package ms;
import javax.print.DocFlavor.URL;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.image.BufferedImage;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JPanel;
public class Login extends JFrame{
/*定义窗体组件*/
JPanel mb1,mb2,mb3,mb4,mb5;
JLabel bq1,bq2,bq3;
JTextField wbk;
JPasswordField mmk;
JButton queding,zhuce;
String name;
String password;
Checkbox c1;
Checkbox c2;
//定义全局变量
String username;
String yhm;
String mm;
String mma;
/*创建窗体*/
public Login()
{
mb1=new JPanel();
mb2=new JPanel();
mb3=new JPanel();
mb4=new JPanel();
mb5=new JPanel();
bq1=new JLabel("大学城校园美食联盟-餐饮信息系统");
bq1.setFont(new Font("黑体",Font.BOLD,35));
bq1.setForeground(Color.red);
bq2=new JLabel("用户名:");
bq3=new JLabel("密 码:");
bq2.setFont(new Font("宋体",Font.BOLD,20));
bq3.setFont(new Font("宋体",Font.BOLD,20));
CheckboxGroup g=new CheckboxGroup();
c1=new Checkbox("用户",g,true);
c2=new Checkbox("管理员",g,false);
c1.setFont(new Font("宋体",Font.BOLD,15));
c2.setFont(new Font("宋体",Font.BOLD,15));
wbk=new JTextField(10);
mmk=new JPasswordField(10);
queding= new JButton("登录");
zhuce=new JButton("注册");
mb1.add(bq1,JPanel.CENTER_ALIGNMENT);
mb2.add(bq2);mb2.add(wbk);
mb3.add(bq3);mb3.add(mmk);
mb4.add(queding);
mb4.add(zhuce);
mb5.add(c1);mb5.add(c2);
//设置面板为透明
mb1.setOpaque(false);
mb2.setOpaque(false);
mb3.setOpaque(false);
mb4.setOpaque(false);
mb5.setOpaque(false);
ImageIcon icon=new ImageIcon("1.jpg");
JLabel label=new JLabel(icon);
label.setBounds(0, 0, icon.getIconWidth(),icon.getIconHeight());
this.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));
JPanel mb6=(JPanel)this.getContentPane();
mb6.setOpaque(false);
//为窗体组件添加事件监听
queding.addActionListener(new quedingListen());
//quxiao.addActionListener(new quxiaoListen());
zhuce.addActionListener(new zhuceListen());
mmk.addKeyListener(new keylisten());
//往窗体添加组件
this.setLayout(new GridLayout(5,1));
this.add(mb1);this.add(mb2);this.add(mb3);this.add(mb5);this.add(mb4);
this.setVisible(true);
this.setSize(600,350);
this.setLocationRelativeTo(null);//居中显示
this.setResizable(false);
}
/*输入用户名和密码的时候，按enter键快捷进入*/
class keylisten implements KeyListener
{
public void keyPressed(KeyEvent arg0) {
if(arg0.getKeyCode()==KeyEvent.VK_ENTER)
{
database();
if(password==null)
{JOptionPane.showMessageDialog(null, "用户名或密码不正确！");}
else if(password.equals(mmk.getText()))
{
if(c1.getState())
{
new Best_Food();
}
else
{
new Admin_Login();
}
dispose();//登录后自动关闭本窗口
}
else{JOptionPane.showMessageDialog(null, "用户名或密码不正确！");}
}
}
public void keyReleased(KeyEvent arg0) {
}
public void keyTyped(KeyEvent arg0) {
}
}
/*登陆键添加事件监听*/
class quedingListen implements ActionListener
{
@Override
public void actionPerformed(ActionEvent arg0) {
database();
if(password==null)
{JOptionPane.showMessageDialog(null, "用户不存在或用户名不正确！");}
else if(password.equals(mmk.getText()))
{
if(c1.getState())
{
new Best_Food();//用户身份登陆
}
else
{
new Admin_Login();//管理员身份登陆
}
dispose();//登录后自动关闭本窗口
}
else{JOptionPane.showMessageDialog(null, "用户名或密码不正确！");
}
}
}
/*database方法，用来连接数据库验证用户登录的密码*/
public void database(){
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
try{
Class.forName(driverName);
String url="jdbc:sqlserver://localhost:1433;DatabaseName=大学城校园美食联盟";
String name="sa";
String passWord="lch";
Connection conn = DriverManager.getConnection(url,name,passWord);
if(conn!=null)
{
}
String user = wbk.getText();
Statement state = conn.createStatement();
String sql=null;
if(c1.getState())
{
sql = "select password from login where username = '"+user+"'";
}
else
{
sql = "select password from admin where username = '"+user+"'";
}
ResultSet res = state.executeQuery(sql);
while(res.next())
{
password = res.getString("password");
}
conn.close();
}catch(Exception e){
JOptionPane.showMessageDialog(null,"数据库连接出现异常！");
}
}
//注册
class zhuceListen implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
// TODO 自动生成的方法存根
new New_User();
}
}
/*修改密码按钮的监控，需要连接数据库，修改数据库里的用户名和密码*/
/*
class xiugaiListen implements ActionListener{
public void actionPerformed (ActionEvent ee)
{ String checkname = JOptionPane.showInputDialog(null,"请输入旧用户名！");
String checkpassword = JOptionPane.showInputDialog(null,"请输入你的旧密码！");
String Sql1 = "select username from login where id = '1'";
String Sql2 = "select password from login where id = '1'";
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
try{
Class.forName(driverName);
String url="jdbc:sqlserver://localhost:1433;DatabaseName=大学城校园美食联盟";
Connection conn = DriverManager.getConnection(url,"sa","lch");
Statement state = conn.createStatement();
ResultSet res = state.executeQuery(Sql1);
while(res.next())
{
yhm=res.getString("username");
}
ResultSet res1 = state.executeQuery(Sql2);
while(res1.next())
{
mm=res1.getString("password");
}
if(yhm.equals(checkname)&&mm.equals(checkpassword))
{
String thename=JOptionPane.showInputDialog(null,"请输入新用户名！");
String thepassword = JOptionPane.showInputDialog(null,"请输入你的新密码！");
String SQL1="update login set username='"+thename+"' where id='1'";
String SQL2="update login set password='"+thepassword+"' where id='1'";
state.executeUpdate(SQL1);
state.executeUpdate(SQL2);
JOptionPane.showMessageDialog(null, "修改成功！");
}
else
{JOptionPane.showMessageDialog(null,"用户名或密码不正确！");}
conn.close();
}catch(Exception e){
//JOptionPane.showMessageDialog(null,"数据库连接出现异常！");
e.printStackTrace();
}
}
}
*/
public static void main(String [] args)
{
new Login();
}
}
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