数据库大实验展示（中）

接上一篇~~

教师信息的删改查：

package com.artisan.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.List;
import java.util.Vector;

import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import com.artisan.dao.TeacherDao;
import com.artisan.model.Teacher;
import com.artisan.util.StringUtil;

public class ManageTeacherFrm extends JInternalFrame {
	private JTable teacherListTable;
	private JTextField searchTeacherNameTextField;
	private JTextField editTeacherNameTextField;
	private JTextField editTeacherTitleTextField;
	private JTextField editTeacherAgeTextField;
	private JPasswordField editTeacherPasswordField;
	private JRadioButton editTeacherSexManRadioButton;
	private JRadioButton editTeacherSexFemalRadioButton;
	private JButton deleteTeacherButton;
	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ManageTeacherFrm frame = new ManageTeacherFrm();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public ManageTeacherFrm() {
		setClosable(true);
		setIconifiable(true);
		setTitle("\u6559\u5E08\u4FE1\u606F\u7BA1\u7406");
		setBounds(100, 100, 805, 691);
		
		JScrollPane scrollPane = new JScrollPane();
		
		JLabel label = new JLabel("\u6559\u5E08\u59D3\u540D\uFF1A");
		label.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u8001\u5E08.png")));
		label.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		searchTeacherNameTextField = new JTextField();
		searchTeacherNameTextField.setColumns(10);
		
		JButton searchTeacherButton = new JButton("\u67E5\u8BE2");
		searchTeacherButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				searchTeacher(e);
			}
		});
		searchTeacherButton.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u641C\u7D22.png")));
		searchTeacherButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(UIManager.getBorder("TitledBorder.border"), "\u6559\u5E08\u4FE1\u606F\u4FEE\u6539", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING, false)
						.addGroup(Alignment.LEADING, groupLayout.createSequentialGroup()
							.addGap(178)
							.addComponent(label)
							.addGap(33)
							.addComponent(searchTeacherNameTextField, GroupLayout.PREFERRED_SIZE, 179, GroupLayout.PREFERRED_SIZE)
							.addGap(66)
							.addComponent(searchTeacherButton))
						.addGroup(Alignment.LEADING, groupLayout.createSequentialGroup()
							.addGap(92)
							.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)
								.addComponent(panel, Alignment.TRAILING, GroupLayout.DEFAULT_SIZE, 610, Short.MAX_VALUE)
								.addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 610, Short.MAX_VALUE))))
					.addContainerGap(92, Short.MAX_VALUE))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(33)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(searchTeacherNameTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label)
						.addComponent(searchTeacherButton))
					.addGap(18)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 323, GroupLayout.PREFERRED_SIZE)
					.addGap(29)
					.addComponent(panel, GroupLayout.PREFERRED_SIZE, 175, GroupLayout.PREFERRED_SIZE)
					.addContainerGap(56, Short.MAX_VALUE))
		);
		
		JLabel label_1 = new JLabel("\u6559\u5E08\u59D3\u540D\uFF1A");
		label_1.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u8001\u5E08.png")));
		label_1.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editTeacherNameTextField = new JTextField();
		editTeacherNameTextField.setColumns(10);
		
		JLabel label_2 = new JLabel("\u6559\u5E08\u6027\u522B\uFF1A");
		label_2.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u6027\u522B.png")));
		label_2.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		ButtonGroup buttonGroup = new ButtonGroup();
		editTeacherSexManRadioButton = new JRadioButton("\u7537");
		editTeacherSexManRadioButton.setSelected(true);
		
		editTeacherSexFemalRadioButton = new JRadioButton("\u5973");
		buttonGroup.add(editTeacherSexManRadioButton);
		buttonGroup.add(editTeacherSexFemalRadioButton);
		
		JLabel label_3 = new JLabel("\u6559\u5E08\u804C\u79F0\uFF1A");
		label_3.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u804C\u79F0\u8BC4\u5B9A.png")));
		label_3.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editTeacherTitleTextField = new JTextField();
		editTeacherTitleTextField.setColumns(10);
		
		JLabel label_4 = new JLabel("\u6559\u5E08\u5E74\u9F84\uFF1A");
		label_4.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u5E74\u9F84.png")));
		label_4.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editTeacherAgeTextField = new JTextField();
		editTeacherAgeTextField.setColumns(10);
		
		JLabel label_5 = new JLabel("\u767B\u5F55\u5BC6\u7801\uFF1A");
		label_5.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u5BC6\u7801.png")));
		label_5.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editTeacherPasswordField = new JPasswordField();
		
