package vacc;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.filechooser.FileNameExtensionFilter;
public class TestNotepad {
private JFrame jframe;// 主窗体
JPanel jpanel;// 面板
JMenuBar jmenuBar = new JMenuBar();// 菜单面板
JMenu jmenuFile, jmenuEdit;// 主菜单
JMenuItem jmenuItemOpen, jmenuItemNew, jmenuItemSave, jmenuItemSaveAs,
jmenuItemExit;// 菜单中的子菜单
JTextArea jtextArea;// 文本框
JScrollPane jscrollPane;// 带滑动条的
JFileChooser jfileChooser;//文件选择器
File currentFile;
public TestNotepad() {
// TODO Auto-generated constructor stub
jframe = new JFrame("我的记事本");
jpanel = new JPanel();
jmenuBar = new JMenuBar();
jtextArea = new JTextArea();
jtextArea.setLineWrap(true);//设置自动换行
jscrollPane = new JScrollPane(jtextArea);
jfileChooser = new JFileChooser();
jfileChooser.setFileFilter(new FileNameExtensionFilter("文本文件(*.txt)", "txt"));
jmenuFile = new JMenu("文件(F)");
jmenuFile.setMnemonic('F');
jmenuEdit = new JMenu("编辑(E)");
jmenuEdit.setMnemonic('E');
jmenuItemNew = new JMenuItem("新建(N)", 'N');
jmenuItemNew.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_DOWN_MASK));
jmenuItemOpen = new JMenuItem("打开(O)", 'O');
jmenuItemOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_DOWN_MASK));
jmenuItemOpen.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
int res = jfileChooser.showOpenDialog(jframe);
if(res == jfileChooser.APPROVE_OPTION) {
currentFile = jfileChooser.getSelectedFile();
jtextArea.setText("");
openFile(currentFile);
jframe.setTitle(currentFile + "-记事本");
System.out.println("s");
}
}
});
jmenuItemSave = new JMenuItem("保存(S)", 'S');
jmenuItemSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_DOWN_MASK));
jmenuItemSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
saveFile();
}
});
jmenuItemSaveAs = new JMenuItem("另存为(A)", 'A');
jmenuItemSaveAs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
int res = jfileChooser.showSaveDialog(jframe);
if(res == jfileChooser.APPROVE_OPTION) {
currentFile = jfileChooser.getSelectedFile();
jframe.setTitle(currentFile + "-记事本");
saveFileAs(currentFile, jtextArea.getText().replaceAll("\n", "\r\n"));
}
}
});
jmenuBar.add(jmenuFile);
jmenuBar.add(jmenuEdit);
jmenuFile.add(jmenuItemNew);
jmenuFile.add(jmenuItemOpen);
jmenuFile.add(jmenuItemSave);
jmenuFile.add(jmenuItemSaveAs);
jpanel.setLayout(new BorderLayout(2, 1));
jpanel.add(jmenuBar, "North");
jpanel.add(jscrollPane, "Center");
jframe.add(jpanel);
jframe.setSize(500, 500);
jframe.setLocationRelativeTo(null);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setVisible(true);
}
public void saveFile() {
if(currentFile == null) {
int res = jfileChooser.showSaveDialog(jframe);
if(res == jfileChooser.APPROVE_OPTION) {
currentFile = jfileChooser.getSelectedFile();
jframe.setTitle(currentFile + "-记事本");
}
}
if(currentFile != null) {
saveFileAs(currentFile, jtextArea.getText().replaceAll("\n", "\r\n"));
}
}
public void saveFileAs(File file, String text) {
PrintWriter pw = null;
try {
pw = new PrintWriter(file);
pw.write(text);
pw.flush();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if(pw != null) {
pw.close();
}
}
}
public void openFile(File file) {
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(file));
String str = br.readLine();
while (str != null) {
jtextArea.append(str + "\n");
System.out.println(str);
str = br.readLine();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if(br != null) {
br.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void main(String[] args) {
new TestNotepad();
}
}
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315
6KB
2015-08-13
16
