**我已根据收到的帮助和评论更新了我的问题。现在我的问题是： 在调用以下代码后：
SearchBox searchBox = new SearchBox(); // SearchBox extends JDialog
int state = searchBox.showSearchDialog(); // Sets visible to true and returns state
我想让用户在searchBox（JDialog）中输入输入。所以在调用searchBox.showSearchDialog()时基本上“停止”我的JFrame类（不应该这样做吗？在setVisible(true)被调用之后它甚至都没有）。然后，一旦用户在JDialog（searchBox类）中按OK，“恢复”我的JFrame类并调用String query = searchBox.getQuery();。
我认为从searchBox.showSearchDialog（）方法调用正弦setVisible（true）应该暂停，但事实并非如此。我的代码来自：
seachBox = new SearchBox();
int state = seachBox.showSeachDialog();
String query = searchBox.getQuery();
不停地。所以我的查询字符串回来都是错误的，因为在我的代码调用该方法之前，用户从未有机会输入任何内容。
JFrame上课：
import java.awt.Cursor;
@SuppressWarnings（ “串行”） 公共类DataPersistance扩展了JFrame {
private JPanel contentPane;
private JTable table;
private DataPersistanceController controller;
private DatabaseConnector dbConnector;
/**
* Launch the application.
*/
public static void main(String[] args)
{
// Sets the look and feel to be like windows
try
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException e1)
{
e1.printStackTrace();
} catch (InstantiationException e1)
{
e1.printStackTrace();
} catch (IllegalAccessException e1)
{
e1.printStackTrace();
} catch (UnsupportedLookAndFeelException e1)
{
e1.printStackTrace();
}
EventQueue.invokeLater(new Runnable()
{
public void run()
{
try
{
DataPersistance frame = new DataPersistance();
frame.setVisible(true);
} catch (Exception e)
{
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*
* @throws SQLException
*/
public DataPersistance() throws SQLException
{
this.controller = new DataPersistanceController();
this.dbConnector = new DatabaseConnector();
setTitle("Data Persistance Tool - Enterra Solutions, LLC.");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 1000, 750);
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
mnFile.setMnemonic(KeyEvent.VK_F);
menuBar.add(mnFile);
JMenuItem mntmConnect = new JMenuItem("Connect");
mnFile.add(mntmConnect);
JMenuItem mntmExit = new JMenuItem("Exit");
mntmExit.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
dispose();
}
});
mnFile.add(mntmExit);
JMenu mnEdit = new JMenu("Edit");
mnEdit.setMnemonic(KeyEvent.VK_E);
menuBar.add(mnEdit);
JMenuItem mntmCopyResults = new JMenuItem("Copy Results");
mnEdit.add(mntmCopyResults);
JMenu mnTools = new JMenu("Tools");
mnTools.setMnemonic(KeyEvent.VK_T);
menuBar.add(mnTools);
JMenuItem mntmKbLoad = new JMenuItem("Auto Load (from KB)");
mnTools.add(mntmKbLoad);
JMenuItem mntmManualLoadke = new JMenuItem("Manual Load (.ke file)");
mntmManualLoadke.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser fChoose = new JFileChooser();
fChoose.setFileFilter(new FileFilter()
{
@Override
public boolean accept(File f)
{
return (f.isFile()
&& (f.getName().toLowerCase().endsWith(".txt") || f
.getName().toLowerCase()
.endsWith(".ke")) || f.isDirectory());
}
@Override
public String getDescription()
{
return null;
}
});
// showOpenDialog returns some value. Did not use.
