spring - Spring Boot 应用程序未启动,也不例外
问题描述
我正在使用 Spring Boot 版本:2.3.5.RELEASE,只有我试图启动的主类。当我运行主类时,我收到以下消息并且应用程序无法启动而没有任何错误。
2020-11-03 12:39:17.871 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : Starting HealthcheckApplication on INMLTCU6LVCG with PID 15426 (/Users/rahul/Documents/Rahul/Projects/healthcheck/target/classes started by rahul in /Users/rahul/Documents/Rahul/Projects/healthcheck)
2020-11-03 12:39:17.873 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : No active profile set, falling back to default profiles: default
2020-11-03 12:39:18.617 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : Started HealthcheckApplication in 1.353 seconds (JVM running for 1.806)
Process finished with exit code 0
pom.xml 如下所示:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.rahul.poc</groupId>
<artifactId>healthcheck</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Healthcheck</name>
<description>Healthcheck POC</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<!-- <scope>test</scope>-->
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
主要类为:
package com.rahul.poc;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class HealthcheckApplication {
public static void main(String[] args) {
SpringApplication.run(HealthcheckApplication.class, args);
}
}
我没有任何其他类或配置。
解决方案
我相信您的问题是您没有添加一个启动程序包引用,该引用将服务器组件添加到您的应用程序,或者添加任何保持活动状态并执行任何操作的内容。我认为您的应用程序正在运行,然后退出,因为它尚未配置为持续运行任何内容。
导致应用程序保持运行的最常见的缺失是 Web 启动器。将此添加为 Maven 依赖项,您应该会获得更像您期望的行为:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
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