基于Oracle数据库登陆界面及功能实现 Java版

　　首先要在Oracle数据库创建表文件，包括建立表头以及关键字（唯一标识符），此次程序所用的表名称为SW_USER_INFO，表头有UNAME、UKEY、USEX等,关键字为UCC，然后添加一条记录，用户名称为system，密码为1.登陆原理为通过链接Oracle数据库，然后搜索表名称，根据关键字锁定记录，获取记录信息与登陆界面输入信息进行比对，信息一致即可登陆成功，反之则不通过。连接Oracle数据库代码如下：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class Loading_F {
    
    public String name = "";
    public int      sex  = -1 ;
    public String get_Verification_INFO(String UNAME) throws SQLException{
        String    psw  = "";
        
        Connection con = null;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            String url      = "jdbc:oracle:" + "thin:@IP地址:端口号:标识符";
            String user     = "数据库登陆名";
            String password = "口令";
            con    = DriverManager.getConnection(url, user, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        PreparedStatement pre = null;
        ResultSet result = null;
        String sql = "select * from  SW_USER_INFO where UACC=?";
        pre = con.prepareStatement(sql);
        pre.setString(1, UNAME);
        result = pre.executeQuery();
        while (result.next()){
            name = result.getString("UNAME");
            psw  = result.getString("UKEY");
            sex     = result.getInt("USEX");
        }
        con.close();
        return psw;
    }
}

　　这个里面涉及Oracle数据库表的协议（表内容的具体含义），具体协议内容不具体说明，望各位谅解，这个协议由Oracle数据库用户根据使用内容自己定义。接下来就是用户登陆界面的设计主要具有三个功能：登陆、退出和重置。具体代码如下：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.SQLException;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.LineBorder;

public class Loading_F {
    
    JFrame          f1 = new JFrame("OERI-驾校管理系统-登陆");
    static JTextField     jt1 = new JTextField();
    JPasswordField jt2 = new JPasswordField();
    JTextField       jt3 = new JTextField();
    JButton       btn1 = new JButton("确 定");
    JButton       btn2 = new JButton("退 出");
    JButton       btn3 = new JButton("重置");
    String           str1 = new String();
    
    public static void main(String[] args) {
        Loading_F lf = new Loading_F();
        lf.addFormFunction();
        lf.setform();
    }
    void Start_Loading_Form(){
        addFormFunction();
        setform();
    }
    
    void setform(){
        f1.setSize(780, 400);
        f1.setResizable(false);        
        setFrameCenter(f1);
        
        String          path = "bgp/background01.jpg";
        ImageIcon background = new ImageIcon(path);
        JLabel         label = new JLabel(background);
        label.setBounds(0, 0, f1.getWidth(), f1.getHeight());
        JPanel    imagePanel = (JPanel) f1.getContentPane();
        imagePanel.setOpaque(false);
        f1.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));
        
        JLabel jl1 = new JLabel("请输入用户信息：");
        jl1.setBounds(480, 70, 180, 50);
        jl1.setFont(new Font("宋体", Font.BOLD, 17));
        jl1.setForeground(Color.WHITE);
        f1.getLayeredPane().add(jl1, new Integer(Integer.MAX_VALUE));
        
        JLabel jl2 = new JLabel("用户名:");
        jl2.setBounds(480, 140, 180, 30);
        jl2.setFont(new Font("宋体", Font.BOLD, 13));
        jl2.setForeground(Color.WHITE);
        f1.getLayeredPane().add(jl2, new Integer(Integer.MAX_VALUE));
        
        JLabel jl3 = new JLabel("密  码:");
        jl3.setBounds(480, 180, 180, 30);
        jl3.setFont(new Font("宋体", Font.BOLD, 13));
        jl3.setForeground(Color.WHITE);
        f1.getLayeredPane().add(jl3, new Integer(Integer.MAX_VALUE));
        
        jt1.setBounds(535, 140, 180, 30);
        jt1.setBorder(new LineBorder(Color.white));
        jt1.setFont(new Font("宋体", Font.BOLD, 15));
        jt1.addMouseListener(new MouseAdapter(){
            public void mouseEntered(MouseEvent e){
                jt1.setBorder(new LineBorder(Color.black));
            }
            public void mouseExited(MouseEvent e){
                jt1.setBorder(new LineBorder(Color.white));
            }
        });
        f1.getLayeredPane().add(jt1, new Integer(Integer.MAX_VALUE));
        
        jt2.setBounds(535, 180, 180, 30);
        jt2.setEchoChar('*');
        jt2.setFont(new Font("宋体", Font.BOLD, 15));
        jt2.setBorder(new LineBorder(Color.white));
        jt2.addMouseListener(new MouseAdapter(){
            public void mouseEntered(MouseEvent e){
                jt2.setBorder(new LineBorder(Color.black));
            }
            public void mouseExited(MouseEvent e){
                jt2.setBorder(new LineBorder(Color.white));
            }
        });
        f1.getLayeredPane().add(jt2, new Integer(Integer.MAX_VALUE));
        
