maven 生成的jar文件指定main class

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>zhch.illq.time</groupId>
  <artifactId>time_tool</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>time_tool</name>
  <url>http://maven.apache.org</url>
  <!-- 指定属性 -->
  <properties>
    <cxf.version>2.2.8</cxf.version>
    <spring.version>3.0.2.RELEASE</spring.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-jar-plugin</artifactId>
				<configuration>
					<archive>
						<manifest>
							<mainClass>zhch.illq.time.TimeTool</mainClass>
						</manifest>
					</archive>
				</configuration>
			</plugin>
		</plugins>
	</build>
  
</project>

jar 命令:
假设现在是在classes目录的同级目录中

jar cvef zhch.illq.time.TimeTool timetool.jar -C classes . 

-C 是指定要打包的目录
. (点) 是文件,表示当前目录,这样就把classes目录中及子目录中所有文件打包
参数e f 分别指定main class和生成的jar文件名, 后面要按顺序来
也可以写成这样

jar cvfe timetool.jar zhch.illq.time.TimeTool -C classes .