loginframe.java

长沙公交查询管理系统,主要实现对人员资料的管理以及车辆的分配路线。

/*此类负责登录的界面与功能的实现*/
package pro;
import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class LoginFrame extends JDialog
{	
	private JTextField txtName;
	
	private JPasswordField pwf;
	private JButton btnLogin, btnExit;
	int m=0;
	String[] str=new String[]{"普通用户","管理员"};
	JComboBox cboQuanxian=new JComboBox(str);
    public LoginFrame()
	{

		java.awt.Container me = this.getContentPane();
		me.add(new BackPanel(0));
		
		this.addWindowListener(new java.awt.event.WindowAdapter()
		                                         {
		                                         	public void windowClosing(WindowEvent we)
		                                         	{
		                                         		int select = JOptionPane.showConfirmDialog(null, "您真的要退出吗？", "退出询问", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
		                                         		if (select == JOptionPane.YES_OPTION)
		                                         		{
		                                         			exit();
		                                         		}
		                                         	}
		                                         });
		
		this.setTitle("用户登录");
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
		this.setSize(372, 320);
		this.setResizable(false);
		this.setVisible(true);
		m=1;

	}
	
	
	private void login(int s)
	{  
	
        m=s;
        VoUser vo=new VoUser();
		String strUser = txtName.getText().trim();
		String strPwd = pwf.getText();
		vo.setmName(strUser);
		vo.setmPwd(strPwd);
		DaoUser du = new DaoUser();
		int iine=du.checkLogin(vo);
		int index=this.cboQuanxian.getSelectedIndex();
		if (iine==0 )
		{
	    	if(m==1&&index==1)
	    	{
	    	  System.out.println ("m==0===1");
	          new MainFrame(0);

	    	  this.dispose();
		    }
		    else
		    {
		    	JOptionPane.showMessageDialog(this,"用户权限有误!.请输入正确的用户权限!","错误",JOptionPane.INFORMATION_MESSAGE);
		       
		    }
		
		}
		if(iine==1)
		{
		
	    	if(m==1&&index==0)
	    	{
	    		System.out.println ("m==1====");
	          new MainFrame(1);
	          

	    	  this.dispose();
		    }
		    else
		    {
		    			
		   		JOptionPane.showMessageDialog(this,"用户权限有误!.请输入正确的用户权限!","错误" ,JOptionPane.INFORMATION_MESSAGE);
		     
		    }
		
		}
	    if(iine==2)
		{
			
			txtName.setText("");
			pwf.setText("");
			JOptionPane.showMessageDialog(this, "用户名或密码不正确，请重新输入",
			                                                        "登录失败", JOptionPane.ERROR_MESSAGE);
			txtName.requestFocus();
		}
	
	}
	
	private void exit()
	{
		DatabaseConnection.closeConnection();
		System.exit(0);
	}
	
	private class BackPanel extends JPanel
	                                         implements ActionListener,
	                                         KeyListener
	{
		public BackPanel(int i)
		{
			JLabel labQuanxian=new JLabel("用户权限："); 

			JLabel lblName = new JLabel("用户名：");
			txtName = new JTextField();
			JLabel lblPwd = new JLabel("密码：");
			pwf = new JPasswordField();
			btnLogin = new JButton("登录");
			btnExit = new JButton("退出");
			
			lblName.setBounds(56,104, 73, 21);
			labQuanxian.setBounds(56,40,73,21);
			//labQuanxian.setBounds(56,);/**/
			cboQuanxian.setBounds(159,40,123,24);
			txtName.setBounds(159, 104, 123, 24);
			lblPwd.setBounds(56, 167, 73, 21);
			pwf.setBounds(159, 164, 123, 24);
			btnLogin.setBounds(70, 224, 81, 26);
			btnExit.setBounds(199, 224, 81, 26);
			
			btnLogin.setActionCommand("login");
		//	lbtnExit.setActionCommand("exit");
			
			btnLogin.addActionListener(this);
			btnExit.addActionListener(this);
			
			pwf.addKeyListener(this);
		    if(i<1)
		    {
		       btnExit.setEnabled(true);
		  	}
		  	else
		  	{
		  	   btnExit.setEnabled(false);
		  	}
		 
			this.setLayout(null);
			this.add(labQuanxian);
			this.add(cboQuanxian);
			this.add(lblName);
			this.add(txtName);
			this.add(lblPwd);
			this.add(pwf);
			this.add(btnLogin);
			this.add(btnExit);
			
		}
		
		public void paintComponent(Graphics g)//传一个画笔进来!
		{
			javax.swing.ImageIcon ii = new ImageIcon("img/login.jpg");//把图片读出来!
			g.drawImage(ii.getImage(), 0, 0, this);//画画,定位置!
		}
	
		
		public void actionPerformed(ActionEvent ae)
		{
			String strCmd = ae.getActionCommand();
			if (strCmd.equals("login"))
			{
				login(m);
			}
			else if (strCmd.equals("exit"))
			{
				exit();
			}
		}
		
		public void keyTyped(KeyEvent ke)//设置快捷键
		{
			if (ke.getKeyChar() == 10)
			{
			   	login(m);
			}
			
			if (ke.getKeyChar() == 27)
			{
				exit();
			}
		}
		
		public void keyPressed(KeyEvent ke){} 
 		public void keyReleased(KeyEvent ke){} 
	}
}