		JButton editTeacherSubmitButton = new JButton("\u786E\u8BA4\u4FEE\u6539");
		editTeacherSubmitButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				editTeacherAct(ae);
			}
		});
		editTeacherSubmitButton.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u786E\u8BA4.png")));
		editTeacherSubmitButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		deleteTeacherButton = new JButton("\u5220\u9664\u4FE1\u606F");
		deleteTeacherButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				deleteTeacher(ae);
			}
		});
		deleteTeacherButton.setIcon(new ImageIcon(ManageTeacherFrm.class.getResource("/images/\u5220\u9664.png")));
		deleteTeacherButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(24)
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(label_1)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(editTeacherNameTextField, GroupLayout.PREFERRED_SIZE, 122, GroupLayout.PREFERRED_SIZE))
						.addGroup(gl_panel.createSequentialGroup()
							.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
								.addComponent(label_3)
								.addComponent(label_5))
							.addPreferredGap(ComponentPlacement.RELATED)
							.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
								.addComponent(editTeacherPasswordField, GroupLayout.DEFAULT_SIZE, 122, Short.MAX_VALUE)
								.addComponent(editTeacherTitleTextField))))
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(gl_panel.createSequentialGroup()
							.addGap(27)
							.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_panel.createSequentialGroup()
									.addComponent(label_2)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(editTeacherSexManRadioButton)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(editTeacherSexFemalRadioButton))
								.addGroup(gl_panel.createSequentialGroup()
									.addComponent(label_4)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(editTeacherAgeTextField, GroupLayout.PREFERRED_SIZE, 100, GroupLayout.PREFERRED_SIZE))))
						.addGroup(gl_panel.createSequentialGroup()
							.addGap(39)
							.addComponent(editTeacherSubmitButton)
							.addGap(50)
							.addComponent(deleteTeacherButton)))
					.addGap(67))
		);
		gl_panel.setVerticalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addContainerGap()
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_1)
						.addComponent(editTeacherNameTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_2)
						.addComponent(editTeacherSexManRadioButton)
						.addComponent(editTeacherSexFemalRadioButton))
					.addPreferredGap(ComponentPlacement.RELATED, 37, Short.MAX_VALUE)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_3)
						.addComponent(editTeacherTitleTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_4)
						.addComponent(editTeacherAgeTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(29)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_5)
						.addComponent(editTeacherPasswordField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(editTeacherSubmitButton)
						.addComponent(deleteTeacherButton))
					.addGap(19))
		);
		panel.setLayout(gl_panel);
		
		teacherListTable = new JTable();
		teacherListTable.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				selectedTableRow(arg0);
			}
		});
		teacherListTable.setModel(new DefaultTableModel(
			new Object[][] {
			},
			new String[] {
				"\u6559\u5E08ID", "\u6559\u5E08\u59D3\u540D", "\u6559\u5E08\u6027\u522B", "\u6559\u5E08\u804C\u79F0", "\u6559\u5E08\u5E74\u9F84", "\u767B\u5F55\u5BC6\u7801"
			}
		) {
			boolean[] columnEditables = new boolean[] {
				false, false, false, false, false, false
			};
			public boolean isCellEditable(int row, int column) {
				return columnEditables[column];
			}
		});
		scrollPane.setViewportView(teacherListTable);
		getContentPane().setLayout(groupLayout);
		setTable(new Teacher());
		setAuthority();
	}
	protected void editTeacherAct(ActionEvent ae) {
		// TODO Auto-generated method stub
		int row = teacherListTable.getSelectedRow();
		if(row == -1){
			JOptionPane.showMessageDialog(this, "请选择要修改的数据！");
			return;
		}
		String teacherName = editTeacherNameTextField.getText().toString();
		String teacherSex = editTeacherSexManRadioButton.isSelected() ? editTeacherSexManRadioButton.getText().toString() : editTeacherSexFemalRadioButton.getText().toString();
		String teacherTitle = editTeacherTitleTextField.getText().toString();
		int teacherAge = 0;
		try {
			teacherAge = Integer.parseInt(editTeacherAgeTextField.getText().toString());
		} catch (Exception e) {
			// TODO: handle exception
			JOptionPane.showMessageDialog(this, "年龄只允许输入数字！");
			return;
		}
		String teacherPassword = editTeacherPasswordField.getText().toString();
		if(StringUtil.isEmpty(teacherName)){
			JOptionPane.showMessageDialog(this, "教师姓名必须填写！");
			return;
		}
		if(StringUtil.isEmpty(teacherTitle)){
			JOptionPane.showMessageDialog(this, "教师职称必须填写！");
			return;
		}
		if(teacherAge == 0 || teacherAge < 0){
			JOptionPane.showMessageDialog(this, "教师年龄必须大于0！");
			return;
		}
		if(StringUtil.isEmpty(teacherPassword)){
			JOptionPane.showMessageDialog(this, "教师登录密码必须填写！");
			return;
		}
		Teacher teacher = new Teacher();
		teacher.setId(Integer.parseInt(teacherListTable.getValueAt(row, 0).toString()));
		teacher.setName(teacherName);
		teacher.setSex(teacherSex);
		teacher.setTitle(teacherTitle);
		teacher.setAge(teacherAge);
		teacher.setPassword(teacherPassword);
		TeacherDao teacherDao = new TeacherDao();
		if(teacherDao.update(teacher)){
			JOptionPane.showMessageDialog(this, "修改成功！");
		}else{
			JOptionPane.showMessageDialog(this, "修改失败！");
		}
		teacherDao.closeDao();
		setTable(new Teacher());
	}

	protected void searchTeacher(ActionEvent e) {
		// TODO Auto-generated method stub
		String teacherNameString = searchTeacherNameTextField.getText().toString();
		Teacher teacher = new Teacher();
		teacher.setName(teacherNameString);
		setTable(teacher);
	}

	protected void deleteTeacher(ActionEvent ae) {
		// TODO Auto-generated method stub
		int row = teacherListTable.getSelectedRow();
		if(row == -1){
			JOptionPane.showMessageDialog(this, "请选择要删除的数据！");
			return;
		}
		if(JOptionPane.showConfirmDialog(this, "确定要删除么？") != JOptionPane.OK_OPTION)return;
		int id = Integer.parseInt(teacherListTable.getValueAt(row, 0).toString());
		TeacherDao teacherDao = new TeacherDao();
		if(teacherDao.delete(id)){
			JOptionPane.showMessageDialog(this, "删除成功！");
		}else{
			JOptionPane.showMessageDialog(this, "删除失败！");
		}
		teacherDao.closeDao();
		setTable(new Teacher());
	}

