java登錄注冊源碼

1. 用java寫一個注冊,登錄程序並連接mysql

假設登陸Oracle的資料庫，連接方式
String driver = "oracle.jdbc.OracleDriver";
Connection cn = null;
Class.forName(driver);
String url = "jdbc:oracle:thin:@localhost:1521:ORACLE";
String user = "system";
String pwd = "密碼";
cn = DriverManager.getConnection(url,user,pwd);
Statement st = cn.createStatement();
String sql = "Insert into loginfo (id,username,user,type) values( "id="+你的id+"username="+user+",password="+pwd+",type="+你的type);
st.executeUpdate(sql);
st.closed;
cn.closed;

Mysql Database
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/資料庫名稱",
"賬戶","密碼");
localhost你的ip地址
3306 mysql的資料庫埠號這個不用改

2. 用java寫一個手機商城注冊界面代碼

這篇文章主要介紹了java通過JFrame做一個登錄系統的界面完整代碼示例，具有一定借鑒價值，需要的朋友可以參考下。
在java的JFrame內通過創建匿名對象的方式做登錄界面
package com.sxt;
import java.awt.Container;
import java.awt.GridLayout;
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.JPasswordField;
import javax.swing.JTextField;
public class LoginFrame extends JFrame{
JTextField txtname=new JTextField();
JPasswordField txtpass=new JPasswordField();
JButton bl=new JButton("登錄");
JButton bg=new JButton("關閉");
//構造無參構造器把主要的方法放在構造器里,然後在main方法裡面調
public LoginFrame(){
setBounds(25,25,250,250);
Container c = getContentPane();
c.setLayout(new GridLayout(4,2,10,10));
c.add(new JLabel("用戶名"));
c.add(txtname);
c.add(new JLabel("密碼"));
c.add(txtpass);
c.add(bl);
c.add(bg);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
//注意：此處是匿名內部類
bg.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
}
);
//注意：此處是匿名內部類
bl.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {

3. JAVA 中 GUI登錄界面設計源代碼

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Login {

private JFrame frame = new JFrame("登錄");
private Container c = frame.getContentPane();
private JTextField username = new JTextField();
private JPasswordField password = new JPasswordField();
private JButton ok = new JButton("確定");
private JButton cancel = new JButton("取消");
public Login(){
frame.setSize(300,200);
c.setLayout(new BorderLayout());
initFrame();
frame.setVisible(true);
}

private void initFrame() {

//頂部
JPanel titlePanel = new JPanel();
titlePanel.setLayout(new FlowLayout());
titlePanel.add(new JLabel("系統管理員登錄"));
c.add(titlePanel,"North");

//中部表單
JPanel fieldPanel = new JPanel();
fieldPanel.setLayout(null);
JLabel l1 = new JLabel("用戶名:");
l1.setBounds(50, 20, 50, 20);
JLabel l2 = new JLabel("密 碼:");
l2.setBounds(50, 60, 50, 20);
fieldPanel.add(l1);
fieldPanel.add(l2);
username.setBounds(110,20,120,20);
password.setBounds(110,60,120,20);
fieldPanel.add(username);
fieldPanel.add(password);
c.add(fieldPanel,"Center");

//底部按鈕
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout());
buttonPanel.add(ok);
buttonPanel.add(cancel);
c.add(buttonPanel,"South");
}

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

}

4. java怎麼通過代碼登入教務系統

我使用幾系統都B/S結構每登錄都需要輸入用戶名密碼覺非麻煩考慮其同事需求妨寫自登錄程序吧前考慮使用單點登錄幾經嘗試放棄

我習慣使用Java本能始尋找Java解決Google輸入Java自登錄、Java網頁模擬登錄、Java Post 登錄結倒少內容差我嘗試終究沒達我預期目標我都知道些代碼應該jsp頁面執行c/s結構程序執行些代碼確實管用

我先析代碼

String surl = "";
URL url = new URL(surl);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter out=new OutputStreamWriter(conn.getOutputStream());
String str = "username=yourname&password=123456";
out.write(str);
out.flush();
out.close();
C/S結構且參數確程序能夠功登錄oa系統要看結通面代碼系統伺服器返結System.out.println()

