Javafx简单实现【我的电脑资源管理器】效果

本文实例讲述了Javafx简单实现【我的电脑资源管理器】效果。分享给大家供大家参考。具体如下：

1. java代码：

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									package ttt;

									import java.io.File;

									import javafx.application.Application;

									import javafx.beans.value.ChangeListener;

									import javafx.beans.value.ObservableValue;

									import javafx.collections.FXCollections;

									import javafx.collections.ObservableList;

									import javafx.scene.Scene;

									import javafx.scene.control.TableColumn;

									import javafx.scene.control.TableView;

									import javafx.scene.control.TreeItem;

									import javafx.scene.layout.BorderPane;

									import javafx.scene.layout.HBox;

									import javafx.scene.layout.Priority;

									import javafx.stage.Stage;

									import javafx.scene.control.TreeView;

									import javafx.scene.control.cell.PropertyValueFactory;

									public class TreeViews extends Application {

									  public static ObservableList<FileDetail> data = FXCollections.observableArrayList();

									  public static void main(String[] args) {

									    launch(args);

									  }

									  @Override

									  public void start(Stage primaryStage) {

									    primaryStage.setTitle("Javafx 实现\"我的电脑\"资源管理器");

									    TreeItem<File> rootItem = new TreeItem<>(new File(System.getenv("COMPUTERNAME")));

									    for (File file : File.listRoots()) {

									      FileTreeItem rootsitem = new FileTreeItem(file);

									      rootItem.getChildren().add(rootsitem);

									    }

									    TreeView<File> tree = new TreeView<File>(rootItem);

									    HBox root = new HBox();

									    TableView<FileDetail> tableView = new TableView<>(data);

									    TableColumn<FileDetail, String> firstColumn = new TableColumn<>("文件");

									    firstColumn.setCellValueFactory(new PropertyValueFactory<FileDetail, String>("FileName"));

									    firstColumn.setPrefWidth(120);

									    TableColumn<FileDetail, String> secondColumn = new TableColumn<>("类型");

									    secondColumn.setCellValueFactory(new PropertyValueFactory<FileDetail, String>("type"));

									    secondColumn.setPrefWidth(120);

									    TableColumn<FileDetail, String> thirdColumn = new TableColumn<>("最后修改");

									    thirdColumn.setCellValueFactory(new PropertyValueFactory<FileDetail, String>("LastModified"));

									    thirdColumn.setPrefWidth(200);

									    tableView.getColumns().setAll(firstColumn, secondColumn, thirdColumn);

									    HBox.setHgrow(tree, Priority.ALWAYS);

									    HBox.setHgrow(tableView, Priority.ALWAYS);

									    root.getChildren().addAll(tree,tableView);

									    tree.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TreeItem<File>>() {

									      @Override

									      public void changed(ObservableValue<? extends TreeItem<File>> observable, TreeItem<File> oldValue,

									          TreeItem<File> newValue) {

									        ObservableList<TreeItem<File>> treelist = newValue.getChildren();

									        ObservableList<FileDetail> tablelist = FXCollections.observableArrayList();

									        for (TreeItem<File> item : treelist) {

									          FileDetail filedetail = new FileDetail(item.getValue());

									          tablelist.add(filedetail);

									        }

									        data.setAll(tablelist);

									      }

									    });

									    primaryStage.setScene(new Scene(root));

									    primaryStage.setHeight(600);

									    primaryStage.show();

									  }

									}

2. java代码：

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									package ttt;

									import java.io.File;

									import java.text.SimpleDateFormat;

									import java.util.Date;

									public class FileDetail {

									  private String FileName;

									  private String LastModified;

									  private boolean isFile;

									  private boolean isFolder;

									  private boolean exists;

									  private String type;

									  private long length;

									  private SimpleDateFormat fmt;

									  public FileDetail(File file) {

									    isFile = file.isFile();

									    isFolder = file.isDirectory();

									    exists = file.exists();

									    if (exists) {

									      this.FileName = file.getName();

									      fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm");

									      Date date = new Date(file.lastModified());

									      this.LastModified = fmt.format(date);

									      this.length = file.length();

									      if (isFolder) {

									        this.type = "Folder";

									      } else

									        this.type = String.valueOf(this.length / (long) 1024) + "KB";

									    }

									  }

									  public String getFileName() {

									    return FileName;

									  }

									  public void setFileName(String fileName) {

									    FileName = fileName;

									  }

									  public String getLastModified() {

									    return LastModified;

									  }

									  public void setLastModified(String lastModified) {

									    LastModified = lastModified;

									  }

									  public String getType() {

									    return type;

									  }

									  public void setType(String type) {

									    this.type = type;

									  }

									  public long getLength() {

									    return length;

									  }

									  public void setLength(long length) {

									    this.length = length;

									  }

									}

3. java代码：

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									package ttt;

									import java.io.File;

									import javafx.collections.FXCollections;

									import javafx.collections.ObservableList;

									import javafx.scene.control.TreeItem;

									public class FileTreeItem extends TreeItem<File> {

									   private boolean isLeaf;

									   private boolean isFirstTimeChildren = true;

									   private boolean isFirstTimeLeaf = true;

									  public FileTreeItem(File file) {

									    super(file);

									  }

									  @Override

									  public ObservableList<TreeItem<File>> getChildren() {

									     if (isFirstTimeChildren) {

									      isFirstTimeChildren = false;

									       super.getChildren().setAll(buildChildren(this));

									    } 

									      return super.getChildren(); 

									  }

									  @Override

									  public boolean isLeaf() {

									    if (isFirstTimeLeaf) {

									      isFirstTimeLeaf = false;

									      File f = (File) getValue();

									      isLeaf = f.isFile();

									    }

									    return isLeaf;

									  }

									private ObservableList<TreeItem<File>> buildChildren(TreeItem<File> TreeItem) {

									  File f = TreeItem.getValue();

									  if (f != null && f.isDirectory()) {

									    File[] files = f.listFiles();

									    if (files != null) {

									      ObservableList<TreeItem<File>> children = FXCollections.observableArrayList();

									      for (File childFile : files) {

									        children.add(new FileTreeItem (childFile));

									      }

									      return children;

									    }

									  }

									  return FXCollections.emptyObservableList();

									}

									}