<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);
    }
}
 
 需要類似于web.xml的配置方式來(lái)啟動(dòng)spring上下文了
 在Application類的同級(jí)添加一個(gè)SpringBootStartApplication類
 其代碼如下:

/**
 * 修改啟動(dòng)類，繼承 SpringBootServletInitializer 并重寫(xiě) configure 方法
 */
public class SpringBootStartApplication extends SpringBootServletInitializer {
 
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        // 注意這里要指向原先用main方法執(zhí)行的Application啟動(dòng)類
        return builder.sources(Application.class);
    }
}