java Swing 实现记事本

/*       Copyright (C) 2017 mzy  <[e-mail]>    This program is free software: you can redistribute it and/or modify    it under the terms of the GNU General Public License as published by    the Free Software Foundation, either version 3 of the License, or    (at your option) any later version.    This program is distributed in the hope that it will be useful,    but WITHOUT ANY WARRANTY; without even the implied warranty of    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    GNU General Public License for more details.    You should have received a copy of the GNU General Public License    along with this program.  If not, see <https://www.gnu.org/licenses/>.*/package notepad;import java.awt.Color;/** * * @author 半步疯子 * @version 1.0 */import java.awt.Container;import java.awt.Dimension;import java.awt.Font;import java.awt.GraphicsEnvironment;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.PrintStream;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JList;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JPopupMenu;import javax.swing.JScrollPane;import javax.swing.JSpinner;import javax.swing.JTextArea;import javax.swing.SpinnerModel;import javax.swing.SpinnerNumberModel;import javax.swing.filechooser.FileNameExtensionFilter;public class Notepad extends JFrame implements ActionListener{public static void main(String[] args) {new Notepad();}private static final long serialVersionUID = -2843137103983861960L;JTextArea text; // 必须使用JTextArea  不然第二次显示会出问题public Notepad(){notepadUI();setVisible(true); // setVisible 为true的时候是显示前面添加在JFrame上在组建，所以需要放在最后面}private void notepadUI() {// 设置基本属性   setTitle("MZY记事本");setSize(600, 400);setDefaultCloseOperation(EXIT_ON_CLOSE);setLocationRelativeTo(null);setIconImage(new ImageIcon("icon/notepad.png").getImage());// setIconImage(new ImageIcon(getClass().getResource("icon/notepad.png")).getImage());//图标放在源目录的icon文件夹Container cp = getContentPane();// 怎么将JMenuItem显示在container层上text = new JTextArea();text.setFont(new Font("新宋体",Font.PLAIN, 24));cp.add(new JScrollPane(text));String[] captions = {"文件(F)","编辑(E)","格式(O)","帮助(H)"};String[][] titles = {{"新建","打开...","保存","另存为...", "-", "退出"},{"复制","剪切","粘贴","全选"},{"字体(F)..."},{"帮助","-","关于记事本"}};// JMenuBar ->  JMenuBar menuBar = new JMenuBar();JMenu menu;JMenuItem item;for(int i =0; i<captions.length; i++){menu = new JMenu(captions[i]);menu.setFont(new Font("黑体",Font.PLAIN, 20));menuBar.add(menu);for(int j=0; j<titles[i].length; j++ ){String caption = titles[i][j];if("-".equals(caption)){menu.addSeparator(); // 给menuItem加一个分隔符continue;}item = new JMenuItem(titles[i][j]);item.setPreferredSize(new Dimension(120, 35));item.setFont(new Font("黑体",Font.PLAIN, 18));// item.setBorder(BorderFactory.createLineBorder(Color.black,3));menu.add(item);item.addActionListener(this);}}      this.setJMenuBar(menuBar);            final JPopupMenu rightClick = new JPopupMenu();      // rightClick.setBackground(Color.GRAY);      rightClick.setPreferredSize(new Dimension(100, 150));      JMenuItem cut = new JMenuItem("剪切");      JMenuItem copy = new JMenuItem("复制");      JMenuItem paste = new JMenuItem("粘贴");      JMenuItem selectAll = new JMenuItem("全选");      cut.setFont(new Font("黑体",Font.PLAIN, 18));      copy.setFont(new Font("黑体",Font.PLAIN, 18));      paste.setFont(new Font("黑体",Font.PLAIN, 18));      selectAll.setFont(new Font("黑体",Font.PLAIN, 18));            rightClick.add(cut).addActionListener(this);      rightClick.add(copy).addActionListener(this);      