在Jtable中显示增加删除查询修改的数据库信息

最新推荐文章于 2024-06-14 14:29:02 发布

原创最新推荐文章于 2024-06-14 14:29:02 发布 · 6.2k 阅读

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#数据库 #exception #sql #string #insert #delete

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本文介绍了一个课程管理系统中涉及的数据库操作，包括课程信息的增删改查及考试安排的管理。通过具体代码展示了如何使用Java进行Oracle数据库的交互。

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/**
* 连接数据库函数
*/
public static Connection fetchconnection()
{
  try{
         Class.forName("oracle.jdbc.driver.OracleDriver");
      String url ="jdbc:oracle:thin:@192.168.119.108:1521:orclcn";
   String user = "zenggan";
   String pwd = "zeng";
      return DriverManager.getConnection(url, user, pwd);
  }
  catch(Exception e)
  {
   e.printStackTrace();
   return null;
  }
}

private void addsubinfoButtonActionPerformed(ActionEvent evt) throws Exception {
  /**
   * 插入语句
   */
  Statement statement = null;
  Connection connection =null;
  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "insert into subject values('"+this.sub_idTextField.getText()+"','"+this.sub_nameTextField.getText()+"','"+this.creditTextField.getText()+"')";
      statement.executeUpdate(sql);
      JOptionPane.showMessageDialog(this, "增加成功！！");
      this.sub_idTextField.setText("");
   this.sub_nameTextField.setText("");
   this.creditTextField.setText("");

  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   statement.close();
   connection.close();
  }
}

private void modifysub_infoButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "update subject set sub_name='"+this.editsub_nameTextField.getText()+"' where sub_id='"+this.editsub_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   sql = "update subject set credit='"+this.editcreditTextField.getText()+"' where sub_id='"+this.editsub_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   JOptionPane.showMessageDialog(this,"修改成功!!");
   this.editsub_idTextField.setText("");
   this.editsub_nameTextField.setText("");
   this.editcreditTextField.setText("");
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

public static String[] data = new String[3];//定义一数组存储字段
private void subjectinfoButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  ((DefaultTableModel) this.subjectinfoTable.getModel()).getDataVector().clear();
  this.subjectinfoTable.updateUI();

  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "select * from subject";//查询subject表的所有信息
   resultSet = statement.executeQuery(sql);
     while(resultSet.next()) {
      data[0] = resultSet.getString("sub_id");   //将类型赋值给定义的数组
      data[1] = resultSet.getString("sub_name");
      data[2] = resultSet.getString("credit");
      ((DefaultTableModel) this.subjectinfoTable.getModel()).addRow(data);//table中显示
     }
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

private void deletesub_infoButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "delete subject where sub_id='"+this.editsub_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   JOptionPane.showMessageDialog(this,"删除成功!!");
   this.editsub_idTextField.setText("");
   this.editsub_nameTextField.setText("");
   this.editcreditTextField.setText("");
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

private void addtestButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "insert into test values('"+this.test_idTextField.getText()+"','"+
                                            this.class_idTextField.getText()+"','"+
                                            this.testsub_idTextField.getText()+"','"+
                                            this.teacher_idTextField.getText()+"','"+
                                            this.test_timeTextField.getText()+"','"+
                                            this.test_addressTextArea.getText()+"')";
      statement.executeUpdate(sql);
      JOptionPane.showMessageDialog(this, "增加成功！！");
      this.test_idTextField.setText("");
            this.class_idTextField.setText("");
            this.testsub_idTextField.setText("");
            this.teacher_idTextField.setText("");
            this.test_timeTextField.setText("");
            this.test_addressTextArea.setText("");

  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   statement.close();
   connection.close();
  }
}

public static String[] dataone = new String[6];

private void testinfoButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  ((DefaultTableModel) this.testinfoTable.getModel()).getDataVector().clear();
  this.testinfoTable.updateUI();
  try{
   connection = fetchconnection();
   statement = connection.createStatement();
   String sql = "select * from test";//查询test表的所有信息
   resultSet = statement.executeQuery(sql);
     while(resultSet.next()) {
      dataone[0] = resultSet.getString("test_id");   //将类型赋值给定义的数组
      dataone[1] = resultSet.getString("class_id");
      dataone[2] = resultSet.getString("sub_id");
      dataone[3] = resultSet.getString("teacher_id");
      dataone[4] = resultSet.getString("test_time");
      dataone[5] = resultSet.getString("test_adress");
      ((DefaultTableModel) this.testinfoTable.getModel()).addRow(dataone);//table中显示
     }
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

private void edittestmodifyButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "update test set class_id='"+this.editclass_idTextField.getText()+"' where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   sql = "update test set sub_id='"+this.edittestsub_idTextField.getText()+"' where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   sql = "update test set teacher_id='"+this.edittestteacheridTextField.getText()+"' where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   sql = "update test set test_time='"+this.edittesttimeTextField.getText()+"' where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   sql = "update test set test_adress='"+this.edittestaddressTextArea.getText()+"' where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   JOptionPane.showMessageDialog(this,"修改成功!!");
   this.edittest_idTextField.setText("");
   this.editclass_idTextField.setText("");
   this.edittestsub_idTextField.setText("");
   this.edittestteacheridTextField.setText("");
   this.edittesttimeTextField.setText("");
   this.edittestaddressTextArea.setText("");
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

private void edittestdeleteButtonActionPerformed(ActionEvent evt) throws SQLException {
  Statement statement = null;
  Connection connection =null;
  ResultSet resultSet = null;

  try{
   connection = fetchconnection();
   statement = connection.createStatement();

   String sql = "delete test where test_id='"+this.edittest_idTextField.getText()+"'";
   resultSet = statement.executeQuery(sql);
   JOptionPane.showMessageDialog(this,"删除成功!!");
   this.edittest_idTextField.setText("");
   this.editclass_idTextField.setText("");
   this.edittestsub_idTextField.setText("");
   this.edittestteacheridTextField.setText("");
   this.edittesttimeTextField.setText("");
   this.edittestaddressTextArea.setText("");
  }
  catch(Exception e)
  {
     e.printStackTrace();
  }
  finally{
   resultSet.close();
   statement.close();
   connection.close();
  }
}

private void tuichuButtonActionPerformed(ActionEvent evt) {
  System.exit(0);
}