java回登录界面代码 javagui登录界面

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jsp登陆界面源代码

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登录页面/title

/head

body

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

table

td用户名:input type="text" name="userName" id="userName"/td

/tr

td密码:input type="password" name="password" id="password"/td

/tr

tdinput type="submit" value="登录" 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身份验证/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登录成功/title

/head

body

request.setCharacterEncoding("GB18030");

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

out.println("欢迎你:" + name);

/body

/html

扩展资料：

java web登录界面源代码：

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();//可执行的查询

if(result.next())

password=result.getString("password");

}catch(SQLException e){

e.printStackTrace();

}finally

{

close(preparedStatement);

close(result);

close(connection);

}

System.out.println("找到的数据库密码为："+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" ""

html

head

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

title验证用户密码/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('用户名不能为空');/script");

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

}

else

{

System.out.println("输入的用户名:"+username);

String passwordInDataBase=util.selectPassword(username);

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

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

{

out.print("script language='javaScript' alert('用户名不存在');/script");

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

}

else if(passwordInDataBase.equals(password))

{

out.print("script language='javaScript' alert('登录成功');/script");

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

}

else

{

out.print("script language='javaScript' alert('密码错误');/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" ""

html

head

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

titleInsert title here/title

/head

body

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

font size="6" color="red" 登录成功 /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" ""

html

head

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

title登录界面/title

/head

body background="C:\Users\win8\workspace\Login\image\9dcbdc339e72a5663b5c289fb5573c13_10.jpg"

center

brbrbrbrbrbr

h1 style="color:yellow"Login/h1

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

table Border="0"

td账号/td

tdinput type="text" name="username"/td

/tr

td密码/td

tdinput type="password" name="password"

/td

/tr

/table

input type="submit" value="登录" style="color:#BC8F8F"

/form

/center

/body

/html

相关问答

Q1: 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\x0a this.setTitle("用户登录界面");\x0d\x0a this.add(createCenterPane());\x0d\x0a this.setDefaultCloseOperation(this.DO_NOTHING_ON_CLOSE);\x0d\x0a this.setSize(new Dimension(450, 335));\x0d\x0a this.setLocationRelativeTo(null);\x0d\x0a // this.setVisible(true);\x0d\x0a this.addWindowListener(new WindowAdapter() {\x0d\x0a public void windowClosing(WindowEvent e) {\x0d\x0a int choose = JOptionPane.showConfirmDialog(null, "是否要退出登录界面？",\x0d\x0a "系统提示：", JOptionPane.YES_NO_OPTION);\x0d\x0a if (choose == JOptionPane.YES_OPTION) {\x0d\x0a System.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！

Q2: java怎么从主界面返回登录界面

这代码看得好累啊。下次记得要排版！

这里面只有一个类啊，就是你所说的主界面吧？

我理一下你的思路：程序运行时，先出现一个登录界面（假设你已经定义好了，名为LoginFrame），输入正确的用户名与密码，然后再出现这个主界面（NewFrame），然后操作完成后退出登录，返回到登录界面，是吧？

下次，请把自己的问题描述清楚，别人才好帮你。下面回到问题本身。

这个NewFrame类修改一下：

增加一个类字段：

JFrame loginFrame=null;

增加一个重载的构造器：

public NewFrame(JFrame loginFrame)

{

this();//调用无参构造器

this.loginFrame=loginFrame;

}

登录界面调用主界面的代码：

new NewFrame(this);//要用有参的构造器，传递登录界面的引用到主界面对象中

this.setVisible(false);//隐藏登录界面

在主界面返回时的代码：

if(loginFrame!=null) loginFrame.setVisible(true);//显示登录界面

this.dispose();//销毁主界面，也可以用setVisible(false);来隐藏

Q3: 求JAVA实现用户登录界面代码？

java回登录界面代码你要先学会截图哦,你发java回登录界面代码的看不清楚,重新写java回登录界面代码了一个你参考参考!

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();

}

Q4: 求java编写的登陆界面代码

import javax.swing.JFrame;

import javax.swing.JPanel;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.Rectangle;

import java.awt.GridBagLayout;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.JButton;

public class LoginFrame {

private JFrame jFrame = null; // @jve:decl-index=0:visual-constraint="293,25"

private JPanel jContentPane = null;

private JPanel jPanel = null;

private JLabel jLabel = null;

private JLabel jLabel1 = null;

private JTextField jTextField = null;

private JTextField jTextField1 = null;

private JButton jButton = null;

/**

* This method initializes jFrame

* @return javax.swing.JFrame

private JFrame getJFrame() {

if (jFrame == null) {

jFrame = new JFrame();

jFrame.setSize(new Dimension(330, 222));

jFrame.setTitle("登陆");

jFrame.setContentPane(getJContentPane());

}

return jFrame;

}

/**

* This method initializes jContentPane

* @return javax.swing.JPanel

private JPanel getJContentPane() {

if (jContentPane == null) {

jContentPane = new JPanel();

jContentPane.setLayout(null);

jContentPane.add(getJPanel(), null);

}

return jContentPane;

}

/**

* This method initializes jPanel

* @return javax.swing.JPanel

private JPanel getJPanel() {

if (jPanel == null) {

jLabel1 = new JLabel();

jLabel1.setBounds(new Rectangle(45, 76, 54, 22));

jLabel1.setText("密码：");

jLabel = new JLabel();

jLabel.setBounds(new Rectangle(47, 39, 53, 25));

jLabel.setText("用户名：");

jPanel = new JPanel();

jPanel.setLayout(null);

jPanel.setBounds(new Rectangle(2, 7, 305, 167));

jPanel.add(jLabel, null);

jPanel.add(jLabel1, null);

jPanel.add(getJTextField(), null);

jPanel.add(getJTextField1(), null);

jPanel.add(getJButton(), null);

}

return jPanel;

}

/**

* This method initializes jTextField

* @return javax.swing.JTextField

private JTextField getJTextField() {

if (jTextField == null) {

jTextField = new JTextField();

jTextField.setBounds(new Rectangle(106, 40, 154, 24));

}

return jTextField;

}

/**

* This method initializes jTextField1

* @return javax.swing.JTextField

private JTextField getJTextField1() {

if (jTextField1 == null) {

jTextField1 = new JTextField();

jTextField1.setBounds(new Rectangle(105, 76, 154, 23));

}

return jTextField1;

}

/**

* This method initializes jButton

* @return javax.swing.JButton

private JButton getJButton() {

if (jButton == null) {

jButton = new JButton();

jButton.setBounds(new Rectangle(187, 103, 66, 25));

jButton.setText("登陆");

}

return jButton;

}

关于java回登录界面代码和javagui登录界面的介绍到此就结束了，不知道你从中找到你需要的信息了吗？如果你还想了解更多这方面的信息，记得收藏关注本站。

正文

jsp登陆界面源代码

相关问答

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