在maven项目中混合使用java和scala两种jvm语言，mavenscala,scala语言在有些场景

在maven项目中混合使用java和scala两种jvm语言，mavenscala,scala语言在有些场景

scala语言在有些场景下会大大减少代码量， 和java一样也是基于jvm的， 所以我们可以在一个项目中混合使用这两种语言。

将java源码放在src/main/java目录下， java的测试代码放在src/test/java， 将scala的源码文件放在src/main/scala目录下， 将scala测试源码放在src/test/scala目录下

然后如下配置pom文件

<?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/maven-v4_0_0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>sandbox</groupId>    <artifactId>testJavaAndScala</artifactId>    <version>1.0-SNAPSHOT</version>    <name>Test for Java + Scala compilation</name>    <description>Test for Java + Scala compilation</description>    <dependencies>        <dependency>            <groupId>org.scala-lang</groupId>            <artifactId>scala-library</artifactId>            <version>2.7.2</version>        </dependency>    </dependencies>    <build>        <pluginManagement>            <plugins>                <plugin>                    <groupId>net.alchim31.maven</groupId>                    <artifactId>scala-maven-plugin</artifactId>                    <version>3.2.1</version>                </plugin>                <plugin>                    <groupId>org.apache.maven.plugins</groupId>                    <artifactId>maven-compiler-plugin</artifactId>                    <version>2.0.2</version>                </plugin>            </plugins>        </pluginManagement>        <plugins>            <plugin>                <groupId>net.alchim31.maven</groupId>                <artifactId>scala-maven-plugin</artifactId>                <executions>                    <execution>                        <id>scala-compile-first</id>                        <phase>process-resources</phase>                        <goals>                            <goal>add-source</goal>                            <goal>compile</goal>                        </goals>                    </execution>                    <execution>                        <id>scala-test-compile</id>                        <phase>process-test-resources</phase>                        <goals>                            <goal>testCompile</goal>                        </goals>                    </execution>                </executions>            </plugin>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <executions>                    <execution>                        <phase>compile</phase>                        <goals>                            <goal>compile</goal>                        </goals>                    </execution>                </executions>            </plugin>        </plugins>    </build></project>

配置scala编译相关插件， 使用方式和纯java项目类似

# compile onlymvn compile# or compile and testmvn test# or compile, test and packagemvn package