stusearch.java

学生成绩管理系统

/*
 * Stusearch.java
 *
 * Created on 2007年11月17日, 上午11:29
 */

package javaapplication1;

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

/**
 *
 * @author  mis05
 */
public class Stusearch extends javax.swing.JPanel {
    
    /** Creates new form Stusearch */
    public Stusearch() {
        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() {
        jButton1 = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();

        jButton1.setText("\u67e5\u8be2\u8bfe\u7a0b\u6210\u7ee9");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                search(evt);
            }
        });

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
        this.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(46, 46, 46)
                        .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 300, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(layout.createSequentialGroup()
                        .add(113, 113, 113)
                        .add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 140, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(54, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(45, 45, 45)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 171, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(22, 22, 22)
                .add(jButton1)
                .addContainerGap(39, Short.MAX_VALUE))
        );
    }// </editor-fold>//GEN-END:initComponents

    private void search(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_search
        Statement sql;
        
        try{
            Conect conect = new Conect();
            sql = conect.dbConn.createStatement();
            StringBuffer output = new StringBuffer();
            String number = null;
            String string1 = null;
            String output1;
            number="select 学生编号 from 学生 where 登录 =1";
            ResultSet resultSet=sql.executeQuery(number);
           
        ResultSetMetaData metaData=resultSet.getMetaData();
        int numberOfColumns=metaData.getColumnCount();
    
        while(resultSet.next()){
        for(int i=1;i<=numberOfColumns;i++)
           string1=resultSet.getObject(i).toString();
       }
        
            int temp = 0;
            ResultSet rs1 = sql.executeQuery("select 课程名,成绩 from 成绩,课程 where 学生编号='"+string1+"' and 成绩.课程编号=课程.课程编号");
            ResultSetMetaData metaData1=rs1.getMetaData();
            int numberOfColumns1=metaData1.getColumnCount();
            for(int i=1;i<=numberOfColumns1;i++)
                output.append(metaData1.getColumnName(i)+"\t\t");
            output.append("\n");
            while( rs1.next() ) {
                 for(int i=1;i<=numberOfColumns1;i++)
               
                output.append(rs1.getObject(i).toString()+"\t");
            output.append("\n");
            }
                                          
            output1 = output.toString();
            jTextArea1.setText( output1 );           
            
        }
        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_search
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration//GEN-END:variables


    
}