1. 导入依赖，添加plugins

  <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
          <optional>true</optional>
      </dependency>
	<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>

2. setting中勾选这几项
   
3. 按住 ctrl + shift + alt + /
   选择第一个
   
   找到以下的两个并勾选
   
4. 重启idea