	private void setTable(Teacher teacher){
		if("教师".equals(MainFrm.userType.getName())){
			Teacher tLogined = (Teacher) MainFrm.userObject;
			teacher.setName(tLogined.getName());
			searchTeacherNameTextField.setText(teacher.getName());
		}
		DefaultTableModel dft = (DefaultTableModel) teacherListTable.getModel();
		dft.setRowCount(0);
		TeacherDao teacherDao = new TeacherDao();
		List teacherList = teacherDao.getTeacherList(teacher);
		for (Teacher t : teacherList) {
			Vector v = new Vector();
			v.add(t.getId());
			v.add(t.getName());
			v.add(t.getSex());
			v.add(t.getTitle());
			v.add(t.getAge());
			v.add(t.getPassword());
			dft.addRow(v);
		}
		teacherDao.closeDao();
	}
	protected void selectedTableRow(MouseEvent me) {
		// TODO Auto-generated method stub
		DefaultTableModel dft = (DefaultTableModel) teacherListTable.getModel();
		editTeacherNameTextField.setText(dft.getValueAt(teacherListTable.getSelectedRow(), 1).toString());
		editTeacherTitleTextField.setText(dft.getValueAt(teacherListTable.getSelectedRow(), 3).toString());
		editTeacherAgeTextField.setText(dft.getValueAt(teacherListTable.getSelectedRow(), 4).toString());
		editTeacherPasswordField.setText(dft.getValueAt(teacherListTable.getSelectedRow(), 5).toString());
		String sex = dft.getValueAt(teacherListTable.getSelectedRow(), 2).toString();
		if(sex.equals(editTeacherSexManRadioButton.getText()))editTeacherSexManRadioButton.setSelected(true);
		if(sex.equals(editTeacherSexFemalRadioButton.getText()))editTeacherSexFemalRadioButton.setSelected(true);
	}
	private void setAuthority(){
		if("教师".equals(MainFrm.userType.getName())){
			deleteTeacherButton.setEnabled(false);
			searchTeacherNameTextField.setEditable(false);
		}
	}
}

课程的删改查： 

package com.artisan.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import com.artisan.dao.CourseDao;
import com.artisan.dao.TeacherDao;
import com.artisan.model.Course;
import com.artisan.model.Teacher;
import com.artisan.util.StringUtil;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class ManageCourseFrm extends JInternalFrame {
	private JTextField searchCourseNameTextField;
	private JTable courseListTable;
	private JTextField editCourseTextField;
	private JTextField editCourseStudentNumTextField;
	private JComboBox editCourseTeachComboBox;
	private JTextArea editCourseInfoTextArea;
	private List teacherList = new ArrayList();
	private JComboBox searchTeacherComboBox;
	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ManageCourseFrm frame = new ManageCourseFrm();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public ManageCourseFrm() {
		setTitle("\u8BFE\u7A0B\u4FE1\u606F\u7BA1\u7406");
		setBounds(100, 100, 819, 704);
		setClosable(true);
		setIconifiable(true);
		JLabel label = new JLabel("\u8BFE\u7A0B\u540D\u79F0\uFF1A");
		label.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u8BFE\u7A0B.png")));
		label.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		searchCourseNameTextField = new JTextField();
		searchCourseNameTextField.setColumns(10);
		
		JLabel label_1 = new JLabel("\u6388\u8BFE\u8001\u5E08\uFF1A");
		label_1.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u8001\u5E08.png")));
		label_1.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		searchTeacherComboBox = new JComboBox();
		
		JButton searchButton = new JButton("\u67E5\u8BE2");
		searchButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				searchCourse(ae);
			}
		});
		searchButton.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u641C\u7D22.png")));
		searchButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JScrollPane scrollPane = new JScrollPane();
		
		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(null, "\u7F16\u8F91\u8BFE\u7A0B\u4FE1\u606F", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(81)
					.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING)
						.addComponent(panel, Alignment.LEADING, 0, 0, Short.MAX_VALUE)
						.addGroup(Alignment.LEADING, groupLayout.createParallelGroup(Alignment.TRAILING, false)
							.addComponent(scrollPane, Alignment.LEADING)
							.addGroup(Alignment.LEADING, groupLayout.createSequentialGroup()
								.addComponent(label)
								.addGap(18)
								.addComponent(searchCourseNameTextField, GroupLayout.PREFERRED_SIZE, 131, GroupLayout.PREFERRED_SIZE)
								.addGap(32)
								.addComponent(label_1)
								.addPreferredGap(ComponentPlacement.UNRELATED)
								.addComponent(searchTeacherComboBox, GroupLayout.PREFERRED_SIZE, 122, GroupLayout.PREFERRED_SIZE)
								.addGap(50)
								.addComponent(searchButton))))
					.addContainerGap(116, Short.MAX_VALUE))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(38)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(label)
						.addComponent(searchCourseNameTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_1)
						.addComponent(searchTeacherComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(searchButton))
					.addGap(41)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 266, GroupLayout.PREFERRED_SIZE)
					.addGap(35)
					.addComponent(panel, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
					.addContainerGap(31, Short.MAX_VALUE))
		);
		
		JLabel label_2 = new JLabel("\u8BFE\u7A0B\u540D\u79F0\uFF1A");
		label_2.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u8BFE\u7A0B.png")));
		label_2.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editCourseTextField = new JTextField();
		editCourseTextField.setColumns(10);
		
		JLabel label_3 = new JLabel("\u6388\u8BFE\u8001\u5E08\uFF1A");
		label_3.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u8001\u5E08.png")));
		label_3.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editCourseTeachComboBox = new JComboBox();
		
		JLabel label_4 = new JLabel("\u5B66\u751F\u4EBA\u6570\uFF1A");
		label_4.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u4EBA\u6570.png")));
		label_4.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editCourseStudentNumTextField = new JTextField();
		editCourseStudentNumTextField.setColumns(10);
		
		JLabel label_5 = new JLabel("\u8BFE\u7A0B\u4ECB\u7ECD\uFF1A");
		label_5.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u4ECB\u7ECD.png")));
		label_5.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editCourseInfoTextArea = new JTextArea();
		
