1.启用devtools插件
2.勾选Build==》compiler==》build project autoautomaticacally
3.快捷键shift+ctrl+alt+/ 勾选 compiler.automake.allow.when.app.running
4.在springboot插件配置
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
原文：https://www.cnblogs.com/alomsc/p/10884056.html