>yyyyMMhhmmss</maven.build.timestamp.format>
</properties>

If you do this, MANIFEST.MF will appear like this.

MANIFEST.MF

Build-Timestamp：20181129115959

Rakuchin ... But in Maven 3.2.2 or later, the output time is UTC. https://issues.apache.org/jira/browse/MNG-5452 It is inconvenient to work normally in Japan. I wish I could set the time zone, but I couldn't find anything like that.

Use Build Helper Maven Plugin

I searched for something else like that and tried using the Build Helper Maven Plugin. See below. https://stackoverflow.com/questions/28281988/how-to-have-maven-show-local-timezone-in-maven-build-timestamp

pom.xml(Excerpt)

<plugin>
	<groupId>org.codehaus.mojo</groupId>
	<artifactId>build-helper-maven-plugin</artifactId>
	<version>3.0.0</version>
	<executions>
		<execution>
			<id>timestamp-property</id>
			<goals>
				<goal>timestamp-property</goal>
			</goals>
			<configuration>
				<name>build.time</name>
				<pattern>yyyyMMddHHmmss</pattern>
				<locale>ja_JP</locale>
				<timeZone>Asia/Tokyo</timeZone>
			</configuration>
		</execution>
	</executions>
</plugin>

Set the setting value of name in the description of the output part.

pom.xml(Excerpt)

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-jar-plugin</artifactId>
	<version>3.1.0</version>
	<configuration>
		<archive>
			<manifestEntries>
				<Build-Timestamp>${build.time}</Build-Timestamp>
			</manifestEntries>
		</archive>
	</configuration>
</plugin>

Now, the build execution time according to Japan time is output to MANIFEST.MF.

reference

https://www.mojohaus.org/build-helper-maven-plugin/usage.html It seems to be convenient, so you may want to check it out a little more.