第十四周课程总结&实验报告（简单记事本的实现）

实验报告（简单记事本的实现）

• 源代码

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.*;

import javax.swing.*;

public class TextPad implements ActionListener{
    JFrame frame;
    JTextArea jta;
    File file1;
    JMenuBar menubar;
    JMenu menu;
    JMenuItem newitem;
    JMenuItem openitem;
    JMenuItem closeitem;
    JMenuItem saveitem;
    JScrollPane scroll;
    JFileChooser jfc;
    public TextPad() {
        frame=new JFrame("记事本");
        jta=new JTextArea(10,4);
        jta.setEditable(true);
        scroll=new JScrollPane(jta,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
public Test() {
        frame =new JFrame("记事本");
        bar =new JMenuBar();
        fileMenu =new JMenu("文件");
        editMenu =new JMenu("编辑");
        newIcon = new ImageIcon("d:" + File.separator + "test" + File.separator +"新建.png");
        openIcon = new ImageIcon("d:" + File.separator + "test" + File.separator +"打开.png");
        saveIcon = new ImageIcon("d:" + File.separator + "test" + File.separator +"保存.png");
        closeIcon = new ImageIcon("d:" + File.separator + "test" + File.separator +"关闭.png");
        area =new JTextArea();
        scroll =new JScrollPane(area);
        
        newItem =new JMenuItem("新窗口(N)",newIcon);
        openItem =new JMenuItem("打开(O)",openIcon);
        saveItem =new JMenuItem("保存(S)",saveIcon);
        closeItem =new JMenuItem("关闭(X)",closeIcon);
        anothersaveItem=new JMenuItem("另存为(A)",saveIcon);
        fnewItem =new JMenuItem("新建(N)");
        
        //监听器
        fnewItem.addActionListener(this);
        newItem.addActionListener(this);
        openItem.addActionListener(this);
        saveItem.addActionListener(this);
        closeItem.addActionListener(this);
        anothersaveItem.addActionListener(this);
        
        fileMenu.add(newItem);
        fileMenu.add(openItem);
        fileMenu.add(saveItem);
        fileMenu.add(closeItem);
        fileMenu.add(fnewItem);
        fileMenu.add(anothersaveItem);
        fileMenu.addSeparator();
//快捷键
        
        fileMenu.setMnemonic(KeyEvent.VK_N);
        newItem.setMnemonic(KeyEvent.VK_N);
        openItem.setMnemonic(KeyEvent.VK_O);
        saveItem.setMnemonic(KeyEvent.VK_S);
        anothersaveItem.setMnemonic(KeyEvent.VK_A);
        closeItem.setMnemonic(KeyEvent.VK_C);
        fnewItem.setAccelerator(KeyStroke.getKeyStroke('N',java.awt.Event.CTRL_MASK));
        newItem.setAccelerator(KeyStroke.getKeyStroke('N',java.awt.Event.CTRL_MASK|InputEvent.SHIFT_MASK));
        openItem.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK));
        saveItem.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.Event.CTRL_MASK));
        anothersaveItem.setAccelerator(KeyStroke.getKeyStroke('A',java.awt.Event.CTRL_MASK));
        closeItem.setAccelerator(KeyStroke.getKeyStroke('X',java.awt.Event.CTRL_MASK));
        
        bar.add(fileMenu);
        bar.add(editMenu);
        

        frame.setJMenuBar(bar);
        frame.add(scroll);
        frame.setSize(600,500);
        frame.setVisible(true);
    }
    public void actionPerformed(ActionEvent event) {
        Object obj=event.getSource();
        if(obj instanceof JMenuItem) {
            JMenuItem item=(JMenuItem) obj;
        //新建窗口
            if(item==newItem) {
                new Test();
            }
        //  打开文本
            else if(item == openItem){
                chooser=new JFileChooser();
                chooser.showOpenDialog(null);
                file = chooser.getSelectedFile();
                try {
                    FileInputStream fis=new FileInputStream(file);
                    byte[] b=new byte[fis.available()];
                    fis.read(b);
                    area.append(new String(b));
                    fis.close();
                }catch(FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }//保存
//          else if(item == saveItem) {
//              chooser=new JFileChooser();
//              chooser.showSaveDialog(.this);
//          }
            //文件另存为
            else if(item ==anothersaveItem) {
                chooser=new JFileChooser();
                chooser.showSaveDialog(null);
                file = chooser.getSelectedFile();
                try {
                    if(!file.exists()) {
                        file.createNewFile();
                    }
                    FileOutputStream fos=new FileOutputStream(file);
                    byte[] b = area.getText().getBytes();
                    fos.write(b);
                    fos.close();
                }catch(IOException c) {
                    c.printStackTrace();
                }
            }else if(item== closeItem) {
                System.exit(1);
            }
        }   
    }   
}

• 1、JDBC概述
  JDBC提供了一种与平台无关的用于执行SQL语句的标准JavaAPI，可以方便的实现多种关系型数据库的统一操作，它由一组用Java语言编写的类和接口组成
  2.JDBC驱动程序分为四类：
  1）JDBC-ODBC桥驱动；
  2）JDBA本地驱动；
  3）JDBC网络驱动；
  4）本地协议纯JDBC驱动；