Java文本編輯器實現(xiàn)方法詳解

更新時間：2019年03月13日 12:02:54 作者：水中魚之1999

這篇文章主要介紹了Java文本編輯器實現(xiàn)方法,結(jié)合實例形式詳細(xì)分析了java文本編輯器結(jié)構(gòu)、原理、布局、實現(xiàn)步驟與相關(guān)操作技巧,需要的朋友可以參考下

本文實例講述了Java文本編輯器實現(xiàn)方法。分享給大家供大家參考，具體如下：

結(jié)構(gòu)分析：

界面布局： EditFrame
main方法所在： EditText
打開功能實現(xiàn)： FileReadThread
保存跟能實現(xiàn)： save

實際運行效果：

附：完整代碼實現(xiàn)

一、 EditFrame

包括一個菜單Menu

底部：日期時間

代碼附上：

public class EditFrame extends JFrame {
 // TODO 自動生成的構(gòu)造函數(shù)存根
 boolean saveFlag = false;
 File saveFileRoot = null;
 JFrame jFrame;
 JPanel jPanelSouth;
 JMenuBar jMenuBar1;
 JMenu jMenu1;
 JMenuItem jMenuItem1;
 JMenuItem jMenuItem2;
 JMenuItem jMenuItem3;
 JMenuItem jMenuItem4;
 JSeparator jSeparator1;
 JTextArea jTextArea;
 JScrollPane scrollPane;// 滾動條
 public EditFrame() {
 // TODO 自動生成的構(gòu)造函數(shù)存根
 jFrame = new JFrame("水中魚之1999-文本編輯器");
 jPanelSouth = new JPanel();
 jMenuBar1 = new JMenuBar();
 jMenu1 = new JMenu("文件");
 jMenuItem1 = new JMenuItem("打開");
 jMenuItem2 = new JMenuItem("保存");
 jMenuItem3 = new JMenuItem("另存為");
 jMenuItem4 = new JMenuItem("退出");
 jSeparator1 = new JSeparator();
 jTextArea = new JTextArea();
 scrollPane = new JScrollPane(jTextArea);
 jFrame.setSize(800, 500);
 jFrame.setLocationRelativeTo(null);
 jFrame.setVisible(false);
 
 setLayout();
 setSouthPanel();
 // set relationship for your component
 setRelationShip();
 // 設(shè)置 scrollPane for TextArea
 setScscrollPane();
 iniClick();
 }
 private void setRelationShip() {
 jFrame.add(BorderLayout.CENTER, scrollPane);
 jFrame.add(BorderLayout.SOUTH, jPanelSouth);
 jMenu1.add(jMenuItem1);
 jMenu1.add(jMenuItem2);
 jMenu1.add(jMenuItem3);
 jMenu1.add(jSeparator1);
 jMenu1.add(jMenuItem4);
 jMenuBar1.add(jMenu1);
 jFrame.setJMenuBar(jMenuBar1);
 }
 private void setLayout() {
 GridLayout gridLayout = new GridLayout(1, 2);
 jPanelSouth.setLayout(gridLayout);
 }
 private void setScscrollPane() {
// jTextArea.setLineWrap(true);// 設(shè)置滿一行自動換行
 scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
 }
 private void setSouthPanel() {
 // add time for SouthPanel
 JLabel jLabelDate = new JLabel("Date");
 JLabel jLabelTime = new JLabel("Time");
 Timer timeAction = new Timer(1000, new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  long timemillis = System.currentTimeMillis();
  // 轉(zhuǎn)換日期顯示格式
  SimpleDateFormat date = new SimpleDateFormat("yyyy 年 MM 月 dd 日 ");
  jLabelDate.setText("  當(dāng)前日期： " + date.format(new Date(timemillis)));
  SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss ");
  jLabelTime.setText("  當(dāng)前時間： " + time.format(new Date(timemillis)));
  }
 });
 jPanelSouth.add(jLabelDate);
 jPanelSouth.add(jLabelTime);
 timeAction.start();
 }
 private void iniClick() {
 jFrame.addWindowListener(new WindowListener() {
  @Override
  public void windowOpened(WindowEvent e) {
  // TODO Auto-generated method stub
  }
  @Override
  public void windowIconified(WindowEvent e) {
  // TODO Auto-generated method stub
  }
  @Override
  public void windowDeiconified(WindowEvent e) {
  // TODO Auto-generated method stub
  }
  @Override
  public void windowDeactivated(WindowEvent e) {
  // TODO Auto-generated method stub
  }
  @Override
  public void windowClosing(WindowEvent e) {
  // TODO Auto-generated method stub
  int x = JOptionPane.showConfirmDialog(null, "確認(rèn)退出么？", "友情提示", JOptionPane.OK_CANCEL_OPTION,
   JOptionPane.WARNING_MESSAGE);
  if (x == 0) {
   System.exit(0);
  }
  }
  @Override
  public void windowClosed(WindowEvent e) {
  // TODO Auto-generated method stub
  }
  @Override
  public void windowActivated(WindowEvent e) {
  // TODO Auto-generated method stub
  }
 });
 jMenuItem4.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  int x = JOptionPane.showConfirmDialog(null, "確認(rèn)退出么？", "友情提示", JOptionPane.OK_CANCEL_OPTION,
   JOptionPane.WARNING_MESSAGE);
  if (x == 0) {
   System.exit(0);
  }
  }
 });
 jMenuItem1.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  FileReadThread fileReadThread = new FileReadThread(EditFrame.this);// 開啟文件讀取線程
  fileReadThread.start();
  System.out.println(saveFileRoot);
  saveFlag = true;
  jTextArea.setText("");
  }
 });
 jMenuItem3.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  Save save = new Save(EditFrame.this);
  save.start();
  saveFlag = true;
  }
 });
 jMenuItem2.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  if (!saveFlag) {
   Save save = new Save(EditFrame.this);
   save.start();
   saveFlag = true;
  } else {
   new Save(EditFrame.this, saveFileRoot);
  }
  }
 });
 }
 public JTextArea getjTextArea() {
 return jTextArea;
 }
 public void setjTextArea(JTextArea jTextArea) {
 this.jTextArea = jTextArea;
 }
 public File getSaveFileRoot() {
 return saveFileRoot;
 }
 public void setSaveFileRoot(File saveFileRoot) {
 this.saveFileRoot = saveFileRoot;
 }
 public JFrame getjFrame() {
 return jFrame;
 }
 public void setjFrame(JFrame jFrame) {
 this.jFrame = jFrame;
 }
}

