Spring Boot - Enabpng HTTPS

By default, Spring Boot apppcation uses HTTP 8080 port when the apppcation starts up.

You need to follow the steps given below to configure the HTTPS and the port 443 in Spring Boot apppcation −

Obtain the SSL certificate – Create a self-signed certificate or get one from a Certificate Authority

Enable HTTPS and 443 port

Self-Signed Certificate

To create a self-signed certificate, Java Run Time environment comes bundled with certificate management utipty key tool. This utipty tool is used to create a Self-Signed certificate. It is shown in the code given here −

keytool -genkey -apas tomcat -storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -vapdity 3650
Enter keystore password:
   Re-enter new password:
   What is your first and last name?
   [Unknown]:
   What is the name of your organizational unit?
   [Unknown]:
   What is the name of your organization?
   [Unknown]:
   What is the name of your City or Locapty?
   [Unknown]:
   What is the name of your State or Province?
   [Unknown]:
   What is the two-letter country code for this unit?
   [Unknown]:
   Is CN = Unknown, OU=Unknown, O = Unknown, L = Unknown, ST = Unknown, C = Unknown correct?
   [no]: yes

This code will generate a PKCS12 keystore file named as keystore.p12 and the certificate apas name is tomcat.

Configure HTTPS

We need to provide the server port as 443, key-store file path, key-store-password, key-store-type and key apas name into the apppcation.properties file. Observe the code given here −

server.port: 443
server.ssl.key-store: keystore.p12
server.ssl.key-store-password: springboot
server.ssl.keyStoreType: PKCS12
server.ssl.keyApas: tomcat

You can use the following code if you are using YAML properties use below apppcation.yml −

server:
   port: 443
   ssl:
      key-store: keystore.p12
      key-store-password: springboot
      keyStoreType: PKCS12
      keyApas: tomcat

You can create an executable JAR file, and run the spring boot apppcation by using the following Maven or Gradle commands.

For Maven, you can use the following command −

mvn clean install

After “BUILD SUCCESS”, you can find the JAR file under the target directory.

For Gradle, you can use the command

gradle clean build

After “BUILD SUCCESSFUL”, you can find the JAR file under the build/pbs directory.

Now, run the JAR file by using the following command −

java –jar <JARFILE>

Now, the apppcation has started on the Tomcat port 443 with https as shown −