基于Java JFrame 和Mysql的用户登录界面和用户注册界面
在学校完成Java课程设计——宾馆客房管理系统的用户登录界面
代码实现
用户类：
package com.dao;
public class User {
private String username;
private String password;
public static String authority;
public User(){}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public static String getAuthority() {
return authority;
}
public static void setAuthority(String authority) {
User.authority = authority;
}
}
功能接口:
package com.dao;
public interface UserDao {
public abstract boolean login(String username, String password);
public abstract void regist(User user);
}
接口实现类：
package com.dao.impl;
import com.dao.UserDao;
import java.sql.*;
import com.Mysql.DatabaseConnection;
import com.dao.User;
public class UserDaoImpl implements UserDao {
@Override
public boolean login(String username, String password) {
boolean flag = false;
DatabaseConnection conn =new DatabaseConnection();
Connection hcon=conn.getConnection();
try {
Statement sql=hcon.createStatement();
ResultSet rs=sql.executeQuery("select * from 用户权限表");
while(rs.next()){
if(username.equals(rs.getString(1)) && password.equals(rs.getString(2))){
flag=true;
User.setAuthority(rs.getString(3));
break;
}
}
} catch (SQLException e) {
e.printStackTrace();
}
conn.close();
return flag;
}
@Override
public void regist(User user) {
DatabaseConnection conn =new DatabaseConnection();
Connection hcon=conn.getConnection();
String sql="insert into 用户权限表(user,password,authority) values (?,?,?)";
try {
PreparedStatement ps=hcon.prepareStatement(sql);
ps.setObject(1,user.getUsername() );
ps.setObject(2,user.getPassword() );
ps.setObject(3,"staff");
ps.execute();
} catch (SQLException e) {
e.printStackTrace();
}
conn.close();
}
}
登录界面类（入口）：
package com.view;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JOptionPane;
@SuppressWarnings("serial")
public class Login extends javax.swing.JFrame {
public Login() {
initComponents();
init();
}
private void init() {
this.setTitle("登录界面");
this.setResizable(false);
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
double srceenWidth = d.getWidth();
double srceenHeigth = d.getHeight();
int frameWidth = this.getWidth();
int frameHeight = this.getHeight();
int width = (int) (srceenWidth - frameWidth) / 2;
int height = (int) (srceenHeigth - frameHeight) / 2;
this.setLocation(width, height);
Image i = tk.getImage("srccomviewresourceuser.jpg");
this.setIconImage(i);
}
private void initComponents() {
jButton1 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
username = new javax.swing.JTextField();
password = new javax.swing.JTextField();
mainPicture = new javax.swing.JLabel();
jButton2 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("注册");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton3.setText("重置");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jLabel1.setFont(new java.awt.Font("楷体", 0, 18));
jLabel1.setText("用户名");
jLabel2.setFont(new java.awt.Font("楷体", 0, 18));
jLabel2.setText("密 码");
username.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
usernameActionPerformed(evt);
}
});
mainPicture.setFont(new java.awt.Font("黑体", 1, 36));
mainPicture.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/view/resource/user.jpg")));
mainPicture.setText("宾馆客房管理系统");
jButton2.setText("登陆");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPicture, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton3)
.addGap(37, 37, 37)
.addComponent(jButton2)
.addGap(72, 72, 72))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(password, javax.swing.GroupLayout.DEFAULT_SIZE, 211, Short.MAX_VALUE)
.addComponent(username))
.addContainerGap(38, Short.MAX_VALUE))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(mainPicture, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(56, 56, 56)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 53, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton3)
.addComponent(jButton1)
.addComponent(jButton2))
.addGap(44, 44, 44))
);
pack();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
UserRegister ur = new UserRegister();
ur.setVisible(true);
this.dispose();
}
private void usernameActionPerformed(java.awt.event.ActionEvent evt) {
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
this.username.setText("");
this.password.setText("");
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
String username1 = this.username.getText().trim();
String password1 = this.password.getText().trim();
String usernameRegex = "[a-zA-z]{5}";
String passwordRegex = "w{6,12}";
if(!username1.matches(usernameRegex)) {
JOptionPane.showMessageDialog(this, "用户名不满足条件(5个英文字母组成)");
this.username.setText("");
this.username.requestFocus();
return;
}
if(!password1.matches(passwordRegex)) {
JOptionPane.showMessageDialog(this, "密码不满足条件(6-12个任意单词字符)");
this.password.setText("");
this.password.requestFocus();
return;
}
com.dao.UserDao ud = new com.dao.impl.UserDaoImpl();
boolean flag = ud.login(username1, password1);
if(flag){
JOptionPane.showMessageDialog(this, "恭喜你登录成功");
com.jframe.Homepage h = new com.jframe.Homepage();
h.setVisible(true);
this.dispose();
}else {
