maven包含Main类的项目打包

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写了一个简单的小工具想把它打包出来，使用的是maven-shade-plugin插件，这个插件会将你项目依赖的所有jar包整合到uber-jar中.

具体参看：http://www.jianshu.com/p/7a0e20b30401
刚开始的时候是这样配置的：

<plugins>    <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-shade-plugin</artifactId>        <version>2.3</version>        <executions>            <execution>                <phase>package</phase>                <goals>                        <goal>shade</goal>                </goals>                    <configuration>                        <transformers>                            <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">                                <mainClass>com.test.mqtt.Server</mainClass>                            </transformer>                        </transformers>                    </configuration>            </execution>        </executions>     </plugin> </plugins>

配置完之后clean和install操作完成之后开始尝试运行发现报了如下错误：

Error: A JNI error has occurred, please check your installation and try againException in thread "main" java.lang.SecurityException: Invalid signature file digest for Manifest main attributes        at sun.security.util.SignatureFileVerifier.processImpl(Unknown Source)        at sun.security.util.SignatureFileVerifier.process(Unknown Source)        at java.util.jar.JarVerifier.processEntry(Unknown Source)        at java.util.jar.JarVerifier.update(Unknown Source)        at java.util.jar.JarFile.initializeVerifier(Unknown Source)        at java.util.jar.JarFile.getInputStream(Unknown Source)        at sun.misc.URLClassPath$JarLoader$2.getInputStream(Unknown Source)        at sun.misc.Resource.cachedInputStream(Unknown Source)        at sun.misc.Resource.getByteBuffer(Unknown Source)        at java.net.URLClassLoader.defineClass(Unknown Source)        at java.net.URLClassLoader.access$100(Unknown Source)        at java.net.URLClassLoader$1.run(Unknown Source)        at java.net.URLClassLoader$1.run(Unknown Source)        at java.security.AccessController.doPrivileged(Native Method)        at java.net.URLClassLoader.findClass(Unknown Source)        at java.lang.ClassLoader.loadClass(Unknown Source)        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)        at java.lang.ClassLoader.loadClass(Unknown Source)        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

网上是说是打包时导致某些包的重复引用（虽然不明所以，想去看看源码但是因为懒就算了）需要加上：

<filters>       <filter>           <artifact>*:*</artifact>           <excludes>               <exclude>META-INF/*.SF</exclude>               <exclude>META-INF/*.DSA</exclude>               <exclude>META-INF/*.RSA</exclude>           </excludes>       </filter> </filters>

然后加完之后就成了这样

<build>  <plugins>    <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-shade-plugin</artifactId>        <version>2.3</version>        <executions>            <execution>                <phase>package</phase>                <goals>                        <goal>shade</goal>                </goals>                    <configuration>                        <filters>                                <filter>                                    <artifact>*:*</artifact>                                    <excludes>                                        <exclude>META-INF/*.SF</exclude>                                        <exclude>META-INF/*.DSA</exclude>                                        <exclude>META-INF/*.RSA</exclude>                                    </excludes>                                </filter>                            </filters>                        <transformers>                            <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">                                <mainClass>com.test.mqtt.Server</mainClass>                            </transformer>                        </transformers>                    </configuration>            </execution>        </executions>     </plugin>  </plugins></build>

至此问题解决

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