「java窗口登陆」登录java实现
本篇文章给大家谈谈java窗口登陆,以及登录java实现对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。
本文目录一览:
java窗口登录问题
ResultSet rs=st.executeQuery("select * from XTDL where xuehao='"+myckstr+"' and password='"+checkstr+"'");
rs.next();
if(rs.next()){
Statement st1=con.createStatement();
ResultSet rs1=st1.executeQuery("select * from XTDL where quanxian='学生'");
rs1.next();
if(rs1.next()){
myframe1 = new MyJFrame();////登录系统的主窗体
this.setVisible(false);
dispose();
}
Statement st11=con.createStatement();
ResultSet rs11=st11.executeQuery("select * from XTDL where quanxian='老师'");
rs11.next();
if(rs11.next()){
myframe2 = new GengGaiTuBiao();////登录系统的主窗体
this.setVisible(false);
dispose();
}
}
else{
JOptionPane.showMessageDialog(null,"用户名或密码输入错误!");
tfPass.setText("");
}
}
JAVA 制作登陆窗口
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Login extends JFrame{
nbsp;public Login() {
nbsp;nbsp;setLayout(new GridLayout(1,2));//网格布局,1行2列,放置左面板和右面板
nbsp;nbsp;setTitle("发表iPhone说说");//设置窗口标题
nbsp;nbsp;setSize(550,300);//设置大小
nbsp;nbsp;setLocationRelativeTo(null);//设置窗口位置
nbsp;nbsp;setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗口关闭按钮动作
nbsp;nbsp;//左面板
nbsp;nbsp;JPanel leftPanel = new JPanel();
nbsp;nbsp;leftPanel.setBorder(BorderFactory.createTitledBorder("登录手机腾讯网"));//给左面板加上边框,并添加文字
nbsp;nbsp;leftPanel.setLayout(new BorderLayout());
nbsp;nbsp;JPanel leftPanelTop = new JPanel();
nbsp;nbsp;JPanel leftPanelBottom = new JPanel();
nbsp;nbsp;leftPanel.add(leftPanelTop, BorderLayout.CENTER);
nbsp;nbsp;leftPanel.add(leftPanelBottom, BorderLayout.SOUTH);
nbsp;nbsp;leftPanelTop.setLayout(new GridLayout(3,2));//网格布局,3行2列
nbsp;nbsp;nbsp;nbsp;nbsp;
nbsp;nbsp;//========================请在下面写上你的代码
nbsp;nbsp;JLabel qq = new JLabel("QQ号码");
nbsp;nbsp;JTextField qqNum = new JTextField();
nbsp;nbsp;JLabel pwd = new JLabel("QQ密码");
nbsp;nbsp;JPasswordFieldnbsp; qqPwd = new JPasswordField();
nbsp;nbsp;JLabel verify = new JLabel("验证码");
nbsp;nbsp;JTextField qqVer = new JTextField();
nbsp;nbsp;leftPanelTop.add(qq);
nbsp;nbsp;leftPanelTop.add(qqNum);
nbsp;nbsp;leftPanelTop.add(pwd);
nbsp;nbsp;leftPanelTop.add(qqPwd);
nbsp;nbsp;leftPanelTop.add(verify);
nbsp;nbsp;leftPanelTop.add(qqVer);
nbsp;nbsp;leftPanelBottom.setLayout(new GridLayout(1,2));
nbsp;nbsp;JLabel i_vc = new JLabel(new ImageIcon("images/VerificationCode.jpg"));//这是显示验证码的标签,帮你写好了,后面直接调用即可。
nbsp;nbsp;JButton bt1 = new JButton("帐号密码登陆");
nbsp;nbsp;JButton bt2 = new JButton("带验证码登陆");
nbsp;nbsp;JPanel btPanel = new JPanel();
nbsp;nbsp;btPanel.setLayout(new GridLayout(2,1));
nbsp;nbsp;btPanel.add(bt1);
nbsp;nbsp;btPanel.add(bt2);
nbsp;nbsp;leftPanelBottom.add(i_vc);
nbsp;nbsp;leftPanelBottom.add(btPanel);
nbsp;nbsp;//============================================
nbsp;nbsp;add(leftPanel);//将左面板放入窗体中
nbsp;nbsp;//右面板
nbsp;nbsp;JPanel rightPanel = new JPanel();
