myeclipse maven 打成jar包 对要执行的main方法暴露出去，通过java -jar 命令后跟打包好的jar文件回车就可以执行暴露的main线程方法

在该maven项目的pom.xml中添加：

<plugin>  
        <artifactId>maven-assembly-plugin</artifactId>  
        <configuration>  
            <archive>  
                <manifest>  
                    <mainClass>com.xha.db.service.DBService</mainClass>  
                </manifest>  
            </archive>  
            <descriptorRefs>  
                <descriptorRef>jar-with-dependencies</descriptorRef>  
            </descriptorRefs>  
        </configuration>  
    </plugin>

详情：

<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>boss</groupId>
  <artifactId>boss</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>boss</name>
  <description/>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>bean-validator</artifactId>
      <version>3.0-JBoss-4.0.2</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.enterprise.deploy</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.jms</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.management.j2ee</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.eclipse.persistence</groupId>
      <artifactId>javax.persistence</artifactId>
      <version>2.0.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.resource</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.security.auth.message</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.security.jacc</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.servlet</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.servlet.jsp</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.servlet.jsp.jstl</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.xml.bind</groupId>
      <artifactId>jaxb-api-osgi</artifactId>
      <version>2.2.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.ws.rs</groupId>
      <artifactId>jsr311-api</artifactId>
      <version>1.1.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish.web</groupId>
      <artifactId>jstl-impl</artifactId>
      <version>1.2</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
      <version>1.4.3</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.xml</groupId>
      <artifactId>webservices-api-osgi</artifactId>
      <version>2.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.jboss.weld</groupId>
      <artifactId>weld-osgi-bundle</artifactId>
      <version>1.0.1-SP3</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish.web</groupId>
      <artifactId>javax.servlet.jsp.jstl</artifactId>
      <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>3.10-FINAL</version>
    </dependency>
    
    
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>3.10-FINAL</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.20</version>
    </dependency>
   <!--  <dependency>
        <groupId>com.opencsv</groupId>
        <artifactId>opencsv</artifactId>
        <version>3.3</version>
    </dependency> -->
    <dependency>
    <groupId>net.sourceforge.javacsv</groupId>
    <artifactId>javacsv</artifactId>
    <version>2.0</version>
</dependency>

    
  </dependencies>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <resources>
      <resource>
        <directory>src</directory>
        <excludes>
          <exclude>**/*.java</exclude>
        </excludes>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <!-- <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <warSourceDirectory>${basedir}/WebRoot</warSourceDirectory>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin> -->
      
      <plugin>  
        <artifactId>maven-assembly-plugin</artifactId>  
        <configuration>  
            <archive>  
                <manifest>  
                    <mainClass>com.xha.db.service.DBService</mainClass>  
                </manifest>  
            </archive>  
            <descriptorRefs>  
                <descriptorRef>jar-with-dependencies</descriptorRef>  --打成jar包的后半段名字，
            </descriptorRefs>  
        </configuration>  
    </plugin>
      
    </plugins>
  </build>
</project>

1.右键点击maven项目，在Run As 中>Maven clear,先清理下，可能会出错，不用管

2.在菜单栏目中，如：file、edit、source、Refactor、Navigate、project、Myeclipse、Mobile、Search、Run、Windows、Help找到project>clear,清除该项目，为什么要这步，不直接执行3和4，我这边试过了，不clear，在WEB-INF下的class 所有的.java文件不会自动编译修改

3.右键点击maven项目，在Run As 中>Maven install

4.右键点击maven项目，在Run As 中>Maven build会出现窗口，在Goals 输入框中输入compile assembly:single 点击run按钮即可，在target包下找到*****jar-with-dependencies.jar,该jar包就是我们打包后所需要的jar文件