etitle.java

JAVA实现的酒店管理系统

package file1;

/*
 * 功能描述:所有对员工职称的操作的入口
 * @Author:黄顺武
 * Time:---
 * Last Modified:2007-12-15
 * Modify Reason:数据库连接类DBConnection 的内部结构设计得到优化
 */
import java.sql.*;
import javax.swing.*;
import sun.jdbc.rowset.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class ETitle extends JPanel implements ActionListener {

	private JLabel title = new JLabel("职称:");
	private JLabel salary = new JLabel("月薪:");
	private JLabel type = new JLabel("奖金派发方式:");
	private JLabel money = new JLabel("每次派发奖金额:");
	private JTextField titleTF = new JTextField(10);
	private JTextField salaryTF = new JTextField(10);
	private JTextField typeTF = new JTextField(10);
	private JTextField moneyTF = new JTextField(10);
	private JPanel p1 = new JPanel();
	private JTable recordTable = new JTable();
	private String[] head = { "职称", "月薪", "奖金派发方式", "每次派发奖金额" };
	private int headNum = 0;
	private String tableData[][] = null;
	private JScrollPane recScrollPane;
	private JPanel p3 = new JPanel();
	private JButton add = new JButton("增加记录");
	private JButton delete = new JButton("删除记录");
	private String[] eTitles = null;

	public ETitle() {
		titleTF.setBorder(null);
		moneyTF.setBorder(null);
		salaryTF.setBorder(null);
		typeTF.setBorder(null);
		headNum = head.length;
		this.setLayout(new BorderLayout(0, 5));
		p1.setLayout(new FlowLayout(FlowLayout.CENTER, 15, 5));
		p1.add(title);
		p1.add(titleTF);
		p1.add(salary);
		p1.add(salaryTF);
		p1.add(type);
		p1.add(typeTF);
		p1.add(money);
		p1.add(moneyTF);
		p3.setLayout(new FlowLayout(FlowLayout.CENTER, 15, 5));
		add.setBorder(null);
		add.setBackground(Color.LIGHT_GRAY);
		delete.setBorder(null);
		delete.setBackground(Color.LIGHT_GRAY);
		p3.add(add);
		p3.add(delete);
		doIt();
		add.addActionListener(this);
		delete.addActionListener(this);
	}

	private void doIt() {// 返回1表示没有记录或查询出错，返回0表示非前面两种情况
		try {
			DBConnection con = new DBConnection();
			String sql = "select* from Head";
			CachedRowSet crs = con.getResultSet(sql);
			int count = 0;
			while (crs.next()) {
				count++;
			}
			if (count == 0) {
				delete.setEnabled(false);
			} else {
				delete.setEnabled(true);
			}
			tableData = new String[count][headNum];
			eTitles = new String[count];
			crs.beforeFirst();
			count = 0;
			int row = 0;
			while (crs.next()) {
				String title = crs.getString(1);
				eTitles[count] = title;
				tableData[row][0] = title;
				tableData[row][1] = String.valueOf(crs.getFloat(2));
				tableData[row][2] = crs.getString(3);
				tableData[row][3] = String.valueOf(crs.getFloat(4));
				count++;
				row++;
			}
			recordTable = new JTable(tableData, head);
			recordTable.setRowHeight(20);
			recScrollPane = new JScrollPane(recordTable);
			this.add(p1, BorderLayout.NORTH);
			this.add(recScrollPane, BorderLayout.CENTER);
			this.add(p3, BorderLayout.SOUTH);
			this.validate();
		} catch (SQLException sqle) {
			sqle.printStackTrace();
		} catch (ClassNotFoundException cnfe) {
			cnfe.printStackTrace();
		}
	}

	public void actionPerformed(ActionEvent e) {
		if (e.getSource() == add) {
			String title = titleTF.getText().trim();
			if (title.equals("")) {
				JOptionPane.showMessageDialog(null, "职称不能为空!", "提示",
						JOptionPane.INFORMATION_MESSAGE);
				return;
			}
			String type = typeTF.getText().trim();
			if (type.equals("")) {
				JOptionPane.showMessageDialog(null, "奖金派发方式不能为空!", "提示",
						JOptionPane.INFORMATION_MESSAGE);
				return;
			}
			try {
				float salary = Float.valueOf(salaryTF.getText().trim());
				float m = Float.valueOf(moneyTF.getText().trim());
				DBConnection con = new DBConnection();
				String query = "select* from Head where hName='" + title + "'";
				CachedRowSet crs = con.getResultSet(query);
				if (crs.next()) {
					JOptionPane.showMessageDialog(null, "该记录已经存在!", "提示",
							JOptionPane.INFORMATION_MESSAGE);
					return;
				}
				String insert = "insert into Head values('" + title + "',"
						+ salary + ",'" + type + "'," + m + ")";
				con.addSql(insert);
				con.doDML();
				doIt();
			} catch (SQLException sqle) {
				sqle.printStackTrace();
			} catch (NumberFormatException nfe) {
				JOptionPane.showMessageDialog(null, "月薪,奖金额都必须为数字!", "提示",
						JOptionPane.INFORMATION_MESSAGE);
			} catch (ClassNotFoundException cnfe) {
				cnfe.printStackTrace();
			}

		}
		if (e.getSource() == delete) {
			String titleGet = (String) JOptionPane.showInputDialog(null,
					"请选择要删除的职称!", "", JOptionPane.INFORMATION_MESSAGE, null,
					eTitles, eTitles[0]);
			if (titleGet == null) {
				return;
			}
			String query = "select* from Head where hName='" + titleGet + "'";
			CachedRowSet crs = null;
			try {
				DBConnection con = new DBConnection();
				crs = con.getResultSet(query);
				if (!crs.next()) {
					JOptionPane.showMessageDialog(null, "该记录不存在!", "提示",
							JOptionPane.INFORMATION_MESSAGE);
					return;
				}
				int confirm = JOptionPane.showConfirmDialog(null, "您真的确认删除吗?",
						"", JOptionPane.YES_NO_OPTION);
				if (confirm == -1 || confirm == JOptionPane.NO_OPTION) {
					return;
				}
				String delete = "delete from Head where hName='" + titleGet
						+ "'";
				con.addSql(delete);
				con.doDML();
				doIt();
			} catch (SQLException sqle) {
				sqle.printStackTrace();
			} catch (ClassNotFoundException cnfe) {
				cnfe.printStackTrace();
			}
		}
	}
}