执行目标 org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage failed: 找不到主类的 default-cli
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【中文标题】执行目标 org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage failed: 找不到主类的 default-cli【英文标题】：Execution default-cli of goal org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage failed: Unable to find main class 【发布时间】：2021-07-08 08:57:53 【问题描述】：我是 Springboot 新手，正在尝试重新创建我的教师应用程序，但运行时出现错误
mvn clean package spring-boot:repackage
表示它在后端模块中找不到主类。错误信息：
[INFO] 测验的根源..........................................成功 [ 0.386 秒]
[INFO] 后端 ................................... . 失败 [11.162 秒]
[INFO] 前端 ...................................跳过 [信息] --------------------------------------------- --------------------------
[信息] 构建失败 [信息] --------------------------------------------- ------------------
[错误] 无法在项目后端执行目标 org.springframework.boot:spring-boot-maven-plugin:2.4.4:repackage (default-cli)：执行目标 org.springframework.boot 的 default-cli： spring-boot-maven-plugin:2.4.4:repackage failed: Unable to find main class -> [Help 1]
运行应用程序的@Springbootapplication 主类位于前端模块中。我如何告诉应用程序？我通过在根 pom 文件中添加 springgboot-maven-plugin 尝试了these 步骤，但仍然没有运气。我还尝试减少包的数量并使 application.class 尽可能靠近 src 文件夹，尽管这些都不重要，因为它适用于我的老师。
这是我的根 pom 文件：
<?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>
<artifactId>quiz</artifactId>
<groupId>org.quiz</groupId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<name>Root of quiz</name>
<modules>
<module>backend</module>
<module>fronten</module>
</modules>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<fs>$file.separator</fs>
<version.java>11</version.java>
<version.jacoco>0.8.5</version.jacoco>
<!-- FIXME version 1.4.200 breaks tests, eg in JPA-JPQL -->
<version.h2>1.4.197</version.h2>
<version.testcontainers>1.15.1</version.testcontainers>
<version.selenium>3.141.59</version.selenium>
<version.springboot>2.3.5.RELEASE</version.springboot>
<version.junit>5.7.0</version.junit>
<version.junit.platform>1.5.2</version.junit.platform>
<!--
TODO: cannot update to 4.3+ as conflicts of major versioning
of Groovy runtime
-->
<version.surefire-failsafe>3.0.0-M4</version.surefire-failsafe>
<version.hibernate.validator>6.1.0.Final</version.hibernate.validator>
<version.hibernate.core>5.3.7.Final</version.hibernate.core>
<version.javax.el>3.0.0</version.javax.el>
<version.javax.javae.api>8.0.1</version.javax.javae.api>
<jbossTarget>$basedir/target/downloaded_Wildfly</jbossTarget>
<jbossHome>$jbossTarget/wildfly</jbossHome>
<!-- When updating this version, must also update Dockerfile using jboss/wildfly
images-->
<version.wildfly>18.0.1.Final</version.wildfly>
</properties>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<!-- SpringBoot BOM -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>$version.springboot</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>$version.springboot</version>
<scope>test</scope>
<!-- Exclude JUnit 4, which is added by default-->
<exclusions>
<exclusion>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--Hibernate-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>$version.hibernate.core</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>$version.hibernate.validator</version>
<scope>provided</scope>
</dependency>
<!-- Database -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.1.4</version>
</dependency>
<!--Containers, all needed??-->
<dependency>
<!-- Note: this has the other as dependency -->
<groupId>org.glassfish</groupId>
<artifactId>javax.el</artifactId><!--Db-->
<version>$version.javax.el</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.core</groupId>
<artifactId>arquillian-core-api</artifactId>
<version>1.5.0.Final</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.wildfly.arquillian</groupId>
<artifactId>wildfly-arquillian-container-managed</artifactId>
<version>2.2.0.Final</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<version>1.5.0.Final</version>
<!-- make sure it is in test scope -->
<scope>test</scope>
</dependency>
<!-- Junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>$version.junit</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>$version.junit</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0</version>
<exclusions>
<exclusion>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.joinfaces</groupId>
<artifactId>jsf-spring-boot-starter</artifactId>
<!--
This depends on Spring version, see:
https://github.com/joinfaces/joinfaces
However, SpringBoot 2.1 would require 4.x (eg 4.0.9) here,
but it does not work, whereas 3.2 is fine...
