Java编写的文本编辑器

界面：

代码（编译后可直接运行）：

//简单的类似记事本的文档编辑器

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import java.io.*;

import java.awt.font.*;

import javax.swing.undo.UndoManager;

public class MyTxt

{

public static void main(String[] args)

{

Aframe frame = new Aframe();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.show();

}

}

class Aframe extends JFrame

{

public Aframe()

setTitle("我的记事本");

setSize(WIDTH, HEIGHT);

Container contentPane = getContentPane();

JPanel txtPanel = new JPanel();

JPanel comboxPanel = new JPanel();

JPanel textPanel = new JPanel();

txtArea=new JTextArea("",17,40);

JScrollPane scrollPane =new JScrollPane(txtArea);

txtPanel.add(scrollPane);

contentPane.add(comboxPanel,BorderLayout.NORTH);

contentPane.add(txtPanel);

contentPane.add(textPanel,BorderLayout.SOUTH);

//Caidan lan:添加主菜单并设置快捷键

JMenuBar menuBar =new JMenuBar();

setJMenuBar(menuBar);

fileMenu=new JMenu("文件(F)");

editMenu=new JMenu("编辑(E)");

typeMenu=new JMenu("格式(O)");

viewMenu=new JMenu("查看(V)");

helpMenu=new JMenu("帮助(H)");

aboutMenu=new JMenu("关于(A)");

fileMenu.setMnemonic('F');

editMenu.setMnemonic('E');

typeMenu.setMnemonic('O');

viewMenu.setMnemonic('V');

helpMenu.setMnemonic('H');

aboutMenu.setMnemonic('A');

menuBar.add(fileMenu);

menuBar.add(editMenu);

menuBar.add(typeMenu);

menuBar.add(viewMenu);

menuBar.add(aboutMenu);

menuBar.add(helpMenu);

//wenjian“文件”菜单的子菜单添加以及设置加速器，监听器

aa=fileMenu.add(new ShowAction("新建"));

aa.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK ));

ab=fileMenu.add(new ShowAction("打开"));

ab.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MAS K));

ac=fileMenu.add(new ShowAction("保存"));

ac.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK ));

ad=fileMenu.add(new ShowAction("另存为"));

ad.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK ));

fileMenu.addSeparator();

ae=fileMenu.add(new ShowAction("页面设置"));

ae.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_U,InputEvent.CTRL_MASK ));

af=fileMenu.add(new ShowAction("打印"));

af.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.CTRL_MASK) );

fileMenu.addSeparator();//分割线

ag=fileMenu.add(new ShowAction("退出"));

ag.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK ));

//bianji“编辑”菜单的子菜单添加以及设置加速器，监听器

ah=editMenu.add(new ShowAction("撤消"));

editMenu.addSeparator();

ah.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,InputEvent.CTRL_MASK) );

ai=editMenu.add(new ShowAction("剪切"));

ai.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK) );

aj=editMenu.add(new ShowAction("复制"));

aj.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK) );

an=editMenu.add(new ShowAction("粘贴"));

an.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK ));

ak=editMenu.add(new ShowAction("删除"));

ak.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,InputEvent.CTRL_MASK) );

editMenu.addSeparator();

al=editMenu.add(new ShowAction("查找"));

al.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK)) ;

am=editMenu.add(new ShowAction("全选"));

am.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MAS K));

//geshi“格式”菜单的子菜单添加以及设置加速器，监听器

zdhh=new JMenu("自动换行(L)");

zdhh.setMnemonic('L');

typeMenu.add(zdhh);

ButtonGroup group =new ButtonGroup();

xz=new JRadioButtonMenuItem("选择");

xz.addActionListener(new ShowAction("选择"));

xz.setSelected(true);

qxxz=new JRadioButtonMenuItem("取消");

qxxz.addActionListener(new ShowAction("取消"));

qxxz.setSelected(true);

group.add(xz);group.add(qxxz);

zdhh.add(xz);zdhh.add(qxxz);

bj=typeMenu.add(new ShowAction("背景颜色"));

bj.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK) );

zt=typeMenu.add(new ShowAction("字体"));

zt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK)) ;

