java文本编辑器v2.0 图形用户界面

package 文本编辑器;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JRadioButton;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.KeyStroke;
import javax.swing.WindowConstants;


@SuppressWarnings("serial")
public class TextEditBox extends JFrame {
	// 加入属性
	private JComboBox combox_name, combox_size;// 字体、字号组合框
	private JButton button_larger,button_smaller,button_color;//字体变大变小和颜色选择器
	private JCheckBox checkb_bold, checkb_italic;// 粗体、斜体复选框
	private JPopupMenu popupmenu;
	private JTextArea ta = new JTextArea();
	private JScrollPane sp = new JScrollPane(ta);
	//查找对话框属性
	private JTextField tf_search;
	private JButton button_next;
	//
	private int key=0;

	public TextEditBox(String str) {
		super(str);
		this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		Dimension dim = getToolkit().getScreenSize(); // 获得屏幕分辨率
		this.setBounds(dim.width / 4, dim.height / 4, 700, 480);
		JToolBar toolbar = new JToolBar(); // 创建工具栏
		this.add(toolbar, BorderLayout.NORTH); // 工具栏加入到窗格北部
		this.add(sp);
		ta.setLineWrap(true);// 换行
		//////////////////字体
		GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
		String[] fontsName = ge.getAvailableFontFamilyNames(); // 获得系统字体
		combox_name = new JComboBox(fontsName);
		toolbar.add(combox_name);
		combox_name.addActionListener(new ActionListener() {// 字号
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize();
				ta.setFont(new Font(fontname, style, size));
			}
		});
		/////////////////字号
		String sizestr[] = { "20", "30", "40", "50", "60", "70" ,"80","90","100"};
		combox_size = new JComboBox(sizestr);
		combox_size.setEditable(true);
		toolbar.add(combox_size);
		combox_size.addActionListener(new ActionListener() {// 字号
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				int size = Integer.parseInt((String)combox_size.getSelectedItem());
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				ta.setFont(new Font(fontname, style, size));
			}
		});
		////////////////////字号加减按钮
		button_larger=new JButton("A+");
		toolbar.add(button_larger);
		button_larger.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize()+5;
				ta.setFont(new Font(fontname, style, size));
			}
		});
		button_smaller=new JButton("A-");
		toolbar.add(button_smaller);
		button_smaller.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize()-5;
				ta.setFont(new Font(fontname, style, size));
			}
		});
		/////////////////J
		/////////////////粗体和斜体
		checkb_bold = new JCheckBox("粗体"); //字形复选框
        toolbar.add(checkb_bold);
        checkb_bold.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize();
				style = style ^ 1;
				ta.setFont(new Font(fontname, style, size));
			}
		});
        checkb_italic = new JCheckBox("斜体");
        toolbar.add(checkb_italic);
        checkb_italic.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize();
				style = style ^ 2;
				ta.setFont(new Font(fontname, style, size));
			}
		});
        ////////////////
        JRadioButton radiob_color[];
        String colorstr[]={"红","绿","蓝"};
        ButtonGroup bgroup_color = new ButtonGroup();      //按钮组
        radiob_color = new JRadioButton[colorstr.length];  //颜色单选按钮数组
        for (int i=0; i<radiob_color.length; i++){
            radiob_color[i]=new JRadioButton(colorstr[i]); 
            bgroup_color.add(radiob_color[i]); //加入到按钮组
            toolbar.add(radiob_color[i]);     //加入到工具栏
        }        
        radiob_color[0].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.red);// 设置颜色
			}
		});
        radiob_color[1].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.green);
			}
		});
        radiob_color[2].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.blue);
			}
		});
        ///////////////颜色选择器
        button_color=new JButton("其它");
        toolbar.add(button_color);
        button_color.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Color color;
				color=JColorChooser.showDialog(TextEditBox.this,"颜色选择", Color.black);
				ta.setForeground(color);// 设置颜色
			}
		});
		////////////////鼠标事件
		ta.addMouseListener(new MouseAdapter() {// 鼠标事件处理方法。右击弹出菜单
			public void mouseClicked(MouseEvent e) {
				if (e.getModifiers() == MouseEvent.BUTTON3_MASK) // 单击的是鼠标右键
					popupmenu.show(ta, e.getX(), e.getY()); // 在鼠标单击处显示快捷菜单
			}
		});
		////////////////
		this.addmyMenu();       //调用自己定义方法，加入菜单
		this.setVisible(true);
	}