fChoose.showOpenDialog(contentPane);
fChoose.setVisible(true);
if (fChoose.getSelectedFile() != null)
{
try
{
setCursor(Cursor
.getPredefinedCursor(Cursor.WAIT_CURSOR));
controller.manuallyLoadRecipes(fChoose
.getSelectedFile());
} catch (FileNotFoundException e1)
{
setCursor(Cursor
.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
JOptionPane
.showMessageDialog(
contentPane,
"There was a problem loading file into the database.",
"Load Error", JOptionPane.ERROR_MESSAGE);
System.out.println("File not found");
return;
} catch (SQLException e1)
{
setCursor(Cursor
.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
JOptionPane
.showMessageDialog(
contentPane,
"There was a problem loading file into the database.",
"Load Error", JOptionPane.ERROR_MESSAGE);
System.out.println("SQL Error");
return;
}
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
JOptionPane.showMessageDialog(contentPane,
"Load was successful.");
}
}
});
mnTools.add(mntmManualLoadke);
JMenuItem mntmGenerateKeText = new JMenuItem("Generate KE Text");
mnTools.add(mntmGenerateKeText);
JMenuItem mntmDeleteRecipies = new JMenuItem("Delete Recipies");
mnTools.add(mntmDeleteRecipies);
JMenu mnSettings = new JMenu("Settings");
mnSettings.setMnemonic(KeyEvent.VK_S);
menuBar.add(mnSettings);
JMenuItem mntmView = new JMenuItem("View");
mnSettings.add(mntmView);
JMenuItem mntmConnectionPreferences = new JMenuItem(
"Connection Preferences");
mnSettings.add(mntmConnectionPreferences);
JMenu mnHelp = new JMenu("Help");
mnHelp.setMnemonic(KeyEvent.VK_H);
menuBar.add(mnHelp);
JMenuItem mntmReadmeFile = new JMenuItem("Readme");
mnHelp.add(mntmReadmeFile);
JMenuItem mntmAboutDataPersistance = new JMenuItem("About");
mntmAboutDataPersistance.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
JDialog aboutWindow = new AboutDialog();
aboutWindow.setVisible(true);
}
});
mnHelp.add(mntmAboutDataPersistance);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
GridBagLayout gbl_contentPane = new GridBagLayout();
gbl_contentPane.columnWidths = new int[]
{ 36, 23, 82, 464, 243, 0, 0 };
gbl_contentPane.rowHeights = new int[]
{ 0, 0, 0, 9, 127, 0, 0, 0, 0, 0 };
gbl_contentPane.columnWeights = new double[]
{ 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, Double.MIN_VALUE };
gbl_contentPane.rowWeights = new double[]
{ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, Double.MIN_VALUE };
contentPane.setLayout(gbl_contentPane);
JToolBar toolBar = new JToolBar();
toolBar.setFloatable(false);
GridBagConstraints gbc_toolBar = new GridBagConstraints();
gbc_toolBar.anchor = GridBagConstraints.LINE_START;
gbc_toolBar.gridwidth = 6;
gbc_toolBar.insets = new Insets(0, 0, 5, 0);
gbc_toolBar.gridx = 0;
gbc_toolBar.gridy = 0;
contentPane.add(toolBar, gbc_toolBar);
JButton btnNewButton = new JButton("Search");
btnNewButton.setHorizontalAlignment(SwingConstants.LEFT);
btnNewButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
// TODO when search button is clicked
SearchBox searchBox = new SearchBox();
int state = searchBox.showSearchDialog();
String query = searchBox.getQuery();
if (state == searchBox.OK_STATE)
{
try
{
ResultSet results = dbConnector.executeQuery(query);
DefaultTableModel tm = (DefaultTableModel) table
.getModel();
