<build><plugins><plugin>
				<groupid>org.codehaus.mojo</groupid>
				<artifactid>maven-buildnumber-plugin</artifactid>
				<version>0.9.6</version>
				<executions>
					<execution>
						<phase>validate</phase>
						<goals>
							<goal>create</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
</plugins></build>

<build><plugins><plugin>
				<groupid>org.apache.maven.plugins</groupid>
				<artifactid>maven-war-plugin</artifactid>
				<version>2.0</version>
				<configuration>
					<archive>
						<manifestentries>
							<implementation -Build>${buildNumber}</implementation>
						</manifestentries>
					</archive>
				</configuration>
			</plugin>
</plugins></build>

	private String readBuildNumber(ServletContext servletContext) {
		try {
			URL resource = servletContext.getResource("/META-INF/MANIFEST.MF");
			InputStream manifestStream = resource.openStream();
			Manifest mf = new Manifest(manifestStream);
			Attributes atts = mf.getMainAttributes();
			String value = atts.getValue("Implementation-Build");
			if (value == null) {
				throw new IllegalArgumentException("Implementation-Build attribute is not set in MANIFEST " + resource.toExternalForm());
			}
			manifestStream.close();
			return value;
		} catch (Exception e) {
			throw new IllegalStateException("Failed to read Implementation-Build attribute from MANIFEST.MF");
		}
	}

<build>
		<resources>
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
			</resource>
		</resources>
</build>