import java.awt.*;

創(chuàng)新互聯(lián)堅持“要么做到,要么別承諾”的工作理念,服務領域包括:成都網(wǎng)站設計、網(wǎng)站制作、企業(yè)官網(wǎng)、英文網(wǎng)站、手機端網(wǎng)站、網(wǎng)站推廣等服務,滿足客戶于互聯(lián)網(wǎng)時代的博野網(wǎng)站設計、移動媒體設計的需求,幫助企業(yè)找到有效的互聯(lián)網(wǎng)解決方案。努力成為您成熟可靠的網(wǎng)絡建設合作伙伴!
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
class LoginFrm extends JFrame implements ActionListener
{
JLabel lbl1=new JLabel("用戶名");
JLabel lbl2=new JLabel("密碼");
JTextField txt=new JTextField(15);
JPasswordField pf=new JPasswordField();
JButton btn1=new JButton("確定");
JButton btn2=new JButton("取消");
public LoginFrm()
{
this.setTitle("登陸");
JPanel jp=(JPanel)this.getContentPane();
jp.setLayout(new GridLayout(3,2,10,10));
jp.add(lbl1);jp.add(txt);
jp.add(lbl2);jp.add(pf);
jp.add(btn1);jp.add(btn2);
btn1.addActionListener(this);
btn2.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==btn1)
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:MyDB","","");
Statement cmd=con.createStatement();
ResultSet rs=cmd.executeQuery("select * from loginAndpassword where login='"+txt.getText()+"' and password='"+pf.getText()+"'");
if(rs.next())
{
JOptionPane.showMessageDialog(null,"登陸成功!");
}
else
JOptionPane.showMessageDialog(null,"用戶名或密碼錯誤!");
} catch(Exception ex){}
if(ae.getSource()==btn2)
{
txt.setText("");
pf.setText("");
}
}
}
public static void main(String arg[])
{
JFrame.setDefaultLookAndFeelDecorated(true);
LoginFrm frm=new LoginFrm();
frm.setSize(400,200);
frm.setVisible(true);
}
}
自己寫的比較規(guī)范的代碼,都有注釋:
import javax.swing.JFrame;//框架
import javax.swing.JPanel;//面板
import javax.swing.JButton;//按鈕
import javax.swing.JLabel;//標簽
import javax.swing.JTextField;//文本框
import java.awt.Font;//字體
import java.awt.Color;//顏色
import javax.swing.JPasswordField;//密碼框
import java.awt.event.ActionListener;//事件監(jiān)聽
import java.awt.event.ActionEvent;//事件處理
import javax.swing.JOptionPane;//消息窗口
public class UserLogIn extends JFrame{
public JPanel pnluser;
public JLabel lbluserLogIn;
public JLabel lbluserName;
public JLabel lbluserPWD;
public JTextField txtName;
public JPasswordField pwdPwd;
public JButton btnSub;
public JButton btnReset;
public UserLogIn(){
pnluser = new JPanel();
lbluserLogIn = new JLabel();
lbluserName = new JLabel();
lbluserPWD = new JLabel();
txtName = new JTextField();
pwdPwd = new JPasswordField();
btnSub = new JButton();
btnReset = new JButton();
userInit();
}
public void userInit(){
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//設置關閉框架的同時結(jié)束程序
this.setSize(300,200);//設置框架大小為長300,寬200
this.setResizable(false);//設置框架不可以改變大小
this.setTitle("用戶登錄");//設置框架標題
this.pnluser.setLayout(null);//設置面板布局管理
this.pnluser.setBackground(Color.cyan);//設置面板背景顏色
this.lbluserLogIn.setText("用戶登錄");//設置標簽標題
this.lbluserLogIn.setFont(new Font("宋體",Font.BOLD | Font.ITALIC,14));//設置標簽字體
this.lbluserLogIn.setForeground(Color.RED);//設置標簽字體顏色
this.lbluserName.setText("用戶名:");
this.lbluserPWD.setText("密 碼:");
this.btnSub.setText("登錄");
this.btnReset.setText("重置");
this.lbluserLogIn.setBounds(120,15,60,20);//設置標簽x坐標120,y坐標15,長60,寬20
this.lbluserName.setBounds(50,55,60,20);
this.lbluserPWD.setBounds(50,85,60,25);
this.txtName.setBounds(110,55,120,20);
this.pwdPwd.setBounds(110,85,120,20);
this.btnSub.setBounds(85,120,60,20);
