[笔记]maven

概览

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settings.xml介绍

• 存在以下几个主要的元素

localReposotory：本地仓库路径
pluginGroups：简化插件下载的时候的plugin’ gorup信息
servers+distributionManagement配合使用：
       servers：远程仓库(distributionManagementB标签下)授权信息
       distributionManagement：标识mvn deploy需要发布的远程仓库
mirrors：镜像仓库，mirrorOf定义了会拦截哪些repository配置
proxies：代理信息
profiles：配置清单
       profile/activation：激活的配置
       profile/repositories：远程仓库配置
       profile/properties：参数配置

• 需要注意的点：

  • mirrors是会拦截发向profiles/profile/repositories中的仓库的请求：当请求需要从profiles/profile/repositories中的某个仓库下载时，发现mirrors中有该仓库对应的镜像配置，则从镜像中进行下载

  • settings和pom中的profile优先级：
    repository（setting.xml） < repository（pom.xml） < mirror（setting.xml）

  • 如果setting和pom中都定义了profile：

    • 相同id下：如果settings中激活了，则settings会覆盖pom中profile
    • 不同id下：profile(pom) > profile(settings)

  • 常见的snapshot、release处理策略
    snapshot可以覆盖发布，release不可以，会存在安全性、可溯源性风险

• 其它settings的配置详细介绍：https://www.cnblogs.com/iceJava/p/10356309.html

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pom.xml详细

• 参见：https://blog.youkuaiyun.com/qq_33363618/article/details/79438044

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package示例

• 构建时，每次个阶段都依赖独立的plugin
• 构建的具体信息，参见pom.xml配置

# package过程，可以看到，会使用不同的插件进行构建
# 如果需要有特殊插件定制的时候，可在pom.xml的build中定义
mavenLearn % mvn package
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] 
[INFO] mavenLearn                                                         [pom]
[INFO] child                                                              [jar]
[INFO] 
[INFO] -----------------------< org.example:mavenLearn >-----------------------
[INFO] Building mavenLearn 1.0-SNAPSHOT                                   [1/2]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] -------------------------< org.example:child >--------------------------
[INFO] Building child 1.0-SNAPSHOT                                        [2/2]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ child ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ child ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ child ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/zhaoyue/codes/mavenLearn/child/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ child ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ child ---
[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ child ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for mavenLearn 1.0-SNAPSHOT:
[INFO] 
[INFO] mavenLearn ......................................... SUCCESS [  0.003 s]
[INFO] child .............................................. SUCCESS [  0.885 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.988 s
[INFO] Finished at: 2020-05-05T23:02:31+08:00
[INFO] ------------------------------------------------------------------------