		JButton submitEditButton = new JButton("\u786E\u8BA4\u4FEE\u6539");
		submitEditButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				editCourseSubmit(ae);
			}
		});
		submitEditButton.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u786E\u8BA4.png")));
		submitEditButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JButton deleteCourseButton = new JButton("\u5220\u9664\u8BFE\u7A0B");
		deleteCourseButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				deleteCourse(ae);
			}
		});
		deleteCourseButton.setIcon(new ImageIcon(ManageCourseFrm.class.getResource("/images/\u5220\u9664.png")));
		deleteCourseButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(37)
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING, false)
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(label_4)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(editCourseStudentNumTextField))
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(label_2)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(editCourseTextField, GroupLayout.PREFERRED_SIZE, 112, GroupLayout.PREFERRED_SIZE)))
					.addGap(18)
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(label_3)
							.addPreferredGap(ComponentPlacement.UNRELATED)
							.addComponent(editCourseTeachComboBox, GroupLayout.PREFERRED_SIZE, 153, GroupLayout.PREFERRED_SIZE))
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(label_5)
							.addGap(18)
							.addComponent(editCourseInfoTextArea)))
					.addContainerGap(118, Short.MAX_VALUE))
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(121)
					.addComponent(submitEditButton)
					.addGap(113)
					.addComponent(deleteCourseButton)
					.addContainerGap(160, Short.MAX_VALUE))
		);
		gl_panel.setVerticalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(27)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_2)
						.addComponent(editCourseTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_3)
						.addComponent(editCourseTeachComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(43)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_4)
						.addComponent(editCourseStudentNumTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_5)
						.addComponent(editCourseInfoTextArea, GroupLayout.PREFERRED_SIZE, 65, GroupLayout.PREFERRED_SIZE))
					.addGap(18)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(submitEditButton)
						.addComponent(deleteCourseButton))
					.addContainerGap(15, Short.MAX_VALUE))
		);
		panel.setLayout(gl_panel);
		
		courseListTable = new JTable();
		courseListTable.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent me) {
				selectedCourse(me);
			}
		});
		courseListTable.setModel(new DefaultTableModel(
			new Object[][] {
			},
			new String[] {
				"\u8BFE\u7A0B\u7F16\u53F7", "\u8BFE\u7A0B\u540D\u79F0", "\u6388\u8BFE\u8001\u5E08", "\u8BFE\u7A0B\u6700\u5927\u4EBA\u6570", "\u5DF2\u9009\u4EBA\u6570", "\u8BFE\u7A0B\u4ECB\u7ECD"
			}
		) {
			boolean[] columnEditables = new boolean[] {
				false, true, false, false, false, false
			};
			public boolean isCellEditable(int row, int column) {
				return columnEditables[column];
			}
		});
		courseListTable.getColumnModel().getColumn(3).setPreferredWidth(90);
		courseListTable.getColumnModel().getColumn(5).setPreferredWidth(225);
		scrollPane.setViewportView(courseListTable);
		getContentPane().setLayout(groupLayout);
		setTeacherCombox();
		setCourseListTable(new Course());
	}
	protected void editCourseSubmit(ActionEvent ae) {
		// TODO Auto-generated method stub
		int row = courseListTable.getSelectedRow();
		if(row == -1){
			JOptionPane.showMessageDialog(this, "请选中要修改的数据！");
			return;
		}
		int course_id = Integer.parseInt(courseListTable.getValueAt(row, 0).toString());
		Teacher teacher = (Teacher) editCourseTeachComboBox.getSelectedItem();
		String courseName = editCourseTextField.getText().toString();
		if(StringUtil.isEmpty(courseName)){
			JOptionPane.showMessageDialog(this, "课程名称不能为空！");
			return;
		}
		int max_student_num = 0;
		try {
			max_student_num = Integer.parseInt(editCourseStudentNumTextField.getText().toString());
		} catch (Exception e) {
			// TODO: handle exception
			JOptionPane.showMessageDialog(this, "学生人数请输入大于0的整数！");
			return;
		}
		if(max_student_num <= 0){
			JOptionPane.showMessageDialog(this, "学生人数请输入大于0的整数！");
			return;
		}
		String courseInfo = editCourseInfoTextArea.getText().toString();
		Course course = new Course();
		course.setId(course_id);
		course.setName(courseName);
		course.setTeacher_id(teacher.getId());
		course.setMax_student_num(max_student_num);
		course.setInfo(courseInfo);
		CourseDao courseDao = new CourseDao();
		if(courseDao.update(course)){
			JOptionPane.showMessageDialog(this, "修改成功！");
		}else{
			JOptionPane.showMessageDialog(this, "修改失败！");
		}
		courseDao.closeDao();
		setCourseListTable(new Course());
		