table.setModel(DbUtils.resultSetToTableModel(results));
tm.fireTableDataChanged();
} catch (SQLException e1)
{
e1.printStackTrace();
}
}
}
});
toolBar.add(btnNewButton);
JSeparator separator = new JSeparator();
GridBagConstraints gbc_separator = new GridBagConstraints();
gbc_separator.fill = GridBagConstraints.HORIZONTAL;
gbc_separator.gridwidth = 6;
gbc_separator.insets = new Insets(0, 0, 5, 5);
gbc_separator.gridx = 0;
gbc_separator.gridy = 1;
contentPane.add(separator, gbc_separator);
JLabel lblNewLabel = new JLabel("Data Persistance Tool");
GridBagConstraints gbc_lblNewLabel = new GridBagConstraints();
gbc_lblNewLabel.gridwidth = 6;
gbc_lblNewLabel.insets = new Insets(0, 0, 5, 0);
gbc_lblNewLabel.gridx = 0;
gbc_lblNewLabel.gridy = 2;
contentPane.add(lblNewLabel, gbc_lblNewLabel);
lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 35));
// ========= CREATE JTABLE AND POPULATE WIH MODEL =========
table = new JTable();
table.setModel(dbConnector.getAllFromDatabaseTableModel());
table.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
if (e.getClickCount() == 2)
{
JTable target = (JTable) e.getSource();
int row = target.getSelectedRow();
int column = target.getSelectedColumn();
// do some action
}
}
});
// table.setMinimumSize(new Dimension(200, 400));
// table.setPreferredSize(new Dimension(200, 600));
table.setAutoCreateRowSorter(true);
table.setFillsViewportHeight(true);
table.getColumnModel().getColumn(0).setPreferredWidth(10);
table.getColumnModel().getColumn(1).setPreferredWidth(5);
// table = new JTable();
GridBagConstraints gbc_table = new GridBagConstraints();
gbc_table.insets = new Insets(0, 0, 5, 0);
gbc_table.gridwidth = 6;
gbc_table.gridheight = 4;
gbc_table.fill = GridBagConstraints.BOTH;
gbc_table.gridx = 0;
gbc_table.gridy = 4;
// TODO Lines commented because of memory
// insert table inside scrollpane
JScrollPane scrollPane = new JScrollPane(table);
// add table inside scrollpane
contentPane.add(scrollPane, gbc_table);
JLabel lblV = new JLabel("v1.0.0 - Enterra Solutions, LLC.");
GridBagConstraints gbc_lblV = new GridBagConstraints();
gbc_lblV.gridwidth = 6;
gbc_lblV.gridx = 0;
gbc_lblV.gridy = 8;
contentPane.add(lblV, gbc_lblV);
JButton btnRefresh = new JButton("Refresh");
btnRefresh.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
DefaultTableModel tm = (DefaultTableModel) table.getModel();
table.setModel(dbConnector.getAllFromDatabaseTableModel());
tm.fireTableDataChanged();
} catch (SQLException e1)
{
e1.printStackTrace();
}
}
});
toolBar.add(btnRefresh);
}
}
现在，JDialogSearch框出现了。这是完整的课程：
import java.awt.BorderLayout;
@SuppressWarnings("serial")
public class SearchBox extends JDialog
{
private final JPanel contentPanel = new JPanel();
private JTextField textFieldGUID;
private JTextField textFieldTitle;
private JTextField textFieldCallsFor;
private JTextField textFieldContains;
public static final int OK_STATE = 0;
public static final int CANCEL_STATE = 1;
private int state = CANCEL_STATE;
String query;
/**
* Launch the application.
*/
public static void main(String[] args)
{
try
{
SearchBox dialog = new SearchBox();
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setVisible(true);
} catch (Exception e)
{
e.printStackTrace();
}
}
/**
* Create the dialog.
