Java流与文件操作汇总.docx

1、Java流与文件操作汇总实验报告课程名称面向对象程序设计实验名称实验八 流与文件操作日期2016-11-18学生学号姓名班级实验目的： 通过本次实验，要求学生能进一步掌握流与文件的操作方法。实验条件： 电脑一台、能上网查阅资料。1. 在课堂代码的基础上，理解相关的文件操作部分的代码，进一步完善记事本的设计。源代码：import java.awt.BorderLayout;import java.awt.Color;import java.awt.EventQueue;import javax.swing.JColorChooser;import javax.swing.JFileChooser

2、;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.event.DocumentEvent;import javax.swing.event.DocumentListener;import javax.swing.filechooser.FileFilter;import javax.swing.JTextArea;import javax.swing.JMenuBar;import javax.swing.JMenu;impo

3、rt javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JScrollPane;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.print.PrinterJob;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundExc

4、eption;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import javax.swing.JPopupMenu;import java.awt.Component;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import javax.swing.

5、KeyStroke;import java.awt.event.KeyEvent;import java.awt.event.InputEvent;import javax.swing.JToolBar;import javax.swing.JLabel;import java.awt.event.KeyAdapter;import javax.swing.JButton;import javax.swing.ImageIcon;public class NotePadPlus extends JFrame private JPanel contentPane; private JTextAr

6、ea txtEditor; private String filePath; private String fileName; private JLabel lblMsg = null; / 自动换行和状态栏 boolean flag = false; /* * Launch the application. */ public static void main(String args) EventQueue.invokeLater(new Runnable() public void run() try NotePadPlus frame = new NotePadPlus(); frame

7、.setVisible(true); catch (Exception e) e.printStackTrace(); ); /* * Create the frame. */ public NotePadPlus() addWindowListener(new WindowAdapter() Override public void windowClosing(WindowEvent e) frmMainWindowClosing(e); ); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 3

8、00); JMenuBar menuBar = new JMenuBar(); setJMenuBar(menuBar); JMenu menu = new JMenu(u6587u4EF6); menuBar.add(menu); JMenuItem miOpenFile = new JMenuItem(u6253u5F00u6587u4EF6); miOpenFile.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) openFileActionPerformed(e); );

9、 miOpenFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK); menu.add(miOpenFile); JMenuItem miSaveFile = new JMenuItem(u4FDDu5B58u6587u4EF6); miSaveFile.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) / 保存 saveFile(); ); miSaveFile.setAcc

10、elerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK); menu.add(miSaveFile); JMenuItem miSaveAs = new JMenuItem(u53E6u5B58u4E3A.); miSaveAs.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) saveAsActionPerformed(e); ); miSaveAs.setAccelerator(KeyStroke.

11、getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK | InputEvent.ALT_MASK); menu.add(miSaveAs); JMenuItem miExit = new JMenuItem(u9000u51FA); miExit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_E, InputEvent.CTRL_MASK); miExit.addActionListener(new ActionListener() public void actionPerformed(Acti

12、onEvent e) notePadPlusClosing(); ); menu.add(miExit); JMenu menu_1 = new JMenu(u7F16u8F91); menuBar.add(menu_1); JMenuItem miColor = new JMenuItem(u989Cu8272); miColor.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) colorAddActionPerformed(e); ); miColor.setAccelera

13、tor(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK | InputEvent.ALT_MASK); menu_1.add(miColor); JMenuItem miCopy = new JMenuItem(u62F7u8D1D); miCopy.addActionListener(new ActionListener() public void actionPerformed(ActionEvent arg0) txtEditor.copy(); ); miCopy.setAccelerator(KeyStroke.g

14、etKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK); menu_1.add(miCopy); JMenuItem miCut = new JMenuItem(u526Au5207); miCut.addActionListener(new ActionListener() public void actionPerformed(ActionEvent arg0) txtEditor.cut(); ); miCut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL

15、_MASK); menu_1.add(miCut); JMenuItem miPaste = new JMenuItem(u7C98u8D34); miPaste.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.paste(); ); miPaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK); menu_1.add(miPaste); contentPa

16、ne = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5); contentPane.setLayout(new BorderLayout(0, 0); setContentPane(contentPane); JScrollPane scrollPane = new JScrollPane(); contentPane.add(scrollPane, BorderLayout.CENTER); txtEditor = new JTextArea(); txtEditor.addKeyListener(new Key

