Java Swing 影楼管理系统之登录功能

开头打广告，Java1234.com。

首先，来个效果图。

关键代码

1，界面层

private void Jb_DengLuActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        String UserName = this.Jb_UserNameTxt.getText();
        String Password = new String(this.Jb_PasswordTxt.getPassword());
        if (StringUtil.IfEmpty(UserName)) {
            JOptionPane.showMessageDialog(null, "用户命不能为空！");

        } else if (StringUtil.IfEmpty(Password)) {
            JOptionPane.showMessageDialog(null, "密码不能为空！");
        }
        try {
            User user = new User(UserName, Password);
            Connection con = null;
            con = dbutil.getcon();
            User userquery = usdao.loginOn(con, user);
            if (userquery != null) {
                //JOptionPane.showMessageDialog(null, "用户成功登录！");
                this.dispose();
                MainFrm mainfrm = new MainFrm();
                mainfrm.setVisible(true);

            } else {
                JOptionPane.showMessageDialog(null, "用户登录失败");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void Jb_RetActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        this.Jb_UserNameTxt.setText("");
        this.Jb_PasswordTxt.setText("");
    }

2，数据连接层

public User loginOn(Connection con, User user){
        User Resultuser=new User() ;
        String sql="select*from tb_user where UserName=? and passWord=? ";
        try {
            PreparedStatement pstm=con.prepareStatement(sql);
            pstm.setString(1, user.getUserName());
            pstm.setString(2, user.getPassword());
            ResultSet rs= pstm.executeQuery();
            while(rs.next()){
                Resultuser.setUserName(rs.getString("UserName"));
                Resultuser.setPassword(rs.getString("passWord"));    
            }    
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return Resultuser;
    }