1、pom文件依賴引入

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId
 
>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <
 
scope>test</scope>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration
 
>
                <fork>true</fork><!-- 如果沒有該配置，devtools不會生效 -->
            </configuration>
        </plugin>
    </plugins>
</build>

2、IDEA配置

ctrl + shift + A，輸入automatically，選擇如圖所示點擊進入

然後ctrl + shift + alt + /，選擇如下圖所示點擊進入

保存重啟，之後修改文件進行測試即可

idea springBoot 配置devtools實現熱部署