Maven项目上传公共仓库是我见过最麻烦的（相比npm和pypi）

文档：https://central.sonatype.org/pages/apache-maven.html

准备好maven项目 + Hello类

package com.mouday;

public class Hello {
    public void sayHello(){
        System.out.println("Hello");
    }
}

1. github上传代码

https://github.com/
eg: https://github.com/mouday/hello-package

2. sonatype新建账号

https://issues.sonatype.org/secure/Signup!default.jspa

3. sonatype提交发布申请

等待审核，状态变为RESOLVED已处理
eg: https://issues.sonatype.org/browse/OSSRH-59604

如果是自己的域名，需要认证

设置txt记录后可以进行检查

$ nslookup -q=txt ossrh-59604.mouday.com
ossrh-59604.mouday.com	text = "https://issues.sonatype.org/browse/OSSRH-59604"

4. 生成pgp公钥

# 查看gpg是否安装
gpg --version

# 生成key
gpg --gen-key

# 查询key
gpg --list-keys

# 公钥id发布到GPG服务器
gpg --keyserver hkp://pool.sks-keyservers.net --send-keys <公钥key>

# 查询，可能需要等待一会
gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys <公钥key>

5. 配置settings.xml

~/.m2/settings.xml

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

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 
          http://maven.apache.org/xsd/settings-1.0.0.xsd">
    
     <servers>
        <server>
            <id>ossrh</id>
            <username>OSSRH-USERNAME</username>
            <password>OSSRH-PASSWORD</password>
        </server>
    </servers>

    <profiles>
        <profile>
            <id>jdk-1.8</id>
            <activation>
                <activeByDefault>true</activeByDefault>
                <jdk>1.8</jdk>
            </activation>

            <properties>
                <maven.compiler.source>1.8</maven.compiler.source>
                <maven.compiler.target>1.8</maven.compiler.target>
                <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
                <gpg.executable>gpg</gpg.executable>
                <gpg.passphrase>GPG-PASSWORD</gpg.passphrase>
            </properties>
        </profile>
    </profiles>
</settings>

6. 配置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>

    <groupId>com.mouday</groupId>
    <artifactId>hello-package</artifactId>
    <version>1.0</version>

    <name>hello-package</name>
    <url>https://github.com/mouday/hello-package</url>
    <description>a maven package demo for my first java</description>

    <licenses>
        <license>
            <name>The Apache Software License, Version 2.0</name>
            <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
            <distribution>repo</distribution>
        </license>
    </licenses>

    <scm>
        <connection>scm:https://github.com/mouday/hello-package.git</connection>
        <developerConnection>scm:https://github.com/mouday/hello-package.git</developerConnection>
        <url>https://github.com/mouday/hello-package</url>
    </scm>

    <developers>
        <developer>
            <name>mouday</name>
            <email>pengshiyuyx@gmail.com</email>
            <organization>mouday.com</organization>
            <timezone>+8</timezone>
        </developer>
    </developers>

    <distributionManagement>
        <snapshotRepository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        </snapshotRepository>

        <repository>
            <id>ossrh</id>
            <name>Nexus Release Repository</name>
            <url>http://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
        </repository>

    </distributionManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>jar</goal>
                            <goal>test-jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <!-- Source -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <executions>
                    <execution>
                        <id>attach-sources</id>
                        <goals>
                            <goal>jar-no-fork</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <!-- Javadoc -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <configuration>
                    <additionalJOptions>
                        <additionalJOption>-Xdoclint:none</additionalJOption>
                    </additionalJOptions>
                </configuration>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <!-- GPG -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-gpg-plugin</artifactId>
                <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>1.6.3</version>
                <extensions>true</extensions>
                <configuration>
                    <serverId>ossrh</serverId>
                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
                    <autoReleaseAfterClose>true</autoReleaseAfterClose>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

7. 发布

mvn clean deploy

如果报错可查看解决方式：

signing failed: Inappropriate ioctl for device

过大概2个小时就能在仓库中搜索到自己发布的项目了

https://search.maven.org/

第二天上午，我能在 https://mvnrepository.com/ 搜索到自己的项目了

等待很久之后，就可以在maven项目中使用了

 <dependency>
     <groupId>com.mouday</groupId>
     <artifactId>hello-package</artifactId>
     <version>1.0</version>
 </dependency>

好难…

参考

1. 如何将自己的代码发布到Maven中央仓库？
2. 记一次非Maven项目发布到中央仓库爬过的坑！
3. 发布构件到 Maven 中央仓库遇到的坑