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描述java的登录代码 java登录界面代码

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java写的用户登陆实例 ， 用eclipse开发的具体步奏和代码import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;import javax.swing.*;public class Login extends JFrame{
JLabel user,passwd;
JTextField userput;
JPasswordField passput;
JButton denglu,tuichu;
public Login(){
super("用户登录");
Container c=getContentPane();
c.setLayout(null);
Font f=new Font("宋体",Font.PLAIN,12);
user=new JLabel("账号");
passwd=new JLabel("密码");
userput=new JTextField();
passput=new JPasswordField();
denglu=new JButton("登录");
denglu.setFont(f);
denglu.addActionListener(new NewAction());
tuichu=new JButton("退出");
tuichu.setFont(f);
tuichu.addActionListener(new NewAction());
user.setBounds(50,50,60,20);
userput.setBounds(110,50,150,20);
passwd.setBounds(50,80,60,20);
passput.setBounds(110,80,150,20);
denglu.setBounds(50,160,60,30);
tuichu.setBounds(200,160,60,30);
c.add(user);
c.add(userput);
c.add(passwd);
c.add(passput);
c.add(denglu);
c.add(tuichu);
setSize(350, 300);
setVisible(true);
}
class NewAction implements ActionListener{
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=CDM";
String user="sa";
String passwd="394513265";
java.sql.Connection con;
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
con= DriverManager.getConnection(url,user,passwd);
}catch(Exception ep){
JOptionPane.showMessageDialog(null, "加载驱动失败描述java的登录代码！");
}
if(e.getSource()==denglu){
Find();
}
if(e.getSource()==tuichu){
dispose();
}
}public void Find(){
String lk="select * from login";
try{
Statement sql=con.createStatement();
ResultSet rs=sql.executeQuery(lk);
while(rs.next()){
if(rs.getString(1).equals(userput.getText())rs.getString(2).equals(passput.getText()))
new MainClient();
else
JOptionPane.showMessageDialog(null, "用户名或密码错误");
}
rs.close();
}catch(SQLException p){
JOptionPane.showMessageDialog(null, p.getMessage());
}
}
}
public static void main(String[] args) {
Login l=new Login();
l.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
步骤就是建个工程 然后建个class
求Java编的登录界面代码：登录后分别进入管理员界面及用户界面 ， 依据是数据库中的用户名和密码分三个包，自己建个包 ， 导进去就ok了，数据库是access的 。
package 登录;
import java.awt.EventQueue;
public class Cilent {
private JFrame frame;
private JTextField textField;
private JPasswordField passwordField;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Cilent window = new Cilent();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Cilent() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setTitle("登陆界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
JLabel lblNewLabel = new JLabel("用户名");
lblNewLabel.setBounds(38, 43, 80, 34);
frame.getContentPane().add(lblNewLabel);
textField = new JTextField();
textField.setBounds(155, 42, 227, 37);
frame.getContentPane().add(textField);
textField.setColumns(10);
JLabel label = new JLabel("密　码");
label.setBounds(38, 115, 80, 34);
frame.getContentPane().add(label);
passwordField = new JPasswordField();
passwordField.setBounds(155, 115, 227, 37);
frame.getContentPane().add(passwordField);
JButton btnNewButton = new JButton("登　录");
btnNewButton.setBounds(60, 187, 115, 34);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
UserCheck UC=new UserCheck(textField.getText(),String.valueOf(passwordField.getPassword()));
if(UC.getI()!=0)//有此用户
{
frame.setVisible(false);
}
else
{
textField.setText("");
passwordField.setText("");
}
}
});
JButton button = new JButton("取　消");
button.setBounds(242, 187, 115, 34);
frame.getContentPane().add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
textField.setText("");
passwordField.setText("");
}
});
}
}
