javaSE简单项目ATM机

package com.hellojava.view; import java.awt.Color; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import javax.swing.JTextField; import com.hellojava.database.dao.UserDao; import com.hellojava.entity.User; import com.hellojava.tools.Tools; /** * 登陆窗口 * @author Administrator * */ public class LoginFrame extends JFrame implements ActionListener{ private JTextField userName_Field; private JPasswordField userPwd_Field; private JLabel userName_msg; private JLabel userPwd_msg; //登陆界面 public LoginFrame(){ this.setTitle("我的第一个窗口"); File fileImage =new File(this.getClass().getClassLoader().getResource("p1.jpg").getPath()); BufferedImage image=null; try{ image=ImageIO.read(fileImage); }catch(IOException e){ e.printStackTrace(); } this.getContentPane().setLayout(null); JLabel wel_label =new JLabel("欢迎使用"); wel_label.setBounds(190, 30, 180, 30); wel_label.setFont(new Font("宋体",Font.BOLD,24)); this.getContentPane().add(wel_label); JLabel userName_label=new JLabel("账号:"); userName_label.setBounds(100, 100, 80, 25); this.getContentPane().add(userName_label); userName_Field=new JTextField(); userName_Field.setBounds(180, 100, 180, 25); this.getContentPane().add(userName_Field); userName_msg=new JLabel(); userName_msg.setBounds(380, 100, 90, 25); userName_msg.setBackground(Color.red); this.getContentPane().add(userName_msg); JLabel userPwd_label=new JLabel("密码:"); userPwd_label.setBounds(100, 150, 80, 25); this.getContentPane().add(userPwd_label); userPwd_Field=new JPasswordField(); userPwd_Field.setBounds(180, 150, 180, 25); this.getContentPane().add(userPwd_Field); userPwd_msg=new JLabel(); userPwd_msg.setBounds(380, 150, 90, 25); userPwd_msg.setBackground(Color.red); this.getContentPane().add(userPwd_msg); JButton button_ok =new JButton("登陆"); button_ok.setBounds(120, 235, 80, 25); this.getContentPane().add(button_ok); JButton button_cancel=new JButton("取消"); button_cancel.setBounds(260, 235, 80, 25); this.getContentPane().add(button_cancel); button_ok.setActionCommand("ok"); button_cancel.setActionCommand("cancel"); button_ok.addActionListener(this); button_cancel.addActionListener(this); this.setIconImage(image); this.setSize(500,360); this.setLocationRelativeTo(null); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } /** * 覆盖actionPerformed() 验证身份 */ @Override public void actionPerformed(ActionEvent e) { String command=e.getActionCommand(); switch(command){ case "ok": String name=userName_Field.getText(); String pwd=userPwd_Field.getText(); User us =new User(); us.setUserName(name); us.setUserPwd(pwd); UserDao usdao =new UserDao(); User us_check=usdao.loadUser(us); if(Tools.check_null(name)){ userName_msg.setText(" 账号不能为空!"); userName_msg.setOpaque(true); }else if(Tools.check_null(pwd)){ resetMsg(userName_msg); userPwd_msg.setOpaque(true); userPwd_msg.setText(" 密码不能为空!"); } else if(us_check!=null){ Tools.currentUser=us_check; new MainFrame(); this.dispose();//释放资源 }else{ resetMsg(userPwd_msg); JOptionPane.showMessageDialog(null, "登陆失败!"); } break; case "cancel": System.exit(0); break; } } /** * 设置label标签显示 * @param j1 */ public void resetMsg(JLabel j1){ j1.setOpaque(false); j1.setText(""); } }