String sling = "";
String scontent = "";
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
while ((sling = in.readLine()) != null)
scontent += in + "\r\n";
System.out.println(scontent);

C/S結構控制台輸返值返內容看程序已經功登錄要網址瀏覽器打重新登錄問題沒根本解決惡意注冊應該達目

看C/S結構容易實現網頁程序自登錄除非C/S程序內嵌瀏覽器直接瀏覽器自訪問系統應該沒別主要問題於我沒辦共享Session

便於共享Session我能瀏覽器實現網頁自登錄通面代碼jsp頁面測試達預期目標

網頁自登錄希望程序自填充用戶名密碼Post式提交給登錄頁面Form所指向action頁面或我系統登錄頁面源代碼保存網頁usernamepassword文本框設置默認值通網頁登錄系統測試發現行接能已經想解決

我通url.openConnection()建立連接返scontent列印接著列印代碼：
out.println("\r\n");
原理簡單通login.jsp登錄頁面全部源代碼寫前頁面使用javascript腳本用戶名密碼值填充提交表單終於實現自登錄目標現我通特殊網址例自訪問oa
能注意參數url值經加密內容用戶名密碼加效期即效期內鏈接才效才實現自登錄

5. java web 的一個登錄注冊案例，控制台出現At least one JAR was scanned for TLDs yet contained no TLDs

user是一個對象，重寫一下user的tostring方法

6. java編寫一個登陸和注冊信息的源代碼,最簡單的就可以,不需要資料庫的那種

你這個不用資料庫真的是有點難搞

我寫了個用集合存儲的，你看看，能否幫上你

java.util.List<String>list=newArrayList<String>();
list.add("qq=123");//存儲的時候用（用戶名=密碼）的形式
list.add("ww=456");

Stringusername="qq";
Stringpassword="123";
for(inti=0;i<list.size();i++){
Stringnum=username+"="+password;
if(num.equals(list.get(i))){
System.out.println("登錄成功");
break;
}
}

7. JAVA用戶注冊 (我要源代碼)

跑這兒作家庭作業了？ 如果連用哪種頁面技術都不知道提的話，恐怕別人給你源代碼你也看不懂哦，想想別人給你個tapestry、Wicket之類的寫的代碼，拿給老師肯定挨批的喲（一看就露餡了）。

8. Java源代碼：超市會員注冊、登錄、修改、刪除

如果界面做好之後需要填充如下邏輯：

1. 系統應用到的數據表的建立和Dao的操作封裝，小系統建議使用jdbc；

2. 在相應的界面事件監聽中編寫處理數據的邏輯，將需要顯示的數據顯示出來；

3. 雖然業務不是很復雜，也涉及到了角色，許可權，對資料庫的增刪改查等等，建議先把業務邏輯理清在寫程序，會簡單很多

9. 用JAVA語言編程實現一個用戶登錄窗口

方法一：
採用JOptionPane中的一個非常有用的靜態方法 showOptionPane()；
源碼如下：
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JOptionPane;
import javax.swing.BoxLayout;
import javax.swing.Box;
import javax.swing.BorderFactory;
public class Login1 {
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
static void createAndShowGUI() {
JFrame mainFrame = new JFrame();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setBounds(250,250,400,300);
mainFrame.setVisible(false);
usernameField = new JTextField(10);
passwordField = new JPasswordField(10);
Object[] options = {"登錄","取消"};
int i = JOptionPane.showOptionDialog(null,createLoginPanel(),"登錄信息",JOptionPane.DEFAULT_OPTION,JOptionPane.PLAIN_MESSAGE,null,options,options[0]);
if(i==0) {
String username = usernameField.getText();
String password = passwordField.getText();
if(!username.equals("") && !password.equals("")) {
mainFrame.getContentPane().add(new JLabel("用戶名："+username+" 密碼是："+password,JLabel.CENTER));
mainFrame.show();
}
else {
JOptionPane.showMessageDialog(null,"用戶名和密碼不能為空","提示",JOptionPane.WARNING_MESSAGE);
System.exit(1);
}
}
else System.exit(0);
}
static JPanel createLoginPanel() {
JPanel ret = new JPanel();

