问题
I have one JTable which show list of book and it can be filtered and sort
BookSwing.java
package com.bookretailer.ui;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.RowFilter;
import javax.swing.RowSorter;
import javax.swing.SortOrder;
import javax.swing.border.TitledBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
import com.bookretailer.modules.Book;
import com.bookretailer.modules.utils.BookDB;
public class BookSwing extends JFrame {
private final static String TITLE = "Book Retailer - Books";
private JPanel jpInfo = new JPanel();
private JTable table;
private JTextField txtFilter;
private TableRowSorter<BookTableModel> sorter;
private BookTableModel bookTableModel;
private List<Book> booksList;
private Book selectedBook;
private ListSelectionModel listSelectionModel;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
BookSwing frame = new BookSwing();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public BookSwing() {
setSize(600, 650);
initData();
jpInfo.setBounds(100, 100, 600, 650);
jpInfo.setLayout(null);
JPanel tbPanel = new JPanel();
tbPanel.setBorder(new TitledBorder(null, "", TitledBorder.LEADING, TitledBorder.TOP, null, null));
tbPanel.setBounds(10, 331, 570, 272);
jpInfo.add(tbPanel);
tbPanel.setLayout(null);
bookTableModel = new BookTableModel(booksList);
table = new JTable();
table.setModel(bookTableModel);
sorter = new TableRowSorter<BookTableModel>(bookTableModel);
table.setAutoCreateRowSorter(true);
table.setRowSorter(sorter);
final JTableHeader header = table.getTableHeader();
header.setDefaultRenderer(new HeaderRenderer(table));
List<RowSorter.SortKey> sortKeyList = new ArrayList<RowSorter.SortKey>();
sortKeyList.add(new RowSorter.SortKey(0, SortOrder.ASCENDING));
sorter.setSortKeys(sortKeyList);
sorter.sort();
sorter.setSortsOnUpdates(true);
txtFilter = new JTextField();
// Whenever filterText changes, invoke newFilter.
txtFilter.getDocument().addDocumentListener(new DocumentListener() {
public void changedUpdate(DocumentEvent e) {
filterBook();
}
public void insertUpdate(DocumentEvent e) {
filterBook();
}
public void removeUpdate(DocumentEvent e) {
filterBook();
}
});
JScrollPane scrollPane = new JScrollPane(table);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
initDetail(table.getSelectedRow());
}
});
scrollPane.setBounds(6, 37, 558, 225);
tbPanel.add(scrollPane);
listSelectionModel = table.getSelectionModel();
table.setSelectionModel(listSelectionModel);
listSelectionModel.addListSelectionListener(new ListSelectionHandler());
table.setSelectionModel(listSelectionModel);
JLabel lblBookFilter = new JLabel("Book Filter");
lblBookFilter.setBounds(10, 10, 78, 25);
tbPanel.add(lblBookFilter);
txtFilter.setBounds(75, 10, 489, 25);
tbPanel.add(txtFilter);
txtFilter.setColumns(10);
getContentPane().add(jpInfo);
}
private void initData() {
booksList = BookDB.getBookList();
}
protected void initDetail(int selectedRow) {
selectedBook = booksList.get(selectedRow);
}
private void refreshTableData() {
table.revalidate();
table.repaint();
table.getSelectionModel().clearSelection();
bookTableModel.fireTableDataChanged();
}
private void filterBook() {
RowFilter<TableModel, Object> rf = null;
// If current expression doesn't parse, don't update.
try {
rf = RowFilter.regexFilter("(?i)" + txtFilter.getText());
} catch (java.util.regex.PatternSyntaxException e) {
return;
}
sorter.setRowFilter(rf);
}
class BookTableModel extends AbstractTableModel {
List<Book> booksList;
String[] headerList = { "Book Code", "Title", "Price" };
Class[] classes = { Integer.class, String.class, Double.class };
public BookTableModel(List<Book> list) {
booksList = list;
}
@Override
public int getColumnCount() {
return headerList.length;
}
@Override
public int getRowCount() {
return booksList.size();
}
@Override
public Class<?> getColumnClass(int arg0) {
// TODO Auto-generated method stub
return classes[arg0];
}
// this method is called to set the value of each cell
@Override
public Object getValueAt(int row, int column) {
Book entity = null;
entity = booksList.get(row);
switch (column) {
case 0:
return entity.getBookId();
case 1:
return entity.getTitle();
case 2:
return entity.getPrice();
default:
return "";
}
}
// This method will be used to display the name of columns
public String getColumnName(int col) {
return headerList[col];
}
@Override
public void setValueAt(Object value, int row, int col) {
Book entity = null;
entity = booksList.get(row);
switch (col) {
case 0:
entity.setBookId((Integer) value);
break;
case 1:
entity.setTitle((String) value);
break;
case 2:
entity.setPrice((Double) value);
break;
default:
break;
}
fireTableCellUpdated(row, col);
}
}
private static class HeaderRenderer implements TableCellRenderer {
TableCellRenderer renderer;
public HeaderRenderer(JTable table) {
renderer = table.getTableHeader().getDefaultRenderer();
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int col) {
return renderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
}
}
class ListSelectionHandler implements ListSelectionListener {
@Override
public void valueChanged(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
ListSelectionModel model = table.getSelectionModel();
int lead = model.getLeadSelectionIndex();
setFields(lead);
}
}
}
private void setFields(int index) {
System.out.println(booksList.get(index).getTitle());
}
}
i want set selectedBook when user clicked on table row it works fine when user doesnt filter or sort data but when user sort data selectedBook is assigned wrong book
how can i make it work so that right book is assigned to selectedBook
回答1:
Use this code:
selectedBook = booksList.get(table.convertRowIndexToModel(selectedRow));
回答2:
You need to translate the row index in the view to an index in your model. These are different things if you allow sorting. This is covered in this question. In your case, you should do:
selectedBook = booksList.get(table.convertRowIndexToModel(selectedRow));
来源：https://stackoverflow.com/questions/10921351/get-object-from-selected-jtable