那些遇到过的问题

在Eclipse中的Spring-boot项目中使用Maven"无法找到主类"

Ale*_*lex 33 eclipse maven spring-boot

我非常绝望,因为我不再能编译我的Maven项目.我有一个逻辑项目分成7个maven模块到目前为止编译得很好,但今天我介绍了一个功能,我不小心生成了一个循环maven依赖.因此,我重构了代码并消除了循环依赖.自从我更新了pom文件以反映我的项目不再构建的修复程序.当我使用"-X clean install"运行maven时,我得到以下java.lang.IllegalStateException:无法找到主类

[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] 
[INFO] agiletunes-parent
[INFO] agiletunes-util
[INFO] agiletunes-security-common
[INFO] agiletunes-marketing-persistence
[INFO] agiletunes-common-ui
[INFO] agiletunes-security-client
[INFO] agiletunes-marketing-application
[INFO] agiletunes-security-server
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building agiletunes-parent 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- spring-boot-maven-plugin:1.5.2.RELEASE:repackage (default) @ agiletunes-parent ---
[INFO] 
[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ agiletunes-parent ---
[INFO] Installing C:\Users\Alexander\Documents\Development\agileTunes\agiletunes-parent\pom.xml to C:\Users\Alexander\Documents\Development\mavenArtifacts\com\agiletunes\agiletunes-parent\0.0.1\agiletunes-parent-0.0.1.pom
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building agiletunes-util 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ agiletunes-util ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\Alexander\Documents\Development\agileTunes\agiletunes-util\src\main\resources
[INFO] skip non existing resourceDirectory C:\Users\Alexander\Documents\Development\agileTunes\agiletunes-util\src\main\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ agiletunes-util ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ agiletunes-util ---
[INFO] Not copying test resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ agiletunes-util ---
[INFO] Not compiling test sources
[INFO] 
[INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ agiletunes-util ---
[INFO] Tests are skipped.
[INFO] 
[INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ agiletunes-util ---
[INFO] 
[INFO] --- spring-boot-maven-plugin:1.5.2.RELEASE:repackage (default) @ agiletunes-util ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] agiletunes-parent .................................. SUCCESS [  1.492 s]
[INFO] agiletunes-util .................................... FAILURE [  1.095 s]
[INFO] agiletunes-security-common ......................... SKIPPED
[INFO] agiletunes-marketing-persistence ................... SKIPPED
[INFO] agiletunes-common-ui ............................... SKIPPED
[INFO] agiletunes-security-client ......................... SKIPPED
[INFO] agiletunes-marketing-application ................... SKIPPED
[INFO] agiletunes-security-server ......................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.674 s
[INFO] Finished at: 2017-03-21T21:53:04+01:00
[INFO] Final Memory: 31M/309M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:repackage (default) on project agiletunes-util: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:repackage failed: Unable to find main class -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:repackage (default) on project agiletunes-util: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:repackage failed: Unable to find main class
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:repackage failed: Unable to find main class
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
    ... 20 more
Caused by: java.lang.IllegalStateException: Unable to find main class
    at org.springframework.boot.loader.tools.Repackager.buildManifest(Repackager.java:354)
    at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:273)
    at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:258)
    at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:190)
    at org.springframework.boot.maven.RepackageMojo.repackage(RepackageMojo.java:212)
    at org.springframework.boot.maven.RepackageMojo.execute(RepackageMojo.java:199)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
    ... 21 more
[ERROR] 
...
Run Code Online (Sandbox Code Playgroud)

这是我的maven父项目的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>com.agiletunes</groupId>
<artifactId>agiletunes-parent</artifactId>
<version>0.0.1</version>

<packaging>pom</packaging>
<name>agiletunes-parent</name>
<description>Maven parent project of agiletunes</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.2.RELEASE</version>
    <relativePath></relativePath>
</parent>

<modules>
    <module>../agiletunes-common-ui</module>
    <module>../agiletunes-marketing-application</module>
    <module>../agiletunes-marketing-persistence</module>
    <module>../agiletunes-security-client</module>
    <module>../agiletunes-security-common</module>
    <module>../agiletunes-security-server</module>
    <module>../agiletunes-util</module>
</modules>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- Java -->
    <java.version>1.8</java.version>

    <!-- Spring -->
    <spring.boot.version>1.5.2.RELEASE</spring.boot.version>

    <!-- persistence -->
    <mysql-connector-java.version>6.0.5</mysql-connector-java.version>

    <!-- util -->
    <guava.version>17.0</guava.version>

    <!-- testing -->
    <mockito.version>1.9.5</mockito.version>

</properties>

<dependencies>

    <!-- Spring -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql-connector-java.version}</version><!--$NO-MVN-MAN-VER$ -->
        <scope>runtime</scope>
    </dependency>

    <!-- utils -->
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>${guava.version}</version>
    </dependency>

    <!-- unit test framework -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-core</artifactId>
        <version>${mockito.version}</version>
        <scope>test</scope>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
Run Code Online (Sandbox Code Playgroud)

我需要做什么来解决这个问题？如果您需要其他信息,请告诉我.先感谢您.

