用java实现的文本编辑器可以媲美windows自带的编辑器吗？（功能全，超详细）

介绍

1.菜单栏（文本，编辑，格式，关于）

2.文本子菜单及其功能

3.编辑子菜单及其功能

4.格式子菜单及其功能

5.关于

实现功能

1. 编辑器可以打开，保存，另存为，关闭文件。
2. 编辑器可以撤销，恢复，剪切，复制黏贴文本。
3. 编辑器可以设置编码和解码的格式(慎用)
4. 编辑器支持ctrl+s,ctrl+c,ctrl+v,ctrl+z,ctrl+y等快捷键。
5. 编辑器支持ctrl+鼠标滚轮放大和缩小字体。
6. 编辑器下方有状态栏，显示当前文本状态，字体大小以及有效字数统计。

入口index文件

index.java

package main;import main.TextEditBox;public class index {// 主函数public static void main(String[] args) {TextEditBox notePad = new TextEditBox();notePad.launchFrame();}
}

主体编辑器对象文件

阅读提示：从最后的launchFrame方法开始阅读本段代码会更加清晰

TextEditBox.java

package main;import main.tools;import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.*;
import java.io.*;import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.UndoManager;public class TextEditBox extends JFrame {/**** @author zzh* @Time 2020-7-23**/private static final long serialVersionUID = 1L;private boolean isChanged = false;private File file = null;private JMenuBar bar = null;private JMenu dJMenu = null;private JMenu eJMenu = null;private JMenu aJMenu = null;private JMenu cJMenu = null;private JMenu encodeItem = null;private JMenu decodeItem = null;private JMenuItem openItem = null;private JMenuItem saveItem = null;private JMenuItem saveAsItem = null;private JMenuItem closeItem = null;private JMenuItem undoItem = null;private JMenuItem redoItem = null;private JMenuItem cutItem = null;private JMenuItem copyItem = null;private JMenuItem pasteItem = null;private JRadioButton en_utf_8_Item = null;private JRadioButton en_gbk_Item = null;private JRadioButton de_utf_8_Item = null;private JRadioButton de_gbk_Item = null;private JMenuItem aboutItem = null;private JFileChooser jfc = null;private JTextArea ta = null;private JScrollPane scrollPane = null;private JPanel jDown = null;private JLabel labelLeft = null;private JLabel labelCenter = null;private JLabel labelRight = null;//编码格式private String encode = "UTF-8";private String decode = "UTF-8";// ctrl键是否按下private boolean key_ctrl = false;// 是否在打开文件private boolean isOpen = false;// 系统滚动条private MouseWheelListener sysWheel;// 文本域字体大小Font f = new Font("Serif", 0, 28);// 撤销的监听器UndoManager um = new UndoManager();public TextEditBox() {// 初始化jfc(文件选择器)jfc = new JFileChooser();}// 内部类private class event extends MouseAdapter {@Overridepublic void mouseWheelMoved(MouseWheelEvent e) {if (e.isControlDown()) {// 当ctrl键被按下，滚动为放大缩小// System.out.println(e.getWheelRotation());if (e.getWheelRotation() < 0 && f.getSize() < 60) {// 如果滚动条向前就放大文本f = new Font(f.getFamily(), f.getStyle(), f.getSize() + 1);ta.setFont(f);} else if (e.getWheelRotation() > 0 && f.getSize() > 0) {// 滚动条向后就缩小文本f = new Font(f.getFamily(), f.getStyle(), f.getSize() - 1);ta.setFont(f);}labelCenter.setText("字体大小：" + f.getSize());} else {// 当ctrl没有被按下，则为系统滚动scrollPane.addMouseWheelListener(sysWheel);sysWheel.mouseWheelMoved(e);// 触发系统滚动事件。scrollPane.removeMouseWheelListener(sysWheel);}}}// 内部类private class change implements DocumentListener {@Overridepublic void insertUpdate(DocumentEvent e) {changedUpdate(e);}@Overridepublic void removeUpdate(DocumentEvent e) {changedUpdate(e);}@Overridepublic void changedUpdate(DocumentEvent e) {changed();}public void changed() {if(!isOpen) {isChanged = true;labelLeft.setText("修改状态：已修改");// 统计字数labelRight.setText("字数：" + tools.replaceBlank(ta.getText()));}}}//重新打开读取public void openagainDialog() {isOpen = true;BufferedReader br = null;if (file != null) {String str = "";try {InputStreamReader fReader = new InputStreamReader(new FileInputStream(file),decode);br = new BufferedReader( fReader);ta.setText("");str = br.readLine();while (str != null) {ta.append(str + '\n');str = br.readLine();}} catch (FileNotFoundException e1) {ta.setText(ta.getText() + '\n' + "文件未找到");e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();} finally {if (br != null) {try {br.close();} catch (IOException e1) {e1.printStackTrace();}}isOpen = false;isChanged = false;labelLeft.setText("状态：已打开");this.setTitle(file.getName());labelRight.setText("字数：" + tools.replaceBlank(ta.getText()));}}}// 打开文件读取对话框的方法，打开控件调用此方法public void openOpenDialog() {isOpen = true;int status = jfc.showOpenDialog(TextEditBox.this);BufferedReader br = null;if (status == JFileChooser.APPROVE_OPTION) {file = jfc.getSelectedFile();String str = "";try {InputStreamReader fReader = new InputStreamReader(new FileInputStream(file),decode);br = new BufferedReader( fReader);ta.setText("");str = br.readLine();while (str != null) {ta.append(str + '\n');str = br.readLine();}} catch (FileNotFoundException e1) {ta.setText(ta.getText() + '\n' + "文件未找到");e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();} finally {if (br != null) {try {br.close();} catch (IOException e1) {e1.printStackTrace();}}isOpen = false;isChanged = false;labelLeft.setText("状态：已打开");this.setTitle(file.getName());labelRight.setText("字数：" + tools.replaceBlank(ta.getText()));}}}// 打开文件保存对话框的方法，保存和另存为时调用此方法public void openSaveDialog() {int status = jfc.showSaveDialog(TextEditBox.this);BufferedWriter bw = null;if (status == JFileChooser.APPROVE_OPTION) {file = jfc.getSelectedFile();try {OutputStreamWriter fWriter = new OutputStreamWriter(new FileOutputStream(file),encode);bw = new BufferedWriter(fWriter);String[] strs = ta.getText().split("\n");for (String str : strs) {bw.write(str);bw.newLine();bw.flush();}} catch (FileNotFoundException e1) {ta.setText(ta.getText() + '\n' + "文件未找到");e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();} finally {if (bw != null) {try {bw.close();} catch (IOException e1) {e1.printStackTrace();}}isChanged = false;labelLeft.setText("状态：已保存");this.setTitle(file.getName());}}}// 不打开文件保存对话框直接按照当前文件保存的方法public void onlySave() {BufferedWriter bw = null;try {OutputStreamWriter fWriter = new OutputStreamWriter(new FileOutputStream(file),encode);bw = new BufferedWriter(fWriter);String[] strs = ta.getText().split("\n");for (String str : strs) {bw.write(str);bw.newLine();bw.flush();}} catch (IOException e1) {e1.printStackTrace();} finally {if (bw != null) {try {bw.close();} catch (IOException e1) {e1.printStackTrace();}}isChanged = false;labelLeft.setText("状态：已保存");this.setTitle(file.getName());}}// 判断按钮是否可点击public void ifClick() {if (um.canUndo()) {undoItem.setEnabled(true);} else {undoItem.setEnabled(false);}if (um.canRedo()) {redoItem.setEnabled(true);} else {redoItem.setEnabled(false);}}// 全局按键事件监听public void addKeyListener() {Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {public void eventDispatched(AWTEvent event) {if (((KeyEvent) event).getID() == KeyEvent.KEY_RELEASED) {int key = ((KeyEvent) event).getKeyCode();// System.out.println(key);if (key == 17) {key_ctrl = false;}}if (((KeyEvent) event).getID() == KeyEvent.KEY_PRESSED) {int key = ((KeyEvent) event).getKeyCode();// System.out.println(key);if (key == 17) {key_ctrl = true;}if (key == 83 && key_ctrl == true) {System.out.println("ctrl+s");if (file == null) {openSaveDialog();} else {onlySave();}}if (key == 90 && key_ctrl == true) {System.out.println("ctrl+z");if (um.canUndo()) {// 撤销um.undo();}}if (key == 89 && key_ctrl == true) {System.out.println("ctrl+y");if (um.canRedo()) {// 恢复um.redo();}}}}}, AWTEvent.KEY_EVENT_MASK);}// 添加Bar各个组件的监听器public void addBarListener() {// 菜单栏焦点事件eJMenu.addMenuListener(new MenuListener() {@Overridepublic void menuCanceled(MenuEvent arg0) {menuSelected(arg0);}@Overridepublic void menuDeselected(MenuEvent arg0) {menuSelected(arg0);}@Overridepublic void menuSelected(MenuEvent arg0) {ifClick();}});// 关于NotePad触发监听器aboutItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {JOptionPane.showMessageDialog(TextEditBox.this, "在此有关于<网文专家>的详细介绍……", e.getActionCommand(),JOptionPane.INFORMATION_MESSAGE);}});// 编辑栏的撤销、恢复、剪切、复制、粘贴监听器undoItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {System.out.println((um.canUndo() ? "可" : "不可") + "撤销");if (um.canUndo()) {// 撤销um.undo();}ifClick();}});redoItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {System.out.println((um.canRedo() ? "可" : "不可") + "恢复");if (um.canRedo()) {// 恢复um.redo();}ifClick();}});cutItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {ta.cut();}});copyItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {ta.copy();}});pasteItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {ta.paste();}});//格式栏的编码和解码en_utf_8_Item.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {encode = "UTF-8";}});en_gbk_Item.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {encode = "GBK";}});de_utf_8_Item.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {System.out.println("utf-8");decode = "UTF-8";openagainDialog();}});de_gbk_Item.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {System.out.println("gbk");decode = "GBK";openagainDialog();}});// 打开按键（如果文件没修改直接调用读取文件的文件选择对话框，修改了的话弹出提示框提示是否保存再进一步操作）openItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {if (isChanged == false) {openOpenDialog();} else if (file == null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存", "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候调用保存文件的文件选择对话框,否的时候直接打开读取文件的文件选择对话框if (result == JOptionPane.YES_OPTION) {openSaveDialog();} else if (result == JOptionPane.NO_OPTION) {openOpenDialog();}} else if (file != null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存到" + file.getPath(), "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候直接保存,否的时候打开读取文件的文件选择对话框if (result == JOptionPane.YES_OPTION) {onlySave();} else if (result == JOptionPane.NO_OPTION) {openOpenDialog();}}}});// 另存为按键saveAsItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {openSaveDialog();}});// 保存按钮监听saveItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {if (file == null) {openSaveDialog();} else {onlySave();}}});// 关闭的控件closeItem.