JAVA 资源管理器

import java.awt.Dimension;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.BoxLayout;
import javax.swing.tree.TreePath;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/*
JTree的构造函数:
JTree()
JTree(Hashtable value)
JTree(Object[] value)//只有这个构造函数可以创建多个根结点
JTree(TreeModel newModel)
JTree(TreeNode root)
JTree(TreeNode root, boolean asksAllowsChildren)
JTree(Vector value)

*/
public class JTreeDemo
{
 public static void main (String[] args)
 {

  //构造函数：JTree()
  JTree example1 = new JTree();

 

  
  //构造函数：JTree(Object[] value)
  Object[] letters= {"a", "b", "c", "d", "e"};
  JTree example2 = new JTree (letters);

 

  //构造函数：JTree(TreeNode root)(TreeNode空)
  //用空结点创建树
  DefaultMutableTreeNode node1 = new DefaultMutableTreeNode();//定义树结点
  JTree example3 = new JTree (node1);//用此树结点做参数调用 JTree的构造函数创建含有一个根结点的树

 

  //构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
  //用一个根结点创建树
  DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Color");
  JTree example4 = new JTree (node2);//结点不可以颜色,默认为白面黑字
  example4.setBackground (Color.lightGray);

 

  //构造函数：JTree(TreeNode root, boolean asksAllowsChildren)(同上,只是TreeNode又有不同)
  //使用DefaultMutableTreeNode类先用一个根结点创建树，设置为可添加孩子结点,再添加孩子结点
  DefaultMutableTreeNode color = new DefaultMutableTreeNode("Color", true);
  DefaultMutableTreeNode gray = new DefaultMutableTreeNode ("Gray");
  color.add (gray);
  color.add (new DefaultMutableTreeNode ("Red"));
  gray.add (new DefaultMutableTreeNode ("Lightgray"));
  gray.add (new DefaultMutableTreeNode ("Darkgray"));
  color.add (new DefaultMutableTreeNode ("Green"));
  JTree example5 = new JTree (color);
  
  
  
  
  //构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
  //通过逐个添加结点创建树
  DefaultMutableTreeNode biology = new DefaultMutableTreeNode ("Biology");
  DefaultMutableTreeNode animal = new DefaultMutableTreeNode ("Animal");
  DefaultMutableTreeNode mammal = new DefaultMutableTreeNode ("Mammal");
  DefaultMutableTreeNode horse = new DefaultMutableTreeNode ("Horse");
  mammal.add (horse);
  animal.add (mammal);
  biology.add (animal);
  JTree example6 = new JTree (biology);
  horse.isLeaf();
  horse.isRoot();
  
  

  //构造函数:JTree(TreeModel newModel)
  //用DefaultMutableTreeNodel类定义一个结点再用这个结点做参数定义一个用DefaultTreeMode
  //创建一个树的模型,再用JTree的构造函数创建一个树
  
  DefaultMutableTreeNode root = new DefaultMutableTreeNode ("Root1");
  DefaultMutableTreeNode child1 = new DefaultMutableTreeNode ("Child1");
  DefaultMutableTreeNode child11 = new DefaultMutableTreeNode ("Child11");
  DefaultMutableTreeNode child111 = new DefaultMutableTreeNode ("Child111");
  root.add (child1); child1.add (child11); child11.add (child111);
  
  
  
  DefaultTreeModel model = new DefaultTreeModel (root);
  
  JTree example7 = new JTree (model);

 

  JPanel panel = new JPanel();
  panel.setLayout (new BoxLayout (panel, BoxLayout.X_AXIS));
  panel.setPreferredSize (new Dimension (700, 400));
  panel.add (new JScrollPane (example1));//JTree必须放在JScrollPane上
  panel.add (new JScrollPane (example2));
  panel.add (new JScrollPane (example3));
  panel.add (new JScrollPane (example4));
  panel.add (new JScrollPane (example5));
  panel.add (new JScrollPane (example6));
  panel.add (new JScrollPane (example7));
  

