Java仿Windows记事本源代码分享

import java.awt.*;

import javax.swing.*;

import javax.swing.filechooser.filenameextensionfilter;

import javax.swing.undo.undomanager;

import java.awt.event.*;

import java.io.*;

/**

  *

  * @author cjbi@outlook测试数据

  * @created 2015年7月6日 上午11:22:24

  */

public class jnotepad extends jframe implements actionlistener {

  jmenubar menubar = new jmenubar();

  jmenu file = new jmenu( "文件(f)" );

  jmenu edit = new jmenu( "编辑(e)" );

  jmenu format = new jmenu( "格式(o)" );

  jmenu help = new jmenu( "帮助(h)" );

  jmenuitem create = new jmenuitem( "新建" );

  jmenuitem open = new jmenuitem( "打开..." );

  jmenuitem save = new jmenuitem( "保存" );

  jmenuitem saveas = new jmenuitem( "另存为..." );

  jmenuitem exit = new jmenuitem( "退出" );

  jmenuitem undo = new jmenuitem( "撤销" );

  jmenuitem cut = new jmenuitem( "剪切" );

  jmenuitem copy = new jmenuitem( "复制" );

  jmenuitem paste = new jmenuitem( "粘贴" );

  jmenuitem findrep = new jmenuitem( "查找替换" );

  jmenuitem selectall = new jmenuitem( "全选" );

  jmenuitem font = new jmenuitem( "字体" );

  jmenuitem about = new jmenuitem( "关于" );

  jmenuitem cut2 = new jmenuitem( "剪切(x)" );

  jmenuitem copy2 = new jmenuitem( "复制(c)" );

  jmenuitem paste2 = new jmenuitem( "粘贴(v)" );

  jmenuitem selectall2 = new jmenuitem( "全选(a)" );

  public static jtextarea textarea = new jtextarea();

  undomanager um = new undomanager();

  jscrollpane scroll = new jscrollpane(textarea, scrollpaneconstants.vertical_scrollbar_always, scrollpaneconstants.horizontal_scrollbar_as_needed);

  jpopupmenu popup = new jpopupmenu();

  string pathselect;

  // 获取屏幕尺寸

  dimension screensize = toolkit.getdefaulttoolkit().getscreensize();

  public jnotepad() {

   // 此处定义键盘快捷键

   // menubar

   file.setmnemonic(keyevent.vk_f);

   edit.setmnemonic(keyevent.vk_e);

   format.setmnemonic(keyevent.vk_o);

   help.setmnemonic(keyevent.vk_h);

   // menuitem

   create.setaccelerator(keystroke.getkeystroke(keyevent.vk_n, actionevent.ctrl_mask));

   open.setaccelerator(keystroke.getkeystroke(keyevent.vk_o, actionevent.ctrl_mask));

   save.setaccelerator(keystroke.getkeystroke(keyevent.vk_s, actionevent.ctrl_mask));

   undo.setaccelerator(keystroke.getkeystroke(keyevent.vk_z, actionevent.ctrl_mask));

   cut.setaccelerator(keystroke.getkeystroke(keyevent.vk_x, actionevent.ctrl_mask));

   copy.setaccelerator(keystroke.getkeystroke(keyevent.vk_c, actionevent.ctrl_mask));

   paste.setaccelerator(keystroke.getkeystroke(keyevent.vk_v, actionevent.ctrl_mask));

   findrep.setaccelerator(keystroke.getkeystroke(keyevent.vk_f, actionevent.ctrl_mask));

   selectall.setaccelerator(keystroke.getkeystroke(keyevent.vk_a, actionevent.ctrl_mask));

   // 事件监听者

   save.addactionlistener( this );

   create.addactionlistener( this );

   open.addactionlistener( this );

   saveas.addactionlistener( this );

   exit.addactionlistener( this );

   undo.addactionlistener( this );

   cut.addactionlistener( this );

   copy.addactionlistener( this );

   paste.addactionlistener( this );

   selectall.addactionlistener( this );

   font.addactionlistener( this );

   about.addactionlistener( this );

   cut2.addactionlistener( this );

   copy2.addactionlistener( this );

   paste2.addactionlistener( this );

   selectall2.addactionlistener( this );

   findrep.addactionlistener( this );

   // 设置撤销文本的管理器

   textarea.getdocument().addundoableeditlistener(um);

   textarea.setfont(format.font);

   // 文件

   file.add(create);

   file.add(open);

   file.add(save);

   file.add(saveas);

   file.addseparator();

   file.add(exit);

   // 编辑

   edit.add(undo);

   edit.addseparator();

   edit.add(cut);

   edit.add(copy);

   edit.add(paste);

   edit.addseparator();

   edit.add(findrep);

   edit.addseparator();

   edit.add(selectall);

   // 格式

   format.add(font);

   // 帮助

   help.add(about);

   // 菜单栏

   menubar.add(file);

   menubar.add(edit);

   menubar.add(format);

   menubar.add(help);

   // 右键菜单

   popup.add(cut2);

   popup.add(copy2);

   popup.add(paste2);

   popup.addseparator();

   popup.add(selectall2);