        btn1.setBounds(488, 240, 65, 30);
        btn1.setBorder(new LineBorder(Color.gray));
        btn1.addMouseListener(new MouseAdapter(){
            public void mouseEntered(MouseEvent e){
                btn1.setBorder(new LineBorder(Color.black));
            }
            public void mouseExited(MouseEvent e){
                btn1.setBorder(new LineBorder(Color.gray));
            }
        });
        f1.getLayeredPane().add(btn1, new Integer(Integer.MAX_VALUE));
        
        btn2.setBounds(568, 240, 65, 30);
        btn2.setBorder(new LineBorder(Color.gray));
        btn2.addMouseListener(new MouseAdapter(){
            public void mouseEntered(MouseEvent e){
                btn2.setBorder(new LineBorder(Color.black));
            }
            public void mouseExited(MouseEvent e){
                btn2.setBorder(new LineBorder(Color.gray));
            }
        });
        f1.getLayeredPane().add(btn2, new Integer(Integer.MAX_VALUE));
        
        btn3.setBounds(648, 240, 65, 30);
        btn3.setBorder(new LineBorder(Color.gray));
        btn3.addMouseListener(new MouseAdapter(){
            public void mouseEntered(MouseEvent e){
                btn3.setBorder(new LineBorder(Color.black));
            }
            public void mouseExited(MouseEvent e){
                btn3.setBorder(new LineBorder(Color.gray));
            }
        });
        f1.getLayeredPane().add(btn3, new Integer(Integer.MAX_VALUE));
        
        jt3.setBounds(490, 323, 240, 30);
        jt3.setBackground(new Color(255,255,255,0));
        jt3.setOpaque(false);
        jt3.setBorder(null);
        jt3.setFont(new Font("黑体", Font.BOLD, 13));
        jt3.setForeground(Color.WHITE);
        jt3.setEditable(false); 
        f1.getLayeredPane().add(jt3, new Integer(Integer.MAX_VALUE));
        
        Image imageIcon = Toolkit.getDefaultToolkit().getImage("bgp/tubiao.png");
        f1.setIconImage(imageIcon);
        f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        f1.setVisible(true);
    }
    void setFrameCenter(JFrame jf){
        Toolkit   tl         = Toolkit.getDefaultToolkit();
        Dimension d          = tl.getScreenSize();
        double ScreenHeigth =  d.getHeight();
        double ScreenWidth  =  d.getWidth();
        int    FrameWidth   = jf.getWidth();
        int    FrameHeigth  = jf.getHeight();
        int    Higth        = (int)(ScreenHeigth - FrameHeigth)/2;
        int    Width        = (int) (ScreenWidth - FrameWidth)/2;
        jf.setLocation(Width, Higth);
    }
    void Password_Verification() throws SQLException{
        String name             = jt1.getText();
        char[] passw             = jt2.getPassword(); 
        String entered_password = new String(passw);
        
        if(name.equals("")){
            str1 = "请输入用户名称!";
            jt3.setText(str1);
        }else if(entered_password.equals("")){
            str1 = "请输入密码!";
            jt3.setText(str1);
        }else{
            str1 = "正在验证登录信息...";
            jt3.setText(str1);
            function_res.Loading_F frlf = new function_res.Loading_F();
            String password = frlf.get_Verification_INFO(name);
            if(password.equals("")){
                str1 = "未找到该用户!";
                jt3.setText(str1);
            }else{
                if(password.equals(entered_password)){
                    str1 = "信息正确，正在登录...";
                    jt3.setText(str1);
                    f1.setVisible(false);
                    f1.dispose();
                    Major_F mf = new Major_F();
                    mf.str0 = frlf.name;
                    mf.usex = frlf.sex;
                    mf.setform();
                    mf.setFunction();
                }else{
                    str1 = "密码错误，请在确认无误后再次输入!";
                    jt3.setText(str1);
                }
            }
        }
    }
    void addFormFunction(){
        btn1.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){
                try {
                    Password_Verification();
                } catch (SQLException e1) {
                    e1.printStackTrace();
                }
            }
        });
         btn1.addKeyListener(new KeyAdapter(){
            @SuppressWarnings("static-access")
            public void keyPressed(KeyEvent ke){
                   if(ke.getKeyChar() == ke.VK_ENTER){
                       try {
                            Password_Verification();
                        } catch (SQLException e1){
                            e1.printStackTrace();
                        }
                   }
               }
        });
        
        btn2.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){
                System.exit(0);
            }
        });
        
        btn3.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){
                jt1.setText("");
                jt2.setText("");
                jt3.setText("");
            }
        });
        
    }
}

　　运行效果图如下：

　　

　

　　2018年1月27日于青岛