//字体弹出框中的“确定”按钮

que=new Button("确定");

que.addActionListener(new boxlistener());

//chakan“查看”菜单的子菜单添加以及设置加速器，监听器

ztl=viewMenu.add(new ShowAction("状态栏"));

ztl.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK) );

//guanyu“关于”菜单的子菜单添加以及设置加速器，监听器

zzxx=aboutMenu.add(new ShowAction("作者信息"));

zzxx.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MAS K));

bq=aboutMenu.add(new ShowAction(""));

bq.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B,InputEvent.CTRL_MASK ));

sm=aboutMenu.add(new ShowAction("声明"));

sm.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK ));

//bangzhu“帮助”菜单的子菜单添加以及设置加速器，监听器

shm=helpMenu.add(new ShowAction("说明"));

shm.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MAS K));

//文本框底部工具栏的设置

toolbar2=new JToolBar();

textPanel.add(toolbar2);

text1=new JTextField("就绪",10);

text2=new JTextField("欢迎使用该记事本！",10);

text3=new JTextField("",10);

text4=new JTextField("",10);

textPanel.setLayout(new GridLayout(1, 4));

toolbar2.add(text1);

toolbar2.add(text2);

toolbar2.add(text3);

toolbar2.add(text4);

text1.setEditable(false);

text2.setEditable(false);

text3.setEditable(false);

text4.setEditable(false);

//组合框的设置

//字体

zitiLabel=new JLabel("字体");comboxPanel.add(zitiLabel);

String zit[]={"宋体","华文行楷","楷体","黑体","幼圆"};

zitibox=new JComboBox(zit);

comboxPanel.add(zitibox);

//颜色

yanseLabel=new JLabel("颜色");comboxPanel.add(yanseLabel);

String yans[]={"黑色","蓝色","绿色","红色","黄色","蓝绿色","浅灰色"};

yansebox=new JComboBox(yans);

comboxPanel.add(yansebox);

//大小

daxiaoLabel=new JLabel("大小");comboxPanel.add(daxiaoLabel);

String dax[]={"15","10","5","20","25","30","35","40","..."};

daxiaobox=new JComboBox(dax);

comboxPanel.add(daxiaobox);

zitibox.setEditable(true);

yansebox.setEditable(true);

daxiaobox.setEditable(true);

comboxPanel.setLayout(new FlowLayout(FlowLayout.LEFT));//靠左排列

//组合框注册监听器

yansebox.addActionListener(new boxlistener());

zitibox.addActionListener(new boxlistener());

daxiaobox.addActionListener(new boxlistener());

txtPanel.setLayout(new GridLayout(1, 1));

//实例化“撤销”

um= new UndoManager ();

txtArea.getDocument().addUndoableEditListener(um);

}

//菜单栏的接口实现

private class ShowAction extends AbstractAction

{

public ShowAction(String name){super(name);}

public void actionPerformed(ActionEvent e)

{

Object s=e.getSource();

//新建

if(s==aa)

{

if(txtArea.getText().equals(""))

{

txtArea.setText("");

}

else{

int n=JOptionPane.showConfirmDialog(Aframe.this, "无标题记事本已改变。\n想要保存吗？","记事本",JOptionPane.YES_NO_CANCEL_OPTION);

if(n==JOptionPane.NO_OPTION){

txtArea.setText("");

setTitle("无标题"+"——"+"记事本");

}

else if(n==JOptionPane.YES_OPTION)

{

save.setVisible(true);

String name=save.getDirectory()+save.getFile();

try

{

FileOutputStream out=new FileOutputStream(name);

out.write(txtArea.getText().getBytes());

out.close();

}

catch(IOException a)

{

System.err.println("保存失败。。！");

