在java中生成和保存EMF模型

package org.eclipse.example.library;

import java.io.IOException;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.ETypedElement;
import org.eclipse.emf.ecore.EcoreFactory;
import org.eclipse.emf.ecore.EcorePackage;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.impl.XMLResourceFactoryImpl;

public class EMFTest {

	public static void main(String[] args) throws IOException {
		EcoreFactory ecoreFactory = EcoreFactory.eINSTANCE;
		EClass purchaseOrderClass = ecoreFactory.createEClass();
		purchaseOrderClass.setName("PurchaseOrder");
		EAttribute shipTo = ecoreFactory.createEAttribute();
		shipTo.setName("shipTo");
		shipTo.setEType(EcorePackage.Literals.ESTRING);
		purchaseOrderClass.getEStructuralFeatures().add(shipTo);
		EAttribute billTo = ecoreFactory.createEAttribute();
		billTo.setName("billTo");
		billTo.setEType(EcorePackage.Literals.ESTRING);
		purchaseOrderClass.getEStructuralFeatures().add(billTo);
		EClass itemClass = ecoreFactory.createEClass();
		itemClass.setName("Item");
		EAttribute productName = ecoreFactory.createEAttribute();
		productName.setName("productName");
		productName.setEType(EcorePackage.Literals.ESTRING);
		itemClass.getEStructuralFeatures().add(productName);
		EAttribute quantity = ecoreFactory.createEAttribute();
		quantity.setName("quantity");
		quantity.setEType(EcorePackage.Literals.EINT);
		itemClass.getEStructuralFeatures().add(quantity);
		EAttribute price = ecoreFactory.createEAttribute();
		price.setName("price");
		price.setEType(EcorePackage.Literals.EFLOAT);
		itemClass.getEStructuralFeatures().add(price);
		EReference items = ecoreFactory.createEReference();
		items.setName("items");
		items.setEType(itemClass);
		items.setUpperBound(ETypedElement.UNBOUNDED_MULTIPLICITY);
		items.setContainment(true);
		purchaseOrderClass.getEStructuralFeatures().add(items);
		EPackage poPackage = ecoreFactory.createEPackage();
		poPackage.setName("po");
		poPackage.setNsPrefix("po");
		poPackage.setNsURI("http://www.example.com/SimplePO");
		poPackage.getEClassifiers().add(purchaseOrderClass);
		poPackage.getEClassifiers().add(itemClass);

		ResourceSet metaResourceSet = new ResourceSetImpl();

		metaResourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap()
				.put("ecore", new XMLResourceFactoryImpl());

		Resource metaResource = metaResourceSet.createResource(URI
				.createURI("file:///d:/bookStore.ecore"));

		metaResource.getContents().add(poPackage);

		try {
			metaResource.save(null);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

参考：
http://www.ibm.com/developerworks/library/os-eclipse-dynamicemf/