当Maven开始构建项目时,它将逐步按照定义的阶段顺序执行目标,并在每个阶段中进行记录。
Maven具有以下三个标准生命周期-
执行的顺序取决于调用目标和构建阶段的顺序。例如,考虑以下命令。 clean 和 package 参数是构建阶段,而 dependency:copy-dependencies 是部署目标。
mvn clean dependency:copy-dependencies package
在这里,首先执行 clean 阶段,然后执行 dependency:copy-dependencies目标,最后执行 package 阶段。
当无涯教程执行 mvn post-clean 命令时,Maven会调用清理生命周期,该阶段包括以下阶段。
Maven的清理目标(clean:clean)绑定到clean生命周期中的 clean 阶段。它的 clean:cleangoal 通过删除构建目录来删除构建的输出。因此,当执行 mvn clean 命令时,Maven会删除构建目录。
在以下示例中将maven-antrun-plugin:run目标附加到预清理,清理和后清理阶段。在C:\MAVEN\project文件夹中创建了pom.xml。
<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.companyname.projectgroup</groupId> <artifactId>project</artifactId> <version>1.0</version> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-antrun-plugin</artifactId> <version>1.1</version> <executions> <execution> <id>id.pre-clean</id> <phase>pre-clean</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>pre-clean phase</echo> </tasks> </configuration> </execution> <execution> <id>id.clean</id> <phase>clean</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>clean phase</echo> </tasks> </configuration> </execution> <execution> <id>id.post-clean</id> <phase>post-clean</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>post-clean phase</echo> </tasks> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>
现在打开命令控制台,转到包含pom.xml的文件夹并执行以下 mvn 命令。
C:\MVN\project>mvn post-clean
Maven将开始处理并显示执行生命周期的所有阶段。
[INFO] Scanning for projects... [INFO] ----------------------------------------------------------------- - [INFO] Building Unnamed - com.companyname.projectgroup:project:jar:1.0 [INFO] task-segment: [post-clean] [INFO] ------------------------------------------------------------------ [INFO] [antrun:run {execution: id.pre-clean}] [INFO] Executing tasks [echo] pre-clean phase [INFO] Executed tasks [INFO] [clean:clean {execution: default-clean}] [INFO] [antrun:run {execution: id.clean}] [INFO] Executing tasks [echo] clean phase [INFO] Executed tasks [INFO] [antrun:run {execution: id.post-clean}] [INFO] Executing tasks [echo] post-clean phase [INFO] Executed tasks [INFO] ------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------ [INFO] Total time: > 1 second [INFO] Finished at: Sat Jul 07 13:38:59 IST 2012 [INFO] Final Memory: 4M/44M [INFO] ------------------------------------------------------------------
您可以尝试调整 mvn clean 命令,该命令将显示 pre-clean 和clean。 后期清理阶段将不会执行任何操作。
这是Maven的主要生命周期,用于构建应用程序。它分为以下21个阶段。
Sr.No. | Lifecycle Phase & Remark |
---|---|
1 | validate 验证项目是否正确以及所有必要的信息是否可用以完成构建过程。 |
2 | initialize 初始化构建状态。 |
3 | generate-sources 生成任何要包含在编译阶段的源代码。 |
4 | process-sources 处理源代码,例如,过滤任何值。 |
5 | generate-resources 生成要包含在包中的资源。 |
6 | process-resources 将资源复制并处理到目标目录中,以准备打包阶段。 |
7 | compile 编译项目的源代码。 |
8 | process-classes 对编译后生成的文件进行后处理,例如对Java类进行字节码增强/优化。 |
9 | generate-test-sources 生成任何要包含在编译阶段的测试源代码。 |
10 | process-test-sources 处理测试源代码,例如,过滤所有值。 链接:https://www.learnfk.comhttps://www.learnfk.com/maven/maven-build-life-cycle.html 来源:LearnFk无涯教程网 |
11 | test-compile 将测试源代码编译到测试目标目录中。 |
12 | process-test-classes 处理从测试代码文件编译生成的文件。 |
13 | test 使用合适的单元测试框架(Junit是其中之一)运行测试。 |
14 | prepare-package 在实际包装之前,请执行准备包装所需的任何操作。 |
15 | package 取得编译后的代码并将其打包为可分发的格式,例如JAR,WAR或EAR文件。 |
16 | pre-integration-test 在执行集成测试之前执行所需的操作。例如,设置所需的环境。 |
17 | integration-test 如有必要,将程序包处理并部署到可以运行集成测试的环境中。 |
18 | post-integration-test 执行集成测试后,执行所需的操作。例如,清理环境。 |
19 | verify 运行任何检查,以验证该软件包有效并符合质量标准。 |
20 | install 将程序包安装到本地存储库中,该存储库可用作本地其他项目中的依赖项。 |
21 | deploy 将最终软件包复制到远程存储库,以便与其他开发人员和项目共享。 |
在以下示例中,无涯教程将把maven-antrun-plugin:run目标附加到Build生命周期的几个阶段。这将能够回显显示生命周期各个阶段的文本消息。
已经更新了C:\MAVEN\project文件夹中的pom.xml。
<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.companyname.projectgroup</groupId> <artifactId>project</artifactId> <version>1.0</version> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-antrun-plugin</artifactId> <version>1.1</version> <executions> <execution> <id>id.validate</id> <phase>validate</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>validate phase</echo> </tasks> </configuration> </execution> <execution> <id>id.compile</id> <phase>compile</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>compile phase</echo> </tasks> </configuration> </execution> <execution> <id>id.test</id> <phase>test</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>test phase</echo> </tasks> </configuration> </execution> <execution> <id>id.package</id> <phase>package</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>package phase</echo> </tasks> </configuration> </execution> <execution> <id>id.deploy</id> <phase>deploy</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>deploy phase</echo> </tasks> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>
