IDEA下的SpringBoot工程的如何打包成war包

1.在pom文件下添加

<packaging>war</packaging>

2.在pom下移除tomcat插件

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <!-- 移除嵌入式tomcat插件 -->
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>

3.添加server-api依赖，（此时运行会报错，把<scope>provided</scope>去掉才能运行）

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

4.修改启动类

@SpringBootApplication
public class GuangdongApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        // 注意这里要指向原先用main方法执行的Application启动类
        return builder.sources(GuangdongApplication.class);
    }
  public static void main(String[] args) {
        SpringApplication.run(GuangdongApplication.class, args);
    }

}

5.点击菜单栏的=Bulid-Bulid Project

6.点击View勾选Tool Buttoms

7.点击侧边的Maven按钮- package

8.当控制栏下出现BUILD SUCCESS说明打包成功

 9.在target目录下即可找到生成的war包

10.war包可任意命名，然后放到tomcat目录下的webapps目录下即可部署