}

}

}

}

//打开

if(s==ab)

{

open.setVisible(true);

String name=open.getDirectory()+open.getFile();

String name2=open.getFile();

setTitle(name2);

try

{

FileInputStream in=new FileInputStream(name);

byte[] ia=new byte[in.available()];

in.read(ia);

txtArea.setText(new String(ia));

in.close();

}

catch(IOException a)

{

System.err.println("获取文件失败！");

}

}

//另存为

if(s==ad)

{

save.setVisible(true);

String name=save.getDirectory()+save.getFile();

try

{

FileOutputStream out=new FileOutputStream(name);

out.write(txtArea.getText().getBytes());

out.close();

}

catch(IOException a)

{

System.err.println("保存失败。。！");

}

shifulingcun=1;

}

//保存

if(s==ac)

{

if(shifulingcun!=1)

{save.setVisible(true);}

String name=save.getDirectory()+save.getFile();

try

{

FileOutputStream out=new FileOutputStream(name); out.write(txtArea.getText().getBytes());

out.close();

}

catch(IOException b)

{

System.err.println("保存文件失败");

}

}

//退出

if(s==ag)

{

int selection = JOptionPane.showConfirmDialog( Aframe.this,

"确定退出么?", "退出?",

JOptionPane.OK_CANCEL_OPTION, JOptionPane.WARNING_MESSAGE);

if (selection == JOptionPane.OK_OPTION)

{

System.exit(0);

}

}

//选择自动换行

if(s==xz)

{

txtArea.setLineWrap(true);

}

//取消自动换行

if(s==qxxz)

{

txtArea.setLineWrap(false);

}

//背景颜色

if(s==bj)

{

Color color=JColorChooser.showDialog(Aframe.this, "调色板", txtArea.getBackground());

if(color!=null)

txtArea.setBackground(color);

}

//作者信息

if (s==zzxx)

{int selection = JOptionPane.showConfirmDialog(

Aframe.this,

"“我的记事本”编写小组成员：悦，王征，光辉","作者信息",

JOptionPane.DEFAULT_OPTION);

}

//

if (s==bq)

{int selection = JOptionPane.showConfirmDialog(

Aframe.this,

"所有，盗版必究！","",

JOptionPane.DEFAULT_OPTION);

}

//声明

if (s==sm)

{int selection = JOptionPane.showConfirmDialog(

Aframe.this,

"该程序仅用于实践交流","声明",

JOptionPane.DEFAULT_OPTION);

}

//说明

if (s==shm)

{int selection = JOptionPane.showConfirmDialog(

Aframe.this,

"由于种种原因，该版本记事本还存在很多缺陷，我们将在以后的工作中予以改进","说明",

JOptionPane.DEFAULT_OPTION);

}

//剪切复制粘贴

if (s==ai|| s==cutTtem)

{

txtArea.cut();

}

if (s==aj)

{

txtArea.copy();

}

if (s==an)

{

txtArea.paste();

}

//删除

if(s==ak)

{

txtArea.replaceRange("", txtArea.getSelectionStart(), txtArea.getSelectionEnd());

}

//全选

if (s==am)

{

txtArea.selectAll();

}

//撤销

if(s==ah)

{

um.undo();

}

//字体

if (s==zt)

{

tishi.setFont(new Font("华文行楷",1,15));

tanchu.setLocation(300,250);

tanchu.setSize(200,150);

tanchu.setTitle("字体设置");

tanchu.setLayout(new GridLayout(2,2,2,2));

tanchu.add(tishi);

tanchu.add(daxiaobox);

tanchu.add(que);

tanchu.add(zitibox);

tanchu.setVisible(true);

}

//状态栏

aaaaa.setText("当前字体是"+ff+"颜色是"+zzz+"大小是"+kk);

if (s==ztl)

