Maven笔记8-Maven中使用Nexus创建私服
??? 搭建私服的优点：
??? (1) 降低中央仓库负荷
??? (2) 节省外网带宽
??? (3) 加速Maven构建
??? (4) 自己部署构件
1. Nexus安装
??? (1) 下载：http://www.sonatype.org/nexus/，下载包：nexus-2.0.2.war
??? (2) 安装
???????? A. WAR方式安装Nexus
???????? 将nexus-2.0.2.war拷贝至Tomcat的部署目录：C:\Apache-tomcat-7.0.26\webapps下，
???????? 启动Tomcat, 进入Tomcat管理首页即可；
???????? 浏览器访问地址：http://localhost:8080/nexus
???????? B. Bundle方式安装Nexus
???????? 因为Bundle方式的Nexus默认集成了Jetty容器，因此不需要其他第三方Web容器，解压下载的Bundle
???????? 方式的Nexus文件，有下面的两个目录：
???????? nexus-webapp-2.0.2:包含Nexus所需要的文件，如启动脚本，依赖JAR等。
???????? sonatype-work:包含Nexus生成的配置文件、日志文件、仓库文件。
???????? WinOS下，进入nexus-webapp-2.0.2/bin/jsw/windows-x86-32运行nexus.bat脚本启动服务。
???????? 浏览器访问地址：http://localhost:8081/nexus
???????? 备注：
???????? 更改访问端口：修改nexus-webapp-2.0.2/conf/plexus.properties
??? (3) 登录
???????? Nexus默认的管理员及密码：admin/admin123
2. Nexus的仓库与仓库组
??? Nexus有四种仓库类型：group,hosted,proxy,virtual,仓库格式为：maven2或maven1,仓库属性Policy
??? 为：Release或Snapshot.
3. 配置Maven从Nexus下载构件
??? (1) 在POM中配置Nexus仓库
??? <project>
???????? ...
???????? <repositories>
??????????? <repository>
???????????????? <id>nexus</id>
???????????????? <name>Nexus</name>
???????????????? <url>http://localhost:8081/nexus/content/groups/public/<url>
???????????????? <release><enabled>true</enabled></release>
???????????????? <snapshots><enabled>true></enabled></snapshots>
???????????? </repository>
??????? </repositories>
??????? <pluginRepositories>
???????????? <pluginRepository>
???????????????? <id>nexus</id>
???????????????? <name>Nexus</name>
???????????????? <url>http://localhost:8081/nexus/content/groups/public/<url>
???????????????? <release><enabled>true</enabled></release>
???????????????? <snapshots><enabled>true></enabled></snapshots>
????????????? </pluginRepository>
???????? </pluginRepositories>
???????? ...
??? </project>
??? 上述配置只对当前项目有效，若需让本机所有Maven项目均使用Mavne私服，应该在setting.xml中进行配置。
??? (2) 在setting.xml中配置Nexus仓库
??? <settings>
????????? ...
????????? <profiles>
??????????????? <profile>
??????????????????? <id>nexus</id>
??????????????????? <repositories>
??????????????????????? <repository>
????????????????????????? <id>nexus</id>
????????????????????????? <name>Nexus</name>
????????????????????????? <url>http://localhost:8081/nexus/content/groups/public/<url>
????????????????????????? <release><enabled>true</enabled></release>
????????????????????????? <snapshots><enabled>true></enabled></snapshots>
??????????????????????? </repository>
???????????????????? </repositories>
???????????????????? <pluginRepositories>
??????????????????????? <pluginRepository>
??????????????????????????? <id>nexus</id>
??????????????????????????? <name>Nexus</name>
??????????????????????????? <url>http://localhost:8081/nexus/content/groups/public/<url>
??????????????????????????? <release><enabled>true</enabled></release>
??????????????????????????? <snapshots><enabled>true></enabled></snapshots>
?????????????????????? </pluginRepository>
???????????????????? </pluginRepositories>
??????????????? </profile>
?????????? </profiles>
?????????? <activeProfiles>
?????????????? <activeProfile>nexus</activeProfiles>
?????????? </activaProfiles>
??????????? ...
??? </settings>
??? (3) 配置镜像让Maven只使用私服
??? <settings>
????????? ...
????????? <mirrors>
????????????? <mirror>
????????????????? <id>nexus</id>
????????????????? <mirrorOf>*<?mirrorOf>
????????????????? <url>http://localhost:8081/nexus/content/groups/public/</url>
????????????? </mirror>
????????? </mirrors>
????????? <profiles>
??????????????? <profile>
??????????????????? <id>nexus</id>
??????????????????? <repositories>
??????????????????????? <repository>
????????????????????????? <id>central</id>
????????????????????????? <name>http://central</name>????????????????????????
????????????????????????? <release><enabled>true</enabled></release>
????????????????????????? <snapshots><enabled>true></enabled></snapshots>
??????????????????????? </repository>
???????????????????? </repositories>
???????????????????? <pluginRepositories>
??????????????????????? <pluginRepository>
??????????????????????????? <id>central</id>
??????????????????????????? <name>http://central</name>???????????????????????????
??????????????????????????? <release><enabled>true</enabled></release>
??????????????????????????? <snapshots><enabled>true></enabled></snapshots>
?????????????????????? </pluginRepository>
???????????????????? </pluginRepositories>
??????????????? </profile>
?????????? </profiles>
?????????? <activeProfiles>
?????????????? <activeProfile>nexus</activeProfiles>
?????????? </activaProfiles>
??????????? ...
??? </settings>
??? 说明：该配置中仓库及插件仓库的id均为central，即覆盖了超级POM中央仓库的配置，他们的ULR可以不做
??? 配置，因为所有请求都会通过镜像访问私服地址。
4. 部署构件至Nexus
??? (1) 使用Maven部署构件至Nexus
??? <project>
??????? ...
??????? <distributionManagement>
??????????? <repository>
????????????????? <id>nexus-releases</id>
????????????????? <name>Nexus Releasse Repository</name>
????????????????? <url>http://localhost:8081/nexus/content/repositories/release</url>
??????????? </repository>
??????????? <snapshotRepository>
????????????????? <id>nexus-snapshots</id>
????????????????? <name>Nexus Snapshots Repository</name>
????????????????? <url>http://localhost:8081/nexus/content/repositories/snapshots</url>
??????????? </snapshotRepository>
???????? </distributionManagement>
???????? ...
??? </project>
??? Nexus的仓库对于匿名用户时只读的，为了方便部署，需要在setting.xml配置认证信息：
? ? <settings>
???????? ...
???????? <servers>
???????????? <server>
???????????????? <id>nexus-releases></id>
???????????????? <username>admin</username>
???????????????? <password>*****</password>
???????????? </server>
???????????? <server>
???????????????? <id>nexus-snapshots></id>
???????????????? <username>admin</username>
???????????????? <password>*****</password>
???????????? </server>
????????? </servers>
????????? ...
? ? </settings>
??? (2) 手动部署第三方构件至Nexus
??? 选择宿主仓库如：3rd Party，在Artifact Upload中上传。
5. 其他私服软件
??? Apache的Archive和JForg的Artifactory.
