maven打包可运行的jar

一：maven-jar-plugin

<build>
    <plugins>
        <plugin>
            <artifactId>maven-jar-plugin</artifactId>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>com.xxx.xxx.Main</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>

maven-jar-plugin用于生成META-INF/MANIFEST.MF文件的部分内容

<mainClass>com.xxg.Main</mainClass>

指定MANIFEST.MF中的Main-Class

排除目录

<plugin>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <!-- jar包中排除groovy脚本目录 -->
        <excludes>
            <exclude>groovy/</exclude>
        </excludes>
    </configuration>
</plugin>

排除文件，可以用通配符

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>2.4</version>
    <configuration>
        <!-- jar包中排除这些文件 -->
        <excludes>
            <exclude>log4j.properties</exclude>
            <exclude>conf.properties</exclude>
            <exclude>system.properties</exclude>
            <exclude>logback.xml</exclude>
            <exclude>log4j2.xml</exclude>
        </excludes>
    </configuration>
</plugin>

二：maven-assembly-plugin

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.6</version>
    <configuration>
        <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
        <archive>
            <manifest>
                <mainClass>com.xxx.xxx.Main</mainClass>
            </manifest>
        </archive>
    </configuration>
    <executions>
        <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
        </execution>
    </executions>
</plugin>

这里没有指定

<descriptor>src/main/assembly/assembly.xml</descriptor>  

而是用的

<descriptorRefs>
    <descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>

这个jar-with-dependencies是assembly预先写好的一个，组装描述引用（assembly descriptor）

默认的compile scope范围是会打进jar包的，而且依赖也全部会打进去，所有有些包打完之后有可能会很大，可将scope范围改成provided，就不会打进去了。

指定打包输出的文件名

<configuration>
    <finalName>CSV转Excel工具</finalName>
    <appendAssemblyId>false</appendAssemblyId>
......

---

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常规做法

一般项目都比较大，不会打成一个jar包，一般都是打成一个tar包，里面包含启动脚本，配置文件等

使用assembly插件

一般目录结构如下：

│
└─assembly
    │  assembly.xml
    │
    ├─bin
    │      dump.sh
    │      restart.sh
    │      server.sh
    │      start.sh
    │      stop.sh
    │
    └─conf
            log4j.properties
            system.properties

pom中配置assembly 插件

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.6</version>
    <configuration>
        <descriptor>src/main/assembly/assembly.xml</descriptor>
    </configuration>
    <executions>
        <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
        </execution>
    </executions>
</plugin>

assembly.xml

<assembly>
    <id>assembly</id>
    <formats>
        <format>tar.gz</format>
    </formats>
    <includeBaseDirectory>true</includeBaseDirectory>
    <fileSets>
        <fileSet>
            <directory>src/main/assembly/bin</directory>
            <outputDirectory>bin</outputDirectory>
            <fileMode>0755</fileMode>
        </fileSet>
        <fileSet>
            <directory>src/main/assembly/conf</directory>
            <outputDirectory>conf</outputDirectory>
            <fileMode>0644</fileMode>
        </fileSet>
    </fileSets>
    <dependencySets>
        <dependencySet>
            <outputDirectory>lib</outputDirectory>
        </dependencySet>
    </dependencySets>
</assembly>