{

tanchu.setLocation(300,250);

tanchu.setSize(300,150);

tanchu.setTitle("当前状态");

tanchu.setLayout(new GridLayout(2,2,2,2));

aaaaa.setEditable(false);

tanchu.add(aaaaa);

tanchu.add(que);

tanchu.setVisible(true);

}

//查找

}

}

//组合框的接口实现

private class boxlistener implements ActionListener {

public void actionPerformed(ActionEvent ee)

{

Object ss=yansebox.getSelectedItem();

Object zz=zitibox.getSelectedItem();

Object dx=daxiaobox.getSelectedItem();

String tr=(String)ss;

String tz=(String)zz;

String td=(String)dx;

//字体菜单中弹出菜单“确定”的响应

if (ee.getSource()==que){

tanchu.dispose();

}

//颜色

if(tr=="红色"){

txtArea.setForeground(Color.red);

zzz="红色";

}

if(tr=="黑色"){

txtArea.setForeground(Color.black);

zzz="黑色";

}

if(tr=="绿色"){

txtArea.setForeground(Color.green);

zzz="绿色";

}

if(tr=="蓝色"){

txtArea.setForeground(Color.blue);

zzz="蓝色";

}

if(tr=="黄色"){

txtArea.setForeground(Color.yellow);

zzz="黄色";

}

if(tr=="蓝绿色"){

txtArea.setForeground(Color.cyan);

zzz="蓝绿色";

}

if(tr=="浅灰色"){

txtArea.setForeground(Color.lightGray);

zzz="浅灰色";

}

//字体

if(tz=="华文行楷"){

Font f=txtArea.getFont();

txtArea.setFont(new Font("华文行楷",f.getStyle(),f.getSize())); ff="华文行楷";

}

if(tz=="楷体"){

Font f=txtArea.getFont();

txtArea.setFont(new Font("楷体",f.getStyle(),f.getSize()));

ff="楷体";

}

if(tz=="宋体"){

Font f=txtArea.getFont();

txtArea.setFont(new Font("宋体",f.getStyle(),f.getSize()));

ff="宋体";

}

if(tz=="黑体"){

Font f=txtArea.getFont();

txtArea.setFont(new Font("黑体",f.getStyle(),f.getSize()));

ff="黑体";

}

if(tz=="幼圆"){

Font f=txtArea.getFont();

txtArea.setFont(new Font("幼圆",f.getStyle(),f.getSize()));

ff="幼圆";

}

//大小

if(td=="5"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),5));

kk="5";

}

if(td=="10"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),10));

kk="10";

}

if(td=="15"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),15));

kk="15";

}

if(td=="20"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),20));

kk="20";

}

if(td=="25"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),25));

kk="25";

}

if(td=="30"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),30));

kk="30";

}

if(td=="35"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),35));

kk="35";

}

if(td=="40"){

Font f=txtArea.getFont();

txtArea.setFont(new Font(f.getName(),f.getStyle(),40));

kk="40";

}

}

}

public static final int WIDTH = 550;

public static final int HEIGHT = 450;

JTextArea txtArea;

JMenu fileMenu,editMenu,typeMenu,viewMenu,helpMenu,aboutMenu; JMenuItem

aa,ab,ac,ad,ae,af,ag,ah,ai,aj,ak,al,am,an,zdhh,zt,ztl,zzxx,bq,sm,shm,bj,cutTtem; JComboBox zitibox,yansebox,daxiaobox;

JLabel zitiLabel,yanseLabel,daxiaoLabel;

FileDialog open=new FileDialog(this,"打开..");

FileDialog save=new FileDialog(this,"另存为..",FileDialog.SAVE); JRadioButtonMenuItem xz,qxxz;

JFileChooser fileChooser;

int shifulingcun;

JToolBar toolbar2;

JTextField text1,text2,text3,text4;

public JTextField aaaaa=new JTextField ("");

UndoManager um;

Dialog tanchu=new Dialog(this);

public Button que;

Label tishi=new Label("字体和大小:");

String ff="",kk="",zzz="";

}

界面：