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Javafx简单实现【我的电脑资源管理器】效果

2019年07月22日  | 移动技术网IT编程  | 我要评论

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：

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：

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：

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();
}
}

4. 运行效果截图：

希望本文所述对大家的java程序设计有所帮助。

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