1、添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
2、配置 plugin
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!-- fork: 如果没有配置该项配置,devtools不会起作用的,即应用不会resteart -->
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
3、快捷键 Shift+Ctrl+Alt+/,选择Registry,然后选中
Compiler autoMake allow when app running