Java interface and login verification code

Programming ideas:

   The first is the login page, registration page, and home page

   Data may then be stored in the table, i.e. registered user can enter data in the graphics frame

   Retrieve all the data in the back end, to see if there is data

   Corresponding to randomly generated codes, and requires the input of the verification code display

   Finally, to complete the login

Source:

package yanzhengma;

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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Interface extends JFrame {
 private static final long serialVersionUID = 1L;

 private static String record;

 public static void main(String[] args) {
  new Interface();
 }

 Interface public () {
  // create instance of JFrame
  JFrame frame = new JFrame ( "please login:");

  // 设置frame大小
  frame.setLocation(500, 300);
  frame.setSize(400, 200);
  frame.setResizable(false);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  // Create a panel
  JPanel panel = new JPanel ();

  // add panel
  frame.add (panel);

  // Set the panel particular forms
  placeComponents (panel);

  // Set interface is visible
  frame.setVisible (true);

 }

 public void placeComponents(JPanel panel) {

  // clear the panel
  panel.setLayout (null);

  // Create user component
  JLabel userLabel = new JLabel ( "User Name:");
  userLabel.setBounds (10, 20 is, 80, 25);
  panel.add (userLabel);

  // Create a text field for the user to input
  the JTextField = new new userText the JTextField (20 is);
  userText.setBounds (100, 20 is, 165, 25);
  panel.add (userText);

  // create a password component
  JLabel passwordLabel = new JLabel ( "Password:");
  passwordLabel.setBounds (10, 50, 80, 25);
  panel.add (passwordLabel);

  // Create a password text field
  JPasswordField PasswordText = new new JPasswordField (20);
  passwordText.setBounds (100, 50, 165, 25);
  panel.add (PasswordText);

  // Create the component verification code used
  JLabel verificationLabel = new JLabel ( "verification code:");
  verificationLabel.setBounds (10, 80, 80, 25);
  panel.add (verificationLabel);

  // Create a text field codes
  the JTextField = new new verificationText the JTextField (20 is);
  verificationText.setBounds (100, 80, 80, 25);
  panel.add (verificationText);

  // create a random string
  String Result = "";
  for (int I = 0; I <. 6; I ++) {
   int intVal = (int) (Math.random () * 26 is + 97);
   Result = Result + ( char) intVal;
  }
  Record = Result;

  // Create verification code display components used
  the JLabel verificationShowLabel the JLabel new new = (Result);
  verificationShowLabel.setBounds (200 is, 80, 80, 25);
  panel.add (verificationShowLabel);

  // Create the login button
  JButton loginButton = new JButton ( "login");
  loginButton.setBounds (10, 120, 80, 25);
  panel.add (loginButton);

  // button to monitor
  the ActionListener = new new ourListener1 the ActionListener () {
   public void the actionPerformed (the ActionEvent E) {
    IF (e.getSource () == loginButton) // determines whether or not the login button click
    {
     IF (record.equalsIgnoreCase (verificationText.getText ())) // determines whether the correct verification code
     {
      iF (StoreroomManager.datelist.size () == 0) // determines whether there is data memory space
      {
       JOptionPane.showMessageDialog (null, "you have not registered");
       userText. the setText ( "");
       passwordText.setText ( "");

      } Else // existing assignment date, and retrieves whether there is a user registered
      {
       Storeroom Storeroom date = new new ();
       date.setUser (userText.getText ()); // get the username entered by the user
       date. setPassword (passwordText.getText ()); // get the password entered by the user
       StoreroomManager.confirmDate (DATE);
       passwordText.setText ( "");
       verificationText.setText ( "");
      }
     } // this code is not correct the else
     {
      PasswordText .setText ( "");
      verificationText.setText ( "");
      JOptionPane.showMessageDialog (null, "code is incorrect, please re-enter");
      // Create a random string
      string Result = "";
      for (int I = 0; i <6; i ++ ) {
       int intVal = (int) (Math.random() * 26 + 97);
       result = result + (char) intVal;
      }
      record = result;
      verificationShowLabel.setText(result);

