scala和java混合开发打包

如何进行scala和java混合开发打包？

首先创建maven工程，在pom.xml添加一下依赖

<properties>
		<java.version>1.8</java.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<junit.version>3.8.1</junit.version>
		<slf4j-api.version>1.6.4</slf4j-api.version>
		<commons-lang3>3.1</commons-lang3>
		<scala.version>2.11.8</scala.version>
		<maven-compiler-plugin.version>2.3.2</maven-compiler-plugin.version>
	</properties>


	<dependencies>
		<dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>
		<!-- log API -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${slf4j-api.version}</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.25</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
		   <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.1</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>net.alchim31.maven</groupId>
            <artifactId>scala-maven-plugin</artifactId>
            <version>3.2.2</version>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.0.2</version>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <classpathPrefix>lib/</classpathPrefix>
                        <mainClass>spark.example.Main</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.0.0</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${project.build.directory}/lib</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>
		</plugins>
	</build>

其中mainClass是最后打包的jar包的主函数，通常是包含main方法的scala类，你也可以不指定。

打包命令用mvn clean scala:compile package

打包之后在jar同目录下会有./lib子目录，包含scala-library-2.11.8.jar等依赖包都会在该目录。

如果依赖包在其他目录，也可以用命令：、

java -Djava.ext.dirs=c:\libs -jar my-snapshot.jar

来执行。其中-Djava.ext.dirs=c:\libs指定了依赖包路径为c:\libs，你可以换成自己的目录。

 

来源：oschina

链接：https://my.oschina.net/u/778683/blog/4271877