java实现Windows资源管理器
===================================================================
// FileTree.java
/***********************************************************
?*??? Author: Jason
?*???? email: tl21cen@hotmail.com
?* CSDN blog: http://blog.csdn.net/UnAgain/
?***********************************************************/
package tl.exercise.swing;
?
import java.awt.Component;
import java.io.File;
import java.util.Vector;
?
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
?
public class FileTree extends JTree {
??? static final long serialVersionUID = 0;
?
??? private FileList theList;
?
??? public FileTree(FileList list) {
??? ??? theList = list;
??? ??? setModel(new FileSystemModel(new FolderNode()));
??? ??? this.setCellRenderer(new FolderRenderer());
??????
??? ??? addTreeSelectionListener(new TreeSelectionListener() {
?????? ??? public void valueChanged(TreeSelectionEvent tse) {
?????????? }
?????? });
??????
??? ??? this.setSelectionRow(0);
??? }
?
??? public void fireValueChanged(TreeSelectionEvent tse) {
??? ??? TreePath tp = tse.getNewLeadSelectionPath();
??? ??? Object o = tp.getLastPathComponent();
?????? // theList.fireTreeSelectionChanged((PathNode)o);
??? ??? theList.fireTreeSelectionChanged((FolderNode) o);
??? }
?
??? public void fireTreeCollapsed(TreePath path) {
??? ??? super.fireTreeCollapsed(path);
??? ??? TreePath curpath = getSelectionPath();
?
?????? if (path.isDescendant(curpath)) {
?????? ??? setSelectionPath(path);
?????? }
??? }
?
??? public void fireTreeWillExpand(TreePath path) {
??? ??? System.out.println("Path will expand is " + path);
??? }
?
??? public void fireTreeWillCollapse(TreePath path) {
??? ??? System.out.println("Path will collapse is " + path);
??? }
?
??? class ExpansionListener implements TreeExpansionListener {
??? ??? FileTree tree;
?
??? ??? public ExpansionListener(FileTree ft) {
?????? ??? tree = ft;
?????? }
?
??? ??? public void treeCollapsed(TreeExpansionEvent tee) {
?????? }
?
??? ??? public void treeExpanded(TreeExpansionEvent tee) {
?????? }
??? }
}
?
class FileSystemModel implements TreeModel {
??? I_fileSystem theRoot;
?
??? char fileType = I_fileSystem.DIRECTORY;
?
??? public FileSystemModel(I_fileSystem fs) {
??? ??? theRoot = fs;
??? }
?
??? public Object getRoot() {
??? ??? return theRoot;
??? }
?
??? public Object getChild(Object parent, int index) {
??? ??? return ((I_fileSystem) parent).getChild(fileType, index);
?
??? }
?
??? public int getChildCount(Object parent) {
??? ??? return ((I_fileSystem) parent).getChildCount(fileType);
??? }
?
??? public boolean isLeaf(Object node) {
??? ??? return ((I_fileSystem) node).isLeaf(fileType);
??? }
?
??? public int getIndexOfChild(Object parent, Object child) {
??? ??? return ((I_fileSystem) parent).getIndexOfChild(fileType, child);
??? }
?
??? public void valueForPathChanged(TreePath path, Object newValue) {
??? }
?
??? public void addTreeModelListener(TreeModelListener l) {
??? }
?
??? public void removeTreeModelListener(TreeModelListener l) {
??? }
}
?
interface I_fileSystem {
??? final public static char DIRECTORY = 'D';
?
??? final public static char FILE = 'F';
?
??? final public static char ALL = 'A';
?
??? public Icon getIcon();
?
??? public I_fileSystem getChild(char fileType, int index);
?
??? public int getChildCount(char fileType);
?
??? public boolean isLeaf(char fileType);
?
??? public int getIndexOfChild(char fileType, Object child);
}
?
/**
?* A data model for a JTree. This model explorer windows file system directly.
?*
?* <p>
?* Perhaps there is a fatal bug with this design. For speed, each of instances
?* of this model contains file objects of subdirectory, up to now, there isn't
?* any method to release them until program be end. I'm afraid that the memory
?* would be full of if the file system is large enough and JVM memery size
?* setted too small.
?*
?* <p>
?* I won't pay more attention to solve it. it isn't goal of current a exercise.
?*
?* @author Jason
?*/
class FolderNode implements I_fileSystem {
?
