登录与注册

[java]代码库

package com.lzy;
/*
 * 登录窗口
 */
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

import com.lzy.adm.AdminView;
import com.lzy.sql.GetSQL;
import com.lzy.stuExam.Student;

public class LoginView extends JFrame implements ActionListener {
	
	JLabel jlb1,jlb2,jlb3;
	JTextField jtf;
	JPasswordField jpf;
	JButton jb1,jb2;
	JRadioButton jrb1,jrb2;
	ButtonGroup bg;
	JPanel jp1,jp2,jp3,jp4;
	
	Color color=new Color(100, 155,225);
	
	LoginView(){
		
		jlb1=new JLabel("用户名:");
		jlb2=new JLabel("密    码:");
		jlb3=new JLabel("权    限:");
		
		jtf=new JTextField(10);
		jpf=new JPasswordField(10);
		
		jb1=new JButton("登录");
		jb2=new JButton("退出");
		//注册监听
		jb1.addActionListener(this);
		jb2.addActionListener(this);
		
		jrb1=new JRadioButton("学生",true);
		jrb2=new JRadioButton("管理员");
		//透明按钮
		jrb1.setContentAreaFilled(false);
		jrb2.setContentAreaFilled(false);
		//按钮组
		bg=new ButtonGroup();
		
		bg.add(jrb1);
		bg.add(jrb2);
		
		//注册监听
		jrb1.addActionListener(this);
		jrb2.addActionListener(this);
		
		jp1=new JPanel();
		jp2=new JPanel();
		jp3=new JPanel();
		jp4=new JPanel();
		
		jp1.add(jlb1);
		jp1.add(jtf);
		
		jp2.add(jlb2);
		jp2.add(jpf);
		
		jp3.add(jlb3);
		jp3.add(jrb1);
		jp3.add(jrb2);
		
		jp4.add(jb1);
		jp4.add(jb2);
		
		jp1.setBackground(color);
		jp2.setBackground(color);
		jp3.setBackground(color);
		jp4.setBackground(color);
		
		this.setLayout(new GridLayout(4,1));
		this.add(jp1);
		this.add(jp2);
		this.add(jp3);
		this.add(jp4);
		this.setTitle("在线考试系统");
		this.setSize(300,250);
		this.setLocationRelativeTo(null);
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		
	}
	
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getActionCommand()=="退出"){
			System.exit(0);
		}else {
			if(e.getActionCommand()=="登录"){
				if(!(jtf.getText().isEmpty()) && !(jpf.getText().isEmpty())){
					//连接数据库
					GetSQL.connectSQL();
					//权限选择
					if(jrb1.isSelected()){
						//查找用户
						GetSQL.stu(jtf.getText());
						if(GetSQL.pwd==null){
							this.clear();
						}else {
							if(GetSQL.pwd.equals(jpf.getText().trim())){
								JOptionPane.showMessageDialog(null, "登录成功！");
								this.clear();
								this.dispose();
								new Student();
							}else {
								JOptionPane.showMessageDialog(null, "密码不正确，请重新输入！");
								this.clear();
							}
						}
					}
					//权限选择
					if(jrb2.isSelected()){
						//查找用户
						GetSQL.adm(jtf.getText());
						if(GetSQL.pwd==null){
							this.clear();
						}else {
							if(GetSQL.pwd.equals(jpf.getText().trim())){
								JOptionPane.showMessageDialog(null, "登录成功！");
								this.clear();
								this.dispose();
								new AdminView();
							}else {
								JOptionPane.showMessageDialog(null, "密码不正确，请重新输入！");
								this.clear();
							}
						}
					}
				}else {
					JOptionPane.showMessageDialog(null, "请输入所有信息");
					this.clear();
				}
			}
		}
	}
	
	//清空
	private void clear(){
		jtf.setText("");
		jpf.setText("");
	}
	
//	public static void main (String args[]){
//		new Login();
//	}
	
}


package com.lzy;

public class Main {
	public static void main (String args[]){
		new LoginView();
	}
}