Maven發(fā)布公共jar包到私服倉庫

一個簡單的springboot微服務項目，所有子模塊依賴api-root這個POM


模塊說明
項目結構

公共的jar中因為沒有main方法，當我們install整個項目的時候，會拋異常：

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.2.RELEASE:repackage (default) on project commons: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.0.2.RELEASE:repackage failed: Unable to find main class -> [Help 1]

解決辦法：在公共jar包的POM中加入

   <build>
      <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>

而服務jar我們通常不需要deploy到私服倉庫中去，只需要在服務模塊的POM中加入

   <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>

deploy我們需要告訴它發(fā)布到哪去，只需要在父POM中加入下面的代碼：

    <distributionManagement>
        <!-- 兩個ID必須與 setting.xml中的<server><id>nexus-releases</id></server>保持一致-->
        <repository>
            <id>nexus-releases</id>
            <name>Nexus Release Repository</name>
            <url>http://192.168.1.2:8081/repository/maven-releases/</url>
        </repository>
        <snapshotRepository>
            <id>nexus-snapshots</id>
            <name>Nexus Snapshot Repository</name>
            <url>http://192.168.1.2:8081/repository/maven-snapshots/</url>
        </snapshotRepository>
    </distributionManagement>

上面的<id>和maven的settings.xml中配置的id要對應

  <servers>
    <server>
        <id>nexus-releases</id>
        <username>admin</username>
        <password>admin123</password>
    </server>
    <server>
        <id>nexus-snapshots</id>
        <username>admin</username>
        <password>admin123</password>
    </server>
  </servers>

這樣當我們運行mvn deploy -Dmanve.test.skip=true的時候，就可以將api-root.pom，commons.jar，api-feign.jar發(fā)布到私服倉庫中供別人使用了。

有時候我們自己的公共的snapshots包deploy到私服后，maven并沒有去拉取最新的jar包，這是因為maven默認配置每天只拉取一次。

方案一：

可以在setting.xml文件中修改默認行為：

<updatePolicy>always</updatePolicy>

updatePolicy可用的值包括：

  • daily 每天檢查一次(默認)
  • never 從不檢查更新；
  • always 每次構建都檢查更新；
  • interval：X 每隔X分鐘檢查一次更新（X為任意整數(shù)）

方案二：

或者打包的時候添加-U參數(shù)來強制更新。

mvn clean package -U

方案三：

idea中還可以勾選Always update snapshots

image.png

附：

  • maven的setting.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">
  <pluginGroups>
  </pluginGroups>
  <proxies>
  </proxies>
  <servers>
    <server>
        <id>nexus-releases</id>
        <username>admin</username>
        <password>admin123</password>
    </server>
    <server>
        <id>nexus-snapshots</id>
        <username>admin</username>
        <password>admin123</password>
    </server>
  </servers>
<mirrors>
  <mirror>
    <id>maven-public</id>
    <name>maven-public</name>
    <url>http://192.168.1.2:8081/repository/maven-public/</url>
    <mirrorOf>central</mirrorOf>
  </mirror>
  </mirrors>
  <profiles>
    <profile> 
      <id>maven-public</id> 
      <repositories> 
          <repository> 
              <id>nexus-releases</id> <!--正式倉庫id-->
              <!--name隨便-->
              <name>Nexus Release Snapshot Repository</name> 
              <!--地址是nexus中repository（Releases/Snapshots）中對應的地址-->
              <url>http://192.168.1.2:8081/repository/maven-releases/</url>
              <releases>
                  <enabled>true</enabled>
              </releases> 
              <snapshots>
                  <enabled>false</enabled>
              </snapshots> 
          </repository>
          <repository>
              <id>nexus-snapshots</id>
              <url>http://192.168.1.2:8081/repository/maven-snapshots/</url>
              <releases>
                <enabled>false</enabled>
              </releases>
              <snapshots>
                <enabled>true</enabled>
              </snapshots>
              <updatePolicy>always</updatePolicy>
          </repository>
      </repositories>
      <pluginRepositories> <!--插件倉庫地址，各節(jié)點的含義和上面是一樣的-->
        <pluginRepository> 
          <id>nexus-releases</id> 
          <name>Nexus Release Snapshot Repository</name> 
          <url>http://192.168.1.2:8081/repository/maven-releases/</url>
          <releases>
              <enabled>true</enabled>
          </releases> 
          <snapshots>
              <enabled>true</enabled>
          </snapshots>
        </pluginRepository> 
        <pluginRepository> 
          <id>nexus-snapshots</id>
          <url>http://192.168.1.2:8081/repository/maven-snapshots/</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
          <updatePolicy>always</updatePolicy>
        </pluginRepository> 
      </pluginRepositories>  
    </profile> 
  </profiles>
  <!--激活配置-->
  <activeProfiles>
      <activeProfile>maven-public</activeProfile> <!--profile下的id-->
  </activeProfiles>
</settings>
  • 完整的api-root的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.wd.cloud</groupId>
    <artifactId>api-root</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <name>api-root</name>
    <description>微服務根POM</description>

