使用虚拟表和虚拟树的确可以很大程度地提供UI界面的性能,尤其是在大数据量的情况下，对于TableViewer使用虚拟表很简单，只要在创建TableViewer的时候指定SWT.VIRTUAL即可

tableViewer = new TableViewer(container, SWT.FULL_SELECTION
 | SWT.BORDER | SWT.HIDE_SELECTION | SWT.VIRTUAL);

在以前的版本， TableViewer要使用virtual table的时候，需要实现ILazyContentProvider接口，但是目前好像是不用了，下面附上两个eclipse社区提供的例子

Snippet030VirtualLazyTableViewer.java,使用的是实现 ILazyContentProvider接口
import org.eclipse.jface.viewers.ILazyContentProvider;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;

 /**
* A simple TableViewer to demonstrate usage of an ILazyContentProvider. You can compare this snippet to the Snippet029VirtualTableViewer
* to see the small but needed difference.
*
* @author Tom Schindl <[email protected]>
*
 */
public class Snippet030VirtualLazyTableViewer {
 private class MyContentProvider implements IStructuredContentProvider, ILazyContentProvider {
 private TableViewer viewer;
 private MyModel[] elements;

 public MyContentProvider(TableViewer viewer) {
 this .viewer = viewer;
}

 /* (non-Javadoc)
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
 */
public Object[] getElements(Object inputElement) {
 return elements;
}

 /* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
 */
public void dispose() {

}

 /* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
 */
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 this .elements = (MyModel[])newInput;
}

 public void updateElement( int index) {
viewer.replace(elements[index], index);
}

}

 public class MyModel {
 public int counter;

 public MyModel( int counter) {
 this .counter = counter;
}

 public String toString() {
 return " Item " + this .counter;
}
}

 public Snippet030VirtualLazyTableViewer(Shell shell) {
 final TableViewer v = new TableViewer(shell,SWT.VIRTUAL);
v.setLabelProvider( new LabelProvider());
v.setContentProvider( new MyContentProvider(v));
v.setUseHashlookup( true );
MyModel[] model = createModel();
v.setInput(model);
v.setItemCount(model.length); // This is the difference when using a ILazyContentProvider

v.getTable().setLinesVisible( true );
}

 private MyModel[] createModel() {
MyModel[] elements = new MyModel[ 10000 ];

 for ( int i = 0 ; i < 10000 ; i ++ ) {
elements[i] = new MyModel(i);
}

 return elements;
}

 /**
* @param args
 */
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell(display);
shell.setLayout( new FillLayout());
 new Snippet030VirtualLazyTableViewer(shell);
shell.open ();

 while ( ! shell.isDisposed ()) {
 if ( ! display.readAndDispatch ()) display.sleep ();
}

display.dispose ();

}

}

Snippet029VirtualTableViewer.java 更加方便，直接指定SWT.VIRTUAL即可
import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;

 /**
* A simple TableViewer to demonstrate the usage of a standard content provider
* with a virtual table
*
* @author Tom Schindl <[email protected]>
*
 */
public class Snippet029VirtualTableViewer {
 private class MyContentProvider implements IStructuredContentProvider {
 private MyModel[] elements;

 /*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
 */
public Object[] getElements(Object inputElement) {
 return elements;
}

 /*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
 */
public void dispose() {

}

 /*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
* java.lang.Object, java.lang.Object)
 */
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 this .elements = (MyModel[]) newInput;
}
}

 public class MyModel {
 public int counter;

 public MyModel( int counter) {
 this .counter = counter;
}

 public String toString() {
 return " Item " + this .counter;
}
}

 public Snippet029VirtualTableViewer(Shell shell) {
 long time1 = System.currentTimeMillis();
 final TableViewer v = new TableViewer(shell,SWT.VIRTUAL);
v.setLabelProvider( new LabelProvider());
v.setContentProvider( new MyContentProvider());
v.setUseHashlookup( true );
MyModel[] model = createModel();
v.setInput(model);

v.getTable().setLinesVisible( true );
System.out.println(System.currentTimeMillis() - time1);
}

 private MyModel[] createModel() {
MyModel[] elements = new MyModel[ 10000 ];

 for ( int i = 0 ; i < 10000 ; i ++ ) {
elements[i] = new MyModel(i);
}

 return elements;
}

 /**
* @param args
 */
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout( new FillLayout());
 new Snippet029VirtualTableViewer(shell);
shell.open();

 while ( ! shell.isDisposed()) {
 if ( ! display.readAndDispatch())
display.sleep();
}

display.dispose();

}

}