java记事本_增加关闭响应.java

能够编辑文本文档的程序

					if (result == JFileChooser.CANCEL_OPTION) {
						statusLabel1.setText("您没有选择任何文件");
						return;
					}
					saveFileName = fileChooser.getSelectedFile();
					if (saveFileName == null || saveFileName.getName().equals(""))
						JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
					else {
						saveFile();
						Text.setText("");
						this.setTitle("新建文本");
						statusLabel1.setText("　新建文本");
					}
				} else if (saveChoose == JOptionPane.NO_OPTION) {
					Text.replaceRange("", 0, Text.getText().length());
					statusLabel1.setText("　新建文件");
					this.setTitle("无标题 - 记事本");
					isNewFile = true;
					undo.discardAllEdits(); // 撤消所有的"撤消"操作
					mEdit_Undo.setEnabled(false);
					popupMenu_Undo.setEnabled(false);
					undoButton.setEnabled(false);
					redoButton.setEnabled(false);
					oldValue = Text.getText();
				} else if (saveChoose == JOptionPane.CANCEL_OPTION) {
					return;
				}
			} else {
				// Text.replaceRange("", 0, Text.getText().length());
				Text.setText("");
				statusLabel1.setText("　新建文件");
				this.setTitle("无标题 - 记事本");
				isNewFile = true;
				undo.discardAllEdits();
				mEdit_Undo.setEnabled(false);
				popupMenu_Undo.setEnabled(false);
				undoButton.setEnabled(false);
				oldValue = Text.getText();
			}
		}// 新建处理结束

		// 打开
		else if (e.getActionCommand().equals("打开(O)") || e.getSource() == openButton) {
			Text.requestFocus();
			String currentValue = Text.getText();
			boolean isTextChange = (currentValue.equals(oldValue)) ? false : true;

			if (isTextChange) {

				int saveChoose = JOptionPane.showConfirmDialog(this, "您的文件尚未保存。是否保存?", "提示", JOptionPane.YES_NO_CANCEL_OPTION);

				if (saveChoose == JOptionPane.YES_OPTION) {
					JFileChooser fileChooser = new JFileChooser();
					fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
					fileChooser.setApproveButtonText("确定");
					fileChooser.setDialogTitle("另存为");

					int result = fileChooser.showSaveDialog(this);

					if (result == JFileChooser.CANCEL_OPTION) {
						statusLabel1.setText("您没有选择任何文件");
						return;
					}

					saveFileName = fileChooser.getSelectedFile();

					if (saveFileName == null || saveFileName.getName().equals(""))
						JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
					else {
						saveFile();
						isNewFile = false;
						currentFile = saveFileName;
						oldValue = Text.getText();
						this.setTitle(saveFileName.getName() + "  - 记事本");
						statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile());
					}
				} else if (saveChoose == JOptionPane.NO_OPTION) {
					String str = null;
					JFileChooser fileChooser = new JFileChooser();
					fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
					fileChooser.setApproveButtonText("确定");
					fileChooser.setDialogTitle("打开文件");
					int result = fileChooser.showOpenDialog(this);
					if (result == JFileChooser.CANCEL_OPTION) {
						statusLabel1.setText("您没有选择任何文件");
						return;
					}
					fileName = fileChooser.getSelectedFile();
					if (fileName == null || fileName.getName().equals(""))
						JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
					else {
						try {
							FileReader fr = new FileReader(fileName);
							BufferedReader bfr = new BufferedReader(fr);
							Text.setText("");
							while ((str = bfr.readLine()) != null) {// 每次读取一行，直到文件结束
								Text.append(str + "\15\12");
							}// endwhile
							this.setTitle(fileName.getName() + "  - 记事本");
							statusLabel1.setText("　当前打开文件:" + fileName.getAbsoluteFile());
							fr.close();
							isNewFile = false;
							currentFile = fileName;
							oldValue = Text.getText();
						} catch (IOException ioException) {
						}
					}
				} else {
					return;
				}
			}

