java JTable 动态颜色行和单元格

JTable color row and cell dynamically

提问by camickr

I want to make a search functionality for JTable object. I have a JTextFiled where i put my text to search. I want to change colors rows and cells which contains this text. Now i'm stuck because i have no idea how to change color dynamically.

我想为 JTable 对象创建一个搜索功能。我有一个 JTextFiled，我可以在其中放置要搜索的文本。我想更改包含此文本的行和单元格的颜色。现在我被卡住了，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;
    }
}

I've tried with something like this but it doesn't work.

我试过这样的事情，但它不起作用。

I tried to call rerender table like this way

我试图像这样调用重新渲染表

 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();

but with no success :(

但没有成功:(

Could you help me?

你可以帮帮我吗？

回答by Guillaume Polet

Here is a working version of your search feature based on the TableCellRenderer. One of the issue you may have hit, is that, although your TableModel contains String, if you use the DefaultTableModel, it always returns Object.classfor all data and the JTablewill therefore use the DefaultTableCellRendererinstead of your TableSearchCellRenderer.

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所有数据，JTable因此将使用DefaultTableCellRenderer代替您的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;

}

回答by camickr

See Table Row Rendering. The example does row level highlighting on a fixed word. You would need to modify the code to do the highlighting on your search word.

请参阅表行渲染。该示例在固定单词上进行行级突出显示。您需要修改代码以突出显示您的搜索词。

Another approach is to filter the table to see only the rows that contain the text you are searching for. See Sorting and Filteringfor a working example.

另一种方法是过滤表格以仅查看包含您要搜索的文本的行。有关工作示例，请参阅排序和过滤。

回答by camickr

It works. I change prepare renderer.

有用。我改变了准备渲染器。

JTable table = new JTable() {
                private static final long serialVersionUID = 1L;

                public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                    Component c = super.prepareRenderer(renderer, row, column);

                    **if (column == 0) {
                        for (int i = 0; i < getModel().getColumnCount(); i++) {
                            if (((TableSearchRenderer) getDefaultRenderer(String.class)).getSearch().length() > 0 && ((TableSearchRenderer) getDefaultRenderer(String.class)).getSearch().toLowerCase().equals(getModel().getValueAt(row, i).toString().toLowerCase()))
                                ((TableSearchRenderer) getDefaultRenderer(String.class)).getRows().add(row);
                        }
                    }**

                    if (((TableSearchRenderer) getDefaultRenderer(String.class)).getRows().contains(row) && c.getBackground() != Color.RED) {
                        c.setBackground(Color.GREEN);
                    }

                    return c;
                }
            };