??? // private static FolderNode theRoot;
??? private static FileSystemView fsView;
?
??? private static boolean showHiden = true;;
?
??? private File theFile;
?
??? private Vector<File> all = new Vector<File>();
?
??? private Vector<File> folder = new Vector<File>();
?
??? /**
??? ?* set that whether apply hiden file.
??? ?*
??? ?* @param ifshow
??? ?*/
??? public void setShowHiden(boolean ifshow) {
??? ??? showHiden = ifshow;
??? }
?
??? public Icon getIcon() {
??? ??? return fsView.getSystemIcon(theFile);
??? }
?
??? public String toString() {
?????? // return fsView.
??? ??? return fsView.getSystemDisplayName(theFile);
??? }
?
??? /**
??? ?* create a root node. by default, it should be the DeskTop in window file
??? ?* system.
??? ?*
??? ?*/
??? public FolderNode() {
??? ??? fsView = FileSystemView.getFileSystemView();
??? ??? theFile = fsView.getHomeDirectory();
??? ??? prepareChildren();
??? }
?
??? private void prepareChildren() {
????? File[] files = fsView.getFiles(theFile, showHiden);
?
?????? for (int i = 0; i < files.length; i++) {
?????? ??? all.add(files[i]);
?????? ??? if (files[i].isDirectory()
?????????? ??? ??? && !files[i].toString().toLowerCase().endsWith(".lnk")) {
?
?????????? ??? folder.add(files[i]);
?????????? }
?????? }
??? }
?
??? private FolderNode(File file) {
??? ??? theFile = file;
??? ??? prepareChildren();
??? }
?
??? public FolderNode getChild(char fileType, int index) {
?????? if (I_fileSystem.DIRECTORY == fileType) {
?????? ??? return new FolderNode(folder.get(index));
?????? } else if (I_fileSystem.ALL == fileType) {
?????? ??? return new FolderNode(all.get(index));
?????? } else if (I_fileSystem.FILE == fileType) {
?????? ??? return null;
?????? } else {
?????? ??? return null;
?????? }
?
??? }
?
??? public int getChildCount(char fileType) {
?????? if (I_fileSystem.DIRECTORY == fileType) {
?????? ??? return folder.size();
?????? } else if (I_fileSystem.ALL == fileType) {
?????? ??? return all.size();
?????? } else if (I_fileSystem.FILE == fileType) {
?????? ??? return -1;
?????? } else {
?????? ??? return -1;
?????? }
??? }
?
??? public boolean isLeaf(char fileType) {
?????? if (I_fileSystem.DIRECTORY == fileType) {
?????? ??? return folder.size() == 0;
?????? } else if (I_fileSystem.ALL == fileType) {
?????? ??? return all.size() == 0;
?????? } else if (I_fileSystem.FILE == fileType) {
?????? ??? return true;
?????? } else {
?????? ??? return true;
?????? }
??? }
?
??? public int getIndexOfChild(char fileType, Object child) {
?????? if (child instanceof FolderNode) {
?????? ??? if (I_fileSystem.DIRECTORY == fileType) {
?????????? ??? return folder.indexOf(((FolderNode) child).theFile);
?????????? } else if (I_fileSystem.ALL == fileType) {
?????????? ??? return all.indexOf(((FolderNode) child).theFile);
?????????? } else if (I_fileSystem.FILE == fileType) {
?????????? ??? return -1;
?????????? } else {
?????????? ??? return -1;
?????????? }
?????? } else {
?????? ??? return -1;
?????? }
??? }
}
?
class FolderRenderer extends DefaultTreeCellRenderer {
??? private static final long serialVersionUID = 1L;
??? public Component getTreeCellRendererComponent(JTree tree, Object value,
?????? ??? boolean sel, boolean expanded, boolean leaf, int row,
?????? ??? boolean hasFocus) {
?
??? ??? I_fileSystem node = (I_fileSystem) value;
?????? Icon icon = node.getIcon();
?
??? ??? setLeafIcon(icon);
??? ??? setOpenIcon(icon);
??? ??? setClosedIcon(icon);
?
??? ??? return super.getTreeCellRendererComponent(tree, value, sel, expanded,
?????????? ?? leaf, row, hasFocus);
??? }
}
=========================================================
// JExplorer.java
package tl.exercise.swing;
?
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
?
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.border.BevelBorder;
?
public class JExplorer {
??? public static void main(String[] args) {
??? ??? //JFrame.setDefaultLookAndFeelDecorated(true);
??? ??? JFrame frame = new JFrame();
??? ??? frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
?
??? ??? frame.getContentPane().add(new UI(frame));
?
??? ??? frame.pack();
?
??? ??? Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
?????? int left = (screen.width - frame.getWidth()) / 2;
?????? int top = (screen.height - frame.getHeight()) / 2;
?
??? ??? frame.setLocation(left, top);
?
??? ??? frame.setVisible(true);
??? }
}
?
class UI extends JPanel {
??? //implements I_menuHandler{
??? static final long serialVersionUID = 0l;
?
??? static int LEFT_WIDTH = 200;
?
??? static int RIGHT_WIDTH = 300;
?
??? static int WINDOW_HEIGHT = 300;
?
??? JFrame frame = null;
?
??? public UI(JFrame frame) {
??? ??? //EmptyBorder eb = new EmptyBorder(1,1,1,1);
?
??? ??? this.frame = frame;
??? ??? setPreferredSize(new Dimension(800, 600));
?
??? ??? setBorder(new BevelBorder(BevelBorder.LOWERED));
?
??? ??? setLayout(new BorderLayout());
?
??? ??? FileList list = new FileList();
??? ??? FileTree tree = new FileTree(list);
??? ??? tree.setDoubleBuffered(true);
??? ??? list.setDoubleBuffered(true);
?
??? ??? JScrollPane treeView = new JScrollPane(tree);
??? ??? treeView.setPreferredSize(
new Dimension(LEFT_WIDTH, WINDOW_HEIGHT));
??? ??? JScrollPane listView = new JScrollPane(list);
??? ??? listView.setPreferredSize(
new Dimension(RIGHT_WIDTH, WINDOW_HEIGHT));
?
??? ??? JSplitPane pane =
new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, treeView,
?????????? ??? listView);
??? ??? pane.setDividerLocation(300);
??? ??? pane.setDividerSize(4);
??? ??? //pane.setDoubleBuffered(true);
?
??? ??? add(pane);
??? }
}
==========================================================
// FileList.java
package tl.exercise.swing;?
import java.awt.Color;
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;
import javax.swing.event.ListDataListener;
?
public class FileList
extends JList{
??? //PathNode theNode;
??? FileListModel dataModel;
??? static final long serialVersionUID = 10;
???? public FileList() {
??? ??? dataModel = new FileListModel();
??? ??? setModel(dataModel);
??? ??? this.setCellRenderer(new MyCellRenderer());
??? }
????public void fireTreeSelectionChanged(I_fileSystem node) {
??? ??? //Vector files = node.getFiles();
??? ??? //theNode = node;
??? ??? dataModel.setNode(node);
??? ??? updateUI();
??? }
}
?
class FileListModel
implements ListModel {
??? FileList theList;
??? I_fileSystem node;
??? char fileType = I_fileSystem.ALL;
?
??? public void setNode (I_fileSystem node) {
??? ??? this.node = node;
??? }
?
??? public Object getElementAt(int index) {
?????? if (node != null) {
?????? ??? return ((I_fileSystem)node).getChild(fileType, index);
?????? } else {
?????? ??? return null;
?????? }
??? }
?
??? public int getSize() {
?????? if (node != null) {
?????? ??? return ((I_fileSystem)node).getChildCount(fileType);
?????? } else {
?????? ??? return 0;
?????? }?? ???
??? }
???
??? public void addListDataListener(ListDataListener l) {
??? }
??? public void removeListDataListener(ListDataListener l) {
??? }
}
?
class MyCellRenderer extends JLabel implements ListCellRenderer {
??? public MyCellRenderer() {
??????? setOpaque(true);
??? }
??? public Component getListCellRendererComponent(
??????? JList list,
??????? Object value,
??????? int index,
??????? boolean isSelected,
??????? boolean cellHasFocus)
??? {
??? ??? FolderNode node = (FolderNode)value;
??? ??? setIcon(node.getIcon());
??????? setText(value.toString());
??????? setBackground(isSelected ? Color.BLUE.darker().darker(): Color.WHITE);
????? ??setForeground(isSelected ? Color.WHITE : Color.BLACK);
??????? return this;
??? }
}
轉載于:https://www.cnblogs.com/kentyshang/archive/2007/08/10/851041.html
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