1.新增架包

<!--支援熱啟動jar包-->
<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <version>${spring-boot.version}</version>
      <optional>true</optional>
      <!-- optional=true,依賴不會傳遞，該專案依賴devtools；之後依賴該專案的專案如果想要使用devtools，需要重新引入 
 
-->
</dependency>
<plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
      <configuration>
          <fork>true</fork>
       </configuration>
       <dependencies>
       <!--
 
 spring熱部署-->
       <!-- https://mvnrepository.com/artifact/org.springframework/springloaded -->
           <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>springloaded</artifactId>
              <version>1.2.6.RELEASE</
 
version>
          </dependency>
       </dependencies>

</plugin>

spring.devtools.restart.enabled: true

#設定重啟的目錄

#spring.devtools.restart.additional-paths: src/main/java

#classpath目錄下的WEB-INF資料夾內容修改不重啟

spring.devtools.restart.exclude: WEB-INF/**

3.IDEA配置 File-Settings-Compiler-Build Project automatically

選中 Make Project authomatically

ctrl + shift + alt + /,選擇Registry,勾上 Compiler autoMake allow when app running