在java中用jtable输出的表格怎样改变列宽？解决办法

public static int fitTableColumnsWidth(JTable table) {
        return fitTableColumnsWidth(table, 0);
    }

    /**
     * 自动调整表列宽度
     *
     * @param table          被调整表
     * @param addtionalSpace 额外的宽度
     * @return 总列宽
     */
    public static int fitTableColumnsWidth(JTable table, int addtionalSpace) {
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        JTableHeader header = table.getTableHeader();
        int rowCount = table.getRowCount();

        Enumeration columns = table.getColumnModel().getColumns();
        int totalColumnWidth = 0;
        while (columns.hasMoreElements()) {
            TableColumn column = (TableColumn) columns.nextElement();
            int col = header.getColumnModel().getColumnIndex(column.getIdentifier());
            int width = (int) table.getTableHeader().getDefaultRenderer()
                    .getTableCellRendererComponent(table, column.getIdentifier()
                            , false, false, -1, col).getPreferredSize().getWidth();
            for (int row = 0; row < rowCount; row++) {
                int preferedWidth = (int) table.getCellRenderer(row, col).getTableCellRendererComponent(table,
                        