	}

	protected void selectedCourse(MouseEvent me) {
		// TODO Auto-generated method stub
		int row = courseListTable.getSelectedRow();
		String couseName = courseListTable.getValueAt(row, 1).toString();
		int teacher_id = getTeacherIdByName(courseListTable.getValueAt(row, 2).toString());
		int max_student_num = Integer.parseInt(courseListTable.getValueAt(row, 3).toString());
		String couseInfo = courseListTable.getValueAt(row, 5).toString();
		editCourseTextField.setText(couseName);
		editCourseStudentNumTextField.setText(max_student_num+"");
		editCourseInfoTextArea.setText(couseInfo);
		for(int i=0;i courseList = courseDao.getCourseList(course);
		DefaultTableModel dft = (DefaultTableModel) courseListTable.getModel();
		dft.setRowCount(0);
		for (Course c : courseList) {
			Vector v = new Vector();
			v.add(c.getId());
			v.add(c.getName());
			v.add(getTeacherNameById(c.getTeacher_id()));
			v.add(c.getMax_student_num());
			v.add(c.getSelected_num());
			v.add(c.getInfo());
			dft.addRow(v);
		}
		courseDao.closeDao();
	}
	private void setTeacherCombox(){
		TeacherDao teacherDao = new TeacherDao();
		teacherList = teacherDao.getTeacherList(new Teacher());
		teacherDao.closeDao();
		for (Teacher teacher : teacherList) {
			editCourseTeachComboBox.addItem(teacher);
			searchTeacherComboBox.addItem(teacher);
		}
	}
	private String getTeacherNameById(int teacher_id){
		String retString = "";
		for (Teacher teacher : teacherList) {
			if(teacher.getId() == teacher_id){
				retString = teacher.getName();
				break;
			}
		}
		return retString;
	}
	private int getTeacherIdByName(String teacher_name){
		int retId = -1;
		for (Teacher teacher : teacherList) {
			if(teacher_name.equals(teacher.getName())){
				retId = teacher.getId();
				break;
			}
		}
		return retId;
	}
}

登录界面：

package com.artisan.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultComboBoxModel;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.border.EmptyBorder;

import com.artisan.dao.AdminDao;
import com.artisan.dao.StudentDao;
import com.artisan.dao.TeacherDao;
import com.artisan.model.Admin;
import com.artisan.model.Student;
import com.artisan.model.Teacher;
import com.artisan.model.UserType;
import com.artisan.util.StringUtil;

public class LoginFrm extends JFrame {

	private JPanel contentPane;
	private JTextField userNameTextField;
	private JPasswordField passwordTextField;
	private JComboBox userTypeComboBox;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					LoginFrm frame = new LoginFrm();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public LoginFrm() {
		setTitle("\u767B\u9646\u754C\u9762");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 540, 379);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		setLocationRelativeTo(null);
		JLabel label = new JLabel("\u5B66\u751F\u4FE1\u606F\u7CFB\u7EDF\u767B\u9646\u754C\u9762");
		label.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/logo.png")));
		label.setFont(new Font("微软雅黑", Font.BOLD, 18));
		
		JLabel label_1 = new JLabel("\u7528\u6237\u540D\uFF1A");
		label_1.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/\u7528\u6237\u540D.png")));
		label_1.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		userNameTextField = new JTextField();
		userNameTextField.setColumns(10);
		
		JLabel label_2 = new JLabel("\u5BC6   \u7801\uFF1A");
		label_2.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		label_2.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/\u5BC6\u7801.png")));
		
		passwordTextField = new JPasswordField();
		passwordTextField.setColumns(10);
		
		JLabel label_3 = new JLabel("\u7528\u6237\u7C7B\u578B\uFF1A");
		label_3.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/userType.png")));
		label_3.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		userTypeComboBox = new JComboBox();
		userTypeComboBox.setModel(new DefaultComboBoxModel(new UserType[] {UserType.ADMIN, UserType.TEACHER, UserType.STUDENT}));
		userTypeComboBox.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JButton loginButton = new JButton("\u767B\u5F55");
		loginButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				loginAct(ae);
			}
		});
		loginButton.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/\u767B\u5F55.png")));
		loginButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JButton resetButton = new JButton("\u91CD\u7F6E");
		resetButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				restValue(ae);
			}
		});
		resetButton.setIcon(new ImageIcon(LoginFrm.class.getResource("/images/\u91CD\u7F6E.png")));
		resetButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		GroupLayout gl_contentPane = new GroupLayout(contentPane);
		gl_contentPane.setHorizontalGroup(
			gl_contentPane.createParallelGroup(Alignment.LEADING)
				.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()
					.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
						.addGroup(gl_contentPane.createSequentialGroup()
							.addContainerGap(118, Short.MAX_VALUE)
							.addComponent(label))
						.addGroup(Alignment.LEADING, gl_contentPane.createSequentialGroup()
							.addGap(134)
							.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_contentPane.createSequentialGroup()
									.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
										.addComponent(label_1)
										.addComponent(label_2))
									.addGap(18)
									.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
										.addComponent(passwordTextField, GroupLayout.DEFAULT_SIZE, 168, Short.MAX_VALUE)
										.addComponent(userNameTextField, GroupLayout.DEFAULT_SIZE, 182, Short.MAX_VALUE)))
								.addGroup(gl_contentPane.createSequentialGroup()
									.addComponent(label_3)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(userTypeComboBox, 0, 162, Short.MAX_VALUE)))))
					.addGap(116))
				.addGroup(gl_contentPane.createSequentialGroup()
					.addGap(156)
					.addComponent(loginButton)
					.addGap(61)
					.addComponent(resetButton)
					.addContainerGap(127, Short.MAX_VALUE))
		);
		gl_contentPane.setVerticalGroup(
			gl_contentPane.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_contentPane.createSequentialGroup()
					.addGap(26)
					.addComponent(label)
					.addGap(33)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_1)
						.addComponent(userNameTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(28)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_2)
						.addComponent(passwordTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(36)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_3)
						.addComponent(userTypeComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addPreferredGap(ComponentPlacement.RELATED, 29, Short.MAX_VALUE)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(resetButton)
						.addComponent(loginButton))
					.addGap(22))
		);
		contentPane.setLayout(gl_contentPane);
	}

