JAVA写文本编辑器源码

package FileManagementTest1; import javafx.application.*; import javafx.stage.Stage; import javafx.scene.*; import javafx.scene.control.*; import javafx.scene.layout.GridPane; import javafx.scene.layout.HBox; import javafx.scene.layout.VBox; import javafx.geometry.*; import java.awt.*; import java.awt.Dialog; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; 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 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.JScrollPane; import javax.swing.JTextArea; import javax.swing.KeyStroke; public class fileManagement extends JFrame implements ActionListener{ private JMenuBar menuBar; //菜单栏 private JMenu menu_File,menu_Edit,menu_Help,menu_Format; //菜单栏内的菜单 private JMenuItem item_new,item_open,item_save,item_exit; //对于file菜单的子项 private JMenuItem item_undo,item_cut,item_copy,item_stick,item_delete; //对于edit菜单的子项 private JMenuItem item_about; //对于help菜单的子项 private JMenuItem item_word_format; private static JTextArea edit_text_area; //private JTextArea edit_text_area; //编辑区域 private JScrollPane scroll_bar; //可滚动的pane 里面添加edit_text_area就可以变为一个可以滚动的文本框，JScrollPane是一个pane，同时可以设置方向 private JFileChooser fileChooser = null; //JFileChooser组件 响应时间弹出对话框 public static void main(String[] args) { fileManagement m1 = new fileManagement(); } public static JTextArea getEdit_text_area() { //public JTextArea getEdit_text_area() { return edit_text_area; } public fileManagement(){ initMenuBar(); initEditArea(); initListener(); this.setJMenuBar(menuBar); this.setSize(800,600); this.add(scroll_bar); this.setTitle("自定义文本编辑器"); this.setVisible(true); this.setLocationRelativeTo(null); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } /** * 初始化编辑区域 * 用scrollpane装textarea * 同时对pane设置方向 */ public void initEditArea() { edit_text_area = new JTextArea(); scroll_bar = new JScrollPane(edit_text_area); scroll_bar.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); } /** * 初始化菜单栏，对菜单栏添加子菜单menu * 同时可以给菜单添加二级菜单、菜单项 */ public void initMenuBar() { menuBar = new JMenuBar(); menu_File = new JMenu("文件(F)"); menu_File.setMnemonic('f');//f+alt打开 item_new = new JMenuItem("新建"); item_open = new JMenuItem("打开"); item_save = new JMenuItem("保存"); item_exit = new JMenuItem("退出"); menu_File.add(item_new); menu_File.add(item_open); menu_File.add(item_save); menu_File.add(item_exit); //File 菜单 menu_Edit = new JMenu("编辑(E)"); menu_Edit.setMnemonic('e'); item_undo = new JMenuItem("撤销"); item_cut = new JMenuItem("剪切"); item_copy = new JMenuItem("复制"); item_stick = new JMenuItem("粘贴"); item_delete = new JMenuItem("删除"); menu_Edit.add(item_undo); menu_Edit.add(item_cut); menu_Edit.add(item_copy); menu_Edit.add(item_stick); menu_Edit.add(item_delete); //Edit 菜单 menu_Help = new JMenu("帮助(H)"); menu_Help.setMnemonic('h'); item_about = new JMenuItem("关于"); menu_Help.add(item_about); //Help 菜单 menu_Format = new JMenu("格式(O)"); menu_Format.setMnemonic('o'); item_word_format = new JMenuItem("字体(F)"); item_word_format.setAccelerator(KeyStroke.getKeyStroke('F',java.awt.Event.CTRL_MASK,false));//给item添加快捷键 menu_Format.add(item_word_format); menuBar.add(menu_File); menuBar.add(menu_Edit); menuBar.add(menu_Format); menuBar.add(menu_Help); } /** * 对所有btn跟item统一设置监听器 */ public void initListener() { item_new.addActionListener(this); item_open.addActionListener(this); item_save.addActionListener(this); item_exit.addActionListener(this); item_undo.addActionListener(this); item_cut.addActionListener(this); item_copy.addActionListener(this); item_stick.addActionListener(this); item_delete.addActionListener(this); item_word_format.addActionListener(this); item_about.addActionListener(this); } /** * 对所有menu里所有item的事件监听器 */ @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == item_about) { new about_Window(); }else if (e.getSource() == item_word_format) { about_Format newFormat = new about_Format(); }else if (e.getSource() == item_new) { new fileManagement(); // 选中新建 new一个新窗口 ，有bug，关闭任意子窗口父窗口也会跟着关闭 }else if (e.getSource() == item_exit) { this.dispose(); }else if (e.getSource() == item_open) { openFile(); }else if (e.getSource() == item_save) { saveFile(); } } private void saveFile() { File file = null; int result ; fileChooser = new JFileChooser("C:\\"); fileChooser.setApproveButtonToolTipText("保存"); // 设置确认按钮的现实文本 fileChooser.setDialogTitle("保存文件"); // 设置title result = fileChooser.showOpenDialog(rootPane); // 设置Dialog的根View 根布局 //-------------------------------------------------------------------------- if(result == JFileChooser.APPROVE_OPTION) { file = fileChooser.getSelectedFile(); // 若点击了确定按钮，给file填文件路径 } //-------------------------------------------------------------------------- /*FileOutputStream fileOutputStream = null; // 文件io类 if (file != null) { try { fileOutputStream = new FileOutputStream(file); }catch (FileNotFoundException e) { e.printStackTrace(); } String content = edit_text_area.getText(); try { fileOutputStream.write(content.getBytes()); }catch (IOException e) { e.printStackTrace(); }finally { try { if (fileOutputStream!=null) { fileOutputStream.close(); } }catch (IOException e) { e.printStackTrace(); } } }*/ //---------------这里有严重bug，对于字符写入文件没问题，但是在读取中文字符的时候会出现乱码----------- //-------------------------------------------------------------------------- try{ OutputStreamWriter write = new OutputStreamWriter(new FileOutputStream(file),"UTF-8"); // 对字符进行编码转换 BufferedWriter writer = new BufferedWriter(write); String content = edit_text_area.getText(); writer.write(content); writer.close(); }catch(IOException e) { e.printStackTrace(); } } /** * 点击新建按item时 打开JFileChooser对话框 * 并且对文件读取进行处理 */ private void openFile() { File file = null; int result ; fileChooser = new JFileChooser("C:\\"); fileChooser.setApproveButtonToolTipText("确定"); // 设置确认按钮的现实文本 fileChooser.setDialogTitle("打开文件"); // 设置title result = fileChooser.showOpenDialog(rootPane); // 设置Dialog的根View 根布局 //-------------------------------------------------------------------------- if(result == JFileChooser.APPROVE_OPTION) { file = fileChooser.getSelectedFile(); // 若点击了确定按钮，给file填文件路径 } //-------------------------------------------------------------------------- //--------------------下面对文件进行处理，把内容装到父窗体的textarea中-------------------- /*FileInputStream fileInputStream = null; if (file != null) { try { //此处需要注意空指针异常 即没有找到文件的时候需要处理 fileInputStream = new FileInputStream(file); // 将file文件的数据流装到fileInputStream里