Java、Scala混写maven打包报错

问题描述：

java、scala混用的情况下，maven打包，遇到找不到符号的报错

原因：

若在java代码中调用了scala代码，则需先编译scala代码，后编译java代码。

解决方法（亲测）：

<build>
    <plugins>
        <plugin>
            <groupId>org.scala-tools</groupId>
            <artifactId>maven-scala-plugin</artifactId>
            <version>2.15.2</version>
            <executions>
                <execution>
                    <id>compile-scala</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>add-source</goal>
                        <goal>compile</goal>
                    </goals>
                </execution>
                <execution>
                    <id>test-compile-scala</id>
                    <phase>test-compile</phase>
                    <goals>
                        <goal>add-source</goal>
                        <goal>testCompile</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <scalaVersion>2.11.0</scalaVersion>
                <recompileMode>incremental</recompileMode>
                <args>
                    <arg>-unchecked</arg>
                    <arg>-deprecation</arg>
                    <arg>-feature</arg>
                </args>
            </configuration>
        </plugin>
        <plugin>
            <groupId>net.alchim31.maven</groupId>
            <artifactId>scala-maven-plugin</artifactId>
            <version>3.2.2</version>
            <executions>
                <execution>
                    <id>compile-scala</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>add-source</goal>
                        <goal>compile</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
    </build>