Maven 打包的几种常用方式

一、maven-jar-plugin

默认的打包插件，用来打普通的jar 包，需建立lib目录里来存放需要的依赖包

二、maven-shade-plugin (推荐)

将依赖的jar包打包到当前jar 包，成为fat JAR包

<properties>
    <encoding>UTF-8</encoding>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <java.version>1.8</java.version>
</properties>
<build>
    <finalName>demo-flink</finalName>
    <plugins>
        <!--默认编译版本比较低，所以用compiler插件,指定项目源码的jdk版本，编译后的jdk版本和编码,-->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.1</version>
            <configuration>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <encoding>${file.encoding}</encoding>
            </configuration>
        </plugin>
        <!-- 打包插件 -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.3.0</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <!-- 压缩jar包，去除引用后没使用的jar -->
                        <!-- <minimizeJar>true</minimizeJar>-->
                        <!-- 过滤打包后的文件，在resource之后 -->
                        <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.AppendingTransformer">
                                <resource>META-INF/spring.factories</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.tooling</resource>
                            </transformer>
                            <!--运行主类-->
                            <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                <mainClass>com.baijia.usql.client.Driver</mainClass>
                            </transformer>
                        </transformers>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
    <!-- 引用的资源文件打包到哪个文件夹下 -->
    <resources>
        <resource>
            <directory>src/main/resources/meta-merge</directory>
            <includes>
                <include>**/*</include>
            </includes>
            <targetPath>META-INF/services</targetPath>
        </resource>
    </resources>
</build>

三、maven-assembly-plugin

高级打包方式，支持自定义的打包结构，比如sql/shell等

<build>
    <finalName>xdclass-flink</finalName>
    <plugins>
        <!--默认编译版本比较低，所以用compiler插件,指定项目源码的jdk版本，编译后的jdk版本和编码,-->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.1</version>
            <configuration>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <encoding>${file.encoding}</encoding>
            </configuration>
        </plugin>
        <!-- 添加依赖到jar包 -->
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>