   // 添加到文本域容器

   textarea.add(popup);

   // 匿名内部类监听器右键动作

   textarea.addmouselistener( new mouseadapter() {

    public void mousereleased(mouseevent e) {

     if (e.getbutton() == mouseevent.button3) {

      popup.show(textarea, e.getx(), e.gety());

     }

    }

   });

   // 边界布局

   this .add(menubar, borderlayout.north);

   this .add(scroll, borderlayout.center);

   this .settitle( "记事本" );

   this .setsize( 500 , 400 );

   this .setlocationrelativeto( null );

   this .seticonimage( new imageicon( this .getclass().getresource( "/icon/notepad.png" )).getimage()); //图标放在源目录的icon文件夹

   this .setdefaultcloseoperation(jframe.dispose_on_close);

   this .setvisible( true );

  }

  // 重写actionperformed

  @override

  public void actionperformed(actionevent e) {

   // event对象发生源

   if (e.getsource() == open) {

    jfilechooser chooser = new jfilechooser();

    filenameextensionfilter filter = new filenameextensionfilter( "文本文档(*.txt)" , "txt" );

    chooser.setfilefilter(filter);

    chooser.setdialogtitle( "文件打开" );

    chooser.showopendialog( null );

    chooser.setvisible( true );

    try {

     pathselect = chooser.getselectedfile().getpath();

     filereader wjl = new filereader(pathselect);

     bufferedreader hcl = new bufferedreader(wjl);

     string s = "" , zfc = "" ;

     while ((s = hcl.readline()) != null ) {

      zfc += (s + "\n" );

     }

     textarea.settext(zfc);

    } catch (exception e1) {

    }

   }

   if (e.getsource() == saveas) { // 另存为

    jfilechooser chooser = new jfilechooser();

    filenameextensionfilter filter = new filenameextensionfilter( "文本文档(*.txt)" , "txt" );

    chooser.setfilefilter(filter);

    chooser.setdialogtitle( "另存为" );

    chooser.showsavedialog( null );

    chooser.setvisible( true );

    printstream ps;

    try {

     string select = chooser.getselectedfile().getpath();

     ps = new printstream(select);

     system.setout(ps);

     system.out.println( this .textarea.gettext());

    } catch (exception e1) {

    }

   }

   if (e.getsource() == save && (pathselect == null )) { // 保存

    jfilechooser chooser = new jfilechooser();

    chooser.setdialogtitle( "保存" );

    chooser.showsavedialog( null );

    chooser.setvisible( true );

    printstream ps;

    try {

     pathselect = chooser.getselectedfile().getpath();

     ps = new printstream(pathselect);

     system.setout(ps);

     system.out.println( this .textarea.gettext());

    } catch (exception e1) {

    }

   } else if (e.getsource() == save && !(pathselect == null )) {

    printstream ps;

    try {

     ps = new printstream(pathselect);

     system.setout(ps);

     system.out.println( this .textarea.gettext());

    } catch (filenotfoundexception e1) {

    }

   }

   if (e.getsource() == create) {

    textarea.settext( "" );

    pathselect = null ;

   }

   if (e.getsource() == exit) {

    system.exit( 0 );

   }

   if (e.getsource() == undo) {

    if (um.canundo()) {

     um.undo();

    }

   }

   if (e.getsource() == cut || e.getsource() == cut2) {

    textarea.cut();

   } else if (e.getsource() == copy || e.getsource() == copy2) {

    textarea.copy();

   } else if (e.getsource() == paste || e.getsource() == paste2) {

    textarea.paste();

   } else if (e.getsource() == findrep) {

    new findandreplace(textarea);

   }

   else if (e.getsource() == selectall || e.getsource() == selectall2) {

    textarea.selectall();

   }

   if (e.getsource() == font) {

    new format(textarea);

   }

   if (e.getsource() == about) {

    new about();

   }

  }

  public static void main(string[] args) {

   new jnotepad();

  }

}

class findandreplace extends jdialog implements actionlistener { // 查找和替换

  jlabel findlabel = new jlabel( "查找内容：" );

  jlabel replabel = new jlabel( " 替换为：" );

  jtextfield findtf = new jtextfield( 8 );

  jtextfield reptf = new jtextfield( 8 );

  jbutton findbtn = new jbutton( "查找" );

  jbutton repbtn = new jbutton( "替换" );

  jpanel findpn = new jpanel();

  jpanel reppn = new jpanel();

  jtextarea textarea;

  string text;

  boolean flg = false ;

  int len;

  int start = 0 ;

  int k = 0 ;

  public findandreplace(jtextarea textarea) {

   this .textarea = textarea;

   findpn.add(findlabel);

   findpn.add(findtf);

   findpn.add(findbtn);

   reppn.add(replabel);

   reppn.add(reptf);

   reppn.add(repbtn);

   this .add(findpn);

   this .add(reppn);

   findbtn.addactionlistener( this );

   repbtn.addactionlistener( this );

   this .settitle( "查找和替换" );

   this .setlayout( new gridlayout( 2 , 1 ));

