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一、问题描述
Spring项目启动，自动退出：
具体退出信息如下：
2019-11-01 11:19:22.387 INFO 19408 --- [ restartedMain] com.db.api.japi.JapiApplication : Starting JapiApplication on LAPTOP-VG0R2RSI with PID 19408 (...\japi\target\classes started by Lenovo in ...\japi)
2019-11-01 11:19:22.389 INFO 19408 --- [ restartedMain] com.db.api.japi.JapiApplication : No active profile set, falling back to default profiles: default
……
2019-11-01 11:29:43.732 INFO 9460 --- [ Thread-17] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@4906c61a: startup date [Fri Nov 01 11:29:39 CST 2019]; root of context hierarchy
2019-11-01 11:29:43.736 INFO 9460 --- [ Thread-17] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2019-11-01 11:29:43.737 INFO 9460 --- [ Thread-17] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'二、问题原因
缺少spring-boot-starter-tomcat依赖，查看pom.xml文件，发现莫名排除了这个依赖，也忘记为什么排除了。很尴尬~
<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>三、解决办法
注释掉排除的tomcat依赖就可以了
<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>四、参考
1.https://blog.csdn.net/w893932747/article/details/81297319
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