错误创建多模块Maven项目

Question

我创建了一个多模块Maven项目结构如下

我打算部署RestService战争（其中我打算让我的控制器模块）和所有其他模块作为罐子。

请看以下劲歌：

家长：

<?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> 

    <groupId>com.myproject</groupId> 
    <artifactId>MyProject</artifactId> 
    <version>1.0.0-SNAPSHOT</version> 
    <packaging>pom</packaging> 

    <name>MyProject</name> 
    <description>POC</description> 

    <modules> 
     <module>RestService</module> 
     <module>CacheEngine</module> 
     <module>DataEngine</module> 
     <module>RuleEngine</module> 
    </modules> 

    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.5.1.RELEASE</version> 
     <relativePath/> <!-- lookup parent from repository --> 
    </parent> 

    <properties> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
     <java.version>1.8</java.version> 
    </properties> 

    <dependencies> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-actuator</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-actuator-docs</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-cache</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-jpa</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-mongodb</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-jdbc</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-mail</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-security</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-thymeleaf</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</artifactId> 
     </dependency> 

     <dependency> 
      <groupId>mysql</groupId> 
      <artifactId>mysql-connector-java</artifactId> 
      <scope>runtime</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.projectlombok</groupId> 
      <artifactId>lombok</artifactId> 
      <optional>true</optional> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-test</artifactId> 
      <scope>test</scope> 
     </dependency> 
    </dependencies> 

    <build> 
     <plugins> 
      <plugin> 
       <groupId>org.springframework.boot</groupId> 
       <artifactId>spring-boot-maven-plugin</artifactId> 
      </plugin> 
     </plugins> 
    </build> 


</project> 

RestService：

<?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"> 
    <parent> 
     <artifactId>MyProject</artifactId> 
     <groupId>com.myproject</groupId> 
     <version>1.0.0-SNAPSHOT</version> 
    </parent> 
    <modelVersion>4.0.0</modelVersion> 

    <artifactId>RestService</artifactId> 
    <version>1.0.0-SNAPSHOT</version> 
    <packaging>war</packaging> 

    <dependencies> 
     <dependency> 
      <groupId>com.myproject</groupId> 
      <artifactId>CacheEngine</artifactId> 
      <version>1.0.0-SNAPSHOT</version> 
     </dependency> 
    </dependencies> 

</project> 

CacheEngine：

<?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"> 
    <parent> 
     <artifactId>MyProject</artifactId> 
     <groupId>com.myproject</groupId> 
     <version>1.0.0-SNAPSHOT</version> 
    </parent> 
    <modelVersion>4.0.0</modelVersion> 

    <artifactId>CacheEngine</artifactId> 
    <packaging>jar</packaging> 
    <version>1.0.0-SNAPSHOT</version> 

</project> 

同样，对于其他模块。

当我尝试使用mvn clean install -DskipTests

它给我一个错误说没有主类CacheEngineModule

[INFO] MyProject ................................... SUCCESS [ 1.565 s] 
[INFO] CacheEngine ........................................ FAILURE [ 1.163 s] 
[INFO] RuleEngine ......................................... SKIPPED 
[INFO] DataEngine ......................................... SKIPPED 
[INFO] RestServices ....................................... SKIPPED 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 3.335 s 
[INFO] Finished at: 2017-02-15T13:19:37+05:30 
[INFO] Final Memory: 30M/229M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.1.RELEASE:repackage (default) on project CacheEngine: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.1.RELEASE:repackage failed: Unable to find main class -> [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/PluginExecutionException 
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command 
[ERROR] mvn <goals> -rf :CacheEngine 

Answer 1

发现移动部分

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId> 
     </plugin> 
    </plugins> 
</build> 

到的POM以建设模块，你想建立一个可执行文件。 （在你的情况下可能是RestService pom）。当它位于项目的父pom中时，spring-boot-maven-plugin将尝试从每个子模块创建一个可执行jar。