资源管理器2

 

package org.accp.explor;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.sql.Date;

import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;

public class Test1 extends DefaultMutableTreeNode {

 
 private static final long serialVersionUID = 6999685634761062308L;

 private class MyFile {//这个内部类的用处在于在JTree节点的select发生时,对所选文件进行格式转化
  private File file;

  public MyFile(File file) {
   this.file = file;
  }

  public String toString() {
   String name = file.getName().trim();
   if (name.length() == 0)
    name = file.getAbsolutePath().trim();
   return name;
  }

 }

 

 DefaultMutableTreeNode treeRoot;

 DefaultTableModel tableModel;

 JTable table;

 DefaultMutableTreeNode parent;

 Object[][] list = { {} };

 

 public void treeMake() throws UnknownHostException { // 添加机器码&&构造界面
  InetAddress local = InetAddress.getLocalHost();
  treeRoot = new DefaultMutableTreeNode(local.getHostName());
  final JTree tree = new JTree(treeRoot);
  JScrollPane scrolltree = new JScrollPane(tree);
  scrolltree.setPreferredSize(new Dimension(200, 300));

  String[] row = { "文件", "类型", "最后修改日期" };

  tableModel = new DefaultTableModel(list, row);
  table = new JTable(tableModel);
  JScrollPane scrollTable = new JScrollPane(table);
  scrollTable.setPreferredSize(new Dimension(500, 500));
 
  MenuBar meb=new MenuBar();
 Menu menuFile=new Menu("文件(F)");
 Menu menuEdit=new Menu("编辑(E)");
 Menu menuLook=new Menu("查看(V)");
 
 meb.add(menuFile);
 MenuItem miFile=new MenuItem("打开");
 menuFile.add(miFile);
 meb.add(menuEdit);
 MenuItem miEdit=new MenuItem("复制");
 menuEdit.add(miEdit);
 meb.add(menuLook);
 MenuItem miLook=new MenuItem("工具栏");
 menuLook.add(miLook);
 
  JFrame jf = new JFrame();
  jf.add(BorderLayout.WEST, scrolltree);
  jf.add(BorderLayout.CENTER, scrollTable);
  jf.setSize(600, 600);
  jf.setVisible(true);
  jf.setMenuBar(meb);
  jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  // 添加电脑本地硬盘
  for (char i = 'c'; i < 'z'; i++) {
   String path = i + ":/";
   if (((new File(path)).exists())) {
    DefaultMutableTreeNode diskNode = new DefaultMutableTreeNode(
      new MyFile(new File(path)));
    treeRoot.add(diskNode);
    readfiles(new File(path), diskNode);
   }
  }

  tree.addTreeSelectionListener(new TreeSelectionListener() {//添加listener
   public void valueChanged(TreeSelectionEvent arg0) {
    // TODO 自动生成方法存根

    TreePath path = tree.getSelectionPath();
    if (path == null)
     return;
    DefaultMutableTreeNode selectnode = (DefaultMutableTreeNode) path
      .getLastPathComponent();

    if (!selectnode.isLeaf()) {
     // 这里加上类型判断
     if (!(selectnode.getUserObject() instanceof MyFile)) {
      return;
     }
     File file_select = ((MyFile) selectnode.getUserObject()).file;
     // 读取文件夹下文件添加下层节点
     readfiles(file_select, selectnode);
     DefaultMutableTreeNode firstchild = (DefaultMutableTreeNode) selectnode
       .getFirstChild();
     selectnode.remove(firstchild);
     tableModel.setRowCount(0);
     File[] fileList = file_select.listFiles();
     list = fu(fileList);

     for (int i = 0; i < fileList.length; i++) {
      tableModel.addRow(list[i]);
     }

    }
    else {

     tableModel.setRowCount(0);
     try {
      File file_select = ((MyFile) selectnode.getUserObject()).file;
      String sizeFile=size(file_select);
      Object re[][]={{file_select.getName(),sizeFile,lastTime(file_select)}};
      list=re;
      tableModel.addRow(list[0]);
     } catch (IOException e) {
      // TODO 自动生成 catch 块
      e.printStackTrace();
     }
    }
   }
  });
 }

 

 public void readfiles(File file, DefaultMutableTreeNode node) {//读取所选节点,获取子节点

  File list[] = file.listFiles();
  if (list == null)
   return;
  for (int i = 0; i < list.length; i++) {
   File file_inlist = list[i];
   // String filename = file_inlist.getName();

   if (file_inlist.isDirectory()) {
    parent = new DefaultMutableTreeNode(new MyFile(file_inlist));
    // 添加空白文件夹节点 使子节点显示为文件夹
    File stubadd = null;
    DefaultMutableTreeNode stub = new DefaultMutableTreeNode(
      stubadd);
    parent.add(stub);
    node.add(parent);
   } else {
    DefaultMutableTreeNode son = new DefaultMutableTreeNode(
      new MyFile(file_inlist));
    node.add(son);

   }
  }

 }

 public String size(File file) throws IOException {//读取文件的大小
  FileInputStream fileLength = new FileInputStream(file);
  String sizefile = fileLength.available() + "字节";
  return sizefile;

 }

 public Date lastTime(File file) {
  long lastModified = file.lastModified();// 取得最后一次修改的时间
  Date date = new Date(lastModified);
  date.setTime(lastModified);
  return date;
 }

 

 public Object[][] fu(File[] file) {

  Object[][] m = new Object[file.length][3];
  for (int i = 0; i < file.length; i++) {
   m[i][0] = file[i].getName();
   try {
    // 这里有问题,如果是目录,怎么取大小?所以要用if
    // m[i][1] = size(file[i]);
    if (file[i].isDirectory()) {
     m[i][1] = "目录";
    } else {
     m[i][1] = size(file[i]);
    }
   } catch (IOException e) {
    // TODO 自动生成 catch 块
    e.printStackTrace();
   }
   m[i][2] = lastTime(file[i]);

  }
  return m;
 }
 public int getColumnCount() {
  // TODO 自动生成方法存根
  return 3;
 }

 public int getRowCount(File[] file) {
  // TODO 自动生成方法存根
  return file.length;
 }

 public Object getValueAt(int row, int col) {

  // TODO 自动生成方法存根
        return list[row][col];
 }

 public static void main(String[] args) {
  // TODO Auto-generated method

  Test1 disk = new Test1();
   try {
   disk.treeMake();
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
}