javax.swing.tree.TreePath 选择 XPath 查询字符串

Question

如何从选定的 TreePath 中获取相应的 XPath 查询字符串？

a
|-b
  +-c
|-b
  +-d

如果我选择“d”，我想要得到类似/a/b[2]/d 的内容

编辑:现在我想循环遍历 tree.getSelectionPath().toString().split(",") 但你将得到的信息是/a/b/d - 你无法弄清楚 b 应该是 b[2]

Answer 1

终于我明白了 - 也许其他人对解决方案感兴趣

    DefaultMutableTreeNode selected = (DefaultMutableTreeNode) tree.getSelectionPath().getLastPathComponent();

    String xpath = "";
    while (selected.getParent() != null) {
        int index = 1;
        String tag = selected.toString();
        DefaultMutableTreeNode selected2 = selected;
        while ((selected2 = selected2.getPreviousSibling()) != null) {
            if (tag.equals(selected2.toString())) index++;
        }

        xpath = "/" + tag + "[" + index + "]" + xpath;
        if (selected.getParent() == null) {
            selected = null;
        } else {
            selected = (DefaultMutableTreeNode) selected.getParent();
        }
    }

    LOG.info(xpath);