maven创建项目，打包出可执行Jar

官网参考 http://maven.apache.org/plugins/maven-assembly-plugin/assembly.html 配置多种打包方式

这个例子也不错 https://blog.csdn.net/u010010606/article/details/79758030

想弄一个maven打出来可执行的jar

mvn archetype:generate   创建一个mvn项目，输入一系列创建参数后，成功。

mvn dependency:copy-dependencies -DoutputDirectory=target/lib 可以将依赖的包导出到某个目录

然后做如下修改，加入依赖，并且为了将内容打包到执行的Jar，需要加入assembly，并制定打包后执行的主类

<?xml version="1.0" encoding="UTF-8"?>

<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.test</groupId>
  <artifactId>netty</artifactId>
  <version>1.0</version>

  <name>netty</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
    <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty-all</artifactId>
        <version>4.1.31.Final</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <appendAssemblyId>false</appendAssemblyId>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>com.test.netty.Server</mainClass>
                        </manifest>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>assembly</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

执行命令打包

mvn assembly:assembly

运行jar

java -jar ***.jar

定制打包描述文件

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4</version>
                <executions>
                    <execution>
                        <id>assemble</id>
                        <goals>
                            <goal>single</goal>
                        </goals>
                        <phase>package</phase>
                        <configuration>
                            <appendAssemblyId>false</appendAssemblyId>
                            <attach>false</attach>
                            <descriptors>
                                <descriptor>***/assembly1.xml</descriptor>
                            </descriptors>
                        </configuration>
                    </execution>
                    <execution>
                        <id>targz</id>
                        <goals>
                            <goal>single</goal>
                        </goals>
                        <phase>pre-integration-test</phase>
                        <configuration>
                            <appendAssemblyId>false</appendAssemblyId>
                            <attach>false</attach>
                            <descriptors>
                                <descriptor>***/assembly2.xml</descriptor>
                            </descriptors>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

assembly1.xml

<?xml version="1.0" encoding="UTF-8"?>
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">

    <id>tgz</id>
    <!-- 应用名-run（压缩包解压后的目录名） -->
    <baseDirectory>/</baseDirectory>
    <formats>
        <format>dir</format>
    </formats>

    <fileSets>
        <fileSet>
            <directory>src/bin</directory>
            <outputDirectory>bin</outputDirectory>
            <fileMode>0755</fileMode>
            <directoryMode>0755</directoryMode>
        </fileSet>
        <fileSet>
            <directory>src/conf</directory>
            <outputDirectory>conf</outputDirectory>
        </fileSet>
    </fileSets>
    <dependencySets>
        <dependencySet>
            <useProjectArtifact>false</useProjectArtifact>
            <!-- 运行时依赖统一放在lib目录下 -->
            <outputDirectory>lib</outputDirectory>
            <scope>runtime</scope>
        </dependencySet>
    </dependencySets>
</assembly>

assembly2.xml

<?xml version="1.0" encoding="UTF-8"?>
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">

    <id>tgz</id>
    <!-- 应用名-run（压缩包解压后的目录名） -->
    <baseDirectory>quarkservice-run-${project.version}</baseDirectory>
    <formats>
        <format>tar.gz</format>
    </formats>

    <fileSets>
        <fileSet>
            <directory>${project.build.directory}/${project.build.finalName}</directory>
            <outputDirectory>/</outputDirectory>
        </fileSet>
    </fileSets>
</assembly>