JPanel usernamePanel = new JPanel();
usernamePanel.add(new JLabel("用戶名：",JLabel.RIGHT));
usernamePanel.add(usernameField);
JPanel passwordPanel = new JPanel();
passwordPanel.add(new JLabel("密 碼：",JLabel.RIGHT));
passwordPanel.add(passwordField);

Box box = new Box(BoxLayout.Y_AXIS);
box.add(usernamePanel); box.add(passwordPanel);
ret.add(box);

ret.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(new Color(244,144,44)),"填寫登錄信息"));
return ret;
}
static JFrame mainFrame = null;
static JTextField usernameField = null;
static JPasswordField passwordField = null;
}
運行：
javac -deprecation Login1.java
java Login
（因為有一個過期的API，所以用了 -deprecation 命令）

方法二，使用了兩個JFrame類共同實現，第一次顯示第一個frame，當點了登錄後且操作合法時，第一個窗口就被釋放了 dispose()；再顯示第二個窗口：
源碼如下：
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
public class Login2 {
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
static void createAndShowGUI() {
//////////////////////////////////////////////////////////////
loginWindow = new JFrame("登錄信息");
loginWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
loginWindow.setBounds(350,350,250,200);
loginWindow.setResizable(false);
JPanel usernamePanel = new JPanel();
usernamePanel.add(new JLabel("用戶名：",JLabel.CENTER));
usernamePanel.add(usernameField);

JPanel passwordPanel = new JPanel();
passwordPanel.add(new JLabel("密 碼：",JLabel.CENTER));
passwordPanel.add(passwordField);
Box box = new Box(BoxLayout.Y_AXIS);
box.add(usernamePanel); box.add(passwordPanel);
JPanel infoPanel = new JPanel();
infoPanel.add(box);
infoPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(new Color(244,144,44)),"填寫登錄信息"));
JButton submitButton = new JButton("登錄");
JButton cancelButton = new JButton("取消");
submitButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
String username = usernameField.getText();
String password = passwordField.getText();

if(!username.equals("") && !password.equals("")) {
loginWindow.dispose();
mainFrame.getContentPane().add(new JLabel("用戶名："+username+" 密碼是："+password,JLabel.CENTER));
mainFrame.setVisible(true);
}
else {
JOptionPane.showMessageDialog(null,"用戶名和密碼不能為空","提示",JOptionPane.WARNING_MESSAGE);
System.exit(1);
}
}
});
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
JPanel buttonPanel = new JPanel();
buttonPanel.add(submitButton); buttonPanel.add(cancelButton);
loginWindow.getContentPane().add(infoPanel,BorderLayout.CENTER);
loginWindow.getContentPane().add(buttonPanel,BorderLayout.SOUTH);
loginWindow.getContentPane().add(new JPanel(),BorderLayout.EAST);
loginWindow.getContentPane().add(new JPanel(),BorderLayout.WEST);
loginWindow.setVisible(true);
/////////////////////////////////////////////////////////////////
mainFrame = new JFrame();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setBounds(250,250,400,300);
mainFrame.setVisible(false);
}
static JFrame loginWindow,mainFrame;
static final JTextField usernameField = new JTextField(10);
static final JPasswordField passwordField = new JPasswordField(10);
}
運行：
javac -deprecation Login2.java
java Login2

10. jsp登陸界面源代碼

1、login.jsp文件

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

<%@ page import="java.util.*" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>登錄頁面</title>

</head>

<body>

<form name="loginForm" method="post" action="judgeUser.jsp">

<table>

<tr>

<td>用戶名:<input type="text" name="userName" id="userName"></td>

</tr>

<tr>

<td>密碼:<input type="password" name="password" id="password"></td>

</tr>

<tr>

<td><input type="submit" value="登錄" style="background-color:pink"> <input

type="reset" value="重置" style="background-color:red"></td>

</tr>

</table>

</form>

</body>

</html>

2、judge.jsp文件

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

<%@ page import="java.util.*" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>身份驗證</title>

</head>

<body>

<%

request.setCharacterEncoding("GB18030");

String name = request.getParameter("userName");

