Question

我需要通过特定列的值动态过滤我的JTable。所以，如果我有2列，例如＆＃34; Country＆＃34;和＆＃34; Capital＆＃34;，我想只按列Country过滤。我通过实现此代码找到了问题的部分解决方案：

import java.awt.BorderLayout;
import javax.swing.JButton;
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.RowFilter;
import javax.swing.SwingUtilities;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

public class TestTableSortFilter extends JPanel {

    private String[] columnNames
            = {"Country", "Capital", "Population in Millions", "Democracy"};

    private Object[][] data = {
        {"USA", "Washington DC", 280, true},
        {"Canada", "Ottawa", 32, true},
        {"United Kingdom", "London", 60, true},
        {"Germany", "Berlin", 83, true},
        {"France", "Paris", 60, true},
        {"Norway", "Oslo", 4.5, true},
        {"India", "New Delhi", 1046, true}
    };

    private DefaultTableModel model = new DefaultTableModel(data, columnNames);
    private JTable jTable = new JTable(model);

    private TableRowSorter<TableModel> rowSorter
            = new TableRowSorter<>(jTable.getModel());

    private JTextField jtfFilter = new JTextField();
    private JButton jbtFilter = new JButton("Filter");

    public TestTableSortFilter() {
        jTable.setRowSorter(rowSorter);

        JPanel panel = new JPanel(new BorderLayout());
        panel.add(new JLabel("Specify a word to match:"),
                BorderLayout.WEST);
        panel.add(jtfFilter, BorderLayout.CENTER);

        setLayout(new BorderLayout());
        add(panel, BorderLayout.SOUTH);
        add(new JScrollPane(jTable), BorderLayout.CENTER);

        jtfFilter.getDocument().addDocumentListener(new DocumentListener(){

            @Override
            public void insertUpdate(DocumentEvent e) {
                String text = jtfFilter.getText();

                if (text.trim().length() == 0) {
                    rowSorter.setRowFilter(null);
                } else {
                    rowSorter.setRowFilter(RowFilter.regexFilter("(?i)" + text));
                }
            }

            @Override
            public void removeUpdate(DocumentEvent e) {
                String text = jtfFilter.getText();

                if (text.trim().length() == 0) {
                    rowSorter.setRowFilter(null);
                } else {
                    rowSorter.setRowFilter(RowFilter.regexFilter("(?i)" + text));
                }
            }

            @Override
            public void changedUpdate(DocumentEvent e) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

        });
    }

问题是，当我过滤表格时，它会按所有列过滤它，而不是特定列。感谢您的帮助。

Answer 1

阅读Sorting and Filtering上Swing教程中的部分，了解对单个列进行过滤的工作示例。

关键是在创建正则表达式过滤器时指定列。您还可以查看RowFilter.regexFilter(...)参数的API。

Answer 2

下面的静态方法将动态过滤表行。只需传递3个参数即可。
1.JTable tbl>排序表
2. JTextField txtSearch>用于搜索的textField
3.整数SearchColumnIndex>您要搜索的列

 public static void AddFilter(JTable tbl, JTextField txtSearch, Integer SearchColumnIndex) {

        DefaultTableModel model = (DefaultTableModel) tbl.getModel();

        final TableRowSorter< DefaultTableModel> sorter = new TableRowSorter< DefaultTableModel>(model);
        tbl.setRowSorter(sorter);

        txtSearch.getDocument().addDocumentListener(new DocumentListener() {
            @Override
            public void changedUpdate(DocumentEvent e) {
                OnChange();
            }
            @Override
            public void removeUpdate(DocumentEvent e) {
                OnChange();
            }
            @Override
            public void insertUpdate(DocumentEvent e) {
                OnChange();
            }
            public void OnChange() {
                var txt = txtSearch.getText().toLowerCase();
                if (txt.length() == 0) {
                    sorter.setRowFilter(null);
                } else {
                    try {
                        sorter.setRowFilter(RowFilter.regexFilter("^(?i)" + txt, SearchColumnIndex));
                    } catch (PatternSyntaxException pse) {
                        System.out.println("Bad regex pattern");
                    }
                }

            }
        });
    }

按列值动态过滤jTable

2 个答案: