展开全部
importjavax.swing.*;
importjavax.swing.table.AbstractTableModel;
importjavax.swing.table.TableCellRenderer;
importjavax.swing.event.TreeModelListener;
importjavax.swing.event.TreeSelectionListener;
importjavax.swing.event.TreeSelectionEvent;
importjavax.swing.tree.TreeModel;
importjavax.swing.tree.TreePath;
importjavax.swing.tree.TreeCellRenderer;
importjava.awt.*;
importjava.awt.event.*;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.IOException;
importjava.io.FileFilter;
importjava.util.Calendar;
importjava.util.ArrayList;
importjava.text.SimpleDateFormat;
importjava.text.MessageFormat;
/**
*@authorHardneedl
*/
classJavaExplorerextendsJFrame{
privatestaticfinalDimensionminSize=newDimension(300,200);
privatestaticfinalDimensionmaxSize=newDimension(1024,768);
privatestaticfinalDimensionpreferredSize=newDimension(600,400);
privateJLabelstatusLabel;
privateJTreetree;
privateJTabledetailTable;
privateFileTableModeltableModel;
publicDimensiongetMaximumSize(){returnmaxSize;}
publicDimensiongetMinimumSize(){returnminSize;}
publicDimensiongetPreferredSize(){returnpreferredSize;}
publicStringgetTitle(){return"JavaExplorer";}
JavaExplorer()throwsHeadlessException{
init();
doLay();
attachListeners();
}
privatevoidinit(){
statusLabel=newJLabel(){publicColorgetForeground(){returnColor.BLUE;}};
tree=newJTree(newFileTreeModel());
tree.setCellRenderer(newDirCellRenderer());
detailTable=newJTable(tableModel=newFileTableModel());
detailTable.getColumnModel().getColumn(2).setCellRenderer(newTableCellRenderer(){
privateJLabellabel=newJLabel();
privatefinalSimpleDateFormatformat=newSimpleDateFormat("yyyy年mm月dd日HH时MM分ss秒");
publicComponentgetTableCellRendererComponent(JTabletable,Objectvalue,booleanisSelected,booleanhasFocus,introw,intcolumn){
if(valueinstanceofCalendar){
Calendarcal=(Calendar)value;
label.setText(format.format(cal.getTime()));
}
returnlabel;
}
});
detailTable.getColumnModel().getColumn(0).setCellRenderer(newTableCellRenderer(){
privateJLabellabel=newJLabel();
publicComponentgetTableCellRendererComponent(JTabletable,Objectvalue,booleanisSelected,booleanhasFocus,introw,intcolumn){
if(valueinstanceofFile){
Filef=(File)value;
label.setText(f.getName());
label.setForeground(f.isDirectory()?Color.RED:Color.BLACK);
}
returnlabel;
}
});
}
privatevoiddoLay(){
Containercontainer=getContentPane();
JSplitPanesplitPane=newJSplitPane(JSplitPane.HORIZONTAL_SPLIT,newJScrollPane(tree),newJScrollPane(detailTable));
container.add(splitPane,BorderLayout.CENTER);
container.add(statusLabel,BorderLayout.SOUTH);
pack();
}
privatevoidattachListeners(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tree.addTreeSelectionListener(newSelectionListener());
tree.addTreeSelectionListener(new_DirSelectionListener());
DirCellSelectedListenerck=newDirCellSelectedListener(tree);
detailTable.addKeyListener(ck);
detailTable.addMouseListener(ck);
}
publicstaticvoidmain(String[]args){
newJavaExplorer().setVisible(true);
}
privateclassFileTreeModelimplementsTreeModel{
staticfinalStringroot="我的电脑";
privateFile[]rootFiles;
privatefinalFileFilterdirFilter=newFileFilter(){
publicbooleanaccept(Filef){returnf.isDirectory();}
};
privateFileTreeModel(){rootFiles=File.listRoots();}
publicObjectgetRoot(){returnroot;}
publicObjectgetChild(Objectparent,intindex){
if(parent==getRoot())returnrootFiles[index];
if(parentinstanceofFile){
Filepf=(File)parent;
returnpf.listFiles(dirFilter)[index];
}
returnnull;
}
publicintgetChildCount(Objectparent){
if(parent==getRoot())returnrootFiles.length;
if(parentinstanceofFile){
Filepf=(File)parent;
File[]fs=pf.listFiles(dirFilter);
returnfs==null?0:fs.length;
}
return0;
}
publicbooleanisLeaf(Objectnode){returnfalse;}
publicvoidvalueForPathChanged(TreePathpath,ObjectnewValue){}