nbsp;nbsp;rightPanel.setBorder(BorderFactory.createTitledBorder("发表iPhone说说"));//给右面板加上边框,并添加文字
nbsp;nbsp;//========================请在下面写上你的代码
nbsp;nbsp;JTextArea msg = new JTextArea();
nbsp;nbsp;JButton submit = new JButton("马上发表说说");
nbsp;nbsp;rightPanel.setLayout(new BorderLayout());
nbsp;nbsp;rightPanel.add(msg, BorderLayout.CENTER);
nbsp;nbsp;rightPanel.add(submit, BorderLayout.SOUTH);
nbsp;nbsp;//============================================
nbsp;nbsp;add(rightPanel);//将右面板放入窗体中
nbsp;nbsp;setVisible(true);//使窗体可见
nbsp;}
nbsp;public static void main(String[] args){
nbsp;nbsp;new Login();
nbsp;}
}
用java怎么实现QQ登录界面?
用java做QQ登录界面的写法如下:
package ch10;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
1、//定义该类继承自JFrame,实现ActionListener接口
public class LoginTest extends JFrame implements ActionListener
{
2、//创建JPanel对象
private JPanel jp=new JPanel();
3、//创建3个标并加入数组
JLabel name = new JLabel("请输入用户名");
JLabel password = new JLabel("请输入密码");
JLabel show = new JLabel("");
private JLabel[] jl={name,password,show};
4、//创建登陆和重置按扭并加入数组
JButton login = new JButton("登陆");
JButton reset = new JButton("重置");
private JButton[] jb={login,reset};
5、//创建文本框以及密码框
private JTextField jName=new JTextField();
private JPasswordField jPassword =new JPasswordField();
public LoginTest()
{
6、//设置布局管理器为空布局,这里自己摆放按钮、标签和文本框
jp.setLayout(null);
for(int i=0;i2;i++)
{
7、//设置标签和按扭的位置与大小
jl[i].setBounds(30,20+40*i,180,20);
jb[i].setBounds(30+110*i,100,80,20);
8、//添加标签和按扭到JPanel容器中
jp.add(jl[i]);
jp.add(jb[i]);
//为2个按钮注册动作事件监听器
jb[i].addActionListener(this);
}
9、//设置文本框的位置和大小,注意满足美观并足够用户名的长度
jName.setBounds(130,15,100,20);
10、//添加文本框到JPanel容器中
jp.add(jName);
11、//为文本框注册动作事件监听器
jName.addActionListener(this);
12、//设置密码框的位置和大小,注意满足美观和足够密码的长度
jPassword.setBounds(130,60,100,20);
13、//添加密码框到JPanel容器中
jp.add(jPassword);
14、//设置密码框中的回显字符,这里设置美元符号
jPassword.setEchoChar('$');
15、//为密码框注册动作事件监听器
jPassword.addActionListener(this);
16、//设置用于显示登陆状态的标签大小位置,并将其添加进JPanel容器
jl[2].setBounds(10,180,270,20);
jp.add(jl[2]);
17、//添加JPanel容器到窗体中
this.add(jp);
18、//设置窗体的标题、位置、大小、可见性及关闭动作
this.setTitle("登陆窗口");
this.setBounds(200,200,270,250);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
19、//实现动作监听器接口中的方法actionPerformed
public void actionPerformed(ActionEvent e)
{
20、//如果事件源为文本框
if(e.getSource()==jName)
{
21、//切换输入焦点到密码框
jPassword.requestFocus();
}
22、//如果事件源为重置按扭
else if(e.getSource()==jb[1])
{
23、//清空姓名文本框、密码框和show标签中的所有信息
jl[2].setText("");
jName.setText("");
jPassword.setText("");
24、//让输入焦点回到文本框
jName.requestFocus();
}
25、//如果事件源为登陆按钮,则判断登录名和密码是否正确
else
{
26、//判断用户名和密码是否匹配
if(jName.getText().equals("lixiangguo")
String.valueOf(jPassword.getPassword()).equals("19801001"))
{
27、jl[2].setText("登陆成功,欢迎您的到来!");
}
else
{
28、jl[2].setText("对不起,您的用户名或密码错误!");
}
}
}
public static void main(String[] args)
{
29、//创建LoginTest窗体对象
new LoginTest();
}
}
java登陆窗口
