blocks|key|4631718|text|在pom中添加start类：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4631719|<properties>
++++
++++<start-class>com.mycorp.starter.HelloWorldApplication</start-class>
</properties>|code-block|syntax|javascript|4631720|或|4631721|<build>
<plugins>
++++<plugin>
++++++++<groupId>org.springframework.boot</groupId>
++++++++<artifactId>spring-boot-maven-plugin</artifactId>+++++++++++++
++++++++<configuration>++++
++++++++++++<mainClass>com.mycorp.starter.HelloWorldApplication</mainClass>
++++++++</configuration>
++++</plugin>
</plugins>
</build>|4631722|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Add your start class in your pom:

<pre><code>&lt;properties&gt;
 &lt;!-- The main class to start by executing java -jar --&gt;
 &lt;start-class&gt;com.mycorp.starter.HelloWorldApplication&lt;/start-class&gt;
&lt;/properties&gt;
</code></pre>

or 

<pre><code>&lt;build&gt;
&lt;plugins&gt;
 &lt;plugin&gt;
 &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
 &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt; 
 &lt;configuration&gt; 
 &lt;mainClass&gt;com.mycorp.starter.HelloWorldApplication&lt;/mainClass&gt;
 &lt;/configuration&gt;
 &lt;/plugin&gt;
&lt;/plugins&gt;
&lt;/build&gt;
</code></pre>

blocks|key|4631752|text|如果您不使用spring-boot-starter-parent+pom，那么从Spring+documentation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4631753|<plugin>
++++<groupId>org.springframework.boot</groupId>
++++<artifactId>spring-boot-maven-plugin</artifactId>
++++<version>1.1.3.RELEASE</version>
++++<configuration>
++++++++<mainClass>my.package.MyStartClass</mainClass>
++++++++<layout>ZIP</layout>
++++</configuration>
++++<executions>
++++++++<execution>
++++++++++++<goals>
++++++++++++++++<goal>repackage</goal>
++++++++++++</goals>
++++++++</execution>
++++</executions>
</plugin>|code-block|syntax|javascript|4631754|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.spring.io/spring-boot/docs/1.0.1.RELEASE/reference/html/build-tool-plugins-maven-plugin.html#build-tool-plugins-maven-packaging-optional-params^0|14|K|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

If you do NOT use the spring-boot-starter-parent pom, then from the <a href="http://docs.spring.io/spring-boot/docs/1.0.1.RELEASE/reference/html/build-tool-plugins-maven-plugin.html#build-tool-plugins-maven-packaging-optional-params">Spring documentation</a>:

<pre><code>&lt;plugin&gt;
 &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
 &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
 &lt;version&gt;1.1.3.RELEASE&lt;/version&gt;
 &lt;configuration&gt;
 &lt;mainClass&gt;my.package.MyStartClass&lt;/mainClass&gt;
 &lt;layout&gt;ZIP&lt;/layout&gt;
 &lt;/configuration&gt;
 &lt;executions&gt;
 &lt;execution&gt;
 &lt;goals&gt;
 &lt;goal&gt;repackage&lt;/goal&gt;
 &lt;/goals&gt;
 &lt;/execution&gt;
 &lt;/executions&gt;
&lt;/plugin&gt;
</code></pre>

blocks|key|125674|text|对于使用Gradle+(而不是Maven)的用户：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125675|springBoot+{
++++mainClass+=+"com.example.Main"
}|code-block|syntax|javascript|125676|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For those using Gradle (instead of Maven) :

<pre><code>springBoot {
 mainClass = "com.example.Main"
}
</code></pre>

blocks|key|125699|text|如果您在pom中使用spring-boot-starter-parent，只需在pom中添加以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125700|<build>
++++<plugins>
++++++++<plugin>
++++++++++++<groupId>org.springframework.boot</groupId>
++++++++++++<artifactId>spring-boot-maven-plugin</artifactId>
++++++++</plugin>
++++</plugins>
</build>|code-block|syntax|javascript|125701|然后做你的mvn包。|125702|参见this+Spring+docs+page。|offset|length|125703|这里要提到的一个非常重要的方面是，目录结构必须是src/main/java/java+very|125704|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.spring.io/spring-boot/docs/1.2.5.RELEASE/reference/html/getting-started-first-application.html#getting-started-first-application-executable-jar^0|0|0|0|2|L|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$K|10|L|11|1|12]]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

If you're using spring-boot-starter-parent in your pom, you simply add the following to your pom:

<pre class="lang-xml prettyprint-override"><code>&lt;build&gt;
 &lt;plugins&gt;
 &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;
 &lt;/plugins&gt;
&lt;/build&gt;
</code></pre>

Then do your mvn package.

See <a href="http://docs.spring.io/spring-boot/docs/1.2.5.RELEASE/reference/html/getting-started-first-application.html#getting-started-first-application-executable-jar" rel="noreferrer">this Spring docs page</a>.