 

  JFrame frame = new JFrame ("JTreeDemo");
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  frame.setContentPane (panel);
  frame.pack();
  frame.show();
 }
}
==========================这一种好简单,很好用======================================
import   org.eclipse.swt.widgets.*;  
   
  public   class   Snippet33   {  
   
  public   static   void   main   (String   []   args)   {  
  Display   display   =   new   Display   ();  
  Shell   shell   =   new   Shell   (display);  
  shell.open   ();  
  DirectoryDialog   dialog   =   new   DirectoryDialog   (shell);  
  dialog.setFilterPath   ("c:\\");   //Windows   specific  
  System.out.println   ("RESULT="   +   dialog.open   ());  
  while   (!shell.isDisposed())   {  
  if   (!display.readAndDispatch   ())   display.sleep   ();  
  }  
  display.dispose   ();  
  }  
   
  }
==================================================================================
楼上的用的是swt包，看见这个没org.eclipse.swt.widgets  
  下面是列表，你自己再改改吧，用的是jdk的jtree写的遍列所有盘文件夹  
   
  import   java.awt.BorderLayout;  
  import   java.awt.Color;  
  import   java.awt.Dimension;  
  import   java.awt.FlowLayout;  
  import   java.awt.event.ActionEvent;  
  import   java.awt.event.ActionListener;  
  import   java.awt.event.MouseAdapter;  
  import   java.awt.event.MouseEvent;  
  import   java.io.File;  
  import   java.io.IOException;  
   
  import   javax.swing.BorderFactory;  
  import   javax.swing.JButton;  
  import   javax.swing.JDialog;  
  import   javax.swing.JLabel;  
  import   javax.swing.JPanel;  
  import   javax.swing.JScrollPane;  
  import   javax.swing.JTree;  
  import   javax.swing.event.TreeExpansionEvent;  
  import   javax.swing.event.TreeExpansionListener;  
  import   javax.swing.filechooser.FileSystemView;  
  import   javax.swing.tree.DefaultMutableTreeNode;  
  import   javax.swing.tree.DefaultTreeModel;  
  import   javax.swing.tree.TreePath;  
  import   javax.swing.tree.TreeSelectionModel;  
   
  public   class   FileTree   extends   JDialog   {  
  private   JLabel   path_   =   new   JLabel("   ");  
  private   JTree   tree_;  
  private   static   String   filepath;  
   
          public   FileTree()   {  
  init();  
          }  
          private   void   init()   {  
  JPanel   labelPanel   =   new   JPanel(new   FlowLayout(FlowLayout.LEFT));  
  labelPanel.setSize(300,   40);  
  JPanel   buttonPanel   =   new   JPanel(new   FlowLayout(FlowLayout.RIGHT));  
  JLabel   current   =   new   JLabel("Current   Selection");  
  labelPanel.setLayout(new   BorderLayout());  
  labelPanel.add(current,   BorderLayout.NORTH);  
  labelPanel.add(path_,   BorderLayout.SOUTH);  
   
  File[]   roots   =   (new   PFileSystemView()).getRoots();  
  FileNode   nod   =   new   FileNode   (roots[0]);  
  nod.explore();  
  tree_   =   new   JTree(new   DefaultTreeModel(nod));  
  tree_.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);    
   
  JScrollPane   sp   =   new   JScrollPane(tree_);  
  sp.setBorder(BorderFactory.createEtchedBorder(Color.white,   new   Color(148,   145,   140)));  
   
  labelPanel.setBorder(BorderFactory.createEmptyBorder(0,   19,   0,   0));  
  JButton   buttonOK   =   new   JButton("OK");  
  buttonOK.setPreferredSize(new   Dimension(70,   25));  
  JButton   buttonCanel   =   new   JButton("Canel");  
  buttonCanel.setPreferredSize(new   Dimension(70,   25));  
  buttonPanel.add(buttonOK);  
  buttonPanel.add(buttonCanel);  
           