二、測試類 EditText

分兩部分：

1.閃屏由于加載頁面需要時間原想用 SplashScreen 由于打包成jar包才能用所以這里用jframe進(jìn)行替代

閃屏圖片直接粘貼到：

2.new 一個EditFrame 對象，閃屏結(jié)束后設(shè)置為可見

public class EditText {
 public static void main(String[] args) {
 new Thread() {
  @Override
  public void run() {
  // TODO Auto-generated method stub
  EditFrame editFrame = new EditFrame();
  
  JFrame jFrame = new JFrame();
  JPanel jPanel = new javax.swing.JPanel(){
    protected void paintComponent(java.awt.Graphics g){
      super.paintComponent(g);
      g.drawImage(new ImageIcon("experiment_bac.jpg").getImage(),0,0,400,250,null);
    }
  };
  jFrame.add(jPanel);
  jFrame.setVisible(true);
  jFrame.setSize(400, 300);
  jFrame.setLocationRelativeTo(null);
  
  try {
   sleep(1500);
  } catch (InterruptedException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  jFrame.dispose();
  editFrame.getjFrame().setVisible(true);
  }
 }.start();
 }
}

三、FileReadThread

調(diào)用swing自帶的 JFileChooser

選擇文件路徑

class FileReadThread extends Thread {
 private EditFrame test;
 public FileReadThread(EditFrame test ) {
 this.test = test;
 }
 @Override
 public void run() {
 JFileChooser chooser = new JFileChooser("d:/");
 chooser.setFileFilter(new FileFilter() {// 定義文件過濾器,僅顯示文件夾和txt文本
  @Override
  public String getDescription() {
  return null;
  }
  @Override
  public boolean accept(File file) {
  if (file.isDirectory() || file.getName().endsWith(".txt"))
   return true;
  return false;
  }
 });
 int option = chooser.showOpenDialog(test);
 if (option == JFileChooser.APPROVE_OPTION) {
  File selFile = chooser.getSelectedFile();
  try {
  BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(selFile), "gbk"));
  test.setSaveFileRoot(selFile);
  String line = null;
  while ((line = reader.readLine()) != null) {
   test.getjTextArea().append(line + "\n");
   Thread.sleep(30);// 線程暫停,以看到讀取過程效果
  }
  } catch (Exception e1) {
  e1.printStackTrace();
  }
  JOptionPane.showMessageDialog(test, "讀取完畢");
 }
 }
}

四、save 保存

保存的調(diào)用分三種：

如果該文件是打開的那么保存到打開文件中
如果該文件還未保存這調(diào)用：進(jìn)行保存
如果該文件已經(jīng)另存為，則直接保存到另存為得的目錄下

public class Save extends Thread {
 private EditFrame area;
 private File saveFileRoot = null;
 public Save(EditFrame area, File saveFileRoot) {
 System.out.println(saveFileRoot + "123");
 String text = area.getjTextArea().getText();
 String[] lines = text.trim().split("\n");
 try {
  PrintWriter out = new PrintWriter(new FileOutputStream(saveFileRoot), true);
  for (String line : lines)
  out.println(line);
 } catch (FileNotFoundException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 }
 public Save(EditFrame area) {
 this.area = area;
 JFileChooser chooser = new JFileChooser();
 chooser.setCurrentDirectory(new File("."));
 chooser.setFileFilter(new FileFilter() {
  @Override
  public boolean accept(File f) {
  return f.getName().toLowerCase().endsWith(".txt");
  }
  @Override
  public String getDescription() {
  return "SAVE TO";
  }
 });
 int r = chooser.showSaveDialog(area);
 if (r != JFileChooser.APPROVE_OPTION)
  return;
 File f = chooser.getSelectedFile();
 area.setSaveFileRoot(f);
 String text = area.getjTextArea().getText();
 String[] lines = text.trim().split("\n");
 try {
  PrintWriter out = new PrintWriter(new FileOutputStream(f), true);
  for (String line : lines)
  out.println(line);
 } catch (FileNotFoundException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 }
 public File getSaveFileRoot() {
 return saveFileRoot;
 }
 public void setSaveFileRoot(File saveFileRoot) {
 this.saveFileRoot = saveFileRoot;
 }
}

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