loginframe.java

一个可以存储和打印成绩单的系统

package org.wuhang.login;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import org.jfree.report.JFreeReportBoot;
import org.signsmile.view.MainFrame;

public class LoginFrame extends JFrame{
	private static final long serialVersionUID = 2954714600302412066L;
	private JPanel msgPanel;
    private JPanel loginPanel,loginPanel1,loginPanel2,loginPanel3;
    private JLabel jlbuserName,jlbuserPwd;
    private JTextField jtfuserName;
    private JPasswordField jpfuserPwd;
    private JButton jbtLogin,jbtCancel;
   
    public LoginFrame(){
    	msgPanel = new JPanel();
    	Font font = new Font("Optima,sans-serif", Font.ITALIC, 20);
		JLabel jlbMsg = new JLabel("成教数据库管理系统");
		jlbMsg.setForeground(Color.BLUE);
		jlbMsg.setFont(font);
		msgPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
    	msgPanel.add(jlbMsg);
		
        loginPanel = new JPanel();
        jlbuserName = new JLabel("用户:");
        jlbuserPwd = new JLabel("密码:");
        jtfuserName = new JTextField(10);
        jpfuserPwd = new JPasswordField(10);
        jbtLogin = new JButton("登录");
        
        jbtCancel = new JButton("取消");
        
        loginPanel1 = new JPanel();
        loginPanel1.setLayout(new FlowLayout(FlowLayout.CENTER));
        loginPanel1.add(jlbuserName);
        loginPanel1.add(jtfuserName);
        
        loginPanel2 = new JPanel();
        loginPanel2.setLayout(new FlowLayout(FlowLayout.CENTER));
        loginPanel2.add(jlbuserPwd);
        loginPanel2.add(jpfuserPwd);
        
        loginPanel3 = new JPanel();
        loginPanel3.setLayout(new FlowLayout(FlowLayout.RIGHT));
        loginPanel3.add(jbtLogin);
        loginPanel3.add(jbtCancel);
        
        loginPanel.setLayout(new BorderLayout());
        loginPanel.add(loginPanel1,BorderLayout.NORTH);
        loginPanel.add(loginPanel2,BorderLayout.CENTER);
        loginPanel.add(loginPanel3,BorderLayout.SOUTH);
        
        //登录
        jbtLogin.addActionListener(new ActionListener(){
        	public void actionPerformed(ActionEvent e){
        		submit();
        }});
        //取消
        jbtCancel.addActionListener(new ActionListener(){
        	public void actionPerformed(ActionEvent e){
        		dispose();
        	}
        	
        });
        
        this.setTitle("成教数据库管理");
        this.getContentPane().add(msgPanel,BorderLayout.NORTH);
        this.getContentPane().add(loginPanel,BorderLayout.CENTER);
        this.setSize(300,200);
        
		this.setLocation(this.getToolkit().getScreenSize().width / 2
				- this.getWidth() / 2, this.getToolkit().getScreenSize().height
				/ 2 - this.getHeight() / 2);
        this.setResizable(false);
        this.getRootPane().setDefaultButton(jbtLogin);
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    private void submit(){
    	char user_Pwd[] = jpfuserPwd.getPassword();
		String user_name = jtfuserName.getText();
		String s_user_Pwd = new String();
		if("".equals(user_name)){
			JOptionPane.showMessageDialog(null, "请输入登录账户", "提示",
					JOptionPane.PLAIN_MESSAGE);
		}
		else if(user_Pwd.length==0){
			JOptionPane.showMessageDialog(null, "请输入密码", "提示",
					JOptionPane.PLAIN_MESSAGE);
		}
	
		else{
			for(int i=0;i<user_Pwd.length;i++){
				s_user_Pwd = s_user_Pwd + user_Pwd[i];
			}
			if(CheckUser.checkPwd(s_user_Pwd, user_name)){
				setVisible(false);
				JFreeReportBoot.getInstance().start();
				MainFrame.GetMainFrame();
			}
			else{
				JOptionPane.showMessageDialog(null, "账户或密码不正确", "提示",
						JOptionPane.ERROR_MESSAGE);
				//jtfuserName.setText("");
        		jpfuserPwd.setText("");
			}
		}
	
    }
    
    public static void main(String args[]){
    	new LoginFrame();
    }
}