I wrote an example and found that the program exited without an event loop after execution

[bambuo]

pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.3.2</version>
</parent>

<properties>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.smartboot.servlet/smart-servlet-spring-boot-starter -->
    <dependency>
        <groupId>org.smartboot.servlet</groupId>
        <artifactId>smart-servlet-spring-boot-starter</artifactId>
        <version>1.5</version>
    </dependency>
</dependencies>

Main.java

@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class,args);
    }
}

results of enforcement

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::                (v3.3.0)

2024-07-22T15:55:57.784+08:00  INFO 17712 --- [           main] cn.krado.Main                            : Starting Main using Java 21.0.2 with PID 17712 (D:\Codes\gitee\playground-java\hello-smart\target\classes started by dtai in D:\Codes\gitee\playground-java)
2024-07-22T15:55:57.786+08:00  INFO 17712 --- [           main] cn.krado.Main                            : No active profile set, falling back to 1 default profile: "default"
2024-07-22T15:55:58.288+08:00  INFO 17712 --- [           main] cn.krado.Main                            : Started Main in 0.774 seconds (process running for 1.188)
Disconnected from the target virtual machine with address' 127.0.0.1:60210 'and transmission:' socket '

[smthing]

springboot版本太高了，试下降低版本。

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.7.18</version>
</parent>

springboot3也在适配中了。