Open a terminal and type the following command:
keytool -genkey -keystore filename.keystore -storepass mypassword -keypass mypassword -keyalg RSA -validity 180 -alias somealias -dname "cn=Name Surname,o=MyCompany,c=US"
(change the command parameters properly 
)
The command will create a self-signed certificate, stored in the .keystore file.
Copy the .keystore file to JBOSS_AS_7_HOME/standalone/configuration
Open JBOSS_AS_7_HOME/standalone/configuration/standalone.xml
Look for the following element:
<subsystem xmlns="urn:jboss:domain:web:1.0" default-virtual-server="default-host">
<connector name="http" protocol="HTTP/1.1" socket-binding="http" scheme="http"/>
<virtual-server name="default-host" enable-welcome-root="true">
<alias name="localhost"/>
<alias name="example.com"/>
</virtual-server>
</subsystem>
Change it to make it look like this:
<subsystem xmlns="urn:jboss:domain:web:1.0" default-virtual-server="default-host"> <connector name="http" protocol="HTTP/1.1" socket-binding="http" scheme="http"/> <connector name="https" protocol="HTTP/1.1" socket-binding="https" scheme="https" secure="true"> <ssl key-alias="somealias" password="mypassword" certificate-key-file="../standalone/configuration/filename.keystore" cipher-suite="ALL" protocol="TLS"/> </connector> <virtual-server name="default-host" enable-welcome-root="true"> <alias name="localhost"/> <alias name="example.com"/> </virtual-server> </subsystem>
Restart JBoss AS 7.
Notice the following lines in the console output/log:
17:45:21,689 INFO [org.apache.coyote.http11.Http11Protocol] (MSC service thread 1-4) Starting Coyote HTTP/1.1 on http--127.0.0.1-8080
17:45:22,138 INFO [org.apache.coyote.http11.Http11Protocol] (MSC service thread 1-3) Starting Coyote HTTP/1.1 on http--127.0.0.1-8443
HTTPS will be running on port 8443 by default.
To change the HTTPS port, look for the socket-binding-group element in standalone.xml