			else {
				String str = null;
				JFileChooser fileChooser = new JFileChooser();
				fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
				fileChooser.setApproveButtonText("确定");
				fileChooser.setDialogTitle("打开文件");
				int result = fileChooser.showOpenDialog(this);
				if (result == JFileChooser.CANCEL_OPTION) {
					statusLabel1.setText("　您没有选择任何文件");
					return;
				}
				fileName = fileChooser.getSelectedFile();
				if (fileName == null || fileName.getName().equals(""))
					JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
				else {
					try {
						FileReader fr = new FileReader(fileName);
						BufferedReader bfr = new BufferedReader(fr);
						Text.setText("");
						while ((str = bfr.readLine()) != null) {// 每次读取一行，直到文件结束
							Text.append(str + "\15\12");
						}// endwhile

						this.setTitle(fileName.getName() + "  - 记事本");
						statusLabel1.setText("　当前打开文件:" + fileName.getAbsoluteFile());
						fr.close();
						isNewFile = false;
						currentFile = fileName;
						oldValue = Text.getText();
					} catch (IOException ioException) {
					}
				}

			}
		}// "打开"处理结束

		// 保存
		else if (e.getSource() == mFile_Save || e.getSource() == saveButton) {
			Text.requestFocus();
			if (isNewFile) {
				JFileChooser fileChooser = new JFileChooser();
				fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
				fileChooser.setApproveButtonText("确定");
				fileChooser.setDialogTitle("另存为");
				int result = fileChooser.showSaveDialog(this);
				if (result == JFileChooser.CANCEL_OPTION) {
					statusLabel1.setText("　您没有选择任何文件");
					return;
				}
				saveFileName = fileChooser.getSelectedFile();
				if (saveFileName == null || saveFileName.getName().equals(""))
					JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
				else {
					saveFile();
					isNewFile = false;
					currentFile = saveFileName;
					oldValue = Text.getText();
					this.setTitle(saveFileName.getName() + "  - 记事本");
					statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile());
				}
			} else {
				try {
					FileWriter fw = new FileWriter(currentFile);
					BufferedWriter bfw = new BufferedWriter(fw);
					bfw.write(Text.getText(), 0, Text.getText().length());
					bfw.flush();
					fw.close();
				} catch (IOException ioException) {
				}
			}
		}// "保存"处理结束

		// 另存为
		else if (e.getSource() == mFile_ASave || e.getSource() == saveAsButton) {
			Text.requestFocus();
			JFileChooser fileChooser = new JFileChooser();
			fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
			fileChooser.setApproveButtonText("确定");
			fileChooser.setDialogTitle("另存为");
			int result = fileChooser.showSaveDialog(this);
			if (result == JFileChooser.CANCEL_OPTION) {
				statusLabel1.setText("　您没有选择任何文件");
				return;
			}
			saveFileName = fileChooser.getSelectedFile();
			if (saveFileName == null || saveFileName.getName().equals(""))
				JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
			else {
				saveFile();
				isNewFile = false;
				currentFile = saveFileName;
				oldValue = Text.getText();
				this.setTitle(saveFileName.getName() + "  - 记事本");
				statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile());
			}

		}// "另存为"处理结束

		// 打印
		else if (e.getSource() == mFile_Print || e.getSource() == printButton) {
			Text.requestFocus();
			JOptionPane.showMessageDialog(this, "此功能尚未添加!", "提示", JOptionPane.WARNING_MESSAGE);
		}

		// 退出
		else if (e.getSource() == mFile_Exit) {
			int exitChoose = JOptionPane.showConfirmDialog(this, "确定要退出么？", "退出提示", JOptionPane.OK_CANCEL_OPTION);
			if (exitChoose == JOptionPane.OK_OPTION) {
				checkText();
			} else {
				return;
			}
		}

		// 撤消
		else if (e.getSource() == mEdit_Undo || e.getSource() == popupMenu_Undo || e.getSource() == undoButton) {
			Text.requestFocus();
			if (undo.canUndo()) {
				try {
					undo.undo();

				} catch (CannotUndoException ex) {
					System.out.println("Unable to undo: " + ex);
					ex.printStackTrace();
				}

				if (!undo.canUndo()) {
					mEdit_Undo.setEnabled(false);
					popupMenu_Undo.setEnabled(false);
					undoButton.setEnabled(false);

