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一、注意

运行 Maven 构建命令时，必须进入到含有 pom.xml文件的目录中。如果没有在 pom.xml 所在的目录运行 Maven 的构建命令，就会发生错误：The goal you specified requires a project to execute but there is no POM in this directory

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二、🚀清理操作的命令

命令：

mvn clean

效果：

删除 target 目录
（代码为成功效果演示，可忽略…）

D:\maven-workspace\spaceVedio\pro03-maven-parent>mvn clean
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] pro03-maven-parent                                                 [pom]
[INFO] pro06-maven-module                                                 [jar]
[INFO] pro05-maven-module                                                 [jar]
[INFO] pro04-maven-module                                                 [jar]
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro03-maven-parent >-----------------
[INFO] Building pro03-maven-parent 1.0-SNAPSHOT                           [1/4]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ pro03-maven-parent ---
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro06-maven-module >-----------------
[INFO] Building pro06-maven-module 1.0-SNAPSHOT                           [2/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ pro06-maven-module ---
[INFO] Deleting D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro05-maven-module >-----------------
[INFO] Building pro05-maven-module 1.0-SNAPSHOT                           [3/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ pro05-maven-module ---
[INFO] Deleting D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target
[INFO]
[INFO] ----------------< com.haojin.maven:pro04-maven-module >-----------------
[INFO] Building pro04-maven-module 1.0-SNAPSHOT                           [4/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ pro04-maven-module ---
[INFO] Deleting D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for pro03-maven-parent 1.0-SNAPSHOT:
[INFO]
[INFO] pro03-maven-parent ................................. SUCCESS [  0.104 s]
[INFO] pro06-maven-module ................................. SUCCESS [  0.024 s]
[INFO] pro05-maven-module ................................. SUCCESS [  0.030 s]
[INFO] pro04-maven-module ................................. SUCCESS [  0.030 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.289 s
[INFO] Finished at: 2022-11-27T12:55:29+08:00
[INFO] ------------------------------------------------------------------------

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三、🚀编译操作的命令

命令 - 效果：

编译主程序的命令：mvn compile

编译测试程序的命令：mvn test-compile

• 主体程序编译后的结果存放在target/classes目录下
• 测试程序编译后的结果存放在target/test-classes目录下

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四、🚀测试操作的命令

命令：

mvn test

效果：
对工程中 test目录 下的程序进行测试，测试的报告放在target/surefire-reports目录

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五、🚀打包操作的命令

命令：

mvn package

效果：

执行命令的工程会被打包成 —— jar包，得到的jar包被存放在target目录中

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六、🚀安装操作的命令

命令：

mvn intall

效果：

将本地构建过程中生成的 jar 包存入 Maven 本地仓库。
（代码为成功效果演示，可忽略… 示例的pro03-maven-parent工程是打包方式为pom的管理子工程的工程，其与其子工程生成的jar包就会被存放到本地仓库的指定路径中去）

D:\maven-workspace\spaceVedio\pro03-maven-parent>mvn install
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] pro03-maven-parent                                                 [pom]
[INFO] pro06-maven-module                                                 [jar]
[INFO] pro05-maven-module                                                 [jar]
[INFO] pro04-maven-module                                                 [jar]
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro03-maven-parent >-----------------
[INFO] Building pro03-maven-parent 1.0-SNAPSHOT                           [1/4]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ pro03-maven-parent ---
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pom.xml to d:\maven-repository\cpm\haojin\maven\pro03-maven-parent\1.0-SNAPSHOT\pro03-maven-parent-1.0-SNAPSHOT.pom
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro06-maven-module >-----------------
[INFO] Building pro06-maven-module 1.0-SNAPSHOT                           [2/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ pro06-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ pro06-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ pro06-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ pro06-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target\test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ pro06-maven-module ---
[INFO] Surefire report directory: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running cpm.haojin.maven.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.007 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ pro06-maven-module ---
[INFO] Building jar: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target\pro06-maven-module-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ pro06-maven-module ---
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\target\pro06-maven-module-1.0-SNAPSHOT.jar to d:\maven-repository\cpm\haojin\maven\pro06-maven-module\1.0-SNAPSHOT\pro06-maven-module-1.0-SNAPSHOT.jar
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro06-maven-module\pom.xml to d:\maven-repository\cpm\haojin\maven\pro06-maven-module\1.0-SNAPSHOT\pro06-maven-module-1.0-SNAPSHOT.pom
[INFO]
[INFO] ----------------< cpm.haojin.maven:pro05-maven-module >-----------------
[INFO] Building pro05-maven-module 1.0-SNAPSHOT                           [3/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ pro05-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ pro05-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ pro05-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ pro05-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target\test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ pro05-maven-module ---
[INFO] Surefire report directory: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running cpm.haojin.maven.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ pro05-maven-module ---
[INFO] Building jar: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target\pro05-maven-module-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ pro05-maven-module ---
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\target\pro05-maven-module-1.0-SNAPSHOT.jar to d:\maven-repository\cpm\haojin\maven\pro05-maven-module\1.0-SNAPSHOT\pro05-maven-module-1.0-SNAPSHOT.jar
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro05-maven-module\pom.xml to d:\maven-repository\cpm\haojin\maven\pro05-maven-module\1.0-SNAPSHOT\pro05-maven-module-1.0-SNAPSHOT.pom
[INFO]
[INFO] ----------------< com.haojin.maven:pro04-maven-module >-----------------
[INFO] Building pro04-maven-module 1.0-SNAPSHOT                           [4/4]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ pro04-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ pro04-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ pro04-maven-module ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ pro04-maven-module ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target\test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ pro04-maven-module ---
[INFO] Surefire report directory: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.haojin.maven.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.008 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ pro04-maven-module ---
[INFO] Building jar: D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target\pro04-maven-module-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ pro04-maven-module ---
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\target\pro04-maven-module-1.0-SNAPSHOT.jar to d:\maven-repository\com\haojin\maven\pro04-maven-module\1.0-SNAPSHOT\pro04-maven-module-1.0-SNAPSHOT.jar
[INFO] Installing D:\maven-workspace\spaceVedio\pro03-maven-parent\pro04-maven-module\pom.xml to d:\maven-repository\com\haojin\maven\pro04-maven-module\1.0-SNAPSHOT\pro04-maven-module-1.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for pro03-maven-parent 1.0-SNAPSHOT:
[INFO]
[INFO] pro03-maven-parent ................................. SUCCESS [  0.171 s]
[INFO] pro06-maven-module ................................. SUCCESS [  1.400 s]
[INFO] pro05-maven-module ................................. SUCCESS [  0.370 s]
[INFO] pro04-maven-module ................................. SUCCESS [  0.410 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.452 s
[INFO] Finished at: 2022-11-27T13:18:56+08:00
[INFO] ------------------------------------------------------------------------

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被存放的 jar 包在 Maven 仓库中的路径是根据它的坐标生成的：

• 某个工程坐标：

  <groupId>cpm.haojin.maven</groupId>
  <artifactId>pro04-maven-module</artifactId>
  <version>1.0-SNAPSHOT</version>

• 生成的路径：

D:\maven-repository\com\haojin\maven\pro04-maven-module\1.0-SNAPSHOT\pro04-maven-module-1.0-SNAPSHOT.jar

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