How do I sign my jar files?

I found myself having a .spc and a .pvk file, but how do I use those for signing a JAR file?

This is how I did:

1. Open the console
2. Type pvkimport (download from http://office.microsoft.com/downloads/2000/pvkimprt.aspx)
3. Follow the onscreen wizard
4. A pck file was created
5. Now we need to know the alias that corresponds to this file
6. Type keytool -list -storetype pkcs12 -keystore mycredentials.pfx
7. You will see an output like this
   
   Keystore type: pkcs12
   Keystore provider: SunJSSE
   
   Your keystore contains 1 entry
   
   xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, May 14, 2007, keyEntry,
   Certificate fingerprint (MD5): hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh:hh
   
   
   
8. The alias is the "xxxxxxxx-xxxx-..." part
9. Sign your JARs using
   jarsigner -storetype pkcs12 -keystore mycredentials.pfx file.jar "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

Happy signing