很高兴今天成为了CSDN的专家，所以再忙也要抽空写一篇博客。最近公司有个需求要在RCP应用中用树状结构显示层级关系。我找了半天的开源框架，最后发现Eclipse REST最符合现在的需求。REST是专门用来显示图状效果的，废话少说了上效果，上代码。

public class DeviceTreeViewSWT {public static void main(String[] args) {Display d = new Display();Shell shell = new Shell(d);Image image1 = Display.getDefault().getSystemImage(SWT.ICON_INFORMATION);Image image2 = Display.getDefault().getSystemImage(SWT.ICON_WARNING);Image image3 = Display.getDefault().getSystemImage(SWT.ICON_ERROR);shell.setLayout(new FillLayout());shell.setSize(800, 800);Graph g = new Graph(shell, SWT.NONE);g.addSelectionListener(new SelectionAdapter() {public void widgetSelected(SelectionEvent e) {System.out.println(((Graph) e.widget).getSelection());}});g.setConnectionStyle(ZestStyles.CONNECTIONS_DIRECTED);GraphNode n1 = new GraphNode(g, SWT.NONE, "Virtual");n1.setBackgroundColor(new Color(d,255,0,0));GraphNode n2 = new GraphNode(g, SWT.NONE, "Shanghai");GraphNode n3 = new GraphNode(g, SWT.NONE, "Beijing");GraphNode n4 = new GraphNode(g, SWT.NONE, "AGM001");GraphNode n5 = new GraphNode(g, SWT.NONE, "AGM002");GraphNode n6 = new GraphNode(g, SWT.NONE, "AGM003");GraphNode n7 = new GraphNode(g, SWT.NONE, "AGM004");GraphNode n8 = new GraphNode(g, SWT.NONE, "AGM005");GraphNode n9 = new GraphNode(g, SWT.NONE, "AGM006");GraphNode n10 = new GraphNode(g, SWT.NONE, "AGM007");GraphNode n11 = new GraphNode(g, SWT.NONE, "AGM008");
//        class PathFigure extends PolylineConnection {
//            public PathFigure() {
//                setTargetDecoration(new PolylineDecoration());
//                setConnectionRouter(new ManhattanConnectionRouter());
//            }
//        }new GraphConnection(g, SWT.NONE, n1, n2);new GraphConnection(g, SWT.NONE, n1, n3);new GraphConnection(g, SWT.NONE, n2, n4);new GraphConnection(g, SWT.NONE, n2, n5);new GraphConnection(g, SWT.NONE, n2, n6);new GraphConnection(g, SWT.NONE, n3, n7);new GraphConnection(g, SWT.NONE, n3, n8);new GraphConnection(g, SWT.NONE, n5, n9);new GraphConnection(g, SWT.NONE, n5, n10);new GraphConnection(g, SWT.NONE, n4, n11);//g.setLayoutAlgorithm(new TreeLayoutAlgorithm(LayoutStyles.ENFORCE_BOUNDS), true);//g.setLayoutAlgorithm(new HorizontalTreeLayoutAlgorithm(LayoutStyles.ENFORCE_BOUNDS),true);g.setLayoutAlgorithm(new RadialLayoutAlgorithm(LayoutStyles.ENFORCE_BOUNDS),true);//g.setLayoutAlgorithm(new GridLayoutAlgorithm(LayoutStyles.ENFORCE_BOUNDS), true);shell.open();while (!shell.isDisposed()) {while (!d.readAndDispatch()) {d.sleep();}}image1.dispose();image2.dispose();image3.dispose();}
}

改下LayoutAlgorithm可以看到更炫的辐射状图

效果不错吧,用来显示图，树等都非常的方便

如果你用Jface封装的GraphViewer，那MVC使用起来更是方便.