spring boot项目打包成war在tomcat运行的全步骤

<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>

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

<dependency>
 <groupId>org.apache.tomcat</groupId>
 <artifactId>tomcat-servlet-api</artifactId>
 <version>8.0.36</version>
 <scope>provided</scope>
</dependency>

@SpringBootApplication
public class Application {
 public static void main(String[] args) {
  SpringApplication.run(Application.class, args);
 }
}

/**
 * 修改启动类，继承 SpringBootServletInitializer 并重写 configure 方法
 */
public class SpringBootStartApplication 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(Application.class);
 }
}