教师查课.java

经过调查分析

/*
 * 教师查课.java
 *
 * Created on 2008年10月16日, 下午4:25
 */

package javaapplication1;
import java.sql.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
/**
 *
 * @author  mis05
 */
public class 教师查课 extends javax.swing.JPanel {
    
    /** Creates new form 教师查课 */
    public 教师查课() {
        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() {
        jLabel2 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
        jButton1 = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();

        jLabel2.setFont(new java.awt.Font("宋体", 0, 14));
        jLabel2.setText("\u5b66\u5e74");

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "2007\u79cb", "2007\u6625", "2006\u79cb", "2006\u6625", "2005\u79cb" }));

        jButton1.setFont(new java.awt.Font("宋体", 0, 14));
        jButton1.setText("\u67e5\u8be2");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(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(57, 57, 57)
                        .add(jLabel2)
                        .add(25, 25, 25)
                        .add(jComboBox1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 72, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .add(67, 67, 67)
                        .add(jButton1))
                    .add(layout.createSequentialGroup()
                        .add(41, 41, 41)
                        .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 371, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(216, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel2)
                    .add(jComboBox1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(jButton1))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 304, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(74, 74, 74))
        );
    }// </editor-fold>//GEN-END:initComponents

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

     String time=new String(jComboBox1.getSelectedItem().toString());
      String classNumber=null;
      Statement statement;
      String str=null;
      int classLength=0;
      try{
           Connect con=new Connect();
           statement=con.con.createStatement();
          
           StringBuffer results=new StringBuffer();
           
           results.append("课程号"+"\t");
           results.append("课程名"+"\t");
           results.append("授课班级"+"\t");
           results.append("课程学分"+"\t");
           results.append("课程属性"+"\t");
           results.append("考核方式"+"\t");
           results.append("上课时间"+"\t");
           results.append("上课地点"+"\t");
           results.append("\n");
                   
             
           str="SELECT distinct 课程.课程号,课程.课程名,班级.名称,课程.学分,课程.选课属性,课程.考核方式,课表.上课时间,教室.教室地点 FROM 课表,课程,班级,教室,用户 WHERE 课表.教师编号=(SELECT 编号 FROM 用户 WHERE 状态='登录') AND 课程.开课学年='"+time+"' AND 班级.班级编号=课表.班级编号 AND 课程.课程号=课表.课程号  AND 教室.教室编号=课表.教室编号";
           
           ResultSet resultSet=statement.executeQuery(str);
           ResultSetMetaData metaData=resultSet.getMetaData();
           int numberOfColumns=metaData.getColumnCount();
           while(resultSet.next()){
               
             for(int i=1;i<=numberOfColumns;i++)
                results.append(resultSet.getObject(i).toString()+"\t");
               results.append("\n");  
                   }
           
           
           
          jTextArea1.setText(results.toString());
          jTextArea1.setEditable(false);
           
      }
      
      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_jButton1ActionPerformed
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration//GEN-END:variables
    
}