login.java

员工管理系统 在一个公司里员工之间都有工作上的联系。对方的联系方式

package com.worker.userpan;

import java.awt.*;
import java.awt.event.*;
import java.awt.print.*;
import java.awt.datatransfer.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.util.*;

import com.tool.*;
import com.worker.information.*;
import com.worker.main.*;
import com.worker.userpan.*;

/**
 *
 * @author Administrator
 */
public class Login extends JDialog implements OKCANCEL {
    
    private int option;
    
    private JTextField tfname;
    private JPasswordField tfpass;
    
    public Login() {
        setTitle(" 登陆 ");
        setModal(true);
        createinstance();
        init();
        setVisible(true);
    }
    
    //set in the centre window
    public void init() {
        tfname.setText("");
        tfname.grabFocus();
        tfpass.setText( "" );
        setSize(250,130);
        setLocation( ToolKit.getScreenCenterLocation(getSize()) );
    }
    
    public void okaction() {
        if ( ToolKit.isNull(getname()) || ToolKit.isNull(getpass())) {
            JOptionPane.showMessageDialog(null, " 输入不能为空 ", " 错误 " , JOptionPane.ERROR_MESSAGE);
            return;
        }
        setoption(OKCANCEL.OK);
        setVisible(false);
    }
    
    public void cancelaction() {
        exitaction();
    }
    
    public void exitaction() {
        setoption(OKCANCEL.CANCEL);
        setVisible(false);
    }
    
    //get the paramma for the excution
    public String getname(){
        return tfname.getText();
    }
    
    public String getpass(){
        return String.valueOf(tfpass.getPassword());
    }
    
    public void setoption(int va) {
        option=va;
    }
    
    public int getoption() {
        return option;
    }
    
    private void createinstance() {
        
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints constraints = new GridBagConstraints();
        JPanel pane = new JPanel();
        pane.setLayout(gridbag);
        
        bulidConstraints(constraints,0,0,1,1,30,40);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor =  GridBagConstraints.CENTER;
        JLabel namelabel = new JLabel("用户名:");
        gridbag.setConstraints(namelabel,constraints);
        pane.add(namelabel);
        
        bulidConstraints(constraints,1,0,1,1,70,40);
        constraints.fill = GridBagConstraints.HORIZONTAL;
        tfname = new JTextField();
        tfname.addKeyListener( new KeyAdapter( ) {
            public void keyPressed( KeyEvent e) {
                if (e.getKeyCode()==KeyEvent.VK_ENTER) {
                    tfpass.grabFocus();
                } 
            }
        } ) ;
        
        gridbag.setConstraints(tfname,constraints);
        pane.add(tfname);
        
        bulidConstraints(constraints,0,1,1,1,30,40);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor =  GridBagConstraints.CENTER;
        JLabel passlabel = new JLabel("密码(4-8位):");
        gridbag.setConstraints(passlabel,constraints);
        pane.add(passlabel);
        
        bulidConstraints(constraints,1,1,1,1,70,40);
        constraints.fill = GridBagConstraints.HORIZONTAL;
        tfpass = new JPasswordField(8);
        
        tfpass.addKeyListener( new KeyAdapter( ) {
            public void keyPressed( KeyEvent e) {
                if (e.getKeyCode()==KeyEvent.VK_ENTER) {
                    okaction();
                } 
            }
        }) ;
        
        gridbag.setConstraints(tfpass,constraints);
        tfpass.setEchoChar('*');
        pane.add(tfpass);
        
        bulidConstraints(constraints,0,2,1,1,50,20);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor =  GridBagConstraints.EAST;
        JButton okbutton = new JButton("确认");
        gridbag.setConstraints(okbutton,constraints);
        
        okbutton.addActionListener( new ActionListener( ) {
            public void actionPerformed( final ActionEvent sub ) {
                okaction(); }
        } ) ;
        
        
        gridbag.setConstraints(okbutton,constraints);
        pane.add(okbutton);
        
        bulidConstraints(constraints,1,2,1,1,50,20);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor =  GridBagConstraints.CENTER;
        JButton cabutton = new JButton("取消");
        gridbag.setConstraints(cabutton,constraints);
        
        cabutton.addActionListener( new ActionListener( ) {
            public void actionPerformed( final ActionEvent ae ) {
                cancelaction(); }
        } ) ;
        gridbag.setConstraints(cabutton,constraints);
        pane.add(cabutton);
        
        add(pane);
        addWindowListener( new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                exitaction();
            }
        });
    }
    
    
    private void bulidConstraints(GridBagConstraints gbc,int gx,int gy,int gw,int gh,int wx,int wy){
        gbc.gridx = gx;
        gbc.gridy = gy;
        gbc.gridwidth = gw;
        gbc.gridheight = gh;
        gbc.weightx = wx;
        gbc.weighty = wy;
    }
    //you have to design the button action
}