     }
    }
   }
  };
  loginButton.addActionListener(ourListener1);

  // Create the register button
  JButton registerButton = new JButton ( "Register");
  registerButton.setBounds (100, 120, 80, 25);
  panel.add (registerButton);

  // 对按钮进行监视
  ActionListener ourListener2 = new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    if (e.getSource() == registerButton) {
     userText.setText("");
     passwordText.setText("");
     verificationText.setText("");
     new RegisterInterface();
    }
   }
  };
  registerButton.addActionListener(ourListener2);

  // Create the refresh button
  JButton refreshButton = new JButton ( "refresh");
  refreshButton.setBounds (250, 80, 80, 25);
  panel.add (refreshButton);

  // button to monitor
  the ActionListener = new new ourListener3 the ActionListener () {
   public void the actionPerformed (the ActionEvent E) {
    IF (e.getSource () == to refreshButton) {
     passwordText.setText ( "");
     verificationText.setText ( "");
     // create a random string
     string Result = "";
     for (int I = 0; I <. 6; I ++) {
      int intVal = (int) (Math.random () * 26 is + 97);
      Result = Result + ( char) intVal;
     }
     Record = Result;
     verificationShowLabel.setText (Result);

    }
   }
  };
  refreshButton.addActionListener(ourListener3);
 }
}

 

 

 

// This file is equivalent to a database for storing data

package yanzhengma;

import java.util.ArrayList;
import java.util.List;

import javax.swing.JOptionPane;

class Storeroom {
 private String User;
 private String password;

 void setUser(String str) {
  User = str;
 }

 String getUser() {
  return User;

 }

 void setPassword(String str) {
  password = str;
 }

 String getpassword() {
  return password;

 }

}

class StoreroomManager // operate on the data classes
{
 static List <Storeroom> = new new datelist the ArrayList <Storeroom> (0);

 static void confirmDate (Storeroom date) // log through the data
 {
  int In Flag = 0;

  for (int i = 0; i < datelist.size(); i++) {
   if (date.getUser().equalsIgnoreCase(datelist.get(i).getUser())) {
    if (date.getpassword().equalsIgnoreCase(datelist.get(i).getpassword())) {
     JOptionPane.showMessageDialog(null, "登录成功");
     flag++;
    }

   }
  }
  ( "Data entry:") System.out.println;
  System.out.println ( "User Name:" + date.getUser ());
  System.out.println ( "Password:" + date.getpassword ( ));
  for (int I = 0; I <datelist.size (); I ++) {
   System.out.println ( "table" + (i + 1) + " data:");
   the System.out. println ( "user name:" + datelist.get (I) .getUser ());
   System.out.println ( "password:" + datelist.get (I) .getpassword ());
  }
  IF (In Flag == 0 ) {
   JOptionPane.showMessageDialog (null, "user name or password is wrong!");
  }

 }

 static boolean searchDate(Storeroom date)// 登录,遍历数据
 {
  int flag = 0;
  for (int i = 0; i < datelist.size(); i++) {
   if (date.getUser().equals(datelist.get(i).getUser()))
    if (date.getpassword().equals(datelist.get(i).getpassword()))
     flag++;
  }
  if (flag == 0)
   return false;
  else
   return true;

 }

}

 

 

 

 

 

// This document is about the same as the class Interface

package yanzhengma;

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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class RegisterInterface {

 private static String record;

 registerInterface public () {
  // create instance of JFrame
  JFrame frame = new JFrame ( "Welcome to the registration page:");

  // 设置frame大小
  frame.setLocation(500, 300);
  frame.setSize(400, 200);
  frame.setResizable(false);
  frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

  // Create a panel
  JPanel panel = new JPanel ();

  // add panel
  frame.add (panel);

  // Set the panel particular forms
  placeComponents (panel, frame);

  // Set interface is visible
  frame.setVisible (true);

 }

 void placeComponents public (the JPanel Panel, the JFrame Frame) {
  // Clear panel
  panel.setLayout (null);