/*****************************************************************/
package 登录;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import 操作处理.UsersCL;
/**@author 20111024
* 检测登录的用户在数据库中有无，若没有，则提示没有此用户，
* 若有，则判断级别：普通用户还是管理员 。
*/
public class UserCheck {
private int i=0;//用户级别:0不是用户、1是管理员、2是普通用户
UserCheck(String name ,String password)
{
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
String query="select * from users where name='" name "' and passwd='" password "'";
rs=stmt.executeQuery(query);
if(rs.next())
{
//数据库中有此用户，访问成功
i=Integer.parseInt(rs.getString(3));
UsersCL UL=new UsersCL(i);
}
else
{
i=0;//没有用户是默认是0级
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public int getI() {
return i;
}
}
/********************************************************************************************/
package 操作处理;
import java.awt.EventQueue;
public class UsersCL implements ActionListener{
private JFrame frame;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
private int i=0;
private JLabel label_3;
private JTextField textField_4;
public UsersCL(int i) {
this.i=i;
frame = new JFrame();
frame.setTitle("用户处理界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
frame.setVisible(true);
JLabel lblNewLabel = new JLabel("学　号");
lblNewLabel.setBounds(24, 32, 74, 29);
frame.getContentPane().add(lblNewLabel);
JLabel label = new JLabel("姓　名");
label.setBounds(24, 71, 74, 29);
frame.getContentPane().add(label);
JLabel label_1 = new JLabel("年　龄");
label_1.setBounds(24, 110, 74, 29);
frame.getContentPane().add(label_1);
label_3 = new JLabel("性　别");
label_3.setBounds(24, 149, 74, 29);
frame.getContentPane().add(label_3);
JLabel label_2 = new JLabel("状　态");
label_2.setBounds(24, 195, 74, 29);
frame.getContentPane().add(label_2);
textField = new JTextField();
textField.setBounds(101, 34, 113, 25);
frame.getContentPane().add(textField);
textField.setColumns(10);
textField_1 = new JTextField();
textField_1.setColumns(10);
textField_1.setBounds(101, 73, 113, 25);
frame.getContentPane().add(textField_1);
textField_2 = new JTextField();
textField_2.setColumns(10);
textField_2.setBounds(101, 112, 113, 25);
frame.getContentPane().add(textField_2);
textField_3 = new JTextField();
textField_3.setEditable(false);
textField_3.setColumns(10);
textField_3.setBounds(101, 199, 288, 25);
frame.getContentPane().add(textField_3);
textField_4 = new JTextField();
textField_4.setColumns(10);
textField_4.setBounds(101, 149, 113, 25);
frame.getContentPane().add(textField_4);
if(1==i)
{
JButton btnNewButton = new JButton("追　加");
btnNewButton.setBounds(276, 41, 113, 29);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(this);
btnNewButton.setActionCommand("追加");
JButton button_1 = new JButton("删　除");
button_1.setBounds(276, 145, 113, 29);
frame.getContentPane().add(button_1);
button_1.addActionListener(this);
button_1.setActionCommand("删除");
}
JButton button = new JButton("查　询");
button.setBounds(276, 91, 113, 29);
frame.getContentPane().add(button);
button.addActionListener(this);
button.setActionCommand("查询");
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String name,age,sex,query=null;
int num,age1,count=0;
num=Integer.parseInt(textField.getText());
name=textField_1.getText();
age1=Integer.parseInt(textField_2.getText());
sex=textField_4.getText();
if(e.getActionCommand().equals("追加"))
{
query="insert into students values(" num "," "'" name "'," age1 ",'" sex "');";
count=1;
}
else if(e.getActionCommand().equals("查询"))
{
query="select * from students where XSB=" num ";";
count=2;
}
else if(e.getActionCommand().equals("删除"))
{
query="delete from students where XSB=" num " and name=" "'" name "'";
count=3;
}
