1,在pom.xml中引入
<dependencies>
<!-- spring-boot-devtools 依赖包 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency>
</dependencies>
<!--构建方式-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
2,在idea中设置(Settings-->Complier-->勾选Build project automatically)
3,快捷键(shift-ctrl-a)-->registry...-->勾选compiler.automake.allow.when.app.running
4,重启IDEA