现在打开命令控制台,转到包含pom.xml的文件夹,然后执行以下 mvn 命令。
C:\MVN\project>mvn compile
Maven将开始处理并显示构建生命周期的各个阶段,直至编译阶段。
[INFO] Scanning for projects... [INFO] ----------------------------------------------------------------- - [INFO] Building Unnamed - com.companyname.projectgroup:project:jar:1.0 [INFO] task-segment: [compile] [INFO] ----------------------------------------------------------------- - [INFO] [antrun:run {execution: id.validate}] [INFO] Executing tasks [echo] validate phase [INFO] Executed tasks [INFO] [resources:resources {execution: default-resources}] [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory C:\MVN\project\src\main\resources [INFO] [compiler:compile {execution: default-compile}] [INFO] Nothing to compile - all classes are up to date [INFO] [antrun:run {execution: id.compile}] [INFO] Executing tasks [echo] compile phase [INFO] Executed tasks [INFO] ----------------------------------------------------------------- - [INFO] BUILD SUCCESSFUL [INFO] ----------------------------------------------------------------- - [INFO] Total time: 2 seconds [INFO] Finished at: Sat Jul 07 20:18:25 IST 2012 [INFO] Final Memory: 7M/64M [INFO] ----------------------------------------------------------------- -
Maven Site 插件通常用于创建新文档报告,部署网站等。它具有以下阶段-
在以下示例中,无涯教程将 maven-antrun-plugin:run 目标附加到站点生命周期的所有阶段。这将能够回显显示生命周期各个阶段的文本消息。
已经更新了C:\MAVEN\project文件夹中的pom.xml。
<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.companyname.projectgroup</groupId> <artifactId>project</artifactId> <version>1.0</version> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-antrun-plugin</artifactId> <version>1.1</version> <executions> <execution> <id>id.pre-site</id> <phase>pre-site</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>pre-site phase</echo> </tasks> </configuration> </execution> <execution> <id>id.site</id> <phase>site</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>site phase</echo> </tasks> </configuration> </execution> <execution> <id>id.post-site</id> <phase>post-site</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>post-site phase</echo> </tasks> </configuration> </execution> <execution> <id>id.site-deploy</id> <phase>site-deploy</phase> <goals> <goal>run</goal> </goals> <configuration> <tasks> <echo>site-deploy phase</echo> </tasks> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>
现在打开命令控制台,转到包含pom.xml的文件夹,然后执行以下 mvn 命令。
C:\MVN\project>mvn site
Maven将开始处理并显示站点生命周期的各个阶段,直至站点阶段。
[INFO] Scanning for projects... [INFO] ------------------------------------------------------------------ [INFO] Building Unnamed - com.companyname.projectgroup:project:jar:1.0 [INFO] task-segment: [site] [INFO] ------------------------------------------------------------------ [INFO] [antrun:run {execution: id.pre-site}] [INFO] Executing tasks [echo] pre-site phase [INFO] Executed tasks [INFO] [site:site {execution: default-site}] [INFO] Generating "About" report. [INFO] Generating "Issue Tracking" report. [INFO] Generating "Project Team" report. [INFO] Generating "Dependencies" report. [INFO] Generating "Project Plugins" report. [INFO] Generating "Continuous Integration" report. [INFO] Generating "Source Repository" report. [INFO] Generating "Project License" report. [INFO] Generating "Mailing Lists" report. [INFO] Generating "Plugin Management" report. [INFO] Generating "Project Summary" report. [INFO] [antrun:run {execution: id.site}] [INFO] Executing tasks [echo] site phase [INFO] Executed tasks [INFO] ------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------ [INFO] Total time: 3 seconds [INFO] Finished at: Sat Jul 07 15:25:10 IST 2012 [INFO] Final Memory: 24M/149M [INFO] ------------------------------------------------------------------
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