springboot——没有主清单属性

SpringBoot 打包jar运行时提示没有主清单属性问题

关于springboot打包成jar文件，然后运行java -jar命令时没有主清单属性问题，网上目前有好多种解决方案，而最尴尬的地方在于，不怎么好使，今天来搞两种能用的。

第一种方案

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <phase>repackage</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

然后

# 切换到子项目然后执行打包命令
$ cd test-package & mvn package

第二种解决方案

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

巧用IDEA，先选中该项目，然后

最终结果

$ java -jar test-package-1.0-SNAPSHOT.jar

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.3.RELEASE)

2020-09-28 16:58:08.980  INFO 23124 --- [           main] test.PackageApplication                  : Starting PackageApplication on DESKTOP-4G39J2B with PID 23124 (\demo-project\test-package\target\test-package-1.0-SNAPSH
OT.jar started by idea in \demo-project\test-package\target)
2020-09-28 16:58:08.983  INFO 23124 --- [           main] test.PackageApplication                  : No active profile set, falling back to default profiles: default
2020-09-28 16:58:09.937  INFO 23124 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-09-28 16:58:09.951  INFO 23124 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-09-28 16:58:09.951  INFO 23124 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-09-28 16:58:10.017  INFO 23124 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-09-28 16:58:10.017  INFO 23124 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 977 ms
2020-09-28 16:58:10.172  INFO 23124 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-09-28 16:58:10.323  INFO 23124 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2020-09-28 16:58:10.331  INFO 23124 --- [           main] test.PackageApplication                  : Started PackageApplication in 1.7 seconds (JVM running for 2.068)
2020-09-28 16:59:52.704  INFO 23124 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

其实基本原理相同，都是先调用package然后调用了spring-boot:repackage的plugin，经过实测，这两种解决方案确实可以正确完成springboot的打包。