使用Maven Spring和Kotlin创建多模块项目获得未解决的参考 [英] Creating a multi module project with maven spring and kotlin get unresolved reference
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问题描述
我正在尝试使用Kotlin和Spring构建一个多模块Maven项目.当kotlin-maven-plugin运行编译阶段时，我得到一个错误.
I am trying to build a multi module maven project with kotlin and spring. I get an error when the kotlin-maven-plugin runs the compile phase.
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:3.1.0:clean (default-clean) @ starter ---
[INFO] Deleting /Users/pnts/IdeaProjects/getyour/base/starter/target
[INFO]
[INFO] --- git-commit-id-plugin:2.2.6:revision (default) @ starter ---
[INFO]
[INFO] --- git-commit-id-plugin:2.2.6:revision (get-the-git-infos) @ starter ---
[INFO]
[INFO] --- kotlin-maven-plugin:1.3.41:compile (compile) @ starter ---
[INFO] Applied plugin: 'spring'
[ERROR] /Users/pnts/IdeaProjects/getyour/base/starter/src/main/kotlin/org/getyour/webdesign/PlainStarter.kt: (6, 9) Unresolved reference: WebsiteEntryPoint
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for parent 0.0.1-SNAPSHOT:
[INFO]
[INFO] parent ............................................. SUCCESS [ 1.178 s]
[INFO] common ............................................. SUCCESS [ 0.021 s]
[INFO] platform-api ....................................... SUCCESS [ 4.238 s]
[INFO] platform-core ...................................... SUCCESS [ 0.215 s]
[INFO] platform-bom ....................................... SUCCESS [ 0.012 s]
[INFO] platform-parent .................................... SUCCESS [ 0.061 s]
[INFO] starter ............................................ FAILURE [ 0.343 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.399 s
[INFO] Finished at: 2019-09-27T08:57:04+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.jetbrains.kotlin:kotlin-maven-plugin:1.3.41:compile (compile) on project starter: Compilation failure
[ERROR] /Users/pnts/IdeaProjects/getyour/base/starter/src/main/kotlin/org/getyour/webdesign/PlainStarter.kt:[6,9] Unresolved reference: WebsiteEntryPoint
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :starter有趣的是，当我使用"mvn clean"清理构建并运行其编译的项目并运行spring应用程序时.
The funny thing is when I clean my build with "mvn clean" and run the project it compiles and run the spring application.
我不知道是什么原因导致了这个问题.也许我想念一些东西.
I dont know what causes this issue. Maybe I am missing something.
这是我的poms和我的项目结构.希望有人可以帮助我.
Here are my poms and my project structure. Hope somebody can help me with this.
父pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.8.RELEASE</version>
<relativePath/>
</parent>
<version>0.0.1-SNAPSHOT</version>
<artifactId>parent</artifactId>
<groupId>org.getyour.webdesign</groupId>
<packaging>pom</packaging>
<modules>
<module>common</module>
<module>starter</module>
</modules>
<!-- properties -->
<properties>
<kotlin.version>1.3.41</kotlin.version>
<spring.boot.version>2.1.8.RELEASE</spring.boot.version>
<java.version>1.8</java.version>
<main.class>org.getyour.webdesign.WebsiteEntryPoint</main.class>
</properties>
<!-- repositories -->
<repositories>
<repository>
<id>maven-central</id>
<url>http://central.maven.org/maven2/</url>
</repository>
</repositories>
<build>
<sourceDirectory>src/main/kotlin</sourceDirectory>
<testSourceDirectory>src/test/kotlin</testSourceDirectory>
<pluginManagement>
<plugins>
<plugin>
<!-- Import dependency management from Spring Boot -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.version}</version>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring.boot.version}</version>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<!-- kotlin spring compiler plugin -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring.boot.version}</version>
<configuration>
<mainClass>${main.class}</mainClass>
</configuration>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<goals><goal>compile</goal></goals>
<phase>process-sources</phase>
</execution>
<execution>
<id>test-compile</id>
<goals><goal>test-compile</goal></goals>
<phase>process-test-sources</phase>
</execution>
</executions>
<configuration>
<args>
<arg>-Xjsr305=strict</arg>
</args>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>pl.project13.maven</groupId>
<artifactId>git-commit-id-plugin</artifactId>
<version>2.2.6</version>
<executions>
<execution>
<id>get-the-git-infos</id>
<goals>
<goal>revision</goal>
</goals>
</execution>
</executions>
<configuration>
<dotGitDirectory>${project.basedir}/.git</dotGitDirectory>
<prefix />
<verbose>false</verbose>
<generateGitPropertiesFile>true</generateGitPropertiesFile>
<generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties
</generateGitPropertiesFilename>
<format>properties</format>
<gitDescribe>
<skip>false</skip>
<always>false</always>
<dirty>-dirty</dirty>
</gitDescribe>
</configuration>
</plugin>
</plugins>
</build>
</project>启动器pom.xml
starter pom.xml
<?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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>parent</artifactId>
<groupId>org.getyour.webdesign</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<version>0.0.1-SNAPSHOT</version>
<artifactId>starter</artifactId>
<packaging>jar</packaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.getyour.webdesign</groupId>
<artifactId>platform-bom</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.getyour.webdesign</groupId>
<artifactId>platform-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
</dependencies>
</project>WebsiteEntryPoint.kt
WebsiteEntryPoint.kt
package org.getyour.webdesign
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
/**
* Start class of the application
*
* @author p.tsivelekidis
* Created by p.tsivelekidis on 2019-09-20
*/
@SpringBootApplication
class WebsiteEntryPoint {
companion object {
fun main(args: Array<String>) {
runApplication<WebsiteEntryPoint>(*args)
println("Hello!")
}
}
}PlainStarter.kt
PlainStarter.kt
package org.getyour.webdesign
class PlainStarter
fun main(args: Array<String>) {
WebsiteEntryPoint.main(args)
}这是我的项目结构.注意，当我运行"mvn clean install"命令时，我得到了.
Here is my project structure. Notice that when I run the "mvn clean install" command I get this.
当我清理项目并运行时，我得到了这个结构.
When I clean my project and just run I get this structure.
当我运行mvn clean install时，它不会创建目标类，因此我猜测它找不到我的WebsiteEntryPoint.
When I run the mvn clean install it does not create the target classes and I guess for that reason it cant find my WebsiteEntryPoint.
希望有人可以帮助我.非常感谢.
Hope somebody can help me with that. Thanks a lot.
推荐答案
在用intellij编译kotlin多模块项目时，我遇到了同样的问题.命令 mvn clean install 产生了与未解决的依赖项相同的错误.
i had the same issue with compiling a kotlin multi module project in intellij.
Command mvn clean install produced the same error with the unresolved dependencies.
正如我所看到的，您的源目录被命名为kotlin(与我之前的项目一样).
As i can see your source directories are named kotlin (as in my project before).
将我的项目中的源目录重命名为java后，问题已解决...
After renaming the source directories in my project to java the problem was solved...
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