SpringBoot项目打包war包步骤

1.去除Springboot自带Tomcat
<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
</dependency>

2.添加去除Tomcat之后少了的包
<dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
 </dependency>

3.Pom.xml文件 打包方式改为war
<!--改为war方式 默认为jar-->
<packaging>war</packaging>

4. 原启动类同路径下 创建war包启动类型
/**
 * @description: 打成war包后的外置war启动类
 */
public class WarStarterApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(Application.class);
    }
}

 5.IDEA maven：先maven clean ,再install  生成war包（在项目路径下target文件夹中）