A very important aspect here is to mention that the directory structure has to be src/main/java/nameofyourpackage

blocks|key|125758|text|我已经重命名了我的项目，但它仍然在构建路径上找到旧的Application类。我在'build‘文件夹中删除了它，一切都很好。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|125759|entityMap^0|Q|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I had renamed my project and it was still finding the old <code>Application</code> class on the build path. I removed it in the 'build' folder and all was fine.

blocks|key|4631889|text|我在pom.xml中尝试了下面的代码，它对我很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4631890|<build>
<plugins>
++++<plugin>
++++++++<groupId>org.springframework.boot</groupId>
++++++++<artifactId>spring-boot-maven-plugin</artifactId>
++++++++<configuration>
++++++++++++<mainClass>myPackage.HelloWorld</mainClass>+
++++++++</configuration>
++++</plugin>
++++<plugin>
++++++++<artifactId>maven-compiler-plugin</artifactId>
++++++++<configuration>
++++++++++++<fork>true</fork>
++++++++++++<executable>D:\jdk1.8\bin\javaw.exe</executable>
++++++++</configuration>
++++</plugin>
</plugins>|code-block|syntax|javascript|4631891|​|4631892|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I tried the following code in pom.xml and it worked for me

<pre><code>&lt;build&gt;
&lt;plugins&gt;
 &lt;plugin&gt;
 &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
 &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
 &lt;configuration&gt;
 &lt;mainClass&gt;myPackage.HelloWorld&lt;/mainClass&gt; 
 &lt;/configuration&gt;
 &lt;/plugin&gt;
 &lt;plugin&gt;
 &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
 &lt;configuration&gt;
 &lt;fork&gt;true&lt;/fork&gt;
 &lt;executable&gt;D:\jdk1.8\bin\javaw.exe&lt;/executable&gt;
 &lt;/configuration&gt;
 &lt;/plugin&gt;
&lt;/plugins&gt;
</code></pre>

blocks|key|125837|text|从Spring+Boot1.5开始，您可以完全忽略pom或build.gradle中容易出错的字符串文字。重新打包工具(通过maven或gradle插件)将为您挑选带有@SpringBootApplication注释的文档。(有关详细信息，请参阅本期：https://github.com/spring-projects/spring-boot/issues/6496+)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|125838|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/spring-projects/spring-boot/issues/6496^0|2C|M|3I|1M|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Since Spring Boot 1.5, you can complete ignore the error-prone string literal in pom or build.gradle. The repackaging tool (via maven or gradle plugin) will pick the one annotated with <code>@SpringBootApplication</code> for you. (Refer to this issue for detail: <a href="https://github.com/spring-projects/spring-boot/issues/6496" rel="noreferrer">https://github.com/spring-projects/spring-boot/issues/6496</a> )

blocks|key|4631999|text|我在Java1.9和SpringBoot+1.5.x中看到过这个问题，当没有显式指定主类时。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4632000|在Java+1.8中，它能够找到没有显式属性的main-class，'mvn+package‘工作得很好。|4632001|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Have seen this issue with Java 1.9 and SpringBoot 1.5.x, when main-class is not specified explicitly.

With Java 1.8, it is able to find main-class without explicit property and 'mvn package' works fine.

blocks|key|125920|text|如果您使用的是等级，可以应用'application'+plugin而不是“java”插件。这允许在不使用任何Spring+Boot+Gradle插件任务的情况下如下指定主类。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|125921|plugins+{
++id+'org.springframework.boot'+version+'2.3.3.RELEASE'
++id+'io.spring.dependency-management'+version+'1.0.10.RELEASE'
++id+'application'
}
application+{
++mainClassName+=+'com.example.ExampleApplication'
}|code-block|syntax|javascript|125922|一个很好的好处是，可以使用Gradle自动配置类路径的gradle+run来运行应用程序。该插件还将应用程序打包为TAR和/或ZIP，包括特定于操作系统的启动脚本。|style|CODE|125923|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.gradle.org/current/userguide/application_plugin.html^0|E|K|0|0|0|R|A|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$A|10|B|11|K|L]]|9|@]|C|$]]|$1|M|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

If you are using Grade, it is possible to apply the <a href="https://docs.gradle.org/current/userguide/application_plugin.html" rel="nofollow noreferrer">'application' plugin</a> rather than the 'java' plugin. This allows specifying the main class as below without using any Spring Boot Gradle plugin tasks.
<pre><code>plugins {
 id 'org.springframework.boot' version '2.3.3.RELEASE'
 id 'io.spring.dependency-management' version '1.0.10.RELEASE'
 id 'application'
}
application {
 mainClassName = 'com.example.ExampleApplication'
}
</code></pre>
As a nice benefit, one is able to run the application using <code>gradle run</code> with the classpath automatically configured by Gradle. The plugin also packages the application as a TAR and/or ZIP including operating system specific start scripts.

<pre><code>Execution default of goal 
org.springframework.boot:spring-boot-maven-plugin:1.0.1.RELEASE:repackage 
failed: 
Unable to find a single main class from the following candidates
</code></pre>

My project has more than one class with a <code>main</code> method. How do I tell the Spring Boot Maven plugin which of the classes it should use as the main class?

How do I tell Spring Boot which main class to use for the executable jar?

Spring Boot

Java

Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.0.1.RELEASE:repackage failed: Unable to find a single main class from the followin...

问如何告诉Spring Boot将哪个主类用于可执行jar？
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