Maven打成可执行的jar包

在pom.xml里加这段话，和<dependencies>同级。
<build>
<pluginManagement>
  <plugins>
   <plugin>
    <groupId>org.eclipse.m2e</groupId>
    <artifactId>lifecycle-mapping</artifactId>
    <version>1.0.0</version>
     <configuration>
      <lifecycleMappingMetadata>
       <pluginExecutions>
        <pluginExecution>
         <pluginExecutionFilter>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-dependency-plugin</artifactId>
          <versionRange>[2.0,)</versionRange>
          <goals>
           <goal>copy-dependencies</goal>
           <goal>unpack</goal>
          </goals>
         </pluginExecutionFilter>
         <action>
         <ignore />
         </action>
        </pluginExecution>
       </pluginExecutions>
      </lifecycleMappingMetadata>
     </configuration>
    </plugin>
   </plugins>
  </pluginManagement>
   <plugins>
    <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-compiler-plugin</artifactId>
     <version>2.3.2</version>
     <configuration>
      <source>1.7</source>
      <target>1.7</target>
      <encoding>UTF-8</encoding>
     </configuration>
    </plugin>
    <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-jar-plugin</artifactId>
     <configuration>
      <archive>
       <manifest>
        <addClasspath>true</addClasspath>
        <classpathPrefix>lib/</classpathPrefix>
        <mainClass>com.Main</mainClass> <!--入口类 -->
       </manifest>
      </archive>
     </configuration>
    </plugin>
    <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-dependency-plugin</artifactId>
     <executions>
      <execution>
       <id>copy</id>
       <phase>install</phase>
       <goals>
        <goal>copy-dependencies</goal>
       </goals>
       <configuration> 
        <outputDirectory>${project.build.directory}/lib</outputDirectory>
       </configuration>
      </execution>
     </executions>
    </plugin>
   </plugins>
</build>
执行mvn clean install
jar内如有配置文件，最好用流的方式读取，否则很可能读取错误。
最后编写一个*.bat文件，内容如下：
@echo off
@title
java   -jar **.jar
pause


另一种方法：
<build>
<pluginManagement>
  <plugins>
   <plugin> 
    <artifactId>maven-assembly-plugin</artifactId> 
    <configuration>           
     <descriptorRefs> 
       <descriptorRef>jar-with-dependencies</descriptorRef>
     </descriptorRefs> 
     <archive> 
      <manifest> 
       <mainClass>com.Main</mainClass> <!-- 入口类  -->
      </manifest> 
     </archive> 
    </configuration> 
   </plugin>
  </plugins>
</pluginManagement>
</build>
mvn assembly:assembly
这种方法依赖的jar包会变成class