*/
public SearchBox()
{
setBounds(100, 100, 350, 300);
getContentPane().setLayout(new BorderLayout());
contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
getContentPane().add(contentPanel, BorderLayout.WEST);
GridBagLayout gbl_contentPanel = new GridBagLayout();
gbl_contentPanel.columnWidths = new int[]
{ 50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 20 };
gbl_contentPanel.rowHeights = new int[]
{ 34, 0, 0, 0, 0, 0, 0, 0, 20 };
gbl_contentPanel.columnWeights = new double[]
{ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 1.0, 0.0,
Double.MIN_VALUE };
gbl_contentPanel.rowWeights = new double[]
{ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE };
contentPanel.setLayout(gbl_contentPanel);
JLabel lblNewLabel = new JLabel("Recipe Search");
lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 15));
GridBagConstraints gbc_lblNewLabel = new GridBagConstraints();
gbc_lblNewLabel.anchor = GridBagConstraints.NORTH;
gbc_lblNewLabel.gridwidth = 14;
gbc_lblNewLabel.insets = new Insets(0, 0, 5, 0);
gbc_lblNewLabel.gridx = 0;
gbc_lblNewLabel.gridy = 0;
contentPanel.add(lblNewLabel, gbc_lblNewLabel);
final JCheckBox chckbxGuid = new JCheckBox("GUID");
GridBagConstraints gbc_chckbxGuid = new GridBagConstraints();
gbc_chckbxGuid.anchor = GridBagConstraints.WEST;
gbc_chckbxGuid.insets = new Insets(0, 0, 5, 5);
gbc_chckbxGuid.gridx = 0;
gbc_chckbxGuid.gridy = 1;
contentPanel.add(chckbxGuid, gbc_chckbxGuid);
textFieldGUID = new JTextField();
GridBagConstraints gbc_textField = new GridBagConstraints();
gbc_textField.gridwidth = 11;
gbc_textField.insets = new Insets(0, 0, 5, 5);
gbc_textField.fill = GridBagConstraints.HORIZONTAL;
gbc_textField.gridx = 2;
gbc_textField.gridy = 1;
contentPanel.add(textFieldGUID, gbc_textField);
textFieldGUID.setColumns(10);
final JCheckBox chckbxTitle = new JCheckBox("Title");
GridBagConstraints gbc_chckbxTitle = new GridBagConstraints();
gbc_chckbxTitle.anchor = GridBagConstraints.WEST;
gbc_chckbxTitle.insets = new Insets(0, 0, 5, 5);
gbc_chckbxTitle.gridx = 0;
gbc_chckbxTitle.gridy = 2;
contentPanel.add(chckbxTitle, gbc_chckbxTitle);
textFieldTitle = new JTextField();
GridBagConstraints gbc_textField_1 = new GridBagConstraints();
gbc_textField_1.gridwidth = 11;
gbc_textField_1.insets = new Insets(0, 0, 5, 5);
gbc_textField_1.fill = GridBagConstraints.HORIZONTAL;
gbc_textField_1.gridx = 2;
gbc_textField_1.gridy = 2;
contentPanel.add(textFieldTitle, gbc_textField_1);
textFieldTitle.setColumns(10);
final JCheckBox chckbxCallsFor = new JCheckBox("Calls for");
GridBagConstraints gbc_chckbxCallsFor = new GridBagConstraints();
gbc_chckbxCallsFor.anchor = GridBagConstraints.WEST;
gbc_chckbxCallsFor.insets = new Insets(0, 0, 5, 5);
gbc_chckbxCallsFor.gridx = 0;
gbc_chckbxCallsFor.gridy = 3;
contentPanel.add(chckbxCallsFor, gbc_chckbxCallsFor);
textFieldCallsFor = new JTextField();
GridBagConstraints gbc_textField_2 = new GridBagConstraints();
gbc_textField_2.gridwidth = 11;
gbc_textField_2.insets = new Insets(0, 0, 5, 5);
gbc_textField_2.fill = GridBagConstraints.HORIZONTAL;
gbc_textField_2.gridx = 2;
gbc_textField_2.gridy = 3;
contentPanel.add(textFieldCallsFor, gbc_textField_2);
textFieldCallsFor.setColumns(10);
final JCheckBox chckbxContains = new JCheckBox("Contains ");
GridBagConstraints gbc_chckbxContains = new GridBagConstraints();
