/**
* 展开一棵树
*
* @param tree
*/
private void expandTree(JTree tree) {
TreeNode node = (TreeNode) tree.getModel().getRoot();
expandAll(tree, new TreePath(node), true);
}
/**
* 完全展开一棵树或关闭一棵树
*
* @param tree
* JTree
* @param parent
* 父节点
* @param expand
* true 表示展开，false 表示关闭
*/
private void expandAll(JTree tree, TreePath parent, boolean expand) {
TreeNode node = (TreeNode) parent.getLastPathComponent();
if (node.getChildCount() > 0) {
for (Enumeration e = node.children(); e.hasMoreElements();) {
TreeNode n = (TreeNode) e.nextElement();
TreePath path = parent.pathByAddingChild(n);
expandAll(tree, path, expand);
}
}
if (expand) {
tree.expandPath(parent);
} else {
tree.collapsePath(parent);
}
}
