package cn.ts.jfilechooser;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class Demo {
    public static void main(String args[]){
    
        new Note();
    }
}
class Note implements ActionListener {
   private JTextArea area=new JTextArea(8,10);
   private JFrame frame=new JFrame("文件选择");  
   private JButton open=new JButton("打开文件");
   private JButton save=new JButton("存储文件");
   private JLabel lab=new JLabel("现在没有打开文件");
   private JPanel pan=new JPanel();
   public void Note(){
       this.pan.add(open);
       this.pan.add(save);
       frame.setLayout(new BorderLayout(3,3));
       frame.add(this.lab);
       frame.add(this.pan);
       frame.add(new JScrollPane(this.area),BorderLayout.CENTER);
       this.frame.setSize(330,180);
       this.frame.setVisible(true);
       this.frame.addWindowListener(new WindowAdapter(){
           public void windowClosing(WindowEvent e){
               System.exit(1);
           }
       });
       this.open.addActionListener(this);
       this.save.addActionListener(this);
       frame.setSize(300,200);
       frame.setVisible(true);
       
   }
    @Override
    public void actionPerformed(ActionEvent arg0) {
        // TODO Auto-generated method stub
        File file=null;
        int result=0;
        JFileChooser fileChooser=new JFileChooser();
        if(arg0.getSource()==this.open){
            this.area.setText("");
            fileChooser.setApproveButtonText("确定");
            fileChooser.setDialogTitle("打开文件");
            result=fileChooser.showOpenDialog(this.frame);
            if(result==JFileChooser.APPROVE_OPTION){
                file=fileChooser.getSelectedFile();
                this.lab.setText("打开的文件名称"+file.getName());
            }else if(result==JFileChooser.CANCEL_OPTION){
                this.lab.setText("没有选择文件");
            }else{
                this.lab.setText("操作有误");
            }
            if(file!=null){
                try{
                    Scanner scan=new Scanner(new FileInputStream(file));
                    scan.useDelimiter("\n");
                    while(scan.hasNext()){
                        this.area.append(scan.next());
                        this.area.append("\n");
                    }
                    scan.close();
                }catch(Exception e){
                    this.lab.setText("读文件出错");
                }
            }
        }
       
    }
}

 public static void main(String args[]){
    
        new Note();
    }