Spring Boot: Change Port for Web Application

Question

I am currently trying to create a web application with Spring Boot. I need to host my application to localhost:8081. How do I change the port?

Answer 1

If you are using the embedded tomcat server, you can configure the EmbeddedServletContainerFactory bean yourself in your Application class annotated with @SpringBootApplication.

This will give you options to customize your tomcat server, example configuration

@Bean
public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
    factory.setPort(9000);
    factory.setSessionTimeout(10, TimeUnit.MINUTES);
    factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/notfound.html"));
    return factory;
} 

You could also do the same for Jetty, using the JettyEmbeddedServletContainerFactory bean, or for Undertow using the UndertowEmbeddedServletContainerFactory .

Official documentation found here : http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/