this.btnSub.addActionListener(new ActionListener()//匿名類實現(xiàn)ActionListener接口
{
public void actionPerformed(ActionEvent e){
btnsub_ActionEvent(e);
}
}
);
this.btnReset.setBounds(155,120,60,20);
this.btnReset.addActionListener(new ActionListener()//匿名類實現(xiàn)ActionListener接口
{
public void actionPerformed(ActionEvent e){
btnreset_ActionEvent(e);
}
}
);
this.pnluser.add(lbluserLogIn);//加載標簽到面板
this.pnluser.add(lbluserName);
this.pnluser.add(lbluserPWD);
this.pnluser.add(txtName);
this.pnluser.add(pwdPwd);
this.pnluser.add(btnSub);
this.pnluser.add(btnReset);
this.add(pnluser);//加載面板到框架
this.setVisible(true);//設置框架可顯
}
public void btnsub_ActionEvent(ActionEvent e){
String name = txtName.getText();
String pwd = String.valueOf(pwdPwd.getPassword());
if(name.equals("")){
JOptionPane.showMessageDialog(null,"賬號不能為空","錯誤",JOptionPane.ERROR_MESSAGE);
return;
}else if (pwd.equals("")){
JOptionPane.showMessageDialog(null,"密碼不能為空","錯誤",JOptionPane.ERROR_MESSAGE);
return;
}else if(true){
this.dispose();
}else{
JOptionPane.showMessageDialog(null,"賬號或密碼錯誤","錯誤",JOptionPane.ERROR_MESSAGE);
return;
}
}
public void btnreset_ActionEvent(ActionEvent e){
txtName.setText("");
pwdPwd.setText("");
}
public static void main(String[] args){
new UserLogIn();
}
}
用java做好的登陸界面,當?shù)顷懗晒筇D(zhuǎn)到下個頁面的代碼如下:
如果登陸驗證是在jsp中,那么跳轉(zhuǎn)可以寫成
1.response.sendRedirct("跳轉(zhuǎn)到頁面");
2.jsp:forward page="跳轉(zhuǎn)頁面"/
3.response.setHeader("Location","");
如果是登陸驗證是在servlet中,那么中轉(zhuǎn)可以寫成
1.response.sendRedirect("/a.jsp");
2.RequestDispatcher dispatcher = request.getRequestDispatcher("/a.jsp");
dispatcher .forward(request, response);
也可以使用js代碼實現(xiàn):
script
function validate(){
window.location.href="/index.jsp";
}
/script
通過B/S來實現(xiàn)是最方便的了,代碼太簡單了。 登錄頁面用JSP,后臺請求一個action或servlet即可。 后臺獲取頁面上的用戶名和密碼通過request.getParameter("userName")和request.getParameter("passWord")來獲取,注意,這里的userName和passWord就是指頁面上input的name.
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("登陸界面");
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("密碼");
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,?"登陸成功誤",?"提示",?JOptionPane.INFORMATION_MESSAGE);
}?else?{
JOptionPane.showMessageDialog(null,?"錯誤",?"提示",?JOptionPane.ERROR_MESSAGE);
text1.setText("");
text2.setText("");
}
}
});
jFrame.add(button);
jFrame.setVisible(true);
}
}
我有一個微信公眾號,經(jīng)常會分享一些Java技術(shù)相關的干貨,還有一些學習資源。
如果你喜歡我的分享,可以用微信搜索“Java團長”或者“javatuanzhang”關注。
你要先學會截圖哦,你發(fā)的看不清楚,重新寫了一個你參考參考!
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("注冊賬戶");
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="卡片類型1,卡片類型2,卡片類型3,卡片類型4,卡片類型5";
jcb=new JComboBox(str.split(","));
labelId=new JLabel("賬號: ");
labelName=new JLabel("姓名: ");
labelPass=new JLabel("密碼: ");
labelMoney=new JLabel("開戶金額:");
labelSelect=new JLabel("存款類型:");
labelCar=new JLabel("卡片類型:");
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("確定"));
jp7.add(new JButton("取消"));
}
public static void main(String[] args) {
new Day30A();
}
}
網(wǎng)頁題目:后臺登錄界面java代碼,java登陸界面代碼
文章分享:http://chinadenli.net/article46/dsgsjeg.html
成都網(wǎng)站建設公司_創(chuàng)新互聯(lián),為您提供動態(tài)網(wǎng)站、商城網(wǎng)站、網(wǎng)站維護、企業(yè)網(wǎng)站制作、建站公司、網(wǎng)站內(nèi)鏈
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)