> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/ix.-how-to-guides/75.-embedded-web-servers/75.15-enable-multiple-listeners-with-undertow.md).

# 75.15 启用Undertow的多监听器

将`UndertowBuilderCustomizer`添加到`UndertowServletWebServerFactory`，然后使用`Builder`添加一个listener：

```java
@Bean
public UndertowServletWebServerFactory servletWebServerFactory() {
    UndertowServletWebServerFactory factory = new UndertowServletWebServerFactory();
    factory.addBuilderCustomizers(new UndertowBuilderCustomizer() {

        @Override
        public void customize(Builder builder) {
            builder.addHttpListener(8080, "0.0.0.0");
        }

    });
    return factory;
}
```