解决方法：
新建类 ServletInitializer （名字随便取）：
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Configuration;
@Configuration
public class ServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(XiaoMaWebsiteApplication.class);
}
}
然后重新打包成 war 部署即可。