JOptionPane.showMessageDialog(this, "用户名或者密码有误");
this.username.setText("");
this.password.setText("");
this.username.requestFocus();
}
}
public static void main(String args[]) {
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Login().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel mainPicture;
private javax.swing.JTextField password;
private javax.swing.JTextField username;
}
注册界面类：
package com.view;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JOptionPane;
@SuppressWarnings("serial")
public class UserRegister extends javax.swing.JFrame {
public UserRegister() {
initComponents();
init();
}
private void init() {
this.setTitle("注册界面");
this.setResizable(false);
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
double srceenWidth = d.getWidth();
double srceenHeigth = d.getHeight();
int frameWidth = this.getWidth();
int frameHeight = this.getHeight();
int width = (int) (srceenWidth - frameWidth) / 2;
int height = (int) (srceenHeigth - frameHeight) / 2;
this.setLocation(width, height);
Image i = tk.getImage("srccomviewresourceuser.jpg");
this.setIconImage(i);
}
private void initComponents() {
password = new javax.swing.JTextField();
jButton4 = new javax.swing.JButton();
jButton6 = new javax.swing.JButton();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
username = new javax.swing.JTextField();
mainPicture1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton4.setText("确认");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
jButton6.setText("取消");
jButton6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton6ActionPerformed(evt);
}
});
jLabel5.setFont(new java.awt.Font("楷体", 0, 18));
jLabel5.setText("用户名");
jLabel6.setFont(new java.awt.Font("楷体", 0, 18));
jLabel6.setText("密 码");
username.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
usernameActionPerformed(evt);
}
});
mainPicture1.setFont(new java.awt.Font("黑体", 1, 36));
mainPicture1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/view/resource/user.jpg")));
mainPicture1.setText("宾馆客房管理系统");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel5)
.addComponent(jLabel6))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(password, javax.swing.GroupLayout.DEFAULT_SIZE, 211, Short.MAX_VALUE)
.addComponent(username)))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addGap(98, 98, 98)
.addComponent(jButton4)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 80, Short.MAX_VALUE)
.addComponent(jButton6)
.addGap(45, 45, 45)))
.addGap(0, 0, Short.MAX_VALUE))
.addComponent(mainPicture1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(mainPicture1, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(56, 56, 56)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel6)
.addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 53, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton6)
.addComponent(jButton4))
.addGap(44, 44, 44))
);
pack();
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
String username1 = this.username.getText().trim();
String password1 = this.password.getText().trim();
String usernameRegex = "[a-zA-z]{5}";
String passwordRegex = "w{6,12}";
if(!username1.matches(usernameRegex)) {
JOptionPane.showMessageDialog(this, "用户名不满足条件(5个英文字母组成)");
this.username.setText("");
this.username.requestFocus();
return;
}
if(!password1.matches(passwordRegex)) {
JOptionPane.showMessageDialog(this, "密码不满足条件(6-12个任意单词字符)");
this.password.setText("");
this.password.requestFocus();
return;
}
com.dao.User user = new com.dao.User();
user.setUsername(username1);
user.setPassword(password1);
com.dao.UserDao ud = new com.dao.impl.UserDaoImpl();
ud.regist(user);
JOptionPane.showMessageDialog(this, "用户注册成功，回到登录界面");
goLogin();
}
private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {
goLogin();
}
private void usernameActionPerformed(java.awt.event.ActionEvent evt) {
}
private void goLogin() {
Login hf = new Login();
hf.setVisible(true);
this.dispose();
}
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton6;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel mainPicture1;
private javax.swing.JTextField password;
private javax.swing.JTextField username;
}
数据库连接类：
package com.Mysql;
import java.sql.*;
public class DatabaseConnection {
private static final String DBDRIVER = "com.mysql.jdbc.Driver" ;
private static final String DBURL = "jdbc:mysql://localhost:3306/hotal?useUnicode=true&characterEncoding=utf8" ;
private static final String DBUSER = "root" ;
private static final String PASSWORD = "123456789" ;
private Connection conn = null ;
public DatabaseConnection() {
try {
Class.forName(DBDRIVER) ;
this.conn = DriverManager.getConnection(DBURL, DBUSER,PASSWORD) ;
} catch (Exception e) {
e.printStackTrace();
}
}
public Connection getConnection() {
return this.conn ;
}
public void close() {
if (this.conn != null) {
try {
this.conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
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网址: 基于Java JFrame 和Mysql的用户登录界面和用户注册界面 https://m.huajiangbk.com/newsview948789.html
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