在Maven项目中运行Scala应用程序 [英] Running a scala application in maven project
问题描述
我正在尝试使用Maven处理Eclipse中的scala项目中的依赖项.但是一旦将项目转换为Maven,该应用程序将不再运行.
I am trying to use maven to handle dependencies in a scala project in Eclipse. But once the project is converted to maven, the application wont run anymore.
以下是复制步骤:
1)新的scala项目
1) new scala project
- 项目名称:测试
- 完成
2)新的scala对象
2) new scala object
- 名称:hello_world
- 完成
3)hello_world.scala
3) hello_world.scala
package test
object hello_world {
def main(args: Array[String]) {
println("Hello world !!!")
}
}
4)运行Scala应用程序
4) run scala application
- 项目:测试
- 主类:test.hello_world
结果:工作,您好,世界已打印
result : working, hello world is printed
5)正确选择项目->配置->转换为mavem项目
5) right clic on project -> configure -> convert to mavem project
- 组ID:测试
- 工件ID:测试
- 版本:0.0.1-SNAPSHOT
- 包装:罐子
- 完成
6)运行Scala应用程序
6) run scala application
- 项目:测试
- 主类:test.hello_world
结果:
Error: Could not find or load main class test.hello_world
版本详细信息:
Eclipse 4.4.1 M2E 1.5.0 适用于Eclipse 4.0.0的Scala IDE.nightly-2_11
Eclipse 4.4.1 M2E 1.5.0 Scala IDE for Eclipse 4.0.0.nightly-2_11
生成的pom-xml:
Generated pom-xml :
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
推荐答案
http://scala-tools .org/repo-releases 已过时,这是一个可运行的pom.xml:
http://scala-tools.org/repo-releases is deprecated, here is a working pom.xml :
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<repositories>
<repository>
<id>scala-tools.org</id>
<name>Scala-tools Maven2 Repository</name>
<url>https://oss.sonatype.org/content/groups/scala-tools/</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>scala-tools.org</id>
<name>Scala-tools Maven2 Repository</name>
<url>https://oss.sonatype.org/content/groups/scala-tools/</url>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.11.4</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<pluginManagement>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>maven-scala-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<executions>
<execution>
<id>scala-compile-first</id>
<phase>process-resources</phase>
<goals>
<goal>add-source</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
要运行该应用程序:
运行-> scala应用程序
run -> scala application
- 项目:测试
- 主类:test.hello_world
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