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {// 如果修改未保存弹出对话框，保存了则直接退出if (isChanged == false) {System.exit(0);} else if (file == null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存", "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候调用保存文件的文件选择对话框,否的时候直接退出if (result == JOptionPane.YES_OPTION) {openSaveDialog();} else if (result == JOptionPane.NO_OPTION) {System.exit(0);}} else if (file != null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存到" + file.getPath(), "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候直接保存,否的时候直接退出if (result == JOptionPane.YES_OPTION) {onlySave();} else if (result == JOptionPane.NO_OPTION) {System.exit(0);}}}});}// 窗口的监听器public void myaddWindowListener() {this.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {// 如果修改未保存弹出对话框，保存了则直接退出if (isChanged == false) {System.exit(0);} else if (file == null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存", "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候调用保存文件的文件选择对话框,否的时候直接退出if (result == JOptionPane.YES_OPTION) {openSaveDialog();} else if (result == JOptionPane.NO_OPTION) {System.exit(0);}} else if (file != null) {new JOptionPane();int result = JOptionPane.showConfirmDialog(TextEditBox.this, "文件还未保存，是否保存到" + file.getPath(), "提示",JOptionPane.YES_NO_CANCEL_OPTION);// 选择是的时候直接保存,否的时候直接退出if (result == JOptionPane.YES_OPTION) {onlySave();} else if (result == JOptionPane.NO_OPTION) {System.exit(0);}}}});}// 加载文件菜单public void launchBar() {bar = new JMenuBar();dJMenu = new JMenu("文本");eJMenu = new JMenu("编辑");cJMenu = new JMenu("格式");aJMenu = new JMenu("关于");openItem = new JMenuItem("打开");saveItem = new JMenuItem("保存(ctrl+s)");saveAsItem = new JMenuItem("另存为");closeItem = new JMenuItem("关闭");undoItem = new JMenuItem("撤销(ctrl+z)");redoItem = new JMenuItem("恢复(ctrl+y)");cutItem = new JMenuItem("剪切(ctrl+x)");copyItem = new JMenuItem("复制(ctrl+c)");pasteItem = new JMenuItem("粘贴(ctrl+v)");encodeItem = new JMenu("编码");decodeItem = new JMenu("解码");en_utf_8_Item = new JRadioButton("UTF-8",true);en_gbk_Item = new JRadioButton("GBK",false);de_utf_8_Item = new JRadioButton("UTF-8",true);de_gbk_Item = new JRadioButton("GBK",false);//按钮分组ButtonGroup group1 = new ButtonGroup(); ButtonGroup group2 = new ButtonGroup();group1.add(en_utf_8_Item);group1.add(en_gbk_Item);group2.add(de_utf_8_Item);group2.add(de_gbk_Item);aboutItem = new JMenuItem("关于网文专家");setJMenuBar(bar);bar.add(dJMenu);bar.add(eJMenu);bar.add(cJMenu);bar.add(aJMenu);dJMenu.add(openItem);dJMenu.add(saveItem);dJMenu.add(saveAsItem);dJMenu.add(closeItem);eJMenu.add(undoItem);eJMenu.add(redoItem);eJMenu.add(cutItem);eJMenu.add(copyItem);eJMenu.add(pasteItem);cJMenu.add(encodeItem);cJMenu.add(decodeItem);aJMenu.add(aboutItem);encodeItem.add(en_utf_8_Item);encodeItem.add(en_gbk_Item);decodeItem.add(de_utf_8_Item);decodeItem.add(de_gbk_Item);}// 加载文本域public void launchTextArea() {ta = new JTextArea();ta.setFont(f);// 自动换行ta.setLineWrap(true);// 文本编辑了则触发监听器设置isChanged变量为true// 监听状态改变ta.getDocument().addDocumentListener(new change());// 监听撤销ta.getDocument().addUndoableEditListener(new UndoableEditListener() {// 注册撤销可编辑监听器public void undoableEditHappened(UndoableEditEvent e) {um.addEdit(e.getEdit());}});// 编辑撤销的监听// 文本域滚动条scrollPane = new JScrollPane(ta);scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);sysWheel = scrollPane.getMouseWheelListeners()[0];// 得到系统滚动事件scrollPane.removeMouseWheelListener(sysWheel);// 移除系统滚动，需要时添加scrollPane.addMouseWheelListener(new event());add(scrollPane, BorderLayout.CENTER);}// 加载Label的板块public void launchLabel() {jDown = new JPanel(); // Label的板块labelLeft = new JLabel("修改状态：未修改");labelCenter = new JLabel("字体大小：" + f.getSize());labelRight = new JLabel("字数：" + tools.replaceBlank(ta.getText()));jDown.setLayout(new GridLayout(1, 5));jDown.add(labelLeft);jDown.add(labelCenter);jDown.add(labelRight);add(jDown, BorderLayout.SOUTH);}// 加载整个窗口public void launchFrame() {setBounds(20, 20, 1000, 800);setTitle("网文专家v1.1");setLayout(new BorderLayout());// 加载文件菜单this.launchBar();// 加载文本域this.launchTextArea();// 加载Label的板块this.launchLabel();// 按钮组件监听this.addBarListener();// 全局按键事件监听this.addKeyListener();// 窗口的监听器this.myaddWindowListener();setVisible(true);// 设置JFram不要默认关闭，为了用对话框触发退出setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);}
}

