从pom的xsi中可以打开描述pom的schema:
可以看到pom中，project的结构：
默认的mvn install生成的jar是不带主类入口的，需要在maven-compile-plugin中设置主类，
<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.cetc.di</groupId> <artifactId>hellocetc</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>hellocetc</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <pluginManagement> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> <archive> <manifest> <mainClass>com.cetc.di.hellocetc.App</mainClass> <addClasspath>true</addClasspath> <classpathPrefix>lib/</classpathPrefix> </manifest> </archive> <classesDirectory> </classesDirectory> </configuration> </plugin> </plugins> </pluginManagement> </build> </project>
执行mvn install:
在target目录中，发现jar包已经生成：
用java decompiler，可以看到manifest中已经加入了MainClass：
使用mvn help:effective-pom可以看到pom.xml的完整结构（包括继承而来的属性）：
[INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building hellocetc 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-help-plugin:2.2:effective-pom (default-cli) @ hellocetc --- [INFO] Effective POMs, after inheritance, interpolation, and profiles are applied: <!-- ====================================================================== --> <!-- --> <!-- Generated by Maven Help Plugin on 2015-11-18T08:05:12 --> <!-- See: http://maven.apache.org/plugins/maven-help-plugin/ --> <!-- --> <!-- ====================================================================== --> <!-- ====================================================================== --> <!-- --> <!-- Effective POM for project 'com.cetc.di:hellocetc:jar:0.0.1-SNAPSHOT' --> <!-- --> <!-- ====================================================================== --> <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.cetc.di</groupId> <artifactId>hellocetc</artifactId> <version>0.0.1-SNAPSHOT</version> <name>hellocetc</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <repositories> <repository> <snapshots> <enabled>false</enabled> </snapshots> <id>central</id> <name>Central Repository</name> <url>https://repo.maven.apache.org/maven2</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <releases> <updatePolicy>never</updatePolicy> </releases> <snapshots> <enabled>false</enabled> </snapshots> <id>central</id> <name>Central Repository</name> <url>https://repo.maven.apache.org/maven2</url> </pluginRepository> </pluginRepositories> <build> <sourceDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\src\main\java</sourceDirectory> <scriptSourceDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\src\main\scripts</scriptSourceDirectory> <testSourceDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\src\test\java</testSourceDirectory> <outputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\classes</outputDirectory> <testOutputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\test-classes</testOutputDirectory> <resources> <resource> <directory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\src\main\resources</directory> </resource> </resources> <testResources> <testResource> <directory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\src\test\resources</directory> </testResource> </testResources> <directory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target</directory> <finalName>hellocetc-0.0.1-SNAPSHOT</finalName> <pluginManagement> <plugins> <plugin> <artifactId>maven-antrun-plugin</artifactId> <version>1.3</version> </plugin> <plugin> <artifactId>maven-assembly-plugin</artifactId> <version>2.2-beta-5</version> </plugin> <plugin> <artifactId>maven-dependency-plugin</artifactId> <version>2.8</version> </plugin> <plugin> <artifactId>maven-release-plugin</artifactId> <version>2.3.2</version> </plugin> <plugin> <artifactId>maven-jar-plugin</artifactId> <version>2.4</version> <configuration> <source>1.8</source> <target>1.8</target> <archive> <manifest> <mainClass>com.cetc.di.hellocetc.App</mainClass> <addClasspath>true</addClasspath> <classpathPrefix>lib/</classpathPrefix> </manifest> </archive> <classesDirectory /> </configuration> </plugin> </plugins> </pluginManagement> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>2.5</version> <executions> <execution> <id>default-clean</id> <phase>clean</phase> <goals> <goal>clean</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>2.6</version> <executions> <execution> <id>default-testResources</id> <phase>process-test-resources</phase> <goals> <goal>testResources</goal> </goals> </execution> <execution> <id>default-resources</id> <phase>process-resources</phase> <goals> <goal>resources</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-jar-plugin</artifactId> <version>2.4</version> <executions> <execution> <id>default-jar</id> <phase>package</phase> <goals> <goal>jar</goal> </goals> <configuration> <source>1.8</source> <target>1.8</target> <archive> <manifest> <mainClass>com.cetc.di.hellocetc.App</mainClass> <addClasspath>true</addClasspath> <classpathPrefix>lib/</classpathPrefix> </manifest> </archive> <classesDirectory /> </configuration> </execution> </executions> <configuration> <source>1.8</source> <target>1.8</target> <archive> <manifest> <mainClass>com.cetc.di.hellocetc.App</mainClass> <addClasspath>true</addClasspath> <classpathPrefix>lib/</classpathPrefix> </manifest> </archive> <classesDirectory /> </configuration> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <executions> <execution> <id>default-compile</id> <phase>compile</phase> <goals> <goal>compile</goal> </goals> </execution> <execution> <id>default-testCompile</id> <phase>test-compile</phase> <goals> <goal>testCompile</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.12.4</version> <executions> <execution> <id>default-test</id> <phase>test</phase> <goals> <goal>test</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.4</version> <executions> <execution> <id>default-install</id> <phase>install</phase> <goals> <goal>install</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.7</version> <executions> <execution> <id>default-deploy</id> <phase>deploy</phase> <goals> <goal>deploy</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-site-plugin</artifactId> <version>3.3</version> <executions> <execution> <id>default-site</id> <phase>site</phase> <goals> <goal>site</goal> </goals> <configuration> <outputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\site</outputDirectory> <reportPlugins> <reportPlugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-project-info-reports-plugin</artifactId> </reportPlugin> </reportPlugins> </configuration> </execution> <execution> <id>default-deploy</id> <phase>site-deploy</phase> <goals> <goal>deploy</goal> </goals> <configuration> <outputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\site</outputDirectory> <reportPlugins> <reportPlugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-project-info-reports-plugin</artifactId> </reportPlugin> </reportPlugins> </configuration> </execution> </executions> <configuration> <outputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\site</outputDirectory> <reportPlugins> <reportPlugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-project-info-reports-plugin</artifactId> </reportPlugin> </reportPlugins> </configuration> </plugin> </plugins> </build> <reporting> <outputDirectory>D:\Users\a\Workspaces\MyEclipse 2015\hellocetc\target\site</outputDirectory> </reporting> </project> [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.526 s [INFO] Finished at: 2015-11-18T20:05:12+08:00 [INFO] Final Memory: 10M/245M [INFO] ------------------------------------------------------------------------