mmain.java

简单的书店管理系统,是课设期间教师指导完成的,希望会对大家有帮助!

package book;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;


public class Mmain{
	public static void main(String args[]) {
		 EnterFrame frame = new  EnterFrame("管理员登陆",600,450);
		 frame.setResizable(false);// 设置不可更改大小
			frame.setVisible(true); // 设置窗体可见
			frame.validate(); // 设置组件可

	}
}
//登陆窗体
class EnterFrame extends Mb{
    private JLabel icon;

    private JTextField user;

 	private JPasswordField password; // 密码框

 	private ResultSet rs;

 	private ButtonIcon ok,close;

	EnterFrame(String s, int i, int j) {
		super(s, i, j);
		con.setLayout(null);

		shezhi();
		add();
	}

	void shezhi(){
		icon=new JLabel(new ImageIcon("./data/image/heard/dl1.jpg"));
		icon.setBounds(0,0,600,450);

		user=new JTextField();
		user.setBounds(70,337,100,16);
		user.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent arg0) {
				ok.doClick();
			}

		});

		password=new JPasswordField();
		password.setBounds(225,337,100,16);
		password.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent arg0) {
				ok.doClick();
			}

		});

		ok=new ButtonIcon("登陆");
		ok.setBounds(70,365,70,25);
		ok.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent arg0) {
				try {
					String name,password1;
					boolean boo=false;
					boolean boo1=true;
					if(Juage()){
						MainDAO dao=new MainDAO();
						rs=dao.getSelect1("select * from dl");
						while ((boo = rs.next()) == true) {
							name = rs.getString("用户名");
							password1 = rs.getString("密码");
							if (name.equals(user.getText()) && password1.equals(password.getText())) {
								JOptionPane.showMessageDialog(icon, "验证成功！");
								boo1=false;
								MainFrame f = new MainFrame("图书管理系统",name);
								close();
								break;
							}
						}
						if(boo1){
							JOptionPane.showMessageDialog(icon, "帐号密码有误!!!!");
							user.setText("");
							password.setText("");
						}
					}


				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		});

		close=new ButtonIcon("登陆关闭");
		close.setBounds(230,365,70,25);
		close.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent arg0) {
				int n = JOptionPane.showConfirmDialog(icon, "是否退出系统？", "退出",
						JOptionPane.YES_NO_OPTION);
				if (n == 0) {
					System.exit(0);
				}
			}
		});


	}

	boolean Juage(){
		boolean boo=true;
		if(user.getText().equals("")){
			JOptionPane.showMessageDialog(icon, "帐号不能为空!!!!");
			boo=false;
		}
		else
			if(password.getText().equals("")){
				JOptionPane.showMessageDialog(icon, "密码不能为空!!!!");
				boo=false;
			}
		return boo;
	}

	void add(){
		con.add(user);
		con.add(password);
		con.add(ok);
		con.add(close);
		con.add(icon);
	}
}