How to create dynamic web project using facets

To create a blank faceted project, you can use one of the ProjectFacetsManager.create() methods.

Once the project is created you will need to set fixed facets (those facets that the user cannot deselect (WTP sets jst.java and jst.web for the Dynamic Web Project as fixed) and set the runtime. You can do this using setFixedProjectFacets() and addTargetedRuntime() methods of IFacetedProject.

The next step is to install facets. You can do that using the modify method of IFacetedProject or the convenience method installProjectFacet.

Now your project is created and configured.

/**
	 * Install Fixed Facet,for example:jst.web
	 * @param project
	 *            the project on which to install facets
	 * @param facets
	 *            the name of the facet
	 * @param monitor
	 *            a progress monitor
	 * @throws CoreException
	 */
	public static void setFixedFacet(IProject project,String facets[],IProgressMonitor monitor) throws CoreException {
		List<IProjectFacet> list = new ArrayList<IProjectFacet>();
		IProjectFacet facet; 
		for(String str :facets ){
			facet = ProjectFacetsManager.getProjectFacet(str);
			list.add(facet);
		}
		SubMonitor.convert(monitor, 1);
		
		try {
			IFacetedProject facetedProject = ProjectFacetsManager.create(project);
			facetedProject.setFixedProjectFacets(new HashSet<IProjectFacet>(list));
		} finally {
			monitor.done();
		}
	}
	
	/**
	 * Install Facet,for example: the Java Facet.
	 * 
	 * @param project
	 *            the project on which to install facets
	 * @param facet
	 *            the name of the facet
	 * @param monitor
	 *            a progress monitor
	 * @throws CoreException
	 */
	@SuppressWarnings("deprecation")
	public static void installFacet(IProject project,String facet,IProgressMonitor monitor) throws CoreException {
		final IProjectFacet targetProjectFacet = ProjectFacetsManager.getProjectFacet(facet);
		IFacetedProject facetedProject = ProjectFacetsManager.create(project);
		
		if (!facetedProject.hasProjectFacet(targetProjectFacet)) {// settings
			SubMonitor progress = SubMonitor.convert(monitor, 1);
			try {
				progress.subTask("install facets"); //$NON-NLS-1$
				IProjectFacetVersion defaultVersion = targetProjectFacet.getDefaultVersion();
				
				facetedProject.installProjectFacet(defaultVersion, null, progress);
			} finally {
				monitor.done();
			}
		}
	}