asstoteacher2.java

学生成绩管理系统

/*
 * Teacher2.java
 *
 * Created on 2007年11月24日, 上午9:49
 */

package javaapplication1;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JOptionPane;

/**
 *
 * @author  mis05
 */
public class Asstoteacher2 extends javax.swing.JFrame {
    
    /** Creates new form Teacher2 */
    public Asstoteacher2() {
        initComponents();
    }
    
    /** 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=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jLabel1.setText("\u6559\u5e08\u7f16\u53f7");

        jButton1.setText("\u5220\u9664");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                delete(evt);
            }
        });

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(103, 103, 103)
                        .add(jLabel1)
                        .add(36, 36, 36)
                        .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 78, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(layout.createSequentialGroup()
                        .add(138, 138, 138)
                        .add(jButton1)))
                .addContainerGap(135, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(87, 87, 87)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(39, 39, 39)
                .add(jButton1)
                .addContainerGap(131, Short.MAX_VALUE))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void delete(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_delete
Statement sql;

        try{
            Conect conect = new Conect();
            sql = conect.dbConn.createStatement();
            
            String number = jTextField1.getText();
            
            if( number.equals("") )
            {
                JOptionPane.showMessageDialog(null,"请输入需要删除的教师编号","错误",JOptionPane.ERROR_MESSAGE);
            }
            else
            {
                String output = null;
                ResultSet rs = sql.executeQuery("select 姓名 from 教师 where 教师编号 = '"+ number +"'" );
                if( rs.next() )
                {
                    output = "已删除编号:"+ number + "  姓名:";
                    output += (String) rs.getObject(1);
                    int reg;
                    reg = sql.executeUpdate("delete from 教师 where 教师编号 = '"+ number +"'");               
                    JOptionPane.showMessageDialog(null,output,"删除成功",JOptionPane.INFORMATION_MESSAGE);                    
                }                
                else JOptionPane.showMessageDialog(null,"不存在此教师编号","错误",JOptionPane.ERROR_MESSAGE);
            }
            dispose();

}
catch(SQLException sqlException){
        JOptionPane.showMessageDialog(null,sqlException.getMessage(),"Database Error",JOptionPane.ERROR_MESSAGE);
        System.exit(1);}
catch(ClassNotFoundException classNotFound){
       JOptionPane.showMessageDialog(null,classNotFound.getMessage(),"Driver Not Found",JOptionPane.ERROR_MESSAGE);
        System.exit(1); }// TODO add your handling code here:
    }//GEN-LAST:event_delete
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Asstoteacher2().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration//GEN-END:variables
    
}