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

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!--fork :  如果没有该项配置devtools不会起作用，即应用不会restart -->
                    <fork>true</fork>
                    <addResources>true</addResources><!--支持静态文件热部署-->
                </configuration>
            </plugin>