项目使用maven,包含进相关jar包,
重点是在main方法,我的application:

@Encoding(input = "UTF-8", output = "UTF-8")
@Modules(scanPackage = true)
@IocBy(type = ComboIocProvider.class, args = { "*js", "ioc/", "*anno", "psyduck.me.nutz", "*tx", "*async" })
public class Application {
	private static final String NUTZ_FILTER = "nutz";

	private static final String CONTEXT_PATH = "/";

	public static void main(String[] args) throws ServletException {
		FilterInfo nutzFilter = new FilterInfo(NUTZ_FILTER, NutFilter.class);
		nutzFilter.addInitParam("modules", "psyduck.me.nutz.Application");
		
		DeploymentInfo servletBuilder = Servlets.deployment()
				.setClassLoader(DeploymentInfo.class.getClassLoader())
				.setContextPath(CONTEXT_PATH).setDeploymentName("test.war")
				.addFilter(nutzFilter)
				.addFilterUrlMapping("nutz", "/*", DispatcherType.REQUEST)
				.addFilterUrlMapping("nutz", "/*", DispatcherType.FORWARD);

		DeploymentManager manager = Servlets.defaultContainer().addDeployment(servletBuilder);
		manager.deploy();

		HttpHandler servletHandler = manager.start();
		PathHandler path = Handlers.path(Handlers.redirect(CONTEXT_PATH)).addPrefixPath(CONTEXT_PATH, servletHandler);

		Undertow server = Undertow.builder().addHttpListener(9999, "localhost").setHandler(path).build();
		server.start();

		Runtime.getRuntime().addShutdownHook(new Thread(() -> server.stop()));
	}
}

相关的import就不贴了.
这只是最基本的配置,全都是默认配置,需要修改的自己查一下文档吧.
然后是maven配置:

<build>
		<resources>
			<!-- 控制资源文件的拷贝 -->
			<resource>
				<directory>src/main/resources</directory>
				<targetPath>${project.build.directory}/classes</targetPath>
			</resource>
		</resources>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.3</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-assembly-plugin</artifactId>
				<version>2.3</version>
				<configuration>
					<appendAssemblyId>false</appendAssemblyId>
					<descriptorRefs>
						<descriptorRef>jar-with-dependencies</descriptorRef>
					</descriptorRefs>
					<archive>
						<manifest>
							<mainClass>psyduck.me.nutz.Application</mainClass>
						</manifest>
					</archive>
				</configuration>
				<executions>
					<execution>
						<id>make-assembly</id>
						<phase>package</phase>
						<goals>
							<goal>assembly</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

修改mainClass 为你的主类,然后打包运行一下试试吧.
ps:还是从springboot过来的,还是用嵌入式容器比较舒服