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
String query1=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
if(count==1)
{
query1="select * from students where XSB=" num ";";
rs=stmt.executeQuery(query1);
if(rs.next())
textField_3.setText("已经由此记录，不能追加！");
else
{
stmt.executeUpdate(query);
textField_3.setText("已经追加完成！");
}
}
else if(2==count)
{
stmt.executeQuery(query);
rs=stmt.executeQuery(query);
if(rs.next())
{
textField_3.setText("已查找到此记录！");
}
else
{
textField_3.setText("没有此记录，可以追加！");
}
}
else if(3==count)
{
query1="select * from students where XSB=" num " and name=" "'" name "'";
rs=stmt.executeQuery(query1);
if(rs.next())
{
stmt.executeUpdate(query);
textField_3.setText("已删除此记录！");
}
else
textField_3.setText("无此记录！");
}
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
finally{
//关闭资源
if(stmt!=null){
try {
stmt.close();
} catch (Exception e2) {
// TODO: handle exception
}
stmt=null;
}
if(con!=null){
try {
con.close();
} catch (Exception e2) {
// TODO: handle exception
}
con=null;
}
}
}
}
登陆界面的java代码怎么写？import java.awt.*; \x0d\x0aimport javax.swing.*; \x0d\x0aimport java.awt.event.*; \x0d\x0aimport java.sql.*; \x0d\x0a\x0d\x0aclass LoginFrm extends JFrame implements ActionListener \x0d\x0a{ \x0d\x0aJLabel lbl1=new JLabel("用户名"); \x0d\x0aJLabel lbl2=new JLabel("密码"); \x0d\x0aJTextField txt=new JTextField(15); \x0d\x0aJPasswordField pf=new JPasswordField(); \x0d\x0aJButton btn1=new JButton("确定"); \x0d\x0aJButton btn2=new JButton("取消"); \x0d\x0a\x0d\x0apublic LoginFrm() \x0d\x0a{ \x0d\x0athis.setTitle("登陆"); \x0d\x0aJPanel jp=(JPanel)this.getContentPane(); \x0d\x0ajp.setLayout(new GridLayout(3,2,10,10)); \x0d\x0ajp.add(lbl1);jp.add(txt); \x0d\x0ajp.add(lbl2);jp.add(pf); \x0d\x0ajp.add(btn1);jp.add(btn2); \x0d\x0abtn1.addActionListener(this); \x0d\x0abtn2.addActionListener(this); \x0d\x0a} \x0d\x0a\x0d\x0apublic void actionPerformed(ActionEvent ae) \x0d\x0a{ \x0d\x0aif(ae.getSource()==btn1) \x0d\x0a{ \x0d\x0atry \x0d\x0a{ \x0d\x0aClass.forName("sun.jdbc.odbc.JdbcOdbcDriver")； \x0d\x0aConnection con=DriverManager.getConnection("jdbc:odbc:MyDB","",""); \x0d\x0aStatement cmd=con.createStatement(); \x0d\x0aResultSet rs=cmd.executeQuery("select * from loginAndpassword where login='" txt.getText() "' and password='" pf.getText() "'"); \x0d\x0aif(rs.next()) \x0d\x0a{ \x0d\x0aJOptionPane.showMessageDialog(null,"登陆成功！"); \x0d\x0a} \x0d\x0aelse \x0d\x0aJOptionPane.showMessageDialog(null,"用户名或密码错误！"); \x0d\x0a} catch(Exception ex){} \x0d\x0a\x0d\x0aif(ae.getSource()==btn2) \x0d\x0a{ \x0d\x0atxt.setText(""); \x0d\x0apf.setText(""); \x0d\x0a} \x0d\x0a} \x0d\x0a} \x0d\x0a\x0d\x0apublic static void main(String arg[]) \x0d\x0a{ \x0d\x0aJFrame.setDefaultLookAndFeelDecorated(true); \x0d\x0aLoginFrm frm=new LoginFrm(); \x0d\x0afrm.setSize(400,200); \x0d\x0afrm.setVisible(true); \x0d\x0a} \x0d\x0a}
实现界面登陆，退出功能的java代码怎么写？CS结构系统的退出如下：public void init() {\x0d\x0athis.setTitle("用户登录界面");\x0d\x0athis.add(createCenterPane());\x0d\x0athis.setDefaultCloseOperation(this.DO_NOTHING_ON_CLOSE);\x0d\x0athis.setSize(new Dimension(450, 335));\x0d\x0athis.setLocationRelativeTo(null);\x0d\x0a// this.setVisible(true);\x0d\x0athis.addWindowListener(new WindowAdapter() {\x0d\x0apublic void windowClosing(WindowEvent e) {\x0d\x0aint choose = JOptionPane.showConfirmDialog(null, "是否要退出登录界面？",\x0d\x0a"系统提示：", JOptionPane.YES_NO_OPTION);\x0d\x0aif (choose == JOptionPane.YES_OPTION) {\x0d\x0aSystem.exit(1);\x0d\x0a}\x0d\x0a}\x0d\x0a});\x0d\x0a }其中this为JFrame对象 。BS结构的退出直接用windows.close()方法就行了！
求JAVA实现用户登录界面代码？描述java的登录代码你要先学会截图哦,描述java的登录代码你发描述java的登录代码的看不清楚,重新写描述java的登录代码了一个描述java的登录代码你参考参考!
