pom文件添加依赖包
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork><!--必须添加这个配置-->
</configuration>
</plugin>
</plugins>
</build>
settings配置搜索compiler并选中确认
window快捷键 Shift+Ctrl+Alt+/选择Registry
选中以后close 重启idea即可生效