-->
<version>3.2.3</version>
</dependency>
<!--Selenium-->
<dependency>
<!-- used to control a browser for system testing -->
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>$version.selenium</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- used to control a browser for system testing -->
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-api</artifactId>
<version>$version.selenium</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- used to control a browser for system testing -->
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-chrome-driver</artifactId>
<version>$version.selenium</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- used to control a browser for system testing -->
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-remote-driver</artifactId>
<version>$version.selenium</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- used to control a browser for system testing -->
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-support</artifactId>
<version>$version.selenium</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- for code coverage -->
<groupId>org.jacoco</groupId>
<artifactId>org.jacoco.core</artifactId>
<version>$version.jacoco</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- To use Docker from tests -->
<groupId>org.testcontainers</groupId>
<artifactId>testcontainers</artifactId>
<version>$version.testcontainers</version>
<scope>test</scope>
</dependency>
<dependency>
<!-- To support JUnit 5 -->
<groupId>org.testcontainers</groupId>
<artifactId>junit-jupiter</artifactId>
<version>$version.testcontainers</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.testcontainers</groupId>
<artifactId>selenium</artifactId>
<version>$version.testcontainers</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-remote-driver</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<pluginManagement>
<plugins>
<plugin>
<!-- Need to create self-executable uber/fat jars for SpringBoot -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>$version.springboot</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!-- Used to download and unpack JBoss/Wildfly automatically before running the
tests-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack</id>
<phase>process-test-classes</phase>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>org.wildfly</groupId>
<artifactId>wildfly-dist</artifactId>
<version>$version.wildfly</version>
<type>zip</type>
<overWrite>false</overWrite>
<outputDirectory>$jbossTarget</outputDirectory>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
<!-- Built-in plugin used to compile Java code -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<inherited>true</inherited>
<configuration>
<release>$version.java</release>
</configuration>
</plugin>
<!-- For running ANT tasks, like renaming files/folders -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.8</version>
</plugin>
<!--
When unzipping Wildfly, the folder name will contain the version.
This is not good, as then we would need to hardcode such version
in each Arquillian file.
So, we make sure to rename such folder.
Why? If then we change Wildfly version, we only update such value
here in the pom file, and not in every single Arquillian file...
-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>Rename Wildfly folder</id>
<phase>process-test-classes</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<target>
<move file="$jbossTarget/wildfly-$version.wildfly"
tofile="$jbossTarget/wildfly"
failonerror="false"
/>
</target>
</configuration>
</execution>
</executions>
</plugin>
<!-- this is needed to run integration tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>$version.surefire-failsafe</version>
<configuration>
<forkCount>1</forkCount>
<redirectTestOutputToFile>true</redirectTestOutputToFile>
<rerunFailingTestsCount>3</rerunFailingTestsCount>
<argLine>-Xms512m -Xmx4096m</argLine>
</configuration>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Built-in plugin used to execute unit tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>$version.surefire-failsafe</version>
<configuration>
<forkCount>1</forkCount>
<redirectTestOutputToFile>true</redirectTestOutputToFile>
<rerunFailingTestsCount>3</rerunFailingTestsCount>
<argLine>-Xms512m -Xmx2048m</argLine>
</configuration>
</plugin>
<!-- Avoid failing War generation if web.xml is missing, as we ll not
use it in some example modules -->
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<!-- For cloud deployment on Heroku -->
<plugin>
<groupId>com.heroku.sdk</groupId>
<artifactId>heroku-maven-plugin</artifactId>
<version>2.0.2</version>
</plugin>
<!--code coverage-->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>$version.jacoco</version>
<executions>
<execution>
<id>default-prepare-agent</id>
<phase>initialize</phase>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>default-prepare-agent-integration</id>
<phase>package</phase>
<goals>
<goal>prepare-agent-integration</goal>
</goals>
</execution>
<execution>
<id>default-report-integration</id>
<phase>verify</phase>
<goals>
<goal>report-integration</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
这里是后端模块pom：
<?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>
<version>1.0-SNAPSHOT</version>
<parent>
<artifactId>quiz</artifactId>
<groupId>org.quiz</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>backend</artifactId>
<groupId>org.quiz.backend</groupId>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
</dependency>
<!--Springboot, versions are retrieved from springboot BOM (pom) in parent pom-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!--Database-->
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<!-- For code coverage -->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
</plugin>
<!-- Built-in plugin used to execute unit tests, (TODO: tests passes without this
too) -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<forkCount>1</forkCount>
<redirectTestOutputToFile>true</redirectTestOutputToFile>
<rerunFailingTestsCount>3</rerunFailingTestsCount>
<!--suppress UnresolvedMavenProperty -->
<argLine>$argLine -Xms512m -Xmx4096m</argLine>
</configuration>
</plugin>
</plugins>
</build>
</project>
Image of project structure (I was not allowed to post the image here)
Here is the repository I am trying to re-create
【问题讨论】：
【参考方案1】：我这里有类似的错误，我的代码没有找到主类，我在 pom.xml 文件中添加了这个属性：
<spring-boot.repackage.skip>true</spring-boot.repackage.skip>
这里一切正常。
【讨论】：
【参考方案2】：我找到了使用命令的正确方法
mvn clean package spring-boot:repackage
是导航到只包含主类的模块（在我的例子中是前端模块）然后运行
mvn 全新安装
在别人里面
【讨论】：
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