rightClick.add(paste).addActionListener(this);      rightClick.addSeparator();      rightClick.add(selectAll).addActionListener(this);            text.add(rightClick);      text.addMouseListener(new MouseAdapter() {          public void mouseReleased(MouseEvent e) {              if (e.getButton() == MouseEvent.BUTTON3) {              rightClick.show(text, e.getX(), e.getY());              }          }      });      }/** * about my mylistener */String pathOld;@SuppressWarnings("resource")public void actionPerformed(ActionEvent e) {String s = e.getActionCommand();if("新建".equals(s)) {text.setText("");pathOld = null;}if("退出".equals(s)) {this.dispose();}if("字体(F)...".equals(s)) {new MyFormat(text);}if("另存为...".equals(s)) {aboutSave();}if("保存".equals(s)) {PrintStream printStream = null;if(null != pathOld) {try {    printStream = new PrintStream(pathOld);  // printStream     System.setOut(printStream); // 改变输出流的位置                    System.out.println(text.getText()); // 将内容打印输出到目标文件上    } catch (FileNotFoundException e1) {    e1.printStackTrace();    } finally {    if(null != printStream) {    printStream.close();    }    }} else {aboutSave();}}if("打开...".equals(s)) {            JFileChooser chooser = new JFileChooser();            // FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");            // chooser.setFileFilter(filter);            chooser.setDialogTitle("文件打开");            int choose = chooser.showOpenDialog(null);            // chooser.setVisible(true);            if(JFileChooser.APPROVE_OPTION  == choose){            pathOld= chooser.getSelectedFile().getPath();                FileReader reader = null;    try {    reader = new FileReader(pathOld);    BufferedReader bufferReader = new BufferedReader(reader);                    String temp = "", target = "";                    while ((temp = bufferReader.readLine()) != null) {    target += (temp + "\n");    }                    text.setText(target);    } catch (FileNotFoundException e1) {    e1.printStackTrace();    } catch (IOException e1) {    e1.printStackTrace();    } finally {    if(null != reader) {    try {    reader.close();    } catch (IOException e1) {    e1.printStackTrace();    }    }    }            }         }// {"复制","剪切","粘贴","全选","反向选择"},if ("剪切".equals(s)) {            text.cut();        }if ("复制".equals(s)) {            text.copy();        }if ("粘贴".equals(s)) {            text.paste();        }        if ("全选".equals(s)) {            text.selectAll();        }if("关于记事本".equals(s)) {new AboutMyNotepad();}if("帮助".equals(s)) {new AboutHelp();}}private void aboutSave() {JFileChooser  chooser = new JFileChooser();FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");chooser.setFileFilter(filter);        chooser.setDialogTitle("另存为");        int choose = chooser.showSaveDialog(null);        // chooser.setVisible(true);                PrintStream printStream = null;        // getSelectedFile返回选中的文件(得到一个File对象)再调用File的getPath方法        // getPath返回值为String类型的 抽象路径名               if(JFileChooser.APPROVE_OPTION  == choose){        String select = chooser.getSelectedFile().getPath();            try {printStream = new PrintStream(select);  // printStream System.setOut(printStream); // 改变输出流的位置                System.out.println(text.getText()); // 将内容打印输出到目标文件上} catch (FileNotFoundException e1) {e1.printStackTrace();} finally {if(null != printStream) {printStream.close();}}        }}}class MyFormat extends JDialog implements ActionListener{private static final long