fileattr.java

电子工业出版社的<Java案例开发集锦>一书源代码

package jfiledemo;

import javax.swing.UIManager;
import java.awt.*;
import javax.swing.JTable;
import java.awt.event.ActionEvent;
import javax.swing.JTextField;
import javax.swing.JScrollPane;
import java.awt.event.WindowEvent;
import javax.swing.JPanel;
import java.io.File;
import javax.swing.JFrame;
import javax.swing.JButton;

public class FileAttr {
  private boolean packFrame = false;

  ////构造方法
  public FileAttr() {
    MainFrame frame = new MainFrame();
     if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //居中处理
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }
  //Main（）方法
  public static void main(String[] args) {
   new FileAttr();
  }
}
class MainFrame extends JFrame {
  private JPanel contentPane;
  private BorderLayout borderLayout1 = new BorderLayout();
  private JTextField jTextField1 = new JTextField();
  private JScrollPane jScrollPane1 = new JScrollPane();
  private JTable jTable1;
  private JButton jButton1 = new JButton();
  File file;
  //构造窗体
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();//调用jbInit()方法
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //部件初始化
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    jTextField1.setText("File or Dir Abstract Path"); //设置文本域的文本
    contentPane.setLayout(borderLayout1); //设置布局
    this.setSize(new Dimension(394, 164));         //设置尺寸
    this.setTitle("JFileDemo");                   //设置标题
    jScrollPane1.setAutoscrolls(true);              //自动滚屏
    jButton1.setText("View");                    //按钮名称
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    contentPane.add(jButton1, BorderLayout.SOUTH);        //加入按钮
    contentPane.add(jTextField1, BorderLayout.NORTH);      //加入文本域
    contentPane.add(jScrollPane1, BorderLayout.CENTER);    //加入ScrollPanel
  }
  //处理窗口事件
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
  Object[] getFileInfoType(){
    return new Object[]{"Name","isFile","length","canRead","canWrite","lastMotified","isHidden"};
  }
  Object[][] getFileInfo(File file){
    File theFile = file;
    Object[][] data = new Object[1][7];
        //用File类的各种方法获取文件属性，保存到data数组中
    if (!theFile.exists())
      return null;
    data[0][0] = theFile.getName();
    data[0][1] = String.valueOf(theFile.isFile());
    data[0][2] = String.valueOf(theFile.length());
    data[0][3] = String.valueOf(theFile.canRead());
    data[0][4] = String.valueOf(theFile.canWrite());
    data[0][5] = String.valueOf(theFile.lastModified());
    data[0][6] = String.valueOf(theFile.isHidden());

    return data;
  }
  void jButton1_actionPerformed(ActionEvent e) {
    file = new File(this.jTextField1.getText());
    this.jTable1 = new JTable(this.getFileInfo(file),this.getFileInfoType());
    jScrollPane1.getViewport().add(jTable1, null);

  }
}