String password = request.getParameter("password");

if(name.equals("abc")&& password.equals("123")) {

3、afterLogin.jsp文件

%>

<jsp:forward page="afterLogin.jsp">

<jsp:param name="userName" value="<%=name%>"/>

</jsp:forward>

<%

}

else {

%>

<jsp:forward page="login.jsp"/>

<%

}

%>

</body>

</html>

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>登錄成功</title>

</head>

<body>

<%

request.setCharacterEncoding("GB18030");

String name = request.getParameter("userName");

out.println("歡迎你:" + name);

%>

</body>

</html>

(10)java登錄注冊源碼擴展閱讀：

java web登錄界面源代碼：

1、Data_uil.java文件

import java.sql.*;

public class Data_uil

{

public Connection getConnection()

{

try{

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

}catch(ClassNotFoundException e)

{

e.printStackTrace();

}

String user="***";

String password="***";

String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=***";

Connection con=null;

try{

con=DriverManager.getConnection(url,user,password);

}catch(SQLException e)

{

e.printStackTrace();

}

return con;

}

public String selectPassword(String username)

{

Connection connection=getConnection();

String sql="select *from login where username=?";

PreparedStatement preparedStatement=null;

ResultSet result=null;

String password=null;

try{

preparedStatement=connection.prepareStatement(sql);

preparedStatement.setString(1,username);

result=preparedStatement.executeQuery();//可執行的 查詢

if(result.next())

password=result.getString("password");

}catch(SQLException e){

e.printStackTrace();

}finally

{

close(preparedStatement);

close(result);

close(connection);

}

System.out.println("找到的資料庫密碼為："+password);

return password;

}

public void close (Connection con)

{

try{

if(con!=null)

{

con.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

public void close (PreparedStatement preparedStatement)

{

try{

if(preparedStatement!=null)

{

preparedStatement.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

public void close(ResultSet resultSet)

{

try{

if(resultSet!=null)

{

resultSet.close();

}

}catch(SQLException e)

{

e.printStackTrace();

}

}

}

2、login_check.jsp:文件

<%@ page language="java" contentType="text/html; charset=utf-8"

pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>驗證用戶密碼</title>

</head>

<body>

<jsp:useBean id="util" class="util.Data_uil" scope="page" />

<%

String username=(String)request.getParameter("username");

String password=(String)request.getParameter("password");

if(username==null||"".equals(username))

{

out.print("<script language='javaScript'> alert('用戶名不能為空');</script>");

response.setHeader("refresh", "0;url=user_login.jsp");

}

else

{

System.out.println("輸入的用戶名:"+username);

String passwordInDataBase=util.selectPassword(username);

System.out.println("密碼："+passwordInDataBase);

if(passwordInDataBase==null||"".equals(passwordInDataBase))

{

out.print("<script language='javaScript'> alert('用戶名不存在');</script>");

response.setHeader("refresh", "0;url=user_login.jsp");

}

else if(passwordInDataBase.equals(password))

{

out.print("<script language='javaScript'> alert('登錄成功');</script>");

response.setHeader("refresh", "0;url=loginSucces.jsp");

}

else

{

out.print("<script language='javaScript'> alert('密碼錯誤');</script>");

response.setHeader("refresh", "0;url=user_login.jsp");

}

}

%>

</body>

</html>

3、loginSucces.jsp文件

<%@ page language="java" contentType="text/html; charset=utf-8"

pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

<hr size="10" width="26%" align="left" color="green">

<font size="6" color="red" >登錄成功 </font>

<hr size="10" width="26%" align="left" color="green">

</body>

</html>

4、user_login.jsp文件

<%@ page language="java" contentType="text/html; charset=utf-8"

pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>登錄界面</title>

</head>

<body background="C:Userswin8workspaceLoginimage\_10.jpg" >

<center>

<br><br><br><br><br><br>

<h1 style="color:yellow">Login</h1>

<br>

<form name="loginForm" action="login_check.jsp" method="post">

<table Border="0" >

<tr >

<td>賬號</td>

<td><input type="text" name="username"></td>

</tr>

<tr>

<td>密碼</td>

<td><input type="password" name="password">

</td>

</tr>

</table>

<br>

<input type="submit" value="登錄" style="color:#BC8F8F">

</form>

</center>

</body>

</html>