	private void addmyMenu() {// 加入主菜单、快捷菜单、对话框
		JMenuBar menubar = new JMenuBar(); // 菜单条
		this.setJMenuBar(menubar); // 加入菜单条
		String menustr[] = { "文件", "编辑", "工具", "帮助" };
		JMenu menu[] = new JMenu[menustr.length];
		for (int i = 0; i < menustr.length; i++) {
			menu[i] = new JMenu(menustr[i]); // 菜单
			menubar.add(menu[i]); // 菜单条中加入菜单
		}
		////////////////////////////////
		JMenuItem menuitem_open = new JMenuItem("打开");
		menu[0].add(menuitem_open);
		menuitem_open.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JFileChooser filechooser = new JFileChooser();
				int result = filechooser.showOpenDialog(TextEditBox.this);
				if (result == JFileChooser.APPROVE_OPTION) {
					try {
						File file = filechooser.getSelectedFile();
						FileReader fr = new FileReader(file);
						BufferedReader br = new BufferedReader(fr);
						ta.setText("");
						String text;
						while ((text = br.readLine()) != null) {
							ta.append(text);
						}
						fr.close();
						br.close();
					} catch (Exception ex) {
						JOptionPane.showMessageDialog(TextEditBox.this,"打开文档出错！");
					}
				}
			}
		});
		JMenuItem menuitem_save = new JMenuItem("保存");
		menu[0].add(menuitem_save);
		menuitem_save.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JFileChooser filechooser = new JFileChooser();
				int result = filechooser.showSaveDialog(TextEditBox.this);
				if (result == JFileChooser.APPROVE_OPTION) {
					try {
						File file = filechooser.getSelectedFile();
						FileWriter fw = new FileWriter(file);
						BufferedWriter bw = new BufferedWriter(fw);
						String text=ta.getText();
						fw.write(text);
						fw.close();
						bw.close();
					} catch (Exception ex) {
						JOptionPane.showMessageDialog(TextEditBox.this,"打开文档出错。");
					}
				}

			}
		});
		menu[0].addSeparator(); // 加分隔线
		JMenuItem menuitem_exit = new JMenuItem("退出");
		menu[0].add(menuitem_exit);
		menuitem_exit.addActionListener(new ActionListener() {// 退出
					public void actionPerformed(ActionEvent e) {
						System.exit(0);
					}
				});
		/////////////////////////////
		JMenu menu_style = new JMenu("字形");
		JCheckBoxMenuItem checkboxmenuitem_bold = new JCheckBoxMenuItem("粗体");
		menu_style.add(checkboxmenuitem_bold);
		JCheckBoxMenuItem checkboxmenuitem_italic = new JCheckBoxMenuItem("斜体");
		menu_style.add(checkboxmenuitem_italic);
		menu[1].add(menu_style); // 菜单加入到菜单中成为二级菜单
		checkboxmenuitem_bold.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize();
				style = style ^ 1;
				ta.setFont(new Font(fontname, style, size));
			}
		});
		
		checkboxmenuitem_italic.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String fontname = (String)combox_name.getSelectedItem();//获得字体名
				Font font = ta.getFont();     //获得文本区的当前字体对象
				int style = font.getStyle();      //获得字形
				int size = font.getSize();
				style = style ^ 2;
				ta.setFont(new Font(fontname, style, size));
			}
		});
		////////////////////////////
		JMenu menu_color = new JMenu("颜色");
		menu[1].add(menu_color);
		ButtonGroup buttongroup = new ButtonGroup();
		String colorstr[] = { "红", "绿", "蓝" };
		JRadioButtonMenuItem rbmi_color[] = new JRadioButtonMenuItem[colorstr.length];
		for (int i = 0; i < rbmi_color.length; i++) {
			rbmi_color[i] = new JRadioButtonMenuItem(colorstr[i]); // 单选菜单项
			buttongroup.add(rbmi_color[i]);
			menu_color.add(rbmi_color[i]);
		}
		rbmi_color[0].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.red);
			}
		});
		rbmi_color[1].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.green);
			}
		});
		rbmi_color[2].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.setForeground(Color.blue);
			}
		});
		/////////////////////////////////
		JMenuItem menuitem_countwordsnum = new JMenuItem("字数统计");
		menu[2].add(menuitem_countwordsnum);
		menuitem_countwordsnum.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int count=0;
				for(int i=0;i<ta.getText().length();i++){
					if(!ta.getText().substring(i,i+1).equals(" ")){
						count++;
					}
				}
				JOptionPane.showMessageDialog(TextEditBox.this, "文本框中一共同拥有"+count+"个字符！
");
			}
		});
		menu[2].addSeparator(); // 加分隔线
		JMenuItem menuitem_search = new JMenuItem("查找");
		menu[2].add(menuitem_search);
		menuitem_search.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				new MessageJDialog();
				
