package org.a.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.FileNotFoundExce

package org.a.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();
}
}
}