	protected void loginAct(ActionEvent ae) {
		// TODO Auto-generated method stub
		String userName = userNameTextField.getText().toString();
		String password = passwordTextField.getText().toString();
		UserType selectedItem = (UserType)userTypeComboBox.getSelectedItem();
		if(StringUtil.isEmpty(userName)){
			JOptionPane.showMessageDialog(this, "用户名不能为空！");
			return;
		}
		if(StringUtil.isEmpty(password)){
			JOptionPane.showMessageDialog(this, "密码不能为空！");
			return;
		}
		Admin admin = null;
		if("系统管理员".equals(selectedItem.getName())){
			AdminDao adminDao = new AdminDao();
			Admin adminTmp = new Admin();
			adminTmp.setName(userName);
			adminTmp.setPassword(password);
			admin = adminDao.login(adminTmp);
			adminDao.closeDao();
			if(admin == null){
				JOptionPane.showMessageDialog(this, "用户名或密码错误！");
				return;
			}
			JOptionPane.showMessageDialog(this, "欢迎【"+selectedItem.getName()+"】："+admin.getName()+"登录本系统！");
			this.dispose();
			new MainFrm(selectedItem, admin).setVisible(true);
		}else if("教师".equals(selectedItem.getName())){
			//教师登录
			Teacher teacher = null;
			TeacherDao teacherDao = new TeacherDao();
			Teacher teacherTmp = new Teacher();
			teacherTmp.setName(userName);
			teacherTmp.setPassword(password);
			teacher = teacherDao.login(teacherTmp);
			teacherDao.closeDao();
			if(teacher == null){
				JOptionPane.showMessageDialog(this, "用户名或密码错误！");
				return;
			}
			JOptionPane.showMessageDialog(this, "欢迎【"+selectedItem.getName()+"】："+teacher.getName()+"登录本系统！");
			this.dispose();
			new MainFrm(selectedItem, teacher).setVisible(true);
		}else{
			//学生登录
			Student student = null; 
			StudentDao studentDao = new StudentDao();
			Student studentTmp = new Student();
			studentTmp.setName(userName);
			studentTmp.setPassword(password);
			student = studentDao.login(studentTmp);
			studentDao.closeDao();
			if(student == null){
				JOptionPane.showMessageDialog(this, "用户名或密码错误！");
				return;
			}
			JOptionPane.showMessageDialog(this, "欢迎【"+selectedItem.getName()+"】："+student.getName()+"登录本系统！");
			this.dispose();
			new MainFrm(selectedItem, student).setVisible(true);
		}
	}

	protected void restValue(ActionEvent ae) {
		// TODO Auto-generated method stub
		userNameTextField.setText("");
		passwordTextField.setText("");
		userTypeComboBox.setSelectedIndex(0);
	}
}

选课的增删改查：

package com.artisan.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import com.artisan.dao.CourseDao;
import com.artisan.dao.SelectedCourseDao;
import com.artisan.dao.StudentDao;
import com.artisan.model.Course;
import com.artisan.model.SelectedCourse;
import com.artisan.model.Student;

public class ManageSelectedCourseFrm extends JInternalFrame {
	private JTable selectedCourseListTable;
	private JComboBox searchCourseComboBox;
	private JComboBox searchStudentComboBox;
	private JComboBox editSelectedStudentComboBox;
	private JComboBox editSelectedCourseComboBox;
	private List studentList = new ArrayList();
	private List courseList = new ArrayList();
	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ManageSelectedCourseFrm frame = new ManageSelectedCourseFrm();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public ManageSelectedCourseFrm() {
		setClosable(true);
		setIconifiable(true);
		setTitle("\u9009\u8BFE\u7BA1\u7406");
		setBounds(100, 100, 669, 562);
		
		JLabel label = new JLabel("\u5B66\u751F\uFF1A");
		label.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u5B66\u751F\u7BA1\u7406.png")));
		label.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		searchStudentComboBox = new JComboBox();
		searchStudentComboBox.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent ie) {
				studentChangeAct(ie);
			}
		});
		
		JLabel label_1 = new JLabel("\u8BFE\u7A0B\uFF1A");
		label_1.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u65B0\u4EBA\u8BFE\u7A0B.png")));
		label_1.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		searchCourseComboBox = new JComboBox();
		
		JButton confirmSelectedButton = new JButton("\u786E\u8BA4\u9009\u8BFE");
		confirmSelectedButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				confirmSelectedCourse(ae);
			}
		});
		confirmSelectedButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		confirmSelectedButton.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u786E\u8BA4.png")));
		
		JScrollPane scrollPane = new JScrollPane();
		
		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(null, "\u4FEE\u6539\u9009\u8BFE", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.TRAILING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(46)
					.addComponent(label)
					.addGap(2)
					.addComponent(searchStudentComboBox, GroupLayout.PREFERRED_SIZE, 124, GroupLayout.PREFERRED_SIZE)
					.addGap(20)
					.addComponent(label_1)
					.addGap(12)
					.addComponent(searchCourseComboBox, GroupLayout.PREFERRED_SIZE, 127, GroupLayout.PREFERRED_SIZE)
					.addGap(36)
					.addComponent(confirmSelectedButton)
					.addContainerGap(49, Short.MAX_VALUE))
				.addGroup(groupLayout.createSequentialGroup()
					.addContainerGap(81, Short.MAX_VALUE)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 493, GroupLayout.PREFERRED_SIZE)
					.addGap(77))
				.addGroup(Alignment.LEADING, groupLayout.createSequentialGroup()
					.addGap(75)
					.addComponent(panel, GroupLayout.PREFERRED_SIZE, 500, GroupLayout.PREFERRED_SIZE)
					.addContainerGap(78, Short.MAX_VALUE))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(36)
							.addComponent(label))
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(34)
							.addComponent(searchStudentComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(34)
							.addComponent(label_1))
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(33)
							.addComponent(searchCourseComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(32)
							.addComponent(confirmSelectedButton)))
					.addGap(47)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 216, GroupLayout.PREFERRED_SIZE)
					.addGap(31)
					.addComponent(panel, GroupLayout.PREFERRED_SIZE, 144, GroupLayout.PREFERRED_SIZE)
					.addContainerGap(35, Short.MAX_VALUE))
		);
		
		selectedCourseListTable = new JTable();
		selectedCourseListTable.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent me) {
				selectedCourse(me);
			}
		});
		selectedCourseListTable.setModel(new DefaultTableModel(
			new Object[][] {
			},
			new String[] {
				"\u9009\u8BFE\u7F16\u53F7", "\u5B66\u751F\u59D3\u540D", "\u8BFE\u7A0B\u540D\u79F0"
			}
		) {
			boolean[] columnEditables = new boolean[] {
				false, false, false
			};
			public boolean isCellEditable(int row, int column) {
				return columnEditables[column];
			}
		});
		scrollPane.setViewportView(selectedCourseListTable);
		
