jfilechooserframe.java~34~

JAVA教学用代码

package jfilechooserexample;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextArea;
import javax.swing.JFileChooser;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;
import java.io.File;
import java.io.FileInputStream;
import java.io.*;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;

public class JFileChooserFrame extends JFrame {
    JPanel contentPane;
    BorderLayout borderLayout1 = new BorderLayout();
    JPanel jPanel1 = new JPanel();
    JButton jButton1 = new JButton();
    JPanel jPanel2 = new JPanel();
    JTextArea jTextArea1 = new JTextArea();
    BorderLayout borderLayout2 = new BorderLayout();

    JFileChooser jFileChooser1 = new JFileChooser("d:\\");
    JButton jButton2 = new JButton();
    JMenuBar jMenuBar1 = new JMenuBar();
    JMenu jMenu1 = new JMenu();
    JMenuItem jMenuItem1 = new JMenuItem();
    JMenuItem jMenuItem2 = new JMenuItem();
    JFileChooser jFileChooser2 = new JFileChooser("d:\\");
    public JFileChooserFrame() {
        try {
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    /**
     * Component initialization.
     *
     * @throws java.lang.Exception
     */
    private void jbInit() throws Exception {
        contentPane = (JPanel) getContentPane();
        contentPane.setLayout(borderLayout1);
        this.setJMenuBar(jMenuBar1);
        setSize(new Dimension(400, 300));
        setTitle("Frame Title");
        jButton1.setText("打开");
        jButton1.addActionListener(new JFileChooserFrame_jButton1_actionAdapter(this));
        jPanel2.setLayout(borderLayout2);
        jButton2.setText("保存");
        jButton2.addActionListener(new JFileChooserFrame_jButton2_actionAdapter(this));
        jMenu1.setText("文件");
        jMenuItem1.setText("打开");
        jMenuItem1.addActionListener(new
                                     JFileChooserFrame_jMenuItem1_actionAdapter(this));
        jMenuItem2.setText("保存");
        jPanel1.add(jButton1);
        jPanel1.add(jButton2);
        contentPane.add(jPanel2, java.awt.BorderLayout.CENTER);
        contentPane.add(jPanel1, java.awt.BorderLayout.NORTH);
        jPanel2.add(jTextArea1, java.awt.BorderLayout.CENTER);
        jMenuBar1.add(jMenu1);
        jMenu1.add(jMenuItem1);
        jMenu1.add(jMenuItem2);
    }

    public void jButton1_actionPerformed(ActionEvent e) {

        jFileChooser1.setApproveButtonText("aaa"); //确定按钮
        jFileChooser1.setDialogTitle("打开文件");
        //设置过滤文件
        //自定义类JAVAFileFiler
        jFileChooser1.addChoosableFileFilter(new JAVAFileFilter("java"));
        jFileChooser1.addChoosableFileFilter(new JAVAFileFilter("txt"));
        //设置图片
        jFileChooser1.setFileView(new FileIcon());

        int result = jFileChooser1.showOpenDialog(this);
        File file = null;
        if (result == JFileChooser.CANCEL_OPTION) {
            JOptionPane.showMessageDialog(this, "没有选择文件！");
        }
        if (result == JFileChooser.APPROVE_OPTION) {

            file = jFileChooser1.getSelectedFile();
            JOptionPane.showMessageDialog(this, "你选择的文件名" + file.getName());
        }
//        FileInputStream fileInputStream=null;
        FileReader fileInputStream = null;
        BufferedReader bu = null;
        if (file != null) {
            try {
//                fileInputStream = new FileInputStream(file);
                fileInputStream = new FileReader(file);
                bu = new BufferedReader(fileInputStream);

            } catch (FileNotFoundException ex) {
            }
            int readbyte;
            String readstr = null;
            try {
//                while ((readbyte = fileInputStream.read()) != -1) {
//                    jTextArea1.append(String.valueOf((char)readbyte));
//                }
                while ((readstr = bu.readLine()) != null) {
                    jTextArea1.append(readstr);
                    jTextArea1.append("\n");
                }
            } catch (IOException ex1) {
                JOptionPane.showMessageDialog(this, "文件错误！");
            } finally {
                try {
                    if (fileInputStream != null) {
                        fileInputStream.close();
                    }
                } catch (IOException ioe2) {

                }
            }
        }
    }

    public void jButton2_actionPerformed(ActionEvent e) {
        int result = jFileChooser1.showSaveDialog(this);
        File file = null;
        FileWriter fw = null;
        BufferedWriter buw = null;
        if (result == jFileChooser1.APPROVE_OPTION) {
            file = jFileChooser1.getSelectedFile();
            JOptionPane.showMessageDialog(this, "文件名：" + file, "有情提示",
                                          JOptionPane.DEFAULT_OPTION);

        }
        if (result == jFileChooser1.CANCEL_OPTION) {
            JOptionPane.showMessageDialog(this, "没有文件名");
        }
        if (file != null) {
            try {
                fw = new FileWriter(file);
                buw = new BufferedWriter(fw);

            } catch (IOException ex) {
            }
            String content=jTextArea1.getText();
            System.out.println(content);
            try {

                buw.write(content);
                buw.flush();

            } catch (IOException ex1) {
            }
            finally
            {
                try {
                    if (fw != null) {
                        buw.close();
                        fw.close();
                    }
                } catch (Exception ex2) {
                }
            }
        }
    }

    public void jMenuItem1_actionPerformed(ActionEvent e) {
        jFileChooser2.showOpenDialog(this);
    }
}


class JFileChooserFrame_jMenuItem1_actionAdapter implements ActionListener {
    private JFileChooserFrame adaptee;
    JFileChooserFrame_jMenuItem1_actionAdapter(JFileChooserFrame adaptee) {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e) {
        adaptee.jMenuItem1_actionPerformed(e);
    }
}


class JFileChooserFrame_jButton2_actionAdapter implements ActionListener {
    private JFileChooserFrame adaptee;
    JFileChooserFrame_jButton2_actionAdapter(JFileChooserFrame adaptee) {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e) {
        adaptee.jButton2_actionPerformed(e);
    }
}


class JFileChooserFrame_jButton1_actionAdapter implements ActionListener {
    private JFileChooserFrame adaptee;
    JFileChooserFrame_jButton1_actionAdapter(JFileChooserFrame adaptee) {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e) {
        adaptee.jButton1_actionPerformed(e);
    }
}