使用Java中的Jtree和File列出文件和目录 [英] List files and directories with Jtree and File in Java
本文介绍了使用Java中的Jtree和File列出文件和目录的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想用JTree创建一个非常非常简单的文件管理器,但是我只看到了一个非常困难的代码,并且我想非常简洁地创建此脚本.
I want to create a very very simple file manager with JTree, but I only saw a very hard code and I want to create this script very clean and simple.
你能帮我吗?如何在JTree中列出计算机的目录?
Can you help me? How do I List the directories of my computer in JTree?
推荐答案
我写了一个我能想到的最简单的文件浏览器示例.它列出了Windows计算机上C:驱动器上的所有目录和文件.
I wrote the simplest example of a file browser I could think of. It lists all of the directories and files on the C: drive on a Windows computer.
这是结果.
这是代码.我将所有内容放在一起在一堂课中,以使其更容易粘贴到此处.您应该将这些类分开.
And here's the code. I put everything together in one class to make it easier to paste here. You should separate the classes.
package com.ggl.testing;
import java.io.File;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
public class FileBrowser implements Runnable {
private DefaultMutableTreeNode root;
private DefaultTreeModel treeModel;
private JTree tree;
@Override
public void run() {
JFrame frame = new JFrame("File Browser");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
File fileRoot = new File("C:/");
root = new DefaultMutableTreeNode(new FileNode(fileRoot));
treeModel = new DefaultTreeModel(root);
tree = new JTree(treeModel);
tree.setShowsRootHandles(true);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane);
frame.setLocationByPlatform(true);
frame.setSize(640, 480);
frame.setVisible(true);
CreateChildNodes ccn =
new CreateChildNodes(fileRoot, root);
new Thread(ccn).start();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new FileBrowser());
}
public class CreateChildNodes implements Runnable {
private DefaultMutableTreeNode root;
private File fileRoot;
public CreateChildNodes(File fileRoot,
DefaultMutableTreeNode root) {
this.fileRoot = fileRoot;
this.root = root;
}
@Override
public void run() {
createChildren(fileRoot, root);
}
private void createChildren(File fileRoot,
DefaultMutableTreeNode node) {
File[] files = fileRoot.listFiles();
if (files == null) return;
for (File file : files) {
DefaultMutableTreeNode childNode =
new DefaultMutableTreeNode(new FileNode(file));
node.add(childNode);
if (file.isDirectory()) {
createChildren(file, childNode);
}
}
}
}
public class FileNode {
private File file;
public FileNode(File file) {
this.file = file;
}
@Override
public String toString() {
String name = file.getName();
if (name.equals("")) {
return file.getAbsolutePath();
} else {
return name;
}
}
}
}
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