loginframe.java

里面所含源码是本人平时做程序的一些实例

package loginInterface;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import data.*;
import user.*;
public class LoginFrame extends JFrame implements ActionListener {
        JPanel contentPane;
        JLabel nameLabel=new JLabel();
        JLabel passwordLabel=new JLabel();
        JLabel userCategoryLabel=new JLabel();
        JTextField nameTextField=new JTextField();
        JPasswordField passwordField=new JPasswordField();
        JButton loginBtn=new JButton();
        JButton exitBtn=new JButton();
        JComboBox stateComboBox=new JComboBox();
        Font font=new Font("Dialog",0,15);

    public LoginFrame(){
                try{jbInit();}
                catch(Exception e){e.printStackTrace();}
        }
        private void jbInit() throws Exception{

        //取得窗口面板
                contentPane=(JPanel)this.getContentPane();
                //定义窗口面板的布局
                contentPane.setLayout(null);
                //定义窗口的大小和标题
                this.setSize(new Dimension(400,330));
                this.setTitle("登录模块");
                //定义标签的标题、字符大小和位置
                nameLabel.setText("用户名:");
                nameLabel.setFont(font);
                nameLabel.setBounds(new Rectangle(65,57,81,16));
                passwordLabel.setText("密码:");
                passwordLabel.setFont(font);
                passwordLabel.setBounds(new Rectangle(65,112,79,16));
                userCategoryLabel.setText("用户类型:");
                userCategoryLabel.setFont(font);
                userCategoryLabel.setBounds(new Rectangle(65,156,79,16));
                //定义编辑框的位置
                nameTextField.setBounds(new Rectangle(194,67,118,22));
                passwordField.setBounds(new Rectangle(194,112,118,22));
                //定义按钮的标题,动作字符串,字符大小,位置和加入动作接收器
                loginBtn.setText("登录");
                loginBtn.setActionCommand("login");
                loginBtn.setFont(font);
                loginBtn.setBounds(new Rectangle(65,224,109,25));
                loginBtn.addActionListener(this);
                exitBtn.setText("退出");
                exitBtn.setActionCommand("exit");
                exitBtn.setFont(font);
                exitBtn.setBounds(new Rectangle(203,224,109,25));
                exitBtn.addActionListener(this);
                //定义下拉列表框的内容,第1个显示项和位置
                stateComboBox.addItem("管理员");
                stateComboBox.addItem("普通用户");
                stateComboBox.setSelectedIndex(0);
                stateComboBox.setBounds(new Rectangle(194,158,118,22));
                //为面板加入各个控件
                contentPane.add(nameLabel,null);
                contentPane.add(nameTextField,null);
                contentPane.add(passwordLabel,null);
                contentPane.add(passwordField,null);
                contentPane.add(userCategoryLabel,null);
                contentPane.add(stateComboBox,null);
                contentPane.add(loginBtn,null);
                contentPane.add(exitBtn,null);
        }
                protected void processWindowEvent(WindowEvent e){
                        if(e.getID()==WindowEvent.WINDOW_CLOSING){
                                System.exit(0);
                        }
                }
                //按钮单击事件处理代码
                public void actionPerformed(ActionEvent e){
                        //取得按钮的动作字符串
                        String actionCommand=e.getActionCommand().trim();
                        //取得用户名
                        String name=nameTextField.getText();
                        //取得密码
                        String password=new String(passwordField.getPassword());
                        //取得用户类型
                        int state=stateComboBox.getSelectedIndex();
                        //创建返回的字符串
                        String message="";
                        if(actionCommand.equals("login")){
                                LoginData login=new LoginData();
                                int result=login.checkUser(name,password,state);
                                switch(result){
                                  case 0:
                                      //管理员验证
                                      Manager manager=new Manager(name,password,state);
                                      message="该用户是管理员";
                                      break;
                                    case 1:
                                        User user=new User(name,password,state);
                                        message="该用户是普通用户";
                                        break;
                                    case -1:
                                        message="用户名或密码错误!";
                                        break;
                                }
                       //显示返回的信息
                        JOptionPane.showMessageDialog(null, message);

                        }
                        if(actionCommand.equals("exit")){
                                //清空内存
                                System.exit(0);
                        }
                }
}