  // Create user component
  JLabel userLabel = new JLabel ( "User Name:");
  userLabel.setBounds (10, 20 is, 80, 25);
  panel.add (userLabel);

  // Create a text field for the user to input
  the JTextField = new new userText the JTextField (20 is);
  userText.setBounds (100, 20 is, 165, 25);
  panel.add (userText);

  // create a password component
  JLabel passwordLabel = new JLabel ( "Password:");
  passwordLabel.setBounds (10, 50, 80, 25);
  panel.add (passwordLabel);

  // Create a password text field
  JPasswordField PasswordText = new new JPasswordField (20);
  passwordText.setBounds (100, 50, 165, 25);
  panel.add (PasswordText);

  // Create the component verification code used
  JLabel verificationLabel = new JLabel ( "verification code:");
  verificationLabel.setBounds (10, 80, 80, 25);
  panel.add (verificationLabel);

  // Create a text field codes
  the JTextField = new new verificationText the JTextField (20 is);
  verificationText.setBounds (100, 80, 80, 25);
  panel.add (verificationText);

  // create a random string
  String Result = "";
  for (int I = 0; I <. 6; I ++) {
   int intVal = (int) (Math.random () * 26 is + 97);
   Result = Result + ( char) intVal;
  }
  Record = Result;

  // Create verification code display components used
  the JLabel verificationShowLabel the JLabel new new = (Result);
  verificationShowLabel.setBounds (200 is, 80, 80, 25);
  panel.add (verificationShowLabel);

  // Create the confirmation button
  JButton confirmButton = new JButton ( "OK");
  confirmButton.setBounds (10, 120, 80, 25);
  panel.add (ConfirmButton);

  // button on the monitor (confirmed, i.e., the registration button)
  the ActionListener ourListener1 the ActionListener new new = () {
   public void the actionPerformed (the ActionEvent E) {

    if (e.getSource() == confirmButton) {
     if (record.equalsIgnoreCase(verificationText.getText())) {
      Storeroom date = new Storeroom();
      date.setUser(userText.getText());
      date.setPassword(passwordText.getText());
      if (StoreroomManager.searchDate(date))
       frame.dispose();
      else {
       StoreroomManager.datelist.add(date);
       frame.dispose();
      }
     } else {
      JOptionPane.showMessageDialog(null, "验证码错误，请重新输入");
      verificationText.setText("");
      passwordText.setText("");

      // create a random string
      String Result = "";
      for (int I = 0; I <. 6; I ++) {
       int intVal = (int) (Math.random () * 26 is + 97);
       Result = Result + ( char) intVal;
      }
      Record = Result;
      verificationShowLabel.setText (Result);
     }

    }
   }

  };
  confirmButton.addActionListener(ourListener1);

  // Create a cancel button
  JButton cancelButton = new JButton ( "Cancel");
  cancelButton.setBounds (100, 120, 80, 25);
  panel.add (By cancelButton);

  // 对按钮进行监视
  ActionListener ourListener2 = new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    if (e.getSource() == cancelButton) {
     JOptionPane.showMessageDialog(null, "are you kidding me?!");
     frame.dispose();
    }
   }
  };
  cancelButton.addActionListener(ourListener2);

  // Create the refresh button
  JButton refreshButton = new JButton ( "refresh");
  refreshButton.setBounds (250, 80, 80, 25);
  panel.add (refreshButton);

  // button to monitor
  the ActionListener = new new ourListener3 the ActionListener () {
   public void the actionPerformed (the ActionEvent E) {
    IF (e.getSource () == to refreshButton) {
     passwordText.setText ( "");
     verificationText.setText ( "");
     // create a random string
     string Result = "";
     for (int I = 0; I <. 6; I ++) {
      int intVal = (int) (Math.random () * 26 is + 97);
      Result = Result + ( char) intVal;
     }
     Record = Result;
     verificationShowLabel.setText (Result);

    }
   }
  };
  refreshButton.addActionListener(ourListener3);

 }
}