To import content you can try two options:
IBM Web Content Integrator In a nutshell you need create feed
source on your existing site regarding rules that portal defines.
After that you need create consumer feed on Portal site and grab
content to WCM.
Create Portal application using WCM api and grab content from any
source you have - feed, database, files etc
To create portal pages/components(like images,files,html) you also able to use Portal/WCM api. But before import content make sure that you undestand difference between content and compoentns, and decide what you wanna create - conent or compoentns like content source. Also there is less info about creating page programmaticaly, but it possible.
If you plan to use JSR 286 portlet to display contnet, take a look on XML Import tool. This way you can automate your configuration and avoid manual confing for every page. Page confuguration - it just xml file, you always can modify this file with java and apply updated file for particular page.
UPDATE
Create portal pages programmatically
import com.ibm.portal.ModifiableMetaDataProvider;
import com.ibm.portal.content.*;
import com.ibm.portal.model.ContentModelHome;
import com.ibm.portal.model.ContentModelProvider;
import com.ibm.portal.model.controller.ContentModelControllerHome;
import com.ibm.portal.model.controller.CreationContextBuilderFactory;
import com.ibm.portal.model.controller.exceptions.CannotInstantiateControllerException;
import com.ibm.workplace.wcm.services.addressability.FriendlyURLFactoryImpl;
import com.ibm.wps.pe.pc.std.core.PortletUtils;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.portlet.*;
/**
* @author : Georgy Gobozov
* @created : 12.03.13
*/
public class PageUtil {
private static final String PREF_PARENT_PAGE = "parent.page.unique.name";
private static final String PREF_UNIQUE_PREFIX = "pages.unique.name.prefix";
public static boolean createPortalPage(String title, ActionRequest request, ActionResponse response) {
PortletPreferences prefs = request.getPreferences();
String parentPageUniqueName = prefs.getValue(PREF_PARENT_PAGE, "wps.content.root");
String uniqueNamePrefix = prefs.getValue(PREF_UNIQUE_PREFIX, "study.portal.pages.");
ContentModelController ctrl = null;
CreationContextBuilderFactory factory = null;
ContentPageCreationContext ctx = null;
ModifiableContentPage newPage = null;
ContentNode parent = null;
try {
ctrl = getController(request, response);
factory = CreationContextBuilderFactory.getInstance();
// Use the context to create the private page
ctx = factory.newContentPageCreationContext(true);
newPage = (ModifiableContentPage) ctrl.create(ContentPage.class, ctx);
newPage.setTitle(request.getLocale(), title);
// set page unique name
newPage.getModifiableObjectID().setUniqueName(uniqueNamePrefix + title);
parent = (ContentNode) ctrl.getLocator().findByUniqueName(parentPageUniqueName);
if (parent != null) {
ctrl.insert(newPage, parent, null);
// set friendly name
ModifiableMetaDataProvider mmdp = (ModifiableMetaDataProvider)ctrl.getModifiableNode(newPage);
mmdp.getModifiableMetaData().setValue("com.ibm.portal.friendly.name", title);
// Commit, i. e. persist the changes.
ctrl.commit();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != ctrl)
// Dispose the Controller.
ctrl.dispose();
}
return true;
}
public static ContentModelController getController(PortletRequest request, PortletResponse response) {
ContentModel aContentmodel = null;
ContentModelController ctrl = null;
ContentModelControllerHome home = null;
try {
Context ictx = new InitialContext();
ContentModelHome homea = (ContentModelHome) ictx.lookup("portal:service/model/ContentModel");
if (homea != null) {
ContentModelProvider provider = homea.getContentModelProvider();
PortletUtils.getInternalRequest(request).getHttpServletRequest();
//aContentmodel = provider.getContentModel((ServletRequest) request, (ServletResponse) response);
aContentmodel = provider.getContentModel(PortletUtils.getInternalRequest(request).getHttpServletRequest(), PortletUtils.getInternalResponse(response).getHttpServletResponse());
}
home = (ContentModelControllerHome) ictx.lookup(ContentModelControllerHome.JNDI_NAME);
if (home != null) {
try {
ctrl = home.getContentModelControllerProvider().createContentModelController(aContentmodel);
} catch (CannotInstantiateControllerException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return ctrl;
}
}
More useful class here