How to configure port for a Spring Boot application

Question

How do I configure the TCP/IP port listened on by a Spring Boot application, so it does not use the default port of 8080.

Answer 1

Include below property in application.properties

server.port=8080

Answer 2

There are many other stuffs you can alter in server configuration by changing application.properties. Like session time out, address and port etc. Refer below post

ref: http://docs.spring.io/spring-boot/docs/1.4.x/reference/html/common-application-properties.html

I used few of them as below.

server.session.timeout=1
server.port = 3029
server.address= deepesh

Answer 3

In the application.properties file, add this line:

server.port = 65535

where to place that fie:

24.3 Application Property Files

SpringApplication loads properties from application.properties files in the following locations and adds them to the Spring Environment:

A /config subdirectory of the current directory
The current directory
A classpath /config package
The classpath root

The list is ordered by precedence (properties defined in locations higher in the list override those defined in lower locations).

In my case I put it in the directory where the jar file stands.

From:

https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-external-config-application-property-files

Answer 4

There are two main ways to change the port in the Embedded Tomcat in a Spring Boot Application.

Modify application.properties

First you can try the application.properties file in the /resources folder:

server.port = 8090

Modify a VM option

The second way, if you want to avoid modifying any files and checking in something that you only need on your local, you can use a vm arg:

Go to Run -> Edit Configurations -> VM options

-Dserver.port=8090

Additionally, if you need more information you can view the following blog post here: Changing the port on a Spring Boot Application

Answer 5

also, you can configure port programmatically

@Configuration
public class ServletConfig {
    @Bean
    public EmbeddedServletContainerCustomizer containerCustomizer() {
        return (container -> {
            container.setPort(8012);
        });
    }
}

Answer 6

You can set port in java code:

HashMap<String, Object> props = new HashMap<>();
props.put("server.port", 9999);

new SpringApplicationBuilder()
    .sources(SampleController.class)                
    .properties(props)
    .run(args);

Or in application.yml:

server:
    port: 9999

Or in application.properties:

server.port=9999

Or as a command line parameter:

-Dserver.port=9999