springboot 热启动的过程图解

热启动依赖

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-devtools</artifactId>
</dependency>

idea 默认不会进行自动编译，还需要设置 idea 自动编译

Settings>Compiler> 勾选 Build project automatically

shift+ctrl+alt+/ 打开 Registry 。勾选 compiler.automake.allow.when.app.running