  //canel   action  
  buttonCanel.addActionListener(new   ActionListener()   {  
  public   void   actionPerformed(ActionEvent   e)   {  
  System.exit(0);  
  }  
  });  
  //ok   action  
  buttonOK.addActionListener(new   ActionListener()   {  
  public   void   actionPerformed(ActionEvent   e)   {  
  System.err.println(filepath);      
  }  
  });  
  tree_.setShowsRootHandles(true);  
  tree_.addTreeExpansionListener(new   TreeExpansionListener()   {  
  public   void   treeCollapsed(TreeExpansionEvent   e)   {  
   
  }  
  public   void   treeExpanded   (TreeExpansionEvent   e)   {  
  TreePath   path   =   e.getPath();  
  FileNode   node   =   (FileNode)path.getLastPathComponent();  
  if   (!node.isExplored())   {  
  DefaultTreeModel   model   =   (  
  (DefaultTreeModel)   tree_.getModel());  
  node.explore();  
  model.nodeStructureChanged(node);  
  }  
  }                                
  });  
  tree_.addMouseListener(new   MouseAdapter()   {  
  public   void   mousePressed(MouseEvent   e)   {  
  JTree   tree   =   (JTree)e.getSource();  
  int   row   =   tree.getRowForLocation(e.getX(),   e.getY());  
  if   (row   ==   -1)   {  
  return;  
  }  
  TreePath   path   =   tree.getPathForRow(row);  
  if   (path   ==   null)   {  
  return;  
  }  
  FileNode   node   =   (FileNode)path.getLastPathComponent();  
  if   (node   ==   null)   {  
  return;  
  }  
  filepath   =   node.getString();  
  path_.setText(filepath);  
  }  
  });  
  getContentPane().add(sp,   BorderLayout.CENTER);  
  getContentPane().add(labelPanel,   BorderLayout.NORTH);  
  getContentPane().add(buttonPanel,   BorderLayout.SOUTH);  
  setSize(350,   400);  
  this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);  
  this.setTitle("File   Tree");  
          }  
  class   FileNode   extends   DefaultMutableTreeNode   {  
  private   boolean   explored_   =   false;  
   
  public   FileNode(File   file)   {  
  setUserObject   (file);  
  }  
  public   boolean   getAllowChildren()   {  
  return   isDirectory();  
  }  
  public   boolean   isLeaf()   {  
  return   !isDirectory();  
  }  
   
  public   File   getFile()   {  
  return   (File)getUserObject();  
  }  
  public   boolean   isExplored()   {  
  return   explored_;  
  }  
  public   boolean   isDirectory()   {  
  File   file   =   getFile();  
  return   file.isDirectory();  
  }  
  public   String   toString()   {  
  File   file   =   getFile   ();  
  String   filename   =   file.toString();  
  int   index   =   filename.lastIndexOf("\\");  
  return   (index   !=   -1   &&   index   !=   filename.length()   -   1)   ?  
  filename.substring(index   +   1)   :  
  filename;  
  }  
  public   String   getString()   {  
  File   file   =   getFile   ();  
  String   filename   =   file.getAbsolutePath();  
  return   filename;  
  }  
  public   void   explore()   {  
  if   (!isDirectory())   {  
  return;  
  }  
  if   (!isExplored())   {  
  File   file   =   getFile   ();  
  File   []   children   =   file.listFiles();  
  for   (int   i   =   0;   i   <   children.length;   ++i)   {  
  if   (children[i].isDirectory())   {  
  add(new   FileNode   (children[i]));  
  }  
  }    
  explored_   =   true;  
  }  
  }    
  }  
   
  class   PFileSystemView   extends   FileSystemView   {  
  public   File   createNewFolder(File   containingDir)   throws   IOException   {  
  return   null;  
  }  
  }  
  public   static   void   main(String[]   args)   {  
          (new   FileTree()).show(true);  
  }  
  }  

来源：https://www.cnblogs.com/kentyshang/archive/2007/08/14/855565.html