第十四周课程总结

简单记事本的实现
实验代码
package jishiben;

import java.awt.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.*;
import javax.swing.undo.UndoManager;

import org.graalvm.compiler.debug.Indent;

public class Jishiben implements ActionListener {

JFrame frame;
JTextArea text;
JScrollPane sp;
JMenuItem newItem,windomItem,openItem,saveItem,othersaveItem,pagesetupItem,printItem,closeItem;
JMenuBar bar;
JMenu fileMenu,editMenu,formatMenu,checkMenu,helpMenu;
JFileChooser choose;
File file;
JTable table;
JMenuItem blankItem;
UndoManager undoManager;

public void File() {
    
    frame=new JFrame("TMJ");
    text=new JTextArea();
    sp=new JScrollPane(text);
    bar=new JMenuBar();
    
    fileMenu=new JMenu("文件(F)");
    editMenu=new JMenu("编辑(E)");
    formatMenu=new JMenu("格式(O)");
    checkMenu=new JMenu("查看(V)");
    helpMenu=new JMenu("帮助(H)");
    

    newItem=new JMenuItem("新建(N)");
    windomItem=new JMenuItem("新窗口(W)");
    openItem=new JMenuItem("打开(O)");
    saveItem=new JMenuItem("保存(S)");
    othersaveItem=new JMenuItem("另存为(A)");
    pagesetupItem=new JMenuItem("页面设置(U)");
    printItem=new JMenuItem("打印(P)");
    closeItem=new JMenuItem("退出(X)");       
    

    newItem.setMnemonic('N');
    windomItem.setMnemonic('W');
    openItem.setMnemonic('O');
    saveItem.setMnemonic('S');
    othersaveItem.setMnemonic('A');
    pagesetupItem.setMnemonic('U');
    printItem.setMnemonic('P');
    closeItem.setMnemonic('X');
    
   

    newItem.setAccelerator(KeyStroke.getKeyStroke('N',KeyEvent.CTRL_DOWN_MASK));
    windomItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_DOWN_MASK|InputEvent.SHIFT_DOWN_MASK));
    openItem.setAccelerator(KeyStroke.getKeyStroke('O',KeyEvent.CTRL_DOWN_MASK));
    saveItem.setAccelerator(KeyStroke.getKeyStroke('S',KeyEvent.CTRL_DOWN_MASK));
    othersaveItem.setAccelerator(KeyStroke.getKeyStroke('S',KeyEvent.CTRL_DOWN_MASK|KeyEvent.SHIFT_DOWN_MASK));
    printItem.setAccelerator(KeyStroke.getKeyStroke('P',KeyEvent.CTRL_DOWN_MASK));
    
    

    bar.add(fileMenu);
    bar.add(editMenu);
    bar.add(formatMenu);
    bar.add(checkMenu);
    bar.add(helpMenu);
    
    
    frame.add(sp);
    frame.setJMenuBar(bar);
    frame.setSize(400,300);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    
    
}

public static void main(String[] args) {
    Jishiben shi=new Jishiben();
    shi.File();

}
public void actionPerformed(ActionEvent e){

    if(e.getSource()==newItem) {
        text.setText("");
    }else if(e.getSource()==windomItem) {
        Jishiben ben =new Jishiben();
        ben.File();
    }else if(e.getSource()==openItem) {
        choose=new JFileChooser();
        choose.showOpenDialog(null);
        file=choose.getSelectedFile();
        try {
            FileInputStream input=new FileInputStream(file);
            byte[] b=new byte[input.available()];
            input.read(b);
            text.append(new String(b));
            input.close();
            
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }else if(e.getSource()==othersaveItem) {
        choose=new JFileChooser();
        choose.showOpenDialog(null);
        file=choose.getSelectedFile();
        try {
            if(!file.exists()) {
              file.createNewFile();
            }
            FileOutputStream output=new FileOutputStream(file);
            byte[] b=text.getText().getBytes();
            output.write(b);
            output.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }else if(e.getSource()==saveItem) {
        choose=new JFileChooser();
        choose.showOpenDialog(null);
        file=choose.getSelectedFile();
        try {
            FileOutputStream output=new FileOutputStream(file);
            byte[] b=text.getText().getBytes();
            output.write(b);
            output.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }else if(e.getSource()==pagesetupItem) {
        
    }else if(e.getSource()==printItem) {
        
    }else if(e.getSource()==closeItem) {
        System.exit(1);
    }
}

}
运行截图

总结：本次实验是对前几周所学知识的一次综合实验，讲组件、窗口等充分利用整合起来；让我对之前一些不怎么理解的东西加深了印象/

JDBC总结：

讲了MySQL数据库的安装配置以及使用；如：增加数据（INSERT INTO 表名字[字段]VALUES),删除数据（DELETE FROM 表名称 [删除条件]），更新数据（UPDATE 表名称 SET 字段 [WHERE 更新条件]），