   // this.setbounds(400, 200, 300, 140);

   this .pack();

   this .setlocationrelativeto( null );

   this .setresizable( false );

   this .setvisible( true );

   this .setdefaultcloseoperation(jdialog.dispose_on_close);

  }

  @suppresswarnings ( "deprecation" )

  public void actionperformed(actionevent e) {

   string findtext = findtf.gettext();

   string reptext = reptf.gettext();

   text = textarea.gettext();

   if (e.getsource() == findbtn) {

    findbtn.setlabel( "下一个" );

    if (findtext != null ) {

     len = findtext.length();

     start = text.indexof(findtext, k);

     k = start + len;

     textarea.select(start, start + len);

     flg = true ;

     if (start == - 1 ) {

      joptionpane.showmessagedialog( null , "已到文件尾部！" , "提示" , joptionpane.information_message);

      start = 0 ;

      k = 0 ;

      flg = false ;

     }

    }

   } else if (e.getsource() == repbtn) {

    if (flg) {

     textarea.replacerange(reptext, start, start + len);

     flg = false ;

    }

   }

  }

}

// 字体格式

class format extends jdialog implements actionlistener {

  public static int style = 0 ; // 全局变量类型，默认值为0

  public static int size = 16 ; // 全局变量字体大小，默认值为16

  public static font font = new font( "新宋体" , style, size); // 全局变量字体，默认值为新宋体

  jpanel pn = new jpanel();

  jpanel okcelpn = new jpanel();

  jpanel fontpn = new jpanel();

  jpanel ptpn = new jpanel();

  jlabel fontlabel = new jlabel( "字体: " );

  jlabel fontstylelabel = new jlabel( " 字形: " );

  jlabel ptlabel = new jlabel( "  磅值: " );

  jbutton ok = new jbutton( "确定" );

  jbutton cancel = new jbutton( "取消" );

  graphicsenvironment e = graphicsenvironment.getlocalgraphicsenvironment(); // 获取系统中可用的字体的名字

  string[] fontname = e.getavailablefontfamilynames(); // 获取系统中可用的字体的名字

  string[] fonttype = { "常规" , "倾斜" , "粗体" , "粗偏斜体" };

  jlist fontlist = new jlist(fontname);

  jlist fonttypelist = new jlist(fonttype);

  jscrollpane fontscroll = new jscrollpane(fontlist);

  jscrollpane fonttypescroll = new jscrollpane(fonttypelist);

  jtextarea textarea;

  spinnermodel spinnermodel = new spinnernumbermodel(size, // initial value

    0 , // min

    100 , // max

    2 // step

  );

  jspinner spinner = new jspinner(spinnermodel);

  public format(jtextarea textarea) {

   this .textarea = textarea;

   ok.addactionlistener( this );

   cancel.addactionlistener( this );

   pn.setlayout( new gridlayout( 2 , 1 ));

   pn.add(fontpn);

   pn.add(ptpn);

   fontpn.add(fontlabel);

   fontpn.add(fontscroll);

   fontpn.add(fontstylelabel);

   fontpn.add(fonttypescroll);

   ptpn.add(ptlabel);

   ptpn.add(spinner);

   fontlist.setvisiblerowcount( 5 );

   fontlist.setfixedcellwidth( 60 );

   fontlist.setselectedindex( 50 );

   fontlist.setselectedvalue(font.getfontname(), true );

   fonttypelist.setvisiblerowcount( 5 );

   fonttypelist.setselectedindex(style);

   okcelpn.add(ok);

   okcelpn.add(cancel);

   okcelpn.setlayout( new flowlayout(flowlayout.right));

   this .add(pn, borderlayout.center);

   this .add(okcelpn, borderlayout.south);

   this .settitle( "字体" );

   this .pack();

   this .setlocationrelativeto( null );

   this .setresizable( false );

   this .setvisible( true );

   this .setdefaultcloseoperation(jframe.dispose_on_close);

  }

  public void actionperformed(actionevent e) {

   if (e.getsource() == ok) {

    system.out.println(fontlist.getselectedvalue());

    style = this .type();

    size = integer.parseint(spinner.getvalue().tostring());

    font = new font((string) fontlist.getselectedvalue(), style, size);

    textarea.setfont(font);

    this .dispose();

    system.out.println(type());

   } else if (e.getsource() == cancel) {

    this .dispose();

   }

  }

  private int type() {

   if (fonttypelist.getselectedvalue().equals( "倾斜" )) {

    return 1 ;

   } else if (fonttypelist.getselectedvalue().equals( "粗体" )) {

    return 2 ;

   } else if (fonttypelist.getselectedvalue().equals( "粗偏斜体" )) {

    return 3 ;

   } else

    return 0 ;

  }

}

class about extends jdialog { // 关于窗口

  about() {

   joptionpane.showmessagedialog( null , " 作者：cjb 版本：v1.5\n\n 联系：cjbi@outlook测试数据" , "关于" ,

     joptionpane.plain_message);

  }

}