gbc_chckbxContains.insets = new Insets(0, 0, 5, 5);
gbc_chckbxContains.gridx = 0;
gbc_chckbxContains.gridy = 4;
contentPanel.add(chckbxContains, gbc_chckbxContains);
textFieldContains = new JTextField();
GridBagConstraints gbc_textField_3 = new GridBagConstraints();
gbc_textField_3.gridwidth = 11;
gbc_textField_3.insets = new Insets(0, 0, 5, 5);
gbc_textField_3.fill = GridBagConstraints.HORIZONTAL;
gbc_textField_3.gridx = 2;
gbc_textField_3.gridy = 4;
contentPanel.add(textFieldContains, gbc_textField_3);
textFieldContains.setColumns(10);
JButton btnNewButton = new JButton("Search");
btnNewButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
// TODO when search button is clicked
query = "SELECT * FROM `temp`.`KB_Recipies`";
// add WHERE if needed
if (chckbxGuid.isSelected() || chckbxTitle.isSelected()
|| chckbxCallsFor.isSelected()
|| chckbxContains.isSelected())
{
query += " WHERE ";
}
// --------------------
if (chckbxGuid.isSelected())
{
query += "fpItemGUID=" + textFieldGUID.getText();
// add AND if needed
if (chckbxTitle.isSelected() || chckbxCallsFor.isSelected()
|| chckbxContains.isSelected())
{
query += " AND ";
}
}
if (chckbxTitle.isSelected())
{
query += "recipeTitle=" + textFieldTitle.getText();
// add AND if needed
if (chckbxCallsFor.isSelected()
|| chckbxContains.isSelected())
{
query += " AND ";
}
}
// if (chckbxCallsFor.isSelected())
// {
// query += "fpItemGUID=" + textFieldGUID.getText();
// // add AND if needed
// if (chckbxContains.isSelected())
// {
// query += " AND ";
// }
// }
// if (chckbxContains.isSelected())
// {
// query += "fpItemGUID=" + textFieldGUID.getText();
// }
query += ";";
state = OK_STATE;
dispose();
}
});
GridBagConstraints gbc_btnNewButton = new GridBagConstraints();
gbc_btnNewButton.insets = new Insets(0, 0, 5, 5);
gbc_btnNewButton.gridwidth = 14;
gbc_btnNewButton.gridx = 0;
gbc_btnNewButton.gridy = 6;
contentPanel.add(btnNewButton, gbc_btnNewButton);
}
public boolean isBoxSelected()
{
return true;
}
public String getQuery()
{
return this.query;
}
public int showSearchDialog()
{
// Other setup...
setVisible(true);
return state;
}
}
答案 0 :(得分：5)
你的对话框需要提供一些呼叫者可以调用的getter来恢复状态......
public class JDialogSearch ... {
public static final int OK_STATE = 0;
public static final int CANCEL_STATE = 1;
// Cause it's really nice to know what the use did
// ie canceled, okay'ed, didn't find results, what ever...
private int state = CANCEL_STATE;
private String searchResult;
//....///
OK.addActionListener( new ActionListener() {
private class OKListener implements ActionListener
{
public void actionPerformed(ActionEvent e) {
searchResult = someSearchField.getText(); // Or what ever you need
state = OK_STATE;
dispose(); // close window
}
}
});
//...//
public int showSearchDialog() {
// Other setup...
setVisible(true);
return state;
}
public String getSearchResult() {
return searchResult;
}
然后在您的通话代码中，您可以致电showSearchDialog，如果用户点击Ok，请获取搜索结果...
JDialogSeach dialog = new JDialogSeach(); // seach box implementation of JDialog
switch (dialog.showSearchDialog()) {
case JDialogSeach.OK_STATE:
mySearchResult = dialog.getSearchResult();
break;
}
dialog.setVisible(true);
当然，您可以简单地使用JOptionPane，但这取决于您的要求。
查看How to make Dialogs了解详情
<强>更新
为了在对话框可见时暂停应用程序执行，您需要进行模态对话。
在对话框构造函数中，您应该调用setModal(true)，这将在上一节末尾提供的链接中详细讨论