serialVersionUID = 1L;public static int style = 0;public static int bounds = 16;public static Font font = new Font("黑体", style, bounds);JTextArea text;Container cp = getContentPane();// notrh// centerGraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();// 获取系统中可用的字体的名字String[] fontName = e.getAvailableFontFamilyNames();String[] fontStyle = {"常规", "倾斜", "粗体", "粗斜"};JList<String> fontList = new JList<String>(fontName);JList<String> StyleList = new JList<String>(fontStyle);// SpinnerNumberModel(Number value, Comparable minimum, Comparable maximum, Number stepSize) SpinnerModel spinnerModel = new SpinnerNumberModel(bounds, 0, 80, 2);JSpinner spinner = new JSpinner(spinnerModel); // 上下的小箭头// southJButton ok = new JButton("确定");JButton cancel = new JButton("取消");MyFormat(JTextArea text){this.text = text;setIconImage(new ImageIcon("icon/notepad.png").getImage());cp.setPreferredSize(new Dimension(500, 300));        cp.setLayout(null);JLabel l2 = new JLabel("字形");JLabel l1 = new JLabel("字体");JLabel l3 = new JLabel("大小");l1.setFont(new Font("华文行楷",Font.BOLD, 28));l2.setFont(new Font("华文行楷",Font.BOLD, 28));l3.setFont(new Font("华文行楷",Font.BOLD, 28));l1.setBounds(40, 20, 140, 35);l2.setBounds(215, 20, 120, 35);l3.setBounds(360, 20, 75, 35);cp.add(l1);cp.add(l2);cp.add(l3);StyleList.setFont(new Font("新宋体",0 , 18));JScrollPane j2 = new JScrollPane(StyleList);fontList.setFont(new Font("新宋体",0 , 12));JScrollPane j1 = new JScrollPane(fontList);spinner.setFont(new Font("新宋体",1 , 18));j1.setBounds(40, 75, 150, 175);j2.setBounds(215, 75, 80, 120);spinner.setBounds(360, 75, 45, 50);cp.add(j1);cp.add(j2);cp.add(spinner);ok.addActionListener(this);cancel.addActionListener(this);cp.add(ok);cp.add(cancel);ok.setBounds(245, 240, 80, 30);cancel.setBounds(380, 240, 80, 30);setTitle("字体");setVisible(true);        setLocationRelativeTo(null);        setResizable(false); // 设置为大小不可变的pack(); // 调整计算全部都可显示的大小  这一句必须放在最后不然没法显示}public void actionPerformed(ActionEvent e) {String s = e.getActionCommand();if("确定".equals(s)) {style = myGetType();bounds = Integer.parseInt(spinner.getValue().toString());font = new Font((String)fontList.getSelectedValue(), style, bounds);text.setFont(font);this.dispose();}if("取消".equals(s)) {dispose();}}private int myGetType() {if("常规".equals(StyleList.getSelectedValue())) {return 0;} else if("倾斜".equals(StyleList.getSelectedValue())) {return 1;} else if("粗体".equals(StyleList.getSelectedValue())) {return 2;} else if("粗斜".equals(StyleList.getSelectedValue())) {return 3;}return 0;}}class AboutHelp extends JDialog {// 关于窗口private static final long serialVersionUID = 1L;AboutHelp() {JTextArea t = new JTextArea();t.setFont(new Font("微软雅黑",1 , 16));String s = "   作者：半步疯子          "+ "实现功能均可点击 :"+ "右键点击也可操作";        t.setText(s);        t.setEditable(false);        add(t);        setIconImage(new ImageIcon("icon/notepad.png").getImage());        setSize(480, 100);        setVisible(true);        setLocationRelativeTo(null);        setResizable(false); // 设置为大小不可变的  }}class AboutMyNotepad extends JDialog {// 关于窗口private static final long serialVersionUID = 1L;AboutMyNotepad() {JTextArea t = new JTextArea();t.setFont(new Font("微软雅黑",1 , 16));String s = "   作者：半步疯子          "+ "版本：mzy1.0     "+ " 联系：[e-mail]";        t.setText(s);        t.setEditable(false);        add(t);        setIconImage(new ImageIcon("icon/notepad.png").getImage());        setSize(550, 100);        setVisible(true);        setLocationRelativeTo(null);        setResizable(false); // 设置为大小不可变的  }}