用自定义的文件树来定义结点后，Jtree默认的对结点的增删函数将不再起作用，也不能将对结点的操作作用于对应的文件；
对文件同时进行操作的思想是，先将结点与文件的联系断开，对结点进行初始化，即可利用系统自带的增删改函数，对结点操作后，在与相应的文件联系起来
public void setPopupMenu(FileTree tree) { final JPopupMenu pop = new JPopupMenu(); //final FileSystemView fileSystemView = FileSystemView.getFileSystemView(); pop.add(new AbstractAction("添加子目录") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) { TreePath treepath = tree.getSelectionPath(); DefaultMutableTreeNode selectionNode = (DefaultMutableTreeNode) treepath.getLastPathComponent(); FileNode fileNode=(FileNode)selectionNode.getUserObject(); TreeNode parentNode = selectionNode.getParent(); try{ String s = fileNode.file.getAbsolutePath(); String fileName = new String(s.getBytes("GB2312"),"GBK"); CreateFileUtil newDir = new CreateFileUtil(fileName); newDir.createDir(); //定义新结点 DefaultMutableTreeNode newNode=new DefaultMutableTreeNode(); newNode.setAllowsChildren(true); File tempFile = new File(newDir.destFileName); System.out.println(newDir.destFileName); // System.out.println(newDir.dir.getName()); FileNode tempNode = new FileNode(newDir.dir.getName(),null,tempFile,false); newNode=new DefaultMutableTreeNode(tempNode); ((DefaultTreeModel) tree.getModel()).insertNodeInto(newNode,selectionNode,selectionNode.getChildCount()); } catch(UnsupportedEncodingException eve){ } } }); pop.add(new AbstractAction("添加文件") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) { TreePath treepath = tree.getSelectionPath(); DefaultMutableTreeNode selectionNode = (DefaultMutableTreeNode) treepath.getLastPathComponent(); FileNode fileNode=(FileNode)selectionNode.getUserObject(); DefaultMutableTreeNode parentNode =(DefaultMutableTreeNode) selectionNode.getParent(); FileNode parentfileNode=(FileNode)parentNode.getUserObject(); if(fileNode.file.isDirectory()){ RenameDialog re = new RenameDialog(null,true); re.setLocationRelativeTo(null); re.setVisible(true); String inputname = re.getname(); try{ String realName = fileNode.file.getAbsolutePath()+"\\"+inputname; String fileName = new String(realName.getBytes("GB2312"),"GBK"); CreateFileUtil newFile = new CreateFileUtil(fileName); newFile.createFile(); //定义新结点 DefaultMutableTreeNode newNode=new DefaultMutableTreeNode(); newNode.setAllowsChildren(true); FileSystemView fileSystemView = FileSystemView.getFileSystemView(); File tempFile = new File(newFile.destFileName+".txt"); FileNode tempNode = new FileNode(newFile.file.getName().replace(".txt",""),null,tempFile,false); newNode=new DefaultMutableTreeNode(tempNode); ((DefaultTreeModel) tree.getModel()).insertNodeInto(newNode,selectionNode,selectionNode.getChildCount()); } catch(UnsupportedEncodingException eve){ } tree.updateUI(); } } }); pop.add(new AbstractAction("删除目录") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) { TreePath treepath = tree.getSelectionPath(); DefaultMutableTreeNode selectionNode = (DefaultMutableTreeNode) treepath.getLastPathComponent(); FileNode fileNode=(FileNode)selectionNode.getUserObject(); TreeNode parentNode = selectionNode.getParent(); try{ if(!(fileNode.file.getAbsolutePath()).equals("C:\\Users\\Dadaism\\Desktop\\123\\用户文件夹")){ String s = fileNode.file.getAbsolutePath(); String fileName = new String(s.getBytes("GB2312"),"GBK"); if(fileNode.file.isFile()){ new DeleteUtil().deleteFile(fileName); } if(fileNode.file.isDirectory()){ new DeleteUtil().deleteDirectory(fileName); } FileNode tempNode = new FileNode(null,null,null,false); ((DefaultTreeModel) tree.getModel()).removeNodeFromParent(selectionNode); } else{ System.out.println("不能删除根目录！"); } }catch(UnsupportedEncodingException eve){ } } }); tree.addMouseListener(new MouseAdapter() { @Override public void mouseReleased(MouseEvent e) { if (e.isMetaDown()) { pop.show(tree, e.getX(), e.getY()); } } }); }
相关的类
import java.io.File; import java.io.IOException; public class CreateFileUtil { private int i = 1; public String destFileName; File dir; File file; CreateFileUtil(String fileName){ destFileName = fileName; } public void createFile() { String name = destFileName; String addtxt = name+".txt"; file = new File(addtxt); while(file.exists()){ destFileName = name+"("+(i++)+")"; addtxt = destFileName + ".txt"; file = new File(addtxt); } try { file =new File(destFileName+".txt"); file.createNewFile(); } catch (IOException e) { } } public void createDir() { String name = destFileName+"\\新建文件夹"; destFileName =name; dir= new File(name); while(dir.exists()){ destFileName = name+"("+(i++)+")"; dir =new File(destFileName); } //创建目录 dir.mkdirs(); } } 需要注意的是，java默认编码方式为UTF-8，获得路径时可能会导乱码现象，可以用getBytes（）函数进行转化