				}
			}
		}

		// 剪切
		else if (e.getSource() == mEdit_Cut || e.getSource() == popupMenu_Cut || e.getSource() == cutButton) {
			Text.requestFocus();
			String text = Text.getSelectedText();
			StringSelection selection = new StringSelection(text);
			clipBoard.setContents(selection, null);
			Text.replaceRange("", Text.getSelectionStart(), Text.getSelectionEnd());
			checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性
		}

		// 复制
		else if (e.getSource() == mEdit_Copy || e.getSource() == popupMenu_Copy || e.getSource() == copyButton) {
			Text.requestFocus();
			String text = Text.getSelectedText();
			StringSelection selection = new StringSelection(text);
			clipBoard.setContents(selection, null);
			checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性
		}

		// 粘贴
		else if (e.getSource() == mEdit_Paste || e.getSource() == popupMenu_Paste || e.getSource() == pasteButton) {
			Text.requestFocus();
			Transferable contents = clipBoard.getContents(this);
			if (contents == null)
				return;
			String text;
			text = "";

			try {
				text = (String) contents.getTransferData(DataFlavor.stringFlavor);
			} catch (Exception exception) {
			}

			Text.replaceRange(text, Text.getSelectionStart(), Text.getSelectionEnd());
			checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性
		}

		// 删除
		else if (e.getSource() == mEdit_Del || e.getSource() == popupMenu_Delete || e.getSource() == deleteButton) {
			Text.requestFocus();
			Text.replaceRange("", Text.getSelectionStart(), Text.getSelectionEnd());
			checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性
		}

		// 查找
		else if (e.getSource() == mEdit_Search || e.getSource() == searchButton) {
			Text.requestFocus();
			if (e.getSource() == searchButton) {
				Text.requestFocus();
				Text.setCaretPosition(0);
			}
			mySearch();
		}

		// 查找下一个(此功能尚未能很好实现，所以就先用查找功能来代替)
		else if (e.getSource() == mEdit_SearchNext) {
			mySearch();
		}

		// 替换(与查找功能集成在一起了)
		else if (e.getSource() == mEdit_Replace) {
			mySearch();
		}

		// 转到
		else if (e.getSource() == mEdit_Turnto) {
			final JDialog gotoDialog = new JDialog(this, "转到下列行");
			JLabel gotoLabel = new JLabel("行数(L):");
			final JTextField linenum = new JTextField(5);
			linenum.setText("1");
			linenum.selectAll();

			JButton okButton = new JButton("确定");
			okButton.addActionListener(new ActionListener() {

				public void actionPerformed(ActionEvent e) {
					int totalLine = Text.getLineCount();
					int[] lineNumber = new int[totalLine + 1];
					String s = Text.getText();
					int pos = 0, t = 0;

					while (true) {
						pos = s.indexOf('\12', pos);
						// System.out.println("引索pos:"+pos);
						if (pos == -1)
							break;
						lineNumber[t++] = pos++;
					}

					int gt = 1;
					try {
						gt = Integer.parseInt(linenum.getText());
					} catch (NumberFormatException efe) {
						JOptionPane.showMessageDialog(null, "请输入行数!", "提示", JOptionPane.WARNING_MESSAGE);
						linenum.requestFocus(true);
						return;
					}

					if (gt < 2 || gt >= totalLine) {
						if (gt < 2)
							Text.setCaretPosition(0);
						else
							Text.setCaretPosition(s.length());
					} else
						Text.setCaretPosition(lineNumber[gt - 2] + 1);

					gotoDialog.dispose();
				}

			});

			JButton cancelButton = new JButton("取消");
			cancelButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					gotoDialog.dispose();
				}
			});

			Container con = gotoDialog.getContentPane();
			con.setLayout(new FlowLayout());
			con.add(gotoLabel);
			con.add(linenum);
			con.add(okButton);
			con.add(cancelButton);

			gotoDialog.setSize(200, 100);
			gotoDialog.setResizable(false);
			gotoDialog.setLocation(300, 280);
			gotoDialog.setVisible(true);

		}// "转到"处理结束

		// 插入时间日期
		else if (e.getSource() == mEdit_TimeDate || e.getSource() == timeButton) {
			Text.requestFocus();
			SimpleDateFormat currentDateTime = new SimpleDateFormat("HH:mm yyyy-MM-dd");
			Text.insert(currentDateTime.format(new Date()), Text.getCaretPosition());