生成指定文件目录下的文件树

来源：互联网发布：学mysql还是sql server 编辑：程序博客网时间：2024/05/16 17:32

用FileSystemView fileSystemView = FileSystemView.getFileSystemView()初始化的树默认以desktop为根目录，但是如果不使用FileSystemView来初始化，自定义的FileNode将不能用实际文件来定义，即不能与文件联系起来，可以采用listFile（），和FileSystemView相结合的方法，同时在FiletTreeModel中自定义FileNode的isLeaf（）函数来实现

class FileTreeModel extends DefaultTreeModel {
public FileTreeModel(TreeNode root) {
super(root);
FileSystemView fileSystemView = FileSystemView.getFileSystemView();
File[] files=fileSystemView.getRoots();
for (int i = 0; i < files.length; i++) {
FileNode childFileNode = new FileNode(fileSystemView.getSystemDisplayName(files[i]), fileSystemView.getSystemIcon(files[i]), files[i], false);
DefaultMutableTreeNode childTreeNode = new DefaultMutableTreeNode(childFileNode);
((DefaultMutableTreeNode)root).add(childTreeNode);
}
}
@Override
public boolean isLeaf(Object node) {
DefaultMutableTreeNode treeNode=(DefaultMutableTreeNode)node;
FileNode fileNode=(FileNode)treeNode.getUserObject();
if(fileNode.isDummyRoot)return false;
return fileNode.file.isFile();
}
}

初始化

  DefaultMutableTreeNode lastTreeNode =(DefaultMutableTreeNode) event.getPath().getLastPathComponent();
FileNode fileNode = (FileNode) lastTreeNode.getUserObject();

File[] files;
File f = new File("C:/Users/Dadaism/Desktop/123/");

if (!fileNode.isInit) {
if (fileNode.isDummyRoot) {
files = f.listFiles();
}
else {
FileSystemView fs = FileSystemView.getFileSystemView();
files = fs.getFiles(
((FileNode) lastTreeNode.getUserObject()).file,
false);
}
for (int i = 0; i < files.length; i++) {
FileNode childFileNode;
DefaultMutableTreeNode childTreeNode;

if(files[i].getName().endsWith(".txt")){
String filename = files[i].getName().replace(".txt", "");
childFileNode = new FileNode(filename,null,files[i], false);
}
else{
childFileNode = new FileNode(files[i].getName(),null,files[i],false);
}
childTreeNode = new DefaultMutableTreeNode(childFileNode);
lastTreeNode.add(childTreeNode);
}
DefaultTreeModel treeModel1 = (DefaultTreeModel) getModel();
treeModel1.nodeStructureChanged(lastTreeNode);
}
fileNode.isInit = true;

阅读全文

0 0