基于java的记事本

喜欢ヅ旅行 2023-09-28 09:34 104阅读 0赞

package jsb;
    
    import java.awt.BorderLayout;
    import java.awt.Desktop;
    import java.awt.Dimension;
    import java.awt.FlowLayout;
    import java.awt.Font;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.io.BufferedWriter;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.OutputStreamWriter;
    import java.net.URI;
    import java.net.URISyntaxException;
    import java.net.URL;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    
    import javax.swing.ImageIcon;
    import javax.swing.JCheckBoxMenuItem;
    import javax.swing.JFileChooser;
    import javax.swing.JFrame;
    import javax.swing.JMenu;
    import javax.swing.JMenuBar;
    import javax.swing.JMenuItem;
    import javax.swing.JOptionPane;
    import javax.swing.JScrollPane;
    import javax.swing.JTextArea;
    import javax.swing.UIManager;
    import javax.swing.UnsupportedLookAndFeelException;
    
    public class jsb extends JFrame implements ActionListener {
    	JMenuBar menubar;
    	JMenu file,edit,format,watch,help;
    	JMenuItem create,open,save,saveto,set,print,exit;
    	JMenuItem cx,cut,copy,paste,delete,cz,th,zd,qx,rq;
    	JMenuItem font,ztl,ckbz,gy;
    	JCheckBoxMenuItem zdhh;
    	JTextArea panel;
    	JScrollPane jsp;
    	private static String name;
    	JFileChooser filechooser;
    	public jsb(){
    		super("新建文本文档.txt"+"- 记事本");
    		menubar=new JMenuBar();
    		filechooser=new JFileChooser();
    		file=new JMenu("文件(F)");
    		edit=new JMenu("编辑(E)");
    		format=new JMenu("格式(O)");
    		watch=new JMenu("查看(V)");
    		help=new JMenu("帮助(H)");
    		create=new JMenuItem("新建");
    		open=new JMenuItem("打开");
    		save=new JMenuItem("保存");
    		saveto=new JMenuItem("另存为");
    		set=new JMenuItem("页面设置");
    		print=new JMenuItem("打印");
    		exit=new JMenuItem("退出");
    		cx=new JMenuItem("撤销");cut=new JMenuItem("剪切");copy=new JMenuItem("拷贝");paste=new JMenuItem("粘贴");
    		delete=new JMenuItem("删除");cz=new JMenuItem("查找");th=new JMenuItem("替换");zd=new JMenuItem("转到");
    		qx=new JMenuItem("全选");rq=new JMenuItem("日期/时间");
    		zdhh=new JCheckBoxMenuItem("自动换行");font=new JMenuItem("字体");ztl=new JMenuItem("状态栏");ckbz=new JMenuItem("查看帮助");gy=new JMenuItem("关于记事本");
    		menubar.add(file);menubar.add(edit);menubar.add(format);menubar.add(watch);menubar.add(help);
    		try {
    			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    		} catch (ClassNotFoundException e1) {
    			// TODO Auto-generated catch block
    			e1.printStackTrace();
    		} catch (InstantiationException e1) {
    			// TODO Auto-generated catch block
    			e1.printStackTrace();
    		} catch (IllegalAccessException e1) {
    			// TODO Auto-generated catch block
    			e1.printStackTrace();
    		} catch (UnsupportedLookAndFeelException e1) {
    			// TODO Auto-generated catch block
    			e1.printStackTrace();
    		}
    		file.add(create);file.add(open);file.add(save);file.add(saveto);file.addSeparator();file.add(set);file.add(print);file.addSeparator();file.add(exit);
    		edit.add(cx);edit.addSeparator();edit.add(cut);edit.add(copy);edit.add(paste);edit.add(delete);
    		edit.addSeparator();edit.add(cz);edit.add(th);edit.add(zd);edit.addSeparator();edit.add(qx);edit.add(rq);
    		cx.setEnabled(false);cut.setEnabled(false);copy.setEnabled(false);paste.setEnabled(false);delete.setEnabled(false);cz.setEnabled(false);th.setEnabled(false);
    		zd.setEnabled(false);qx.setEnabled(false);
    		format.add(zdhh);format.add(font);
    		watch.add(ztl);help.add(ckbz);help.addSeparator();help.add(gy);
    		create.addActionListener(this);open.addActionListener(this);save.addActionListener(this);
    		saveto.addActionListener(this);set.addActionListener(this);exit.addActionListener(this);gy.addActionListener(this);help.addActionListener(this);
    		zdhh.addActionListener(this);font.addActionListener(this);rq.addActionListener(this);
    		print.setEnabled(false);
    		this.setJMenuBar(menubar);
    		panel=new JTextArea();
    		//panel.setLayout(new FlowLayout());
    		jsp=new JScrollPane(panel);
    		jsp.setPreferredSize(new Dimension(780,550));
    		this.add(jsp,BorderLayout.CENTER);
    		//this.add(panel);
    		this.setBounds(600, 300, 600, 400);
    		this.setVisible(true);
    		this.setIconImage(new ImageIcon("src\\1.ico").getImage());
    		this.addWindowListener(new WindowAdapter() {
    			@Override
    			public void windowClosing(WindowEvent e) {
    				System.exit(0);
    			}
    		});
    		
