JTree实例

private void createTreeByXdDdt() {
        DefaultComboBoxModel boxModel = (DefaultComboBoxModel) cmbXdDdt.getModel();
        XdDdt xdDdt = (XdDdt) boxModel.getSelectedItem(); // 得到选中的调度台对象；
        DefaultMutableTreeNode root = new DefaultMutableTreeNode(xdDdt);
        
        List<PLthDes> pLthDesList = getPLthDesListByLthid(xdDdt.getLth()); // 根据调度台获得p_lth_des对象集合
        for (PLthDes pLthDes : pLthDesList) {
            DefaultMutableTreeNode pLthDesNode = new DefaultMutableTreeNode(pLthDes);
            List<PThNode> pThNodes = getPThNodesByIds(pLthDes.getLthid(),pLthDes.getThid()); // 根据p_lth_des获得p_th_node对象集合
            for (PThNode pThNode : pThNodes) {
                DefaultMutableTreeNode pThNodeTreeNode = new DefaultMutableTreeNode(pThNode);
                pLthDesNode.add(pThNodeTreeNode);
            }
            root.add(pLthDesNode);
        }
        DefaultTreeModel treeModel = new DefaultTreeModel(root);
        treeModel.addTreeModelListener(new TreeModelListener() {
            @Override
            public void treeStructureChanged(TreeModelEvent e) {
            }
            @Override
            public void treeNodesRemoved(TreeModelEvent e) {
            }
            @Override
            public void treeNodesInserted(TreeModelEvent e) {
            }
            @Override
            public void treeNodesChanged(TreeModelEvent e) {
                DefaultMutableTreeNode treeNode;
                TreePath treePath = tree.getSelectionPath();
                if(treePath!=null){
                    treeNode = (DefaultMutableTreeNode) treePath.getLastPathComponent();
                    Object userObject = treeNode.getUserObject();
                    System.out.println("TreeModelListener->"+userObject.getClass());
                }else{
                    System.out.println("TreeModelListener->"+"treePath is null");
                }
            }
        });
        tree.setModel(treeModel); // 设置树的model
        tree.setCellRenderer(new TreeRender()); // 设置树的渲染
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        MouseListener[] mouseListeners = tree.getMouseListeners();
        System.out.println("mouseListeners:"+mouseListeners.length);
        tree.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                DefaultMutableTreeNode treeNode;
//                TreePath treePath = tree.getPathForLocation(e.getX(), e.getY()); // 这样的话，第二次不选中就会是null
                TreePath treePath = tree.getSelectionPath(); // 这样的话，第二次不选中也会触发事件；
                if(treePath!=null){
                    treeNode = (DefaultMutableTreeNode) treePath.getLastPathComponent();
                    Object userObject = treeNode.getUserObject();
                    System.out.println("MouseClick->"+userObject.getClass());
                    if(userObject instanceof PLthDes){ 
                        PLthDes pLthDes = (PLthDes) userObject;
                        System.out.println("MouseClick->"+pLthDes.getLthid()+":"+pLthDes.getThid());
                    }
                }else{
                    System.out.println("MouseClick->"+"treePath is null");
                }
            }
        });
        MouseListener[] mouseListeners2 = tree.getMouseListeners();
        System.out.println("mouseListeners2:"+mouseListeners2.length);
        
        TreeSelectionListener[] listeners = tree.getTreeSelectionListeners();
        System.out.println("TreeSelectionListener:"+listeners.length);
        tree.addTreeSelectionListener(new TreeSelectionListener() {
            @Override
            public void valueChanged(TreeSelectionEvent e) {
                DefaultMutableTreeNode treeNode;
                TreePath treePath = tree.getSelectionPath();
                if(treePath!=null){
                    treeNode = (DefaultMutableTreeNode) treePath.getLastPathComponent();
                    Object userObject = treeNode.getUserObject();
                    System.out.println("TreeSelectionListener->"+userObject.getClass());
                }else{
                    System.out.println("TreeSelectionListener->"+"treePath is null");
                }
            }
        });
        TreeSelectionListener[] listeners2 = tree.getTreeSelectionListeners();
        System.out.println("TreeSelectionListener2:"+listeners2.length);
        
    }