小智 59

你应该有这个

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
Run Code Online (Sandbox Code Playgroud)

仅在您要运行的那些模块中,而不是在父pom中.

  • 我做了这个，仍然有同样的问题 (4认同)
  • 介意解释为什么它不是从父 pom 继承的，而必须专门包含在子 pom 中吗？ (3认同)
  • 因为在多模块项目中，并非所有子模块都应该可执行。 (2认同)

小智 43

仅适用于面临类似问题的人。我spring-boot-maven-plugin在这样的部分pluginManagement部分添加了父 POM ：

 <build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </pluginManagement>
</build>
Run Code Online (Sandbox Code Playgroud)

然后我只在使用它的模块中添加了插件（in pluginsection）。之后项目已经成功构建。

Car*_*los 32

您可以尝试在pom的属性部分添加它

<start-class>your.package.main</start-class>
Run Code Online (Sandbox Code Playgroud)

小智 22

如果你在springboot项目中没有主类，你可以通过follow执行spring-boot-maven-plugin

 <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
</build>
Run Code Online (Sandbox Code Playgroud)

sas*_*_bg 15

我有同样的问题.它结束了一个实际上没有运行的子项目的spring boot mvn插件声明(没有主类).我刚刚从子模块中删除了spring boot mvn插件,一切运行正常

  • 他的意思是从父 POM 中移除 &lt;plugin&gt; &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt; &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt; &lt;/plugin&gt; 并将其添加到可运行模块的 POM 中. 谢啦 (6认同)

ali*_*ani 14

像这样添加maven属性的属性

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <start-class>org.roshan.Application</start-class>
</properties>
Run Code Online (Sandbox Code Playgroud)

  • 如果我没有主班怎么办。只是一个图书馆的罐子。 (2认同)

小智 14

在项目agiletunes-util pom.xml 中添加 

<properties>
   <spring-boot.repackage.skip>true</spring-boot.repackage.skip>
</properties>
Run Code Online (Sandbox Code Playgroud)

Ric*_*ood 7

我在pom.xml将我的数据模型分离到一个新模块中时遇到了类似的问题。

阅读这个胎面我发现我不小心把块放在<configuration><skip>true</skip></configuration>里面<executions>。下面是我更正的 pom.xml构建部分。仅供参考，有没有 <packaging>在我的条目pom.xml。

使用 Ubuntu 20.04 LTS、Java 11.0.7、maven 3.6.3、Spring Starter 2.3.2.RELEASE、IntelliJ 2020.2

我的数据模型模块的 pom.xml 的工作构建配置

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>
Run Code Online (Sandbox Code Playgroud)

小智 6

我解决了，

将以下代码添加到 pom 文件中，

<profiles>
    <profile>
        <id>profile1</id>
        <properties>
            <spring.boot.mainclass>com.detaysoft.Application</spring.boot.mainclass>
        </properties>
    </profile>
</profiles>
Run Code Online (Sandbox Code Playgroud)

然后按如下方式构建构建标记，

    <build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                    <configuration>
                        <mainClass>${spring.boot.mainclass}</mainClass>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
Run Code Online (Sandbox Code Playgroud)

归档时间：

查看次数：

56681 次

最近记录：

5 年，11 月 前
如何告诉Spring Boot哪个主类用于可执行jar？ 168
更多相关链接
相关归档
如何将SVN项目作为Java项目签入Eclipse？ 35
.settings/org.eclipse.jdt.core.prefs是项目的一部分吗？ 29
让我们解决"当前主题中找不到风格'mapViewstyle'的错误" 21
带有application.properties的spring-boot数据源配置文件 13
删除JavaDoc注释的工具？ 11
Eclipse 9和maven的Eclipse问题 7
@ConditionalOnMissingBean 不能被覆盖 6
WSDL生成可重复的构建 5
无法解析org.springframework.data.repository.PagingAndSortingRepository类型。从所需的.class文件间接引用它 5
如何在springboot中添加条件过滤器 4
难疑归档
在'for'循环中访问索引？ 3312
grep一个文件,但显示几个周围的行？ 3277
如何制作一系列功能装饰器？ 2647
将字节转换为字符串？ 1968
如何完全删除使用init创建的git存储库？ 1358
将JS对象转换为JSON字符串 1199
忽略git项目中的任何"bin"目录 1172
在HTML中嵌入PDF的推荐方法？ 1128
NP,NP-Complete和NP-Hard有什么区别？ 1064
什么是首选的Bash shebang？ 1051