    	}
    	public static void main(String[] args) {
    		jsb note=new jsb();
    	}
    	@Override
    	public void actionPerformed(ActionEvent e) {
    		if(e.getSource()==create){
    			createFile();
    		}
    		if(e.getSource()==exit){
    			System.exit(0);
    		}
    		if(e.getSource()==open){
    			filechooser.showOpenDialog(this);
    			panel.setText(openFile());
    		}
    		if(e.getSource()==save||e.getSource()==saveto){
    			filechooser.showSaveDialog(this);
    			File file=filechooser.getSelectedFile();
    			saveFile(file);
    		}
    		if(e.getSource()==set){
    			String s=JOptionPane.showInputDialog(this,"请输入宽、高：","默认：600 400");
    			String[] str=new String[2];
    			str=s.split(" ");
    			int wigth=Integer.parseInt(str[0]);
    			int height=Integer.parseInt(str[1]);
    			this.setSize(wigth, height);
    		}
    		if(e.getSource()==copy){
    			panel.copy();
    		}
    		if(e.getSource()==cut){
    			panel.cut();
    		}
    		if(e.getSource()==paste){
    			panel.paste();
    		}
    		if(e.getSource()==rq){
    			SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    			JOptionPane.showMessageDialog(this, df.format(new Date()));
    		}
    		if(e.getSource()==font){
    			String s=JOptionPane.showInputDialog(this,"请输入字体名称：","宋体");
    			panel.setFont(new Font(s,Font.TYPE1_FONT,20));
    		}
    		if(e.getSource()==gy){
    			JOptionPane.showMessageDialog(this, "路漫漫其修远兮，吾将上下而求索！");
    		}
    		if(e.getSource()==help){
    			String web="www.baidu.com";
    			Desktop desktop=Desktop.getDesktop();
    			try {
    				desktop.browse(new URI(web));
    			} catch (IOException e1) {
    				// TODO Auto-generated catch block
    				e1.printStackTrace();
    			} catch (URISyntaxException e1) {
    				// TODO Auto-generated catch block
    				e1.printStackTrace();
    			}	
    		}
    		if(e.getSource()==zdhh){
    			if(zdhh.isSelected()){
    				panel.setLineWrap(true);
    			}else{
    			panel.setLineWrap(false );
    			}
    		}
    	}
    	@SuppressWarnings("finally")
    	private String openFile() {
    		FileInputStream is=null;
    		StringBuilder sb=null;
    		//FileOutputStream fo=null;
    		try {
    			is=new FileInputStream(filechooser.getSelectedFile());
    			sb=new StringBuilder();
    			byte[] data=new byte[1024];
    			int len=-1;
    			try {
    				while((len=is.read(data))!=-1){
    					String str=new String(data,0,len);
    					sb.append(str);
    				}
    			} catch (IOException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    		} catch (FileNotFoundException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		try {
    			is.close();
    		} catch (IOException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		finally{
    			name = filechooser.getSelectedFile().getName();
    			this.setTitle(name + " - 记事本");
    			return sb.toString();
    		}
    		
    	}
    	private void createFile() {
    		// String name = null;
    		File file = null;
    		// 选择保存或取消
    		if (filechooser.showSaveDialog(jsb.this) == JFileChooser.APPROVE_OPTION) {
    			file = filechooser.getSelectedFile();// 获取选中的文件
    		} else {
    			return;
    		}
    		name = filechooser.getName(file);// 获取输入的文件名
    		if (file.exists()) { // 若选择已有文件----询问是否要覆盖
    			int i = JOptionPane.showConfirmDialog(null, "该文件已存在,是否覆盖原文件", "确认", JOptionPane.YES_NO_OPTION);
    			if (i == JOptionPane.YES_OPTION) {
    				saveFile(file);
    			} else {
    				filechooser.showSaveDialog(jsb.this);// 重新选择
    			}
    		} else {//文件不存在，则直接保存
    			saveFile(file);
    		}
    	}
    	private void saveFile(File file) {
    		BufferedWriter bw = null;
    		try {
    			bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));
    			bw.write(panel.getText());//写入文件
    			bw.flush();
    		} catch (FileNotFoundException e1) {
    			JOptionPane.showMessageDialog(jsb.this, "文件保存出错" + e1.getMessage());
    		} catch (IOException e1) {
    			e1.printStackTrace();
    		} finally {
    			try {
    				if (bw != null)
    					bw.close();
    			} catch (IOException e1) {
    			}
    		}
    	}
    
    
    }