📄 loginframe.java
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/* * To change this template, choose Tools | Templates * and open the template in the editor. */package com.redingsoft.login;import com.redingsoft.locationutil.LocationUtil;import com.redingsoft.mainframe.HotelFrame;import com.redingsoft.sql.SetSQL;import com.redingsoft.sunsdk.swing.OJButton;import com.redingsoft.sunsdk.swing.setimage;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.ResultSet;import javax.swing.*; public class LoginFrame extends JFrame implements ActionListener{ //声明标签 JLabel jl1,jl2,jl3,warnjl; //声明一个文本框 JTextField tf1; JPasswordField tf2; //声明2个按钮 JButton bt1,bt2; //声明面板 JPanel jp0,jp1,jp2,jp3,mainpane; //声明一个整数来计算登录次数 private int count=0; private JPanel jp4; public LoginFrame (){ //实例化标签 // jl1=new JLabel("用户登陆"); jl1=new JLabel("用户名："); jl2=new JLabel(" 密 码："); warnjl=new JLabel(""); //修饰警告标签 warnjl.setForeground(Color.RED); warnjl.setFont(new Font("宋体",Font.BOLD,14)); //实例化文本框 tf1=new JTextField(16); tf2=new JPasswordField(16); //按钮 bt1=new OJButton("com/redingsoft/pic/u02.gif","登录","登陆",true); bt2=new OJButton("com/redingsoft/pic/exit.gif","退出","退出",true); //实例化面板 jp0=new setimage("com/redingsoft/pic/wel_1.gif"); jp1=new JPanel (); jp2=new JPanel (); jp3=new JPanel (); jp4=new JPanel(); mainpane=new JPanel(new FlowLayout(FlowLayout.LEADING,10,1)); //添加组 jp1.add(jl1); jp1.add(tf1); jp2.add(jl2); jp2.add(tf2); jp3.add(bt1); jp3.add(bt2); jp4.add(warnjl); ///////////////// mainpane.add(jp1); mainpane.add(jp2); mainpane.add(jp3); mainpane.add(jp4); /////////// jp3.setPreferredSize(new Dimension(300,40)); jp0.setPreferredSize(new Dimension(300,150)); mainpane.setPreferredSize(new Dimension(300,180)); ///////////////// //添加侦听 bt1.addActionListener(this); bt2.addActionListener(this); this.add(BorderLayout.NORTH,jp0); this.add(BorderLayout.CENTER,mainpane); this.setSize(310,350); this.setDefaultCloseOperation(LoginFrame.EXIT_ON_CLOSE); this.setTitle("红软酒店管理登录"); LocationUtil.setLocation(this); this.setResizable(false); this.setVisible(true); } public static void main(String []aa){ //快闪窗口 startWindow my=new startWindow(); //主窗口 new LoginFrame (); } public void actionPerformed(ActionEvent e) { // throw new UnsupportedOperationException("Not supported yet."); Object o=e.getSource(); String id = tf1.getText().trim(); String pwd=""; char[] pwd1 = tf2.getPassword(); int i= pwd1.length-1; int m=0; while(m<=i){ String str=pwd1[m]+""; pwd+=str; m++; } // System.out.print(pwd); String sql="select userid,pwd from pwd where delmark=0"; if(o==bt1){ try{ ResultSet rs =SetSQL.executeQuery(sql); count++; while(rs.next()){ if(id.equals(rs.getString(1))&&pwd.equals(rs.getString(2))){ rs.close(); new HotelFrame(); this.dispose(); }else{ if(count==3){ JOptionPane.showMessageDialog(null, "<html><body><font color=red size=4>你的输入已经超过3次。<br>系统退出。。。</body></html>"); System.exit(0); }else{ warnjl.setText("<html><body>户名或密码错误!<br><font color=blue>你已经输入【"+count+"】次了，超过</font>【3】<font color=blue>次，<br>系统将会退出。</font></body></html>"); } } //end if(id.equals(rs.getString(1))&&id.equals(rs.getString(2))) } }catch(Exception ex){ // ex.printStackTrace(); } //end try }//end fi(o==bt1) if(o==bt2){ int flag= JOptionPane.showConfirmDialog(null, "确认退出吗？", "提示", JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE); if(flag==JOptionPane.OK_OPTION){ System.exit(0); } } } }⌨️ 快捷键说明
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