1. 各个子工程POM添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
2. 父工程POM添加依赖
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
3. IDEA的Compiler参数勾选
4. IDEA中按下"CTRL+SHIFT+ALT+/"选择Registry...
5. 重启IDEA即生效!