实现Java JTable的应用案例

代码如下
import Java.awt.Component;

import java.awt.Dimension;

import java.awt.FontMetrics;   

import javax.swing.JLabel;

import javax.swing.JTable;

import javax.swing.UIManager;

import javax.swing.table.DefaultTableCellRenderer;

import javax.swing.table.JTableHeader;

import javax.swing.table.TableColumnModel;   

public class Main extends DefaultTableCellRenderer {

        private static final long serialVersionUID = 1L;

        public Component getTableCellRendererComponent(JTable table, Object value,

            boolean isSelected, boolean hasFocus, int row, int column) {   

        JTableHeader header = table.getTableHeader();

        setForeground(header.getForeground());

        setBackground(header.getBackground());

        setFont(header.getFont());

        setOpaque(true);

        setBorder(UIManager.getBorder("TableHeader.cellBorder"));   

        // 得到列的宽度

        TableColumnModel columnModel = table.getColumnModel();

        int width = columnModel.getColumn(column).getWidth();   

        value = getShowValue(value.toString(), width);

        setText(value.toString());

        setSize(new Dimension(width, this.getHeight()));   

        setHorizontalAlignment(JLabel.CENTER);   

        return this;

    }   

    private Object getShowValue(String value, int colWidth) {

        FontMetrics fm = this.getFontMetrics(this.getFont());

        int width = fm.stringWidth(value.toString());

        int test = fm.stringWidth("好");

        System.out.println(test * value.length());

        System.out.println(width);

        if (width < colWidth) {

            return value;

        }

        StringBuffer sb = new StringBuffer("<html>");

        char str;

        int tempW = 0;

        for (int i = 0; i < value.length(); i++) {

            str = value.charAt(i);

            tempW += fm.charWidth(str);

            if (tempW > colWidth) {

                sb.append("<br>");

                tempW = 0;

            }

            sb.append(str);

        }

        sb.append("</html>");

        return sb.toString();

    }

}
　　运行结果
<ignore_js_op>
详细说明：http://java.662p.com/thread-3683-1-1.html
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实现Java JTable的应用案例

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