Question

在点击Button时,是否可以直接执行QK查询?

例如,在“jDialog”中,我有一个用户名和一个储蓄区。

jButton Action:

@Action
public void saveNewUser() {
  Statement s = con.createStatement();
  s.executeUpdate("INSERT INTO User (username) " + " VALUES ( "+ username + " )")
}

因此,我需要从用户名文本中获取“优势”,但如何?

Answer 1

您应审查Swaing AP。案文领域将是JText 现场。 http://docs.oracle.com/javase/6/docs/api/“rel=“nofollow”http://docs.oracle.com/javase/6/docs/api/。 http://docs/api/javax/swing/JText Field.html

这里有些非常简便的法典是你想要的(我无视布局,i18n,以及其他各种改进):

JTextField usernameTextField = new JTextField("Username:");
JButton saveButton = new JButton("Save");

saveButton.addActionListener(new ActionListener())
{
  public void actionPerformed(ActionEvent e)
  {
    String username = usernameTextField.getText();
    //Put validation code here if you want

    //Then put your SQL insert statement code here
  }
});

//Generally you will be adding them to a JPanel, but can be a JFrame for simple cases
panel.add(usernameTextField);
panel.add(saveButton);

...

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