publicvoidaddTreeModelListener(TreeModelListenerl){}
publicvoidremoveTreeModelListener(TreeModelListenerl){}
publicintgetIndexOfChild(Objectparent,Objectchild){
if(parent==getRoot()){
for(inti=0,j=rootFiles.length;i
if(rootFiles[i]==child)returni;
}
if(parentinstanceofFile){
Filepf=(File)parent;
File[]fs=pf.listFiles(dirFilter);
for(inti=0,j=fs.length;i
if(fs[i].equals(child))returni;
}
}
return-1;
}
}
privateclassFileTableModelextendsAbstractTableModel{
publicintgetRowCount(){returndir==null||dir.isFile()?0:dir.listFiles().length;}
publicintgetColumnCount(){return3;}
privateFiledir;
privatevoidsetDir(Filedir){
this.dir=dir;
fireTableDataChanged();
}
publicClass>getColumnClass(intcolumnIndex){
switch(columnIndex){
case0:returnFile.class;
case1:returnInteger.class;
case2:returnCalendar.class;
default:returnString.class;
}
}
publicStringgetColumnName(intcolumn){
switch(column){
case0:return"名称";
case1:return"大小e68a84e8a2ad62616964757a686964616f31333262363662";
case2:return"修改日期";
default:return"";
}
}
publicObjectgetValueAt(introwIndex,intcolumnIndex){
File[]fs=dir.listFiles();
Filef=fs[rowIndex];
switch(columnIndex){
case0:returnf;
case1:
if(f.isDirectory())returnnull;
try{
if(f.canRead())
returnnewFileInputStream(f).available();
}catch(IOExceptione){
e.printStackTrace();
}
case2:
Calendarcl=Calendar.getInstance();
cl.setTimeInMillis(f.lastModified());
returncl;
}
returnnull;
}
}
privateclass_DirSelectionListenerimplementsTreeSelectionListener{
publicvoidvalueChanged(TreeSelectionEvente){
TreePathpath=e.getNewLeadSelectionPath();
if(path!=null){
Objectobj=path.getLastPathComponent();
if(objinstanceofFile){
Filef=(File)obj;
File[]fs=f.listFiles();
statusLabel.setText(fs==null?null:MessageFormat.format("{0}个文件",fs.length));
}
else
statusLabel.setText(null);
}
}
}
privateclassDirCellRendererextendsJLabelimplementsTreeCellRenderer{
publicbooleanisOpaque(){returntrue;}
publicComponentgetTreeCellRendererComponent(JTreetree,Objectvalue,booleanselected,booleanexpanded,booleanleaf,introw,booleanhasFocus){
if(valueinstanceofFile){
Strings=((File)value).getName();
setText(s.isEmpty()?value.toString():s);
}
else
setText(value.toString());
setForeground(selected?Color.BLUE:Color.BLACK);
setBackground(selected?Color.YELLOW:Color.WHITE);
returnthis;
}
}
privateclassSelectionListenerimplementsTreeSelectionListener{
publicvoidvalueChanged(TreeSelectionEvente){
Objectobj=e.getNewLeadSelectionPath().getLastPathComponent();
if(objinstanceofFile){
tableModel.setDir((File)obj);
}
}
}
privateclassDirCellSelectedListenerimplementsKeyListener,MouseListener{
privateJTreetree;
privateDirCellSelectedListener(JTreet){tree=t;}
privatevoidaction(InputEvente){
if(einstanceofMouseEvent){
}
if(einstanceofKeyEvent){
}
}
privatevoidexpand(Filef){
if(f.isDirectory()){
ArrayListL=newArrayList();
L.add(f);
FileparentFile=f.getParentFile();
while(parentFile!=null){
L.add(parentFile);
parentFile=parentFile.getParentFile();
}
TreePathtreePath=newTreePath(FileTreeModel.root);
for(inti=L.size()-1;i>-1;i--){
treePath=treePath.pathByAddingChild(L.get(i));
}
tree.setSelectionPath(treePath);
}
}
publicvoidkeyTyped(KeyEvente){}
publicvoidkeyPressed(KeyEvente){
if(e.getKeyCode()!=KeyEvent.VK_ENTER)return;
if(e.getSource()==detailTable){
introw=detailTable.getSelectedRow();
if(row!=-1){
Filef=(File)detailTable.getValueAt(row,0);
expand(f);
}
}
}
publicvoidkeyReleased(KeyEvente){
}
publicvoidmouseClicked(MouseEvente){
if(e.getClickCount()==2){
if(e.getSource()==detailTable){
introw=detailTable.getSelectedRow();
if(row!=-1){
Filef=(File)detailTable.getValueAt(row,0);
expand(f);
}
}
}
}
publicvoidmousePressed(MouseEvente){
}
publicvoidmouseReleased(MouseEvente){
}
publicvoidmouseEntered(MouseEvente){
}
publicvoidmouseExited(MouseEvente){
}
}
}
