【JAVA】JTree遍历指定目录生成树

package com.遍历文件夹;

import java.io.File;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;

public class AllFile extends JFrame {
private static final long serialVersionUID = -1877527354792619586L;

static JTree tree;
static DefaultTreeModel newModel;
static DefaultMutableTreeNode Node;
static DefaultMutableTreeNode temp;
static String path="C:/Users/Administrator/Desktop/飞鸽传书/Teamviewer";//需要遍历的目录
public AllFile() {
Node=traverseFolder(path);
newModel=new DefaultTreeModel(Node);
tree=new JTree(newModel);

this.setSize(400, 300);
this.add(new JScrollPane(tree));
this.setResizable(false);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setVisible(true);
}
public static void main(String[] args) {
new AllFile();
}

public static DefaultMutableTreeNode traverseFolder(String path) {
DefaultMutableTreeNode fujiedian = new DefaultMutableTreeNode(new File(path).getName());
File file = new File(path);

if (file.exists()) {
File[] files = file.listFiles();
if (files.length == 0) {
if(file.isDirectory()) {//如果是空文件夹
DefaultMutableTreeNode dn=new DefaultMutableTreeNode(file.getName(), false);
return dn;
}
}else{
for (File file2 : files) {
if (file2.isDirectory()) {
//是目录的话，生成节点，并添加里面的节点
fujiedian.add(traverseFolder(file2.getAbsolutePath()));
}else{
//是文件的话直接生成节点，并把该节点加到对应父节点上
temp=new DefaultMutableTreeNode(file2.getName());
fujiedian.add(temp);
}
}
}
} else {//文件不存在
return null;
}
return fujiedian;
}
}