JTree：如何获取所有项目的文本？ [英] JTree: how to get the text of all items?

问题描述

我希望以格式获取JTree的文本：

I want to get text of an JTree in format:

root
  sudir1
    node1
    node2
  subdir2
    node3
    node4

是吗可能？

我写了一些代码

public static String getLastSelectedText(JTree tree) {
    DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
    if (node == null) return null;
    return node.getUserObject().toString();
}

但它只获得选定的组件文本。

But it get only selected component text.

我考虑扩展树并处理所有节点，但也许不太好主意。

I think about expand tree and handle all nodes, but maybe it bad idea.

推荐答案

我认为你不应该在一个函数中构建字符串 - 但我不知道你的问题究竟是针对什么的。

I think you shouldn't build the string within a single function - but I do not know what exactly you aim at with your question.

为了使我的答案尽可能接近你建议的功能尽可能尝试这样：

In order to keep my answer as close to your suggested function as possible you may try something like this:

TreeModel model = tree.getModel();
System.out.println(getTreeText(model, model.getRoot(), ""));

带递归函数 getTreeText

private static String getTreeText(TreeModel model, Object object, String indent) {
    String myRow = indent + object + "\n";
    for (int i = 0; i < model.getChildCount(object); i++) {
        myRow += getTreeText(model, model.getChild(object, i), indent + "  ");
    }
    return myRow;
}

getTreeText 需要三个参数

• model ：我们请求树节点的模型


• object ：我们要求字符串表示的对象（包括所有孩子）


• 缩进：缩进级别

• model: The model which we request for tree nodes
• object: The object we ask a string representation for (including all children)
• indent: indentation level

这篇关于JTree：如何获取所有项目的文本？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！