Because there was a requirement to close the port on the screen and open the same screen on another port I have to implement multiple ports in SpringBoot, which is a reminder. Only one application can be launched, and multiple port ports are created in the included Tomcat.
application.yml
server:
port : 8080
additionalPorts: 8081, 8082
EmbeddedTomcatConfiguration.java
package org.example.configuration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.catalina.connector.Connector;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class EmbeddedTomcatConfiguration implements WebMvcConfigurer {
@Value("${server.port}")
private String serverPort;
@Value("${management.port:${server.port}}")
private String managementPort;
@Value("${server.additionalPorts:null}")
private String additionalPorts;
@Bean
public WebServerFactoryCustomizer<TomcatServletWebServerFactory> servletContainer() {
return factory -> {
Connector[] additionalConnectors = additionalConnector();
if (additionalConnectors.length > 0) {
factory.addAdditionalTomcatConnectors(additionalConnectors);
}
};
}
private Connector[] additionalConnector() {
if (this.additionalPorts == null || this.additionalPorts.equals("")) {
return new Connector[0];
}
Set<String> defaultPorts = new HashSet<>(Arrays.asList(this.serverPort, this.managementPort));
String[] ports = this.additionalPorts.split(",");
List<Connector> result = new ArrayList<>();
for (String port : ports) {
if (StringUtils.hasText(port) && !"null".equalsIgnoreCase(port) && !defaultPorts.contains(port)) {
Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
connector.setScheme("http");
connector.setPort(Integer.parseInt(port.trim()));
result.add(connector);
}
}
return result.toArray(new Connector[] {});
}
}
Load the configuration class created above at startup.
BootApp.java
package org.example;
import org.example.configuration.EmbeddedTomcatConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Import;
@SpringBootApplication
@Import(EmbeddedTomcatConfiguration.class)
public class BootApp {
public static void main(String[] args) {
SpringApplication.run(BootApp.class, args);
}
}
Run it and check it on Git Bash. It's a simple Controller that just returns a string when you access the endpoint.
$ curl http://localhost:8080/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 13 100 13 0 0 149 0 --:--:-- --:--:-- --:--:-- 149
Hello World!
$ curl http://localhost:8081/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 13 100 13 0 0 812 0 --:--:-- --:--:-- --:--:-- 866
Hello World!
$ curl http://localhost:8082/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 13 100 13 0 0 866 0 --:--:-- --:--:-- --:--:-- 866
Hello World!
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