我这里有一个不那么短的工作代码。我的搜索按钮需要帮助。如果我输入textfield并单击搜索按钮，则表格数据应更改为textfield中的内容。如果它没有搜索任何内容，则表格应为空白。我能在这里工作的是将新数据显示在表格中。我应该删除第一个数据然后repaint()吗？或者有更好的解决方案吗？
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
public class TableSearch {
JFrame Card = new JFrame();
static JTable table;
JTabbedPane card_tab = new JTabbedPane(); // FOR TAB
JPanel buttonpanel = new JPanel(); // FOR BUTTON BELOW
FlowLayout flow = new FlowLayout(FlowLayout.LEFT);
Border etch = BorderFactory.createEtchedBorder(Color.white, Color.gray);
Border margin = new EmptyBorder(10, 10, 10, 10);
JTextField text;
public TableSearch() throws SQLException, IOException {
Card.setVisible(true);
Card.setSize(821, 421);
Card.setTitle("File Maintenance");
Card.setResizable(false);
final Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
int x = (int) ((dimension.getWidth() - Card.getWidth()) / 2);
int y = (int) ((dimension.getHeight() - Card.getHeight()) / 2);
Card.setLocation(x, y);
Card.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
JPanel container = new JPanel();
container.setLayout(new BorderLayout());
container.setBackground(new Color(0, 128, 0));
//container.setBorder(margin);
JPanel labelpanel = new JPanel();
labelpanel.setLayout(flow);
labelpanel.setBackground(new Color(0, 128, 0));
JLabel label_1 = new JLabel("Description:");
label_1.setFont(new Font("Calibri", Font.BOLD, 20));
label_1.setForeground(Color.YELLOW);
labelpanel.add(label_1);
text = new JTextField();
text.setPreferredSize(new Dimension(200, 20));
labelpanel.add(text);
JButton btnsearch = new JButton("Search");
btnsearch.setPreferredSize(new Dimension(90, 20));
btnsearch.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
String search = text.getText();
System.out.println(search);
//What should I put here to change the table data???
}
});
labelpanel.add(btnsearch);
JPanel jp1 = new JPanel();
jp1.setBackground(new Color(0, 128, 0));
//jp1.setBorder(new CompoundBorder(etch,margin));
jp1.setLayout(new BorderLayout());
table = new JTable(new TableModel());
JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true);
JTableHeader header = table.getTableHeader();
header.setBackground(new Color(224, 223, 227));
header.setFont(new Font("Calibri", Font.BOLD, 20));
table.setRowHeight(25);
jp1.add(scrollPane);
Card.add(container);
container.add(labelpanel, BorderLayout.PAGE_START);
container.add(jp1, BorderLayout.CENTER);
}
public static class TableModel extends DefaultTableModel {
public TableModel() {
super(new Object[]{"Description", "Code", "Price"}, 0);
for (int index = 0; index < 4; index++) {
addRow(new Object[]{index, index, index});
}
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return false;
}
}
public static void main(String[] args) {
//Use the event dispatch thread for Swing components
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
new TableSearch();
} catch (SQLException ex) {
Logger.getLogger(TableSearch.class.getName())
.log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(TableSearch.class.getName())
.log(Level.SEVERE, null, ex);
}
}
});
}
}
答案 0 :(得分：0)
@mKorbel这是我所做的真正有用的。我将Table Model更改为AbstractModel
public static class JTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private static final String[] COLUMN_NAMES = new String[] {"Description", "PLU Code", "Cash Price"};
private static final Class<?>[] COLUMN_TYPES = new Class<?>[] {String.class, String.class, String.class, String.class};
public int getColumnCount() {
return COLUMN_NAMES.length;
}
public int getRowCount() {
return products.size();
}
@Override public String getColumnName(int columnIndex) {
return COLUMN_NAMES[columnIndex];
}
@Override public Class<?> getColumnClass(int columnIndex) {
return COLUMN_TYPES[columnIndex];
}
public Object getValueAt(final int rowIndex, final int columnIndex) {
switch (columnIndex) {
case 0: return products.get(rowIndex).get("proddesc");
case 1: return products.get(rowIndex).get("prodcode");
case 2: return products.get(rowIndex).get("price");
default: return "Error";
}
}
public void removeRow(int row)
{
products.remove(row);
fireTableRowsDeleted(row, row);
}
}
private static class JTableButtonMouseListener extends MouseAdapter {
private final JTable table;
public JTableButtonMouseListener(JTable table) {
this.table = table;
}
public void mouseClicked(MouseEvent e) {
int column = table.getColumnModel().getColumnIndexAtX(e.getX());
int row = e.getY()/table.getRowHeight();
if (row < table.getRowCount() && row >= 0 && column < table.getColumnCount() && column >= 0) {
Object value = table.getValueAt(row, column);
if (value instanceof JButton) {
((JButton)value).doClick();
}
}
}
}
然后这就是我为搜索按钮所做的事情：
JButton btnsearch = new JButton("Search");
btnsearch.setPreferredSize(new Dimension(90,20));
btnsearch.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
String search = text.getText();
ArrayList<HashMap<String, String>> productSearch = all.posMain.getProductsSearch(search);
System.out.println(productsSearch);
products.clear();
table.repaint();
products = productSearch;
}
});
labelpanel.add(btnsearch);
由于所有内容都存储在Hashmap中，因此我只将第一个hashmap更改为第二个hashmap：products = productSearch;之后一切正常。