editdatadialog.java

功能简介： 1.增减学生对象（该对象包含学号、姓名、分数等信息） 2.登记、编辑分数 3.计算出平均成绩 4.统计出优秀（100-90）、良好（89-75）、中等（74-60）和不及格（59-

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class EditDataDialog extends JDialog {

	/**
	 * 编辑对话框的实现
	 */
	private static final long serialVersionUID = 1L;
	public EditDataDialog(MainFrame frame) {
		
		super(frame,"修改数据",true);
		this.frame = frame;
		initPanel();
		
		registerEventListener();
				
		Toolkit kit = Toolkit.getDefaultToolkit();
		Dimension screenSize = kit.getScreenSize();
		int x = (screenSize.width-500)/2;
		int y = (screenSize.height-250)/2;
		setLocation(x,y);
		
		getRootPane().setDefaultButton(btnCancle);
		setContentPane(mainPanel);
		textSID.setEditable(false);
		setSize(500,150);
	}
	
	public void initPanel(){
		inputPanel.add(sidLabel);
		inputPanel.add(textSID);
		inputPanel.add(nameLabel);
		inputPanel.add(textName);
		inputPanel.add(scoreLabel);
		inputPanel.add(textScore);
		buttonPanel.add(btnEdit);
		buttonPanel.add(btnCancle);
		mainPanel.setLayout(new BorderLayout(0,0));
		mainPanel.add(inputPanel,"Center");
		mainPanel.add(buttonPanel,"South");
	}
	
	public void registerEventListener(){
		btnEdit.addActionListener(new EditActionListener());
		btnCancle.addActionListener(new CancleActionListener());
	}
	
	private class EditActionListener implements ActionListener{
		public void actionPerformed(ActionEvent event){
			
			if(!dataCheck())//检验数据
				return;
			
			//修改原有Student的数据
			editStudent.setSName(name);
			editStudent.setScore(score);
			
			//继续后续操作...
			
			frame.updateList(ConnToAcc.UPDATE, sid, name, score);
			setVisible(false);
		}
	}
	
	private class CancleActionListener implements ActionListener{
		public void actionPerformed(ActionEvent event){
			setVisible(false);
		}
	}
	
	public void setEditStudent(Student editStudent){
		this.editStudent = editStudent;
	}
	
	public void setDataText(int sid, String name, float score){
		textSID.setText(Integer.toString(editStudent.getSID()));
		textName.setText(editStudent.getSName());
		textScore.setText(Float.toString(editStudent.getScore()));
	}
	
	private boolean dataCheck(){		
		try{
			score= Float.parseFloat(textScore.getText().trim());
		}
		catch(Exception e){
			score = -1;
			}
		if(textName.getText().length()>4 || textName.getText().length()<1){ 
			JOptionPane.showMessageDialog(null, "输入的数据不正确：姓名必须为2-4个汉字", "输入错误", 0);
			return false;
		}
		if(score<0 || score >100){
			JOptionPane.showMessageDialog(null, "输入的数据不正确：成绩必须为0-100的数字", "输入错误", 0);
			return false;
		}
		else {
			sid = editStudent.getSID();
			name = textName.getText();
			return true;
		}
	}

	private MainFrame frame;
	
	private JPanel mainPanel = new JPanel();
	private JPanel inputPanel = new JPanel();
	private	JPanel buttonPanel = new JPanel();
	
	private JLabel sidLabel = new JLabel("学号：");
	private JLabel nameLabel = new JLabel("姓名：");
	private JLabel scoreLabel = new JLabel("分数：");
	private JTextField textSID = new JTextField(8);
	private JTextField textName = new JTextField(8);
	private JTextField textScore = new JTextField(4);
	private JButton btnEdit = new JButton("修改");
	private JButton btnCancle = new JButton("取消");
	
	private Student editStudent;
	private int sid;
	private String name;
	private float score;
}