17、Adapter() Override public void keyPressed(KeyEvent e) editorKeyPressed(e); ); / 文件改变事件 txtEditor.getDocument().addDocumentListener(new DocumentListener() public void changedUpdate(DocumentEvent e) flag = true; public void insertUpdate(DocumentEvent e) flag = true; public void removeUpdate(DocumentEv

18、ent e) flag = true; ); scrollPane.setViewportView(txtEditor); JPopupMenu popupMenu = new JPopupMenu(); addPopup(txtEditor, popupMenu); JMenuItem pmiCopy = new JMenuItem(u62F7u8D1D); pmiCopy.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.copy(); ); pmiCopy

19、.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK); popupMenu.add(pmiCopy); JMenuItem pmiCut = new JMenuItem(u526Au5207); pmiCut.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.cut(); ); pmiCut.setAccelerator(KeyStroke.getKeyStroke

20、(KeyEvent.VK_X, InputEvent.CTRL_MASK); popupMenu.add(pmiCut); JMenuItem pmiPaste = new JMenuItem(u7C98u8D34); pmiPaste.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.paste(); ); pmiPaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL

21、_MASK); popupMenu.add(pmiPaste); JToolBar tb_tools = new JToolBar(); scrollPane.setColumnHeaderView(tb_tools); JButton btnSave = new JButton(); btnSave.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) saveFile(); ); btnSave.setIcon(new ImageIcon(NotePadPlus.class.get

22、Resource(/images/save.png); tb_tools.add(btnSave); JButton btnCopy = new JButton(); btnCopy.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.copy(); ); btnCopy.setIcon(new ImageIcon(NotePadPlus.class.getResource(/images/copy.png); tb_tools.add(btnCopy); JBu

23、tton btnCut = new JButton(); btnCut.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) txtEditor.cut(); ); btnCut.setIcon(new ImageIcon(NotePadPlus.class.getResource(/images/cut.png); tb_tools.add(btnCut); JButton btnPaste = new JButton(); btnPaste.addActionListener(ne

24、w ActionListener() public void actionPerformed(ActionEvent e) txtEditor.paste(); ); btnPaste.setIcon(new ImageIcon(NotePadPlus.class.getResource(/images/paste.png); tb_tools.add(btnPaste); JToolBar tb_status = new JToolBar(); contentPane.add(tb_status, BorderLayout.SOUTH); lblMsg = new JLabel(u5F53u

25、524Du5B57u6570:0 u5F53u524Du884Cu6570:0); tb_status.add(lblMsg); if (fileName = null | fileName = ) this.setTitle(Untitled.txt); else this.setTitle(fileName); this.setLocationRelativeTo(null); this.setExtendedState(JFrame.MAXIMIZED_BOTH); protected void editorKeyPressed(KeyEvent e) / TODO Auto-gener

26、ated method stub lblMsg.setText(当前字数: + String.valueOf(txtEditor.getText().trim().length() + + 当前行数: + String.valueOf(txtEditor.getLineCount(); /* * 另存为 * * param e */ protected void saveAsActionPerformed(ActionEvent e) / TODO Auto-generated method stub JFileChooser dlg = new JFileChooser(); dlg.set

27、FileFilter(new TxtFileFilter(.txt, 文本文件(*.txt); int result = dlg.showSaveDialog(this); / 打开另存为文件对话框 if (result = JFileChooser.APPROVE_OPTION) File file = dlg.getSelectedFile(); / 设置编辑器标题显示成文件名 this.setTitle(file.getName(); this.filePath = file.getPath(); this.fileName = file.getName(); / 把文件的内容读到文本框

28、 FileWriter fw; try fw = new FileWriter(file); BufferedWriter bw = new BufferedWriter(fw); / 把文本框的内容全部写到文件 fw.write(txtEditor.getText(); bw.close(); fw.close(); catch (FileNotFoundException e1) / TODO Auto-generated catch block e1.printStackTrace(); catch (IOException e1) / TODO Auto-generated catch block e1.printStackTrace(); /* * 打开文件操作 * * param e */ protected void openFileActionPerformed(ActionEvent e) / TODO Auto-generated method stub JFileChooser dlg = new JFileChooser(); TxtFileFilter txtFileFilter = new TxtFileFilter(.txt, 文本文件(*.txt)