		JLabel label_2 = new JLabel("\u5B66\u751F\uFF1A");
		label_2.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u5B66\u751F\u7BA1\u7406.png")));
		label_2.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editSelectedStudentComboBox = new JComboBox();
		
		JLabel label_3 = new JLabel("\u8BFE\u7A0B\uFF1A");
		label_3.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u65B0\u4EBA\u8BFE\u7A0B.png")));
		label_3.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		editSelectedCourseComboBox = new JComboBox();
		
		JButton confirmEditButton = new JButton("\u786E\u8BA4\u4FEE\u6539");
		confirmEditButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				editSelectCourseAct(ae);
			}
		});
		confirmEditButton.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u786E\u8BA4.png")));
		confirmEditButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		
		JButton deleteCourseButton = new JButton("\u9000\u9009\u8BFE\u7A0B");
		deleteCourseButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				deleteSelectedCourse(ae);
			}
		});
		deleteCourseButton.setFont(new Font("微软雅黑", Font.PLAIN, 14));
		deleteCourseButton.setIcon(new ImageIcon(ManageSelectedCourseFrm.class.getResource("/images/\u5220\u9664.png")));
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(gl_panel.createSequentialGroup()
							.addContainerGap()
							.addComponent(label_2)
							.addGap(18)
							.addComponent(editSelectedStudentComboBox, GroupLayout.PREFERRED_SIZE, 127, GroupLayout.PREFERRED_SIZE))
						.addGroup(gl_panel.createSequentialGroup()
							.addGap(75)
							.addComponent(confirmEditButton)))
					.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(gl_panel.createSequentialGroup()
							.addGap(39)
							.addComponent(label_3)
							.addGap(18)
							.addComponent(editSelectedCourseComboBox, 0, 140, Short.MAX_VALUE))
						.addGroup(gl_panel.createSequentialGroup()
							.addGap(65)
							.addComponent(deleteCourseButton)))
					.addContainerGap())
		);
		gl_panel.setVerticalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addContainerGap()
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_2)
						.addComponent(editSelectedStudentComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_3)
						.addComponent(editSelectedCourseComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addPreferredGap(ComponentPlacement.RELATED, 52, Short.MAX_VALUE)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(confirmEditButton)
						.addComponent(deleteCourseButton))
					.addContainerGap())
		);
		panel.setLayout(gl_panel);
		getContentPane().setLayout(groupLayout);
		setStudentCombox();
		setCourseCombox();
		initTable();
		setAuthority();
	}
	protected void deleteSelectedCourse(ActionEvent ae) {
		// TODO Auto-generated method stub
		int row = selectedCourseListTable.getSelectedRow();
		if(row == -1){
			JOptionPane.showMessageDialog(this, "请选择要修改的数据！");
			return;
		}
		int selected_id = Integer.parseInt(selectedCourseListTable.getValueAt(row, 0).toString());
		String courseName = selectedCourseListTable.getValueAt(row, 2).toString();
		SelectedCourse sc = new SelectedCourse();
		sc.setId(selected_id);
		SelectedCourseDao scDao = new SelectedCourseDao();
		CourseDao courseDao = new CourseDao();
		if(scDao.delete(selected_id)){
			if(courseDao.updateSelectedNum(getCourseIdByName(courseName), -1)){
				JOptionPane.showMessageDialog(this, "退课成功！");
			}else{
				JOptionPane.showMessageDialog(this, "退课成功，更新课程信息失败！");
			}
		}else{
			JOptionPane.showMessageDialog(this, "退课失败！");
		}
		scDao.closeDao();
		courseDao.closeDao();
		initTable();
	}

	protected void editSelectCourseAct(ActionEvent ae) {
		// TODO Auto-generated method stub
		int row = selectedCourseListTable.getSelectedRow();
		if(row == -1){
			JOptionPane.showMessageDialog(this, "请选择要修改的数据！");
			return;
		}
		int selected_id = Integer.parseInt(selectedCourseListTable.getValueAt(row, 0).toString());
		String studentName = selectedCourseListTable.getValueAt(row, 1).toString();
		String courseName = selectedCourseListTable.getValueAt(row, 2).toString();
		Student student = (Student) editSelectedStudentComboBox.getSelectedItem();
		Course course = (Course) editSelectedCourseComboBox.getSelectedItem();
		if(studentName.equals(student.getName())&&courseName.equals(course.getName())){
			JOptionPane.showMessageDialog(this, "还未修改数据！");
			return;
		}
		CourseDao courseDao = new CourseDao();
		if(!courseDao.selectedEnable(course.getId())){
			JOptionPane.showMessageDialog(this, "该课程已经选满，不能再选!");
			return;
		}
		
