How to manually publish JAR to maven central?

Question

1) Create your Jira account : Signup Sonatype

2) Create a new project ticket (to claim your workspace) : Create new project ticket

3) Generate a PGP Signature

gpg2 --gen-key
....
gpg: key YOUR_KEY_ID marked as ultimately trusted
...

4) Distributing your public key

gpg2 --keyserver hkp://pool.sks-keyservers.net --send-keys YOUR_KEY_ID

Distribute your key to multiple servers to speed up the synchronization process (pgp.mit.edu, keyserver.ubuntu.com…)

5) Update your ~.m2/settings.xml

<settings>
  <servers>
    <server>
      <id>ossrh</id>
      <username>jira_username</username>
      <password>jira_password</password>
    </server>
  </servers>
  <profiles>
    <profile>
      <id>ossrh</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <properties>
        <gpg.executable>gpg2</gpg.executable>
        <gpg.passphrase>your_key_passphrase</gpg.passphrase>
      </properties>
    </profile>
  </profiles>
</settings>

6) Update your project pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>

    <parent>
        <groupId>org.sonatype.oss</groupId>
        <artifactId>oss-parent</artifactId>
        <version>9</version>
    </parent>

    <groupId>xxx.xxx</groupId>
    <artifactId>xxx</artifactId>
    <version>0.1</version>

    <distributionManagement>
        <snapshotRepository>
            <id>ossrh</id>
          <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        </snapshotRepository>
        <repository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
        </repository>
    </distributionManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <version>2.2.1</version>
                <executions>
                    <execution>
                        <id>attach-sources</id>
                        <goals>
                            <goal>jar-no-fork</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <version>2.9.1</version>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-gpg-plugin</artifactId>
                <version>1.5</version>
                <executions>
                    <execution>
                        <id>sign-artifacts</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>sign</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.sonatype.plugins</groupId>
                <artifactId>nexus-staging-maven-plugin</artifactId>
                <version>1.6.7</version>
                <extensions>true</extensions>
                <configuration>
                    <serverId>ossrh</serverId>
                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
                    <autoReleaseAfterClose>true</autoReleaseAfterClose>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

7) Run Maven

Maven will ask you for your passphrase

mvn clean deploy

8) Comment your Jira ticket

This will trigger the synchronization with central for your group id.

I have promoted my first release. Thanks.

Resources :

OSSRH Guide

Deploy with Maven

PGP Signatures

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