query.java

用java实现了一个学籍管理系统

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * query.java
 *
 * Created on 2009-4-1, 12:42:44
 */

package stuinfomanage;

import java.awt.Color;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Administrator
 */
public class query extends javax.swing.JFrame {

    /** Creates new form query */
    public query() {
        initComponents();
        TA_show.setBackground(Color.WHITE);
        String tittle="学号"+"\t"+"姓名"+"\t"+"性别"+"\t"+"Compiler"+"\t"+"SoftEngineering"+"\n";
        TA_show.append(tittle);
    }

    /** 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.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jScrollPane2 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();
        jScrollPane1 = new javax.swing.JScrollPane();
        TA_show = new javax.swing.JTextArea();
        CB_chose = new javax.swing.JComboBox();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        TF_n = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();

        jList1.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
            public int getSize() { return strings.length; }
            public Object getElementAt(int i) { return strings[i]; }
        });
        jScrollPane2.setViewportView(jList1);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        TA_show.setColumns(20);
        TA_show.setEditable(false);
        TA_show.setRows(5);
        jScrollPane1.setViewportView(TA_show);

        CB_chose.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "学号", "姓名", "性别" }));

        jLabel1.setText("学生信息及成绩查询");

        jLabel2.setText("请选择查询标准：");

        jButton1.setText("查询");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                que(evt);
            }
        });

        jButton2.setText("退出");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                end(evt);
            }
        });

        jLabel3.setText("请输入查询条件：");

        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(17, 17, 17)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 316, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())
                    .add(layout.createSequentialGroup()
                        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 155, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                            .add(layout.createSequentialGroup()
                                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                                    .add(jLabel2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 104, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                    .add(jLabel3))
                                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                                    .add(TF_n, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 103, Short.MAX_VALUE)
                                    .add(CB_chose, 0, 103, Short.MAX_VALUE))
                                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 26, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                                    .add(jButton1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE)
                                    .add(jButton2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 79, Short.MAX_VALUE))))
                        .add(19, 19, 19))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 23, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 106, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(18, 18, 18)
                        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                            .add(jLabel2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 31, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                            .add(CB_chose, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                    .add(layout.createSequentialGroup()
                        .add(10, 10, 10)
                        .add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 33, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                        .add(jLabel3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 18, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .add(TF_n, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(jButton2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 31, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void end(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_end
        // TODO add your handling code here:
        this.setVisible(false);
    }//GEN-LAST:event_end

    private void que(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_que
        // TODO add your handling code here
        int item=0;
        item=CB_chose.getSelectedIndex();
        String query="";
        if(item==0)
            query="学号";
        else if(item==1)
            query="姓名";
        else if(item==2)
            query="性别";
        String n;
        n=TF_n.getText();
        String show="";
        try {
            DataOpera Data = new DataOpera();
            try {
                show=Data.QueryOp(query, n);
            } catch (SQLException ex) {
                Logger.getLogger(query.class.getName()).log(Level.SEVERE, null, ex);
            } catch (Exception ex) {
                Logger.getLogger(query.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(query.class.getName()).log(Level.SEVERE, null, ex);
        }  
        TA_show.append(show);
    }//GEN-LAST:event_que

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new query().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JComboBox CB_chose;
    private javax.swing.JTextArea TA_show;
    private javax.swing.JTextField TF_n;
    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.JList jList1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    // End of variables declaration//GEN-END:variables

}