锐客网

  1. 首页 > 生活百科 > it技术 > >

java账号密码登录代码 java账号密码登录代码三次

IT技术密码

模拟一个简单的用户登陆程序，判断登录的用户名和密码是否正确，输出登录判断结果，用java怎么写？package test;\x0d\x0aimport java.util.Scanner;\x0d\x0apublic class TestLogin {\x0d\x0aprivate static final String USERNAME = "Tom";//此处定义用户名\x0d\x0aprivate static final String PASSWORD = "123";//定义密码\x0d\x0apublic static void main(String[] args) {\x0d\x0aScanner sc = new Scanner(System.in);\x0d\x0aSystem.out.print("请输入您的用户名:");\x0d\x0aString username_in = sc.next();\x0d\x0aSystem.out.print("请输入您的密码:");\x0d\x0aString password_in = sc.next();\x0d\x0aif(username_in.equals(USERNAME)password_in.equals(PASSWORD)){\x0d\x0aSystem.out.println("登录成功");\x0d\x0a}else{\x0d\x0aSystem.out.println("用户名或密码错误");\x0d\x0a}\x0d\x0a}\x0d\x0a} \x0d\x0a这是从控制台输入的最简单的方法 。
用JAVA编一个用户登录界面，用户必须输入账号密码才能进入简单代码如下，原本想用弹窗的，懒得写了：
import java.awt.Container;
import java.awt.FlowLayout;
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.JTextField;
public class dengru extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private Container c = null;
private JButton jb = null;
public dengru() {
this.setLayout(new FlowLayout());
jb = new JButton("登入");
jb.addActionListener(this);
this.add(jb);
【java账号密码登录代码 java账号密码登录代码三次】this.setSize(500, 400);
this.setVisible(true);
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
public static void main(String[] args) {
newdengru();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == jb) {
JFrame jf=new JFrame();
c = jf.getContentPane();
c.setLayout(new GridLayout(3,2,2,2));
JLabel jl1 = new JLabel("用户名：");
JLabel jl2 = new JLabel("密码：");
JTextField jtf1 = new JTextField();
JTextField jtf2 = new JTextField();
jtf1.setSize(200, 40);
jtf2.setSize(200, 40);
c.add(jl1);
c.add(jtf1);
c.add(jl2);
c.add(jtf2);
c.add(new JButton("登入"));
jf.setVisible(true);
jf.setSize(300, 100);
jf.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
}
}
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")java账号密码登录代码； \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java账号密码登录代码！"); \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}
JAVA中密码登陆代码怎么写看一下apache httpclientjava账号密码登录代码的包java账号密码登录代码，现成java账号密码登录代码的代码
java账号密码登录代码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java账号密码登录代码三次、java账号密码登录代码的信息别忘了在本站进行查找喔 。

    推荐阅读


    上一篇：鸿蒙系统按键音设置，鸿蒙系统声音调节快捷键

    下一篇：机器人装甲射击游戏下载，机器人装甲车