jtable表头渲染器

来源：互联网发布：matlab数据采集工具箱编辑：程序博客网时间：2024/04/30 10:04

重写表头渲染器：

package cn.ait.amfp.ui.util;

import java.awt.Color;
import java.awt.Component;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.RowSorter;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.plaf.UIResource;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;

/**
* @version 1.13 05/05/07
*/
public class DefaultTableCellHeaderRenderer extends DefaultTableCellRenderer
implements UIResource {
private boolean horizontalTextPositionSet;

    public DefaultTableCellHeaderRenderer() {
        setHorizontalAlignment(JLabel.CENTER);
    }

    public void setHorizontalTextPosition(int textPosition) {
        horizontalTextPositionSet = true;
        super.setHorizontalTextPosition(textPosition);
    }

    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        Icon sortIcon = null;

boolean isPaintingForPrint = false;

        if (table != null) {
            JTableHeader header = table.getTableHeader();
            if (header != null) {
                Color fgColor = null;
                Color bgColor = null;
                if (hasFocus) {
                    fgColor = UIManager
                            .getColor("TableHeader.focusCellForeground");
                    bgColor = UIManager
                            .getColor("TableHeader.focusCellBackground");
                }
                if (fgColor == null) {
                    fgColor = header.getForeground();
                }
                if (bgColor == null) {
                    bgColor = header.getBackground();
                }
                setForeground(fgColor);
                setBackground(bgColor);

setFont(header.getFont());

isPaintingForPrint = header.isPaintingForPrint();
}

            if (!isPaintingForPrint && table.getRowSorter() != null) {
                if (!horizontalTextPositionSet) {
                    // There is a row sorter, and the developer hasn't
                    // set a text position, change to leading.
                    setHorizontalTextPosition(JLabel.LEADING);
                }
                java.util.List<? extends RowSorter.SortKey> sortKeys = table
                        .getRowSorter().getSortKeys();
                if (sortKeys.size() > 0
                        && sortKeys.get(0).getColumn() == table
                                .convertColumnIndexToModel(column)) {
                    switch (sortKeys.get(0).getSortOrder()) {
                    case ASCENDING:
                        sortIcon = UIManager.getIcon("Table.ascendingSortIcon");
                        break;
                    case DESCENDING:
                        sortIcon = UIManager
                                .getIcon("Table.descendingSortIcon");
                        break;
                    case UNSORTED:
                        sortIcon = UIManager.getIcon("Table.naturalSortIcon");
                        break;
                    }
                }
            }
        }

setText(value == null ? "" : value.toString());
setIcon(sortIcon);

        Border border = null;
        if (hasFocus) {
            border = UIManager.getBorder("TableHeader.focusCellBorder");
        }
        if (border == null) {
            border = UIManager.getBorder("TableHeader.cellBorder");
        }
        setBorder(border);

return this;
}
}

在表格中添加渲染器：

        Jtable filenametable = new JTable();// 表格
        DefaultTableCellHeaderRenderer headRender = new DefaultTableCellHeaderRenderer();//创建渲染器
        headRender.setHorizontalAlignment(JLabel.CENTER);//表头居中
        filenametable.getTableHeader().setDefaultRenderer(headRender);// 添加渲染器
        filenametable
                .setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);//设置选择模式

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