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实现Java JTable的应用案例

2014-11-17 09:47 411 查看
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>


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