一、命名包名为war

<packaging>war</packaging>

二、配置war包

1.引入war依赖

 <!--打war-->
<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
</plugin>

打war可以给war包定义名称

<finalName>xiao</finalName>

2.在启动类加SpringApplicationBuilder configure方法

 protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
            return application.sources(com.xiao.demo.DemoApplication.class);
        }

 这是war包配置就完成了。如何打war包出错可以参考这篇文章：https://blog.csdn.net/m0_55955242/article/details/119653444https://blog.csdn.net/m0_55955242/article/details/119653444https://blog.csdn.net/m0_55955242/article/details/119653444