通常我們看社區(qū)源碼或者下載社區(qū)代碼安裝后發(fā)現(xiàn)，社區(qū)工程通常有bin、conf、lib等目錄，從而代碼結(jié)構(gòu)十分清晰，如何做到的呢？

首先，來看看我們平常遇到的痛點。

• 痛點一：war包大，傳輸費勁。tomcat我們相信老司機最熟悉不過，但你肯定對于最后打完的包含第三方包的war包很頭疼，每次傳輸war包好耗費很多的時間。
• 痛點二：配置打在包里，更新不便。僅僅更新一個配置文件時，都需要重新打包。

---------------華麗的分割線---------------

下面教你新建一個NB的代碼工程結(jié)構(gòu)，最終的效果便是，我們有bin（存放腳本）、conf（存放配置）、lib（存放jar包）。

• 1 新建一個maven工程：demo
• 2 工程下新建三個目錄：bin、conf、lib。
  bin下包含三個腳本：demo-start、demo-stop、demo-restart
  conf下包含一個配置模板：demo.properties.template
• 3 工程下新建若干子工程，其中包括一個叫packaging的子工程（這個是重點）
• 4 當然你還可以新建一個工程說明文檔：README.MD

image.png

pom配置：

<?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>org.jeff.r.demo</groupId>
    <artifactId>demo</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>demo-common</module>
        <module>demo-service</module>
        <module>demo-client</module>
        <module>packaging</module>
    </modules>

    <properties>
        <maven.compiler.plugin.version>3.1</maven.compiler.plugin.version>
        <maven.assembly.plugin.version>2.3</maven.assembly.plugin.version>
        <hadoop-23.version>2.7.2-2322</hadoop-23.version>
    </properties>

    <build>
        <pluginManagement>
            <plugins>
                <!--compiler setting,-->
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>${maven.compiler.plugin.version}</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>${maven.assembly.plugin.version}</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

packaging工程配置：

新建目錄assembly，并在其下建配置文件bin.xml
bin.xml

<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>bin</id>

    <formats>
        <format>tar</format>
        <format>dir</format>
    </formats>

    <baseDirectory>demo-${project.version}-bin</baseDirectory>

    <dependencySets>
        <dependencySet>
            <outputDirectory>lib</outputDirectory>
            <unpack>false</unpack>
            <useProjectArtifact>false</useProjectArtifact>
            <useStrictFiltering>true</useStrictFiltering>
            <useTransitiveFiltering>true</useTransitiveFiltering>
            <excludes>
                <exclude>org.apache.hadoop:*</exclude>
                <exclude>org.slf4j:*</exclude>
            </excludes>
        </dependencySet>
    </dependencySets>

    <fileSets>
        <fileSet>
            <directory>${project.parent.basedir}</directory>
            <excludes>
                <exclude>**/target/**</exclude>
                <exclude>**/.classpath</exclude>
                <exclude>**/.project</exclude>
                <exclude>**/.setting/**</exclude>
                <exclude>lib/**</exclude>
            </excludes>
            <includes>
                <include>README.MD</include>
            </includes>
            <outputDirectory>/</outputDirectory>
        </fileSet>

        <fileSet>
            <fileMode>755</fileMode>
            <directory>${project.parent.basedir}/conf</directory>
            <includes>
                <include>*</include>
            </includes>
            <outputDirectory>conf</outputDirectory>
        </fileSet>

        <fileSet>
            <fileMode>755</fileMode>
            <directory>${project.parent.basedir}/bin</directory>
            <includes>
                <include>demo-start.sh</include>
                <include>demo-restart.sh</include>
                <include>demo-stop.sh</include>
            </includes>
            <outputDirectory>bin</outputDirectory>
        </fileSet>
    </fileSets>

</assembly>

packaging.pom

<?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">
    <parent>
        <artifactId>demo</artifactId>
        <groupId>org.jeff.r.demo</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>packaging</artifactId>

    <profiles>
        <profile>
            <id>dist</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-assembly-plugin</artifactId>
                        <executions>
                            <execution>
                                <id>assemble</id>
                                <phase>package</phase>
                                <goals>
                                    <goal>single</goal>
                                </goals>
                                <configuration>
                                    <finalName>demo-${project.version}</finalName>
                                    <descriptors>
                                        <descriptor>src/main/assembly/bin.xml</descriptor>
                                        <!--<descriptor>src/main/assembly/src.xml</descriptor>-->
                                    </descriptors>
                                    <tarLongFileMode>gnu</tarLongFileMode>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

    <dependencies>
        <dependency>
            <groupId>org.jeff.r.demo</groupId>
            <artifactId>demo-common</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jeff.r.demo</groupId>
            <artifactId>demo-service</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jeff.r.demo</groupId>
            <artifactId>demo-client</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-common</artifactId>
            <version>2.7.2-2322</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>2.7.2-2322</version>
        </dependency>
    </dependencies>
</project>

編譯打包：

mvn clean package -DskipTests -Pdist

參考文獻:http://maven.apache.org/plugins/maven-assembly-plugin/assembly.html#class_dependencySet