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Eclipse 에서 Maven 으로 Java 와 Scala 같이 쓰기

먼저 이클립스에 scala ide 를 설치한다.

이클립스에 scala ide 설치하기

eclipse 에서 help->eclipse market place 선택->“scala”로 검색->The Scala IDE for Eclipse 의 Install 버튼 클릭->Next->I accept~ 체크->Finish->설치완료 후 eclipse 재시작

Install m2eclipse-scala

Help->Install new software-> work with 에 http://alchim31.free.fr/m2e-scala/update-site 입력 후 엔터->설치-> eclipse 재시작

(참고:http://scala-ide.org/docs/tutorials/m2eclipse/index.html)

환경설정

eclipse 에서 Window->Preferences->Scala->Compiler 에서 target 을 java 에서 사용하는 jvm 버전과 동일하게 설정. 예) jvm-1.7

pom.xml 에 추가

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<properties>
  <java.version>1.7</java.version>
  <scala-version>2.10.2</scala-version>
</properties>        
<dependencies>
  <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
      <scope>compile</scope>
      <version>${scala-version}</version>
  </dependency>
</dependencies>
<build>
  <pluginManagement>
      <plugins>
          <plugin>
              <groupId>net.alchim31.maven</groupId>
              <artifactId>scala-maven-plugin</artifactId>
              <version>3.1.6</version>
          </plugin>
          <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>2.5.1</version>
          </plugin>
      </plugins>
  </pluginManagement>
  <plugins>
      <plugin>
          <groupId>net.alchim31.maven</groupId>
          <artifactId>scala-maven-plugin</artifactId>
          <executions>
              <execution>
                  <id>scala-compile-first</id>
                  <phase>process-resources</phase>
                  <goals>
                      <goal>add-source</goal>
                      <goal>compile</goal>
                  </goals>
              </execution>
              <execution>
                  <id>scala-test-compile</id>
                  <phase>process-test-resources</phase>
                  <goals>
                      <goal>testCompile</goal>
                  </goals>
              </execution>
          </executions>
      </plugin>
      <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <configuration>
              <source>${java.version}</source>
              <target>${java.version}</target>
              <compilerArgument>-Xlint:all</compilerArgument>
              <showWarnings>true</showWarnings>
              <showDeprecation>true</showDeprecation>
          </configuration>
          
          <executions>
              <execution>
                  <phase>compile</phase>
                  <goals>
                      <goal>compile</goal>
                  </goals>
              </execution>
          </executions>
      </plugin>
     </plugins>

에러메시지 조치사항

pom.xml 에서 아래 에러 메시지 발생시

plugin execution not covered by lifecycle configuration net.alchim31

m2eclipse-scala 가 정상적으로 설치 되어있는지 확인한다.

(참고: http://stackoverflow.com/questions/13995236/avoid-eclipse-ignore-garbage-in-scala-maven-project)

updated 2013.10.4

Package Explorer 에서 Scala Library 가 포함되어 있지 않다면 Maven 에서 update project 를 한번 해준다.