用JCreator创建一个JFC工程,会出现两个java文件,只改其中一个就行了.....-------------------------/**
* @(#)TestFrame.java
*
* JFC Test application
*
* @author
* @version 1.00 2010/5/30
*/import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestFrame extends JFrame {
/**
* The constructor
*/
public TestFrame() {
JLabel lblUserName = new JLabel("用户名");
final JTextField txtUserName = new JTextField(); // 用户名
JLabel lblPassword = new JLabel("密码");
final JPasswordField pwfPassword = new JPasswordField(); // 密码
JButton btnLogin = new JButton("确定");
btnLogin.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (!txtUserName.getText().equals("111") || !pwfPassword.getText().equals("111")) {
JOptionPane.showMessageDialog(null, "用户名或密码错误", "错误", JOptionPane.ERROR_MESSAGE);
} else {
JOptionPane.showMessageDialog(null, "成功登陆", "正确", JOptionPane.INFORMATION_MESSAGE);
}
}
});
JButton btnCancel = new JButton("取消");
btnCancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
TestFrame.this.windowClosed();
}
}); // Add window listener.
this.addWindowListener
(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
TestFrame.this.windowClosed();
}
}
);
GroupLayout layout = new GroupLayout(this.getContentPane());
this.getContentPane().setLayout(layout);
layout.setAutoCreateGaps(true);
layout.setAutoCreateContainerGaps(true); GroupLayout.SequentialGroup hGroup = layout.createSequentialGroup();
hGroup.addGroup(layout.createParallelGroup().addComponent(lblUserName).addComponent(lblPassword));
hGroup.addGroup(layout.createParallelGroup().addComponent(txtUserName, GroupLayout.PREFERRED_SIZE, 170,
GroupLayout.PREFERRED_SIZE).addComponent(pwfPassword, GroupLayout.PREFERRED_SIZE, 170,
GroupLayout.PREFERRED_SIZE).addGroup(GroupLayout.Alignment.CENTER,
layout.createSequentialGroup().addComponent(btnLogin).addComponent(btnCancel)));
layout.setHorizontalGroup(hGroup); GroupLayout.SequentialGroup vGroup = layout.createSequentialGroup();
vGroup.addGap(15);
vGroup.addGroup(layout.createParallelGroup(GroupLayout.Alignment.CENTER).addComponent(lblUserName)
.addComponent(txtUserName, GroupLayout.PREFERRED_SIZE, 25,
GroupLayout.PREFERRED_SIZE));
vGroup.addGroup(layout.createParallelGroup(GroupLayout.Alignment.CENTER).addComponent(lblPassword)
.addComponent(pwfPassword, GroupLayout.PREFERRED_SIZE, 25,
GroupLayout.PREFERRED_SIZE));
vGroup.addGroup(layout.createParallelGroup(GroupLayout.Alignment.CENTER).addComponent(btnLogin).addComponent(
btnCancel));
layout.setVerticalGroup(vGroup);
setTitle("登陆");
setSize(new Dimension(250, 150));
setLocationRelativeTo(null);
}
/**
* Shutdown procedure when run as an application.
*/
protected void windowClosed() {
// TODO: Check if it is safe to close the application
// Exit application.
System.exit(0);
}
}
java窗口登陆的介绍就聊到这里吧,感谢你花时间阅读本站内容,更多关于登录java实现、java窗口登陆的信息别忘了在本站进行查找喔。
发布于:2022-12-28,除非注明,否则均为
原创文章,转载请注明出处。