import java.awt.GridLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class Day30A extends JFrame {
private static final long serialVersionUID = 1L;
private JLabel labelName,labelId,labelPass,labelMoney,labelSelect,labelCar;
private JComboBoxString jcb;
private JPanel jp1,jp2,jp3,jp4,jp5,jp6,jp7;
private ButtonGroup btg;
private JRadioButton jr1,jr2;
Day30A(){
this.setTitle("注册账户");
this.setLayout(new GridLayout(7,1));
this.setSize(300,280);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
init();
this.setVisible(true);
}
private void init() {
String str="卡片类型1,卡片类型2,卡片类型3,卡片类型4,卡片类型5";
jcb=new JComboBox(str.split(","));
labelId=new JLabel("账号: ");
labelName=new JLabel("姓名: ");
labelPass=new JLabel("密码: ");
labelMoney=new JLabel("开户金额:");
labelSelect=new JLabel("存款类型:");
labelCar=new JLabel("卡片类型:");
addFun1();
addFun2();
}
private void addFun2() {
this.add(jp1);
this.add(jp2);
this.add(jp3);
this.add(jp4);
this.add(jp5);
this.add(jp6);
this.add(jp7);
}
private void addFun1() {
jp1=new JPanel();
jp1.add(labelId);
jp1.add(new JTextField(15));
jp2=new JPanel();
jp2.add(labelName);
jp2.add(new JTextField(15));
jp3=new JPanel();
jp3.add(labelPass);
jp3.add(new JTextField(15));
jp4=new JPanel();
jp4.add(labelMoney);
jp4.add(new JTextField(13));
jp5=new JPanel();
jp5.add(labelSelect);
btg=new ButtonGroup();
jr1=new JRadioButton("定期");
jr2=new JRadioButton("活期",true);
btg.add(jr1);
btg.add(jr2);
jp5.add(jr1);
jp5.add(jr2);
jp6=new JPanel();
jp6.add(labelCar);
jp6.add(jcb);
jp7=new JPanel();
jp7.add(new JButton("确定"));
jp7.add(new JButton("取消"));
}
public static void main(String[] args) {
new Day30A();
}
}
用java写一个登录界面的代码 ， 哪位大神会?。恍?。import java.awt.Dimension;
import java.awt.Toolkit;
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.JPasswordField;
import javax.swing.JTextField;
public class Test26 {
public static void main(String[] args) {
final String userName = "abc";
final String passwrod = "123";
JFrame jFrame = new JFrame("登陆界面");
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
jFrame.setBounds(((int)dimension.getWidth() - 200) / 2, ((int)dimension.getHeight() - 300) / 2, 200, 150);
jFrame.setResizable(false);
jFrame.setLayout(null);
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label1 = new JLabel("姓名");
label1.setBounds(10, 10, 100, 30);
jFrame.add(label1);
JLabel label2 = new JLabel("密码");
label2.setBounds(10, 40, 100, 30);
jFrame.add(label2);
final JTextField text1 = new JTextField();
text1.setBounds(50, 15, 130, 20);
jFrame.add(text1);
final JPasswordField text2 = new JPasswordField();
text2.setBounds(50, 45, 130, 20);
jFrame.add(text2);
JButton button = new JButton("Login");
button.setBounds(10, 75, 170, 40);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(userName.equals(text1.getText())passwrod.equals(text2.getText())) {
JOptionPane.showMessageDialog(null, "登陆成功误", "提示", JOptionPane.INFORMATION_MESSAGE);
} else {
JOptionPane.showMessageDialog(null, "错误", "提示", JOptionPane.ERROR_MESSAGE);
text1.setText("");
text2.setText("");
}
}
});
jFrame.add(button);
jFrame.setVisible(true);
}
}
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