I created an weblogic portal application and some pages use composer.Did you mean WebCenter portal?
If I put an image within a page at UCM, composer put absolute URL. This pages in UCM will be transfered to other app server. Is it possible to configure composer to use relative URL?I believe it should work if you display your image via Content Presenter. Alternatively, you could also use a static resource (not from UCM), that is a part of your application as is deployed as such.