    <modules>
        <module>api-feign</module><!--內(nèi)部互調(diào)接口定義-->
        <module>api-gateway</module><!--api網(wǎng)關-->
        <module>config-server</module><!--配置中心-->
        <module>discovery</module><!--服務注冊中心-->
        <module>auth-server</module><!--鑒權服務-->
        <module>doc-delivery</module><!--文獻傳遞服務-->
        <module>commons</module><!--提取的公共方法和類-->
    </modules>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.M9</spring-cloud.version>
        <openfeign.version>1.4.4.RELEASE</openfeign.version>
        <com.alibaba.druid.version>1.1.9</com.alibaba.druid.version>
        <javax.mail.version>1.4.7</javax.mail.version>
        <swagger.version>1.7.0.RELEASE</swagger.version>
        <cn.hutool.all.version>[4.0.12,)</cn.hutool.all.version>
        <jackson.databind.version>2.9.5</jackson.databind.version>
        <jackson.core.version>2.9.5</jackson.core.version>
        <jackson.asl.version>1.9.12</jackson.asl.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${com.alibaba.druid.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-feign</artifactId>
                <version>${openfeign.version}</version>
            </dependency>
            <dependency>
                <groupId>com.spring4all</groupId>
                <artifactId>swagger-spring-boot-starter</artifactId>
                <version>${swagger.version}</version>
            </dependency>
            <dependency>
                <groupId>javax.mail</groupId>
                <artifactId>mail</artifactId>
                <version>${javax.mail.version}</version>
            </dependency>

            <dependency>
                <groupId>com.wd.cloud</groupId>
                <artifactId>commons</artifactId>
                <version>${version}</version>
            </dependency>
            <dependency>
                <groupId>com.wd.cloud</groupId>
                <artifactId>api-feign</artifactId>
                <version>${version}</version>
            </dependency>
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>${cn.hutool.all.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.databind.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>${jackson.core.version}</version>
            </dependency>
            <dependency>
                <groupId>org.codehaus.jackson</groupId>
                <artifactId>jackson-mapper-asl</artifactId>
                <version>${jackson.asl.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <distributionManagement>
        <!-- 兩個ID必須與 setting.xml中的<server><id>nexus-releases</id></server>保持一致-->
        <repository>
            <id>nexus-releases</id>
            <name>Nexus Release Repository</name>
            <url>http://192.168.1.2:8081/repository/maven-releases/</url>
        </repository>
        <snapshotRepository>
            <id>nexus-snapshots</id>
            <name>Nexus Snapshot Repository</name>
            <url>http://192.168.1.2:8081/repository/maven-snapshots/</url>
        </snapshotRepository>
    </distributionManagement>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>
  • 公共模塊commons的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>
    <version>${parent.version}</version>
    <artifactId>commons</artifactId>
    <packaging>jar</packaging>

    <name>commons</name>
    <description>公共包</description>

    <parent>
        <groupId>com.wd.cloud</groupId>
        <artifactId>api-root</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>
  • 服務模塊config-server的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>

    <artifactId>config-server</artifactId>
    <version>${parent.version}</version>
    <packaging>jar</packaging>

    <name>config-server</name>
    <description>配置服務中心</description>

    <parent>
        <groupId>com.wd.cloud</groupId>
        <artifactId>api-root</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.wd.cloud</groupId>
            <artifactId>commons</artifactId>
        </dependency>
        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>swagger-spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>
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