工具tools文件

tools.java

package main;public class tools {// 字符串去无效字符(空格，制表符，换行，标点等)后的长度.public static int replaceBlank(String str) {String dest = "";if (str != null) {str = str.replaceAll("[\\pP‘’“”]", "");dest = str.replaceAll("\\s*|\t|\r|\n", "");}return dest.length();}
}

实现难点1 ---- 如何实现快捷键ctrl+任意键位

在Java的swing图形界面中，键位识别都是单个的，没有直接可以使用的组合键，这个时候要实现组合键的功能可以利用按键按下状态（KeyEvent.KEY_RELEASED or KeyEvent.KEY_PRESSED）和一个boolean值，例如，当ctrl键按下，这时让bool为true，这时按下其他的按键就可以实现组合，一旦ctrl键释放，bool为false，组合键失效。（代码参照TextEditBox.java的285行，addKeyListener方法）

实现难点2 ---- 如何实现有效字数的统计

ta.getDocument().addDocumentListener(new change());
用上面的方法给输入文本框绑定自己的DocuListener事件，方法的参数是106行的第二个内部类，它实现了DocumentListener接口，重写了change方法，每次用户输入都统计一次有效字数。
这里的有效字数是调用tools.java中的replaceBlank方法，利用正则匹配消除掉字符串中的无效字符(空格，制表符，换行，标点等)。

实现难点3 ---- 如何实现ctrl+鼠标滚轮控制字体大小

自定义自己的鼠标滚轮事件，并替换掉系统的鼠标滚轮事件。参照TextEditBox.java代码602到608行。这里的自定义鼠标事件是第一个内部类的实例，在84行的第一个内部类继承了MouseAdapter，重写了mouseWheelMoved事件。

和windows自带编辑器的对比

1. 在打开一个大文本的速度上两者相差无几。
2. 基本功能都可以复原windows自带的编辑器，除了一些查找替换的功能还没有实现（利用正则应该不难实现，可以拓展）。
3. windows自带编辑器似乎没有修改编码格式的功能。没有统计有效字数的功能。

总的来说和windows编辑器相差不多，并且代码可以再做优化拓展。

如代码实现有误，或者有更好的实现方法，请在评论区留言。