java - JTable 颜色行和单元格动态

Question

我想为 JTable 对象创建一个搜索功能。我有一个 JTextFiled，我将文本放在其中进行搜索。我想更改包含此文本的行和单元格的颜色。现在我卡住了，因为我不知道如何动态改变颜色。

public class TableSearchCellRenderer extends DefaultTableCellRenderer {
    String search = "";

    public void setSearch(String search) {
        this.search = search;
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        if (table.getValueAt(row, column).equals(search)) {
            setBackground(Color.green);
        }
        return this;
    }
}

我已经尝试过类似的方法，但它不起作用。

我试过这样调用rerender table

 String selectedTitle = tabbed.getTitleAt(tabbed.getSelectedIndex());
 JTable table = tabels.get(selectedTitle);

 ((TableSearchCellRenderer)table.getDefaultRenderer(String.class)).setSearch(searchField.getText());
 table.repaint();
 ((AbstractTableModel) table.getModel()).fireTableDataChanged();

但没有成功:(

你能帮帮我吗？

Answer 1

这是基于 TableCellRenderer 的搜索功能的工作版本。您可能遇到的问题之一是，尽管您的 TableModel 包含字符串，但如果您使用 DefaultTableModel , 它总是返回 Object.class对于所有数据和 JTable因此将使用 DefaultTableCellRenderer而不是你的 TableSearchCellRenderer .

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.util.Random;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;

public class TestTable2 {

    private String search;

    public String getSearch() {
        return search;
    }

    public void setSearch(String search) {
        this.search = search;
    }

    private class TableSearchRenderer extends DefaultTableCellRenderer {

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            setBackground(null);
            Component tableCellRendererComponent = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            if (getSearch() != null && getSearch().length() > 0 && value.toString().contains(getSearch())) {
                setBackground(Color.RED);
            }
            return tableCellRendererComponent;
        }
    }

    protected void initUI() {
        DefaultTableModel model = new DefaultTableModel();
        for (int i = 0; i < 5; i++) {
            model.addColumn("Column " + (i + 1));
        }
        Random random = new Random();
        for (int i = 0; i < 200; i++) {
            Vector<Object> row = new Vector<Object>();
            for (int j = 0; j < 40; j++) {
                row.add(WORDS[random.nextInt(WORDS.length)]);
            }
            model.addRow(row);
        }
        table = new JTable(model);
        TableSearchRenderer renderer = new TableSearchRenderer();
        table.setDefaultRenderer(Object.class, renderer);
        textField = new JTextField(30);
        textField.getDocument().addDocumentListener(new DocumentListener() {

            @Override
            public void removeUpdate(DocumentEvent e) {
                updateSearch();
            }

            @Override
            public void insertUpdate(DocumentEvent e) {
                updateSearch();
            }

            @Override
            public void changedUpdate(DocumentEvent e) {
                updateSearch();
            }
        });
        JFrame frame = new JFrame(TestTable2.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JScrollPane scrollpane = new JScrollPane(table);
        scrollpane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        frame.add(scrollpane, BorderLayout.CENTER);
        frame.add(textField, BorderLayout.NORTH);
        frame.setSize(1000, 800);
        frame.setVisible(true);
    }

    protected void updateSearch() {
        setSearch(textField.getText());
        table.repaint();
    }

    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
            UnsupportedLookAndFeelException {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TestTable2().initUI();
            }
        });
    }

    private static final String[] WORDS = { "art", "australia", "baby", "beach", "birthday", "blue", "bw", "california", "canada", "canon",
            "cat", "chicago", "china", "christmas", "city", "dog", "england", "europe", "family", "festival", "flower", "flowers", "food",
            "france", "friends", "fun", "germany", "holiday", "india", "italy", "japan", "london", "me", "mexico", "music", "nature",
            "new", "newyork", "night", "nikon", "nyc", "paris", "park", "party", "people", "portrait", "sanfrancisco", "sky", "snow",
            "spain", "summer", "sunset", "taiwan", "tokyo", "travel", "trip", "uk", "usa", "vacation", "water", "wedding" };
    private JTable table;
    private JTextField textField;

}