lost.java

是一个描述饭卡管理系统的软件工程作业,里面有各个阶段的文档介绍.

/*
 * Lost.java
 *
 * Created on 2007年7月15日, 下午8:59
 */

package 饭卡管理系统;
import java.sql.*;
import   javax.swing.JOptionPane; 
/**
 *
 * @author  BT之家会员
 */
public class Lost extends javax.swing.JDialog {
    public static int ids;
    /** Creates new form Lost */
    public Lost(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        this.jButton2.setEnabled(false);
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        jPanel1 = new javax.swing.JPanel();
        num = new javax.swing.JTextField();
        pass = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();

        getContentPane().setLayout(null);

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        jLabel1.setText("\u6b22\u8fce\u8fdb\u5165\u5b66\u751f\u5361\u6302\u5931\u754c\u9762");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(210, 20, 160, 20);

        jPanel1.setLayout(null);

        jPanel1.setBorder(new javax.swing.border.TitledBorder("\u6302\u5931\u4fe1\u606f"));
        jPanel1.add(num);
        num.setBounds(130, 30, 80, 20);

        jPanel1.add(pass);
        pass.setBounds(130, 60, 80, 20);

        jLabel2.setText("\u5b66\u751f\u5b66\u53f7");
        jPanel1.add(jLabel2);
        jLabel2.setBounds(60, 30, 60, 15);

        jLabel3.setText("\u5b66\u751f\u5bc6\u7801");
        jPanel1.add(jLabel3);
        jLabel3.setBounds(60, 60, 60, 15);

        jButton1.setText("\u9501\u5361");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jPanel1.add(jButton1);
        jButton1.setBounds(300, 30, 130, 23);

        jButton2.setText("\u786e\u8ba4\u9501\u5361");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        jPanel1.add(jButton2);
        jButton2.setBounds(300, 60, 130, 23);

        getContentPane().add(jPanel1);
        jPanel1.setBounds(0, 50, 590, 100);

        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-600)/2, (screenSize.height-207)/2, 600, 207);
    }
    // </editor-fold>//GEN-END:initComponents

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
   try{ 
        String sql = "update card_info set lock = 1 where id = "+String.valueOf(ids);
           Main.state.executeUpdate(sql);
           JOptionPane.showMessageDialog(null,"卡已经被锁，如要解锁，请与管理员联系否则10日后 自动注销！");
           this.setVisible(false);
      }catch(SQLException ex){ System.err.println("aq.executeUpdate:"+ex.getMessage());}  
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed

         if(num.getText().equals("") ){
            JOptionPane.showMessageDialog(null,"学生学号不能为空！");
            num.setFocusable(true);
            
        }else{
        
        try{       
            String sql = "select * from student_info where stu_num = "+num.getText();        
               ResultSet  rs = Main.state.executeQuery(sql);
            if(rs.next()){
                if(rs.getString(7).compareTo(pass.getText())==0)
                { 
                 JOptionPane.showMessageDialog(null,"请按确认锁键，确认锁卡！");
                num.setEnabled(false);
                pass.setEnabled(false);
                this.jButton1.setEnabled(false);
                this.jButton2.setEnabled(true);
                ids=rs.getInt(1);
                }else {
                 JOptionPane.showMessageDialog(null,"学生密码错误！");
                }
                
                
            }else{                
            JOptionPane.showMessageDialog(null,"学生学号错误！");
            }
            
        }catch(SQLException ex){ System.err.println("aq.executeQuery:"+ex.getMessage());}
        }
    }//GEN-LAST:event_jButton1ActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Lost(new javax.swing.JFrame(), true).setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JTextField num;
    private javax.swing.JTextField pass;
    // 变量声明结束//GEN-END:variables
    
}