之前几个章节学习了maven的概念，及maven插件安装后如何创建工程，那么maven工程中是如何使用maven命令呢？本章节将会学习这个话题。
在pom.xml中配置maven命令插件
如果向在maven工程中使用maven命令，就必须在pom.xml文件中配置maven命令插件。接下来基于上一章文章（《Java-Maven（五）：Eclipse&Maven下创建java工程&web工程》）中创建的java web maven工程之上，进行pom.xml下配置安装maven命令插件。
配置之前pom.xml内容如下：
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.dx</groupId> 5 <artifactId>maven-web-project01</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>maven-web-project01 Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17 </dependencies> 18 <build> 19 <finalName>maven-web-project01</finalName> 20 </build> 21 </project>
配置之后pom.xml内容如下：
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.dx</groupId> 5 <artifactId>maven-web-project01</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>maven-web-project01 Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17 </dependencies> 18 <build> 19 <finalName>maven-web-project01</finalName> 20 <plugins> 21 <plugin> 22 <groupId>org.apache.maven.plugins</groupId> 23 <artifactId>maven-compiler-plugin</artifactId> 24 <!-- 不设置采用最新的插件版本 ，也可以去http://maven.apache.org/components/plugins/maven-compiler-plugin/找自己需要的版本号 --> 25 <version>3.1</version> 26 <configuration> 27 <!-- 源代码使用的开发版本 --> 28 <source>1.8</source> 29 <!-- 需要生成的目标class文件的编译版本 --> 30 <target>1.8</target> 31 <encoding>UTF-8</encoding> 32 </configuration> 33 </plugin> 34 </plugins> 35 </build> 36 </project>
配置之后，如果在pom.xml上右键-》Run As下包含如下截图内容，就说明安装成功。
在maven工程中执行maven命令：
我们可以基于上边的安装后maven命令插件后，测试体验下Maven install的作用，点击后控制台会打印信息：
1 [INFO] Scanning for projects... 2 [INFO] 3 [INFO] ------------------------------------------------------------------------ 4 [INFO] Building maven-web-project01 Maven Webapp 0.0.1-SNAPSHOT 5 [INFO] ------------------------------------------------------------------------ 6 [INFO] 7 [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ maven-web-project01 --- 8 [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent! 9 [INFO] Copying 0 resource 10 [INFO] 11 [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ maven-web-project01 --- 12 [INFO] Changes detected - recompiling the module! 13 [INFO] Compiling 1 source file to D:workspace4maven-web-project01 argetclasses 14 [INFO] 15 [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ maven-web-project01 --- 16 [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent! 17 [INFO] skip non existing resourceDirectory D:workspace4maven-web-project01src est esources 18 [INFO] 19 [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ maven-web-project01 --- 20 [INFO] Nothing to compile - all classes are up to date 21 [INFO] 22 [INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ maven-web-project01 --- 23 [INFO] 24 [INFO] --- maven-war-plugin:2.2:war (default-war) @ maven-web-project01 --- 25 [INFO] Packaging webapp 26 [INFO] Assembling webapp [maven-web-project01] in [D:workspace4maven-web-project01 argetmaven-web-project01] 27 [INFO] Processing war project 28 [INFO] Copying webapp resources [D:workspace4maven-web-project01srcmainwebapp] 29 [INFO] Webapp assembled in [37 msecs] 30 [INFO] Building war: D:workspace4maven-web-project01 argetmaven-web-project01.war 31 [INFO] WEB-INFweb.xml already added, skipping 32 [INFO] 33 [INFO] --- maven-install-plugin:2.4:install (default-install) @ maven-web-project01 --- 34 [INFO] Installing D:workspace4maven-web-project01 argetmaven-web-project01.war to C:UsersAdministrator.m2 epositorycomdxmaven-web-project01 .0.1-SNAPSHOTmaven-web-project01-0.0.1-SNAPSHOT.war 35 [INFO] Installing D:workspace4maven-web-project01pom.xml to C:UsersAdministrator.m2 epositorycomdxmaven-web-project01 .0.1-SNAPSHOTmaven-web-project01-0.0.1-SNAPSHOT.pom 36 [INFO] ------------------------------------------------------------------------ 37 [INFO] BUILD SUCCESS 38 [INFO] ------------------------------------------------------------------------ 39 [INFO] Total time: 3.263 s 40 [INFO] Finished at: 2017-06-28T02:16:57+08:00 41 [INFO] Final Memory: 18M/201M 42 [INFO] ------------------------------------------------------------------------