				button_next.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent e) {
						String str_search=tf_search.getText();
						int len = str_search.length();
						for (int i = key; i < ta.getText().length() - len + 1; i++) {
							String str_record = ta.getText().substring(i, i + len);
							if (str_record.equals(str_search)) {
								key = i + 1;
								ta.requestFocus();
								ta.select(i, i + len);
								return;
							}
						}
					}
				});
				
				key=0;
			}
		});
		JMenuItem menuitem_replace = new JMenuItem("替换");
		menu[2].add(menuitem_replace);
		menuitem_replace.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String str_replace=JOptionPane.showInputDialog(TextEditBox.this,
						"请输入你要替换的字符串:" );
				String str_replacelater=JOptionPane.showInputDialog(TextEditBox.this,
						"请输入你要用来替换的内容:" );
				int len=str_replace.length();
				for(int i=0;i<ta.getText().length()-len+1;i++){
					String str_record=ta.getText().substring(i, i+len);
					if(str_record.equals(str_replace)){
						ta.replaceRange(str_replacelater,i, i+len);
					}
				}
			}
		});
		/////////////////////////////////
		JMenuItem menuitem_about = new JMenuItem("关于");
		menu[3].add(menuitem_about);
		menuitem_about.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(TextEditBox.this,"文本编辑器v1.0   开发人员：hhtx");
			}
		});
		////////////////////////////////////////////////// 快捷菜单对象
		popupmenu = new JPopupMenu();
		String menuitemstr[] = { "剪切", "复制", "粘贴" };
		JMenuItem popmenuitem[] = new JMenuItem[menuitemstr.length];
		for (int i = 0; i < popmenuitem.length; i++) {
			popmenuitem[i] = new JMenuItem(menuitemstr[i]);// 菜单项
			popupmenu.add(popmenuitem[i]);// 快捷菜单加入菜单项
		}
		popmenuitem[0].setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
				InputEvent.CTRL_MASK));// 设置快捷键Ctrl+X
		popmenuitem[1].setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,
				InputEvent.CTRL_MASK));// 设置快捷键Ctrl+C
		popmenuitem[2].setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,
				InputEvent.CTRL_MASK));// 设置快捷键Ctrl+V

		popmenuitem[0].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.cut(); //将选中文本剪切送系统剪贴板
			}
		});
		popmenuitem[1].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.copy(); //将选中文本复制送系统剪贴板
			}
		});
		popmenuitem[2].addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ta.paste();//剪贴板的文本粘贴在当前位置
			}
		});
		ta.add(popupmenu); // 文本区加入快捷菜单
	}

	//
	private class MessageJDialog extends JDialog {
		private JLabel lable_tip;
		private JPanel panel_next = new JPanel();
		private JPanel panel_search = new JPanel();
		private JPanel panel_tip = new JPanel();

		public MessageJDialog() {
			super(TextEditBox.this, "查找");
			this.setSize(300, 170);
			this.setLocation(TextEditBox.this.getX() + 200,
					TextEditBox.this.getY() + 200);
			this.setLayout(new GridLayout(3, 1));
			//
			ImageIcon imageIcon = new ImageIcon("img/search.png");
			lable_tip = new JLabel("请输入你要查找的字符串：", imageIcon, JLabel.LEFT);
			panel_tip.add(lable_tip);
			this.add(panel_tip);
			tf_search = new JTextField(20);
			panel_search.add(tf_search);
			this.add(panel_search);
			button_next = new JButton("查找下一个");
			panel_next.add(button_next);
			this.add(panel_next);
			this.setVisible(true);
		}
	}
	
	public static void main(String args[]) {
		new TextEditBox("文本编辑器v1.0");
	}
}