		SelectedCourse sc = new SelectedCourse();
		sc.setId(selected_id);
		sc.setStudent_id(student.getId());
		sc.setCourse_id(course.getId());
		SelectedCourseDao scDao = new SelectedCourseDao();
		if(scDao.isSelected(sc)){
			JOptionPane.showMessageDialog(this, "已经选过这门课程了，不能再选!");
			return;
		}
		if(scDao.updateSelectedCourse(sc)){
			if(courseDao.updateSelectedNum(sc.getCourse_id(),1)){
				if(courseDao.updateSelectedNum(getCourseIdByName(courseName), -1)){
					JOptionPane.showMessageDialog(this, "修改成功！!");
				}
			}else{
				JOptionPane.showMessageDialog(this, "修改成功，课程信息更新失败!");
			}
		}
		courseDao.closeDao();
		scDao.closeDao();
		initTable();
	}

	protected void selectedCourse(MouseEvent me) {
		// TODO Auto-generated method stub
		int row = selectedCourseListTable.getSelectedRow();
		String studentName = selectedCourseListTable.getValueAt(row, 1).toString();
		String courseName = selectedCourseListTable.getValueAt(row, 2).toString();
		for (int i = 0; i < editSelectedStudentComboBox.getItemCount();i++) {
			Student student = (Student) editSelectedStudentComboBox.getItemAt(i);
			if(studentName.equals(student.getName())){
				editSelectedStudentComboBox.setSelectedIndex(i);
				break;
			}
		}
		for (int i = 0; i < editSelectedCourseComboBox.getItemCount();i++) {
			Course course = (Course) editSelectedCourseComboBox.getItemAt(i);
			if(courseName.equals(course.getName())){
				editSelectedCourseComboBox.setSelectedIndex(i);
				break;
			}
		}
	}

	protected void studentChangeAct(ItemEvent ie) {
		// TODO Auto-generated method stub
		if(ie.getStateChange() == ItemEvent.SELECTED){
			initTable();
		}
		//JOptionPane.showMessageDialog(this, ie.getStateChange());
	}

	protected void confirmSelectedCourse(ActionEvent ae) {
		// TODO Auto-generated method stub
		Student sstudent = (Student) searchStudentComboBox.getSelectedItem();
		Course scourse = (Course) searchCourseComboBox.getSelectedItem();
		SelectedCourse sc = new SelectedCourse();
		sc.setStudent_id(sstudent.getId());
		sc.setCourse_id(scourse.getId());
		CourseDao courseDao = new CourseDao();
		if(!courseDao.selectedEnable(scourse.getId())){
			JOptionPane.showMessageDialog(this, "该课程已经选满，不能再选!");
			return;
		}
		SelectedCourseDao scDao = new SelectedCourseDao();
		if(scDao.isSelected(sc)){
			JOptionPane.showMessageDialog(this, "已经选过这门课程了，不能再选!");
			return;
		}
		if(scDao.addSelectedCourse(sc)){
			if(courseDao.updateSelectedNum(sc.getCourse_id(),1)){
				JOptionPane.showMessageDialog(this, "选课成功！!");
			}else{
				JOptionPane.showMessageDialog(this, "选课成功，课程信息更新失败!");
			}
		}else{
			JOptionPane.showMessageDialog(this, "选课失败!");
		}
		courseDao.closeDao();
		scDao.closeDao();
		initTable();
	}

	private void setStudentCombox(){
		StudentDao studentDao = new StudentDao();
		studentList = studentDao.getStudentList(new Student());
		studentDao.closeDao();
		for (Student student : studentList) {
			searchStudentComboBox.addItem(student);
			editSelectedStudentComboBox.addItem(student);
		}
		if("学生".equals(MainFrm.userType.getName())){
			Student user = (Student) MainFrm.userObject;
			for(int i = 0; i < searchStudentComboBox.getItemCount();i++){
				Student student = (Student) searchStudentComboBox.getItemAt(i);
				if(student.getId() == user.getId()){
					searchStudentComboBox.setSelectedIndex(i);
					editSelectedStudentComboBox.setSelectedIndex(i);
					break;
				}
			}
		}
	}
	private void setCourseCombox(){
		CourseDao courseDao = new CourseDao();
		courseList = courseDao.getCourseList(new Course());
		courseDao.closeDao();
		for (Course course : courseList) {
			searchCourseComboBox.addItem(course);
			editSelectedCourseComboBox.addItem(course);
		}
	}
	private void getSelectedCourse(SelectedCourse selectedCourse){
		SelectedCourseDao selectedCourseDao = new SelectedCourseDao();
		List selectedCourseList = selectedCourseDao.getSelectedCourseList(selectedCourse);
		DefaultTableModel dft = (DefaultTableModel) selectedCourseListTable.getModel();
		dft.setRowCount(0);
		for (SelectedCourse sc : selectedCourseList) {
			Vector v = new Vector();
			v.add(sc.getId());
			v.add(getStudentNameById(sc.getStudent_id()));
			v.add(getCourseNameById(sc.getCourse_id()));
			dft.addRow(v);
		}
		selectedCourseDao.closeDao();
	}
	private void initTable(){
		Student student = (Student) searchStudentComboBox.getSelectedItem();
		SelectedCourse sc = new SelectedCourse();
		sc.setStudent_id(student.getId());
		getSelectedCourse(sc);
	}
	private String getStudentNameById(int id){
		for (int i = 0; i < studentList.size(); i++) {
			if(studentList.get(i).getId() == id)return studentList.get(i).getName();
		}
		return "";
	}
	private String getCourseNameById(int id){
		for (int i = 0; i < courseList.size(); i++) {
			if(id == courseList.get(i).getId())return courseList.get(i).getName();
		}
		return "";
	}
	private int getCourseIdByName(String name){
		for (int i = 0; i < courseList.size(); i++) {
			if(name.equals(courseList.get(i).getName()))return courseList.get(i).getId();
		}
		return 0;
	}
	private void setAuthority(){
		if("学生".equals(MainFrm.userType.getName())){
			searchStudentComboBox.setEnabled(false);
			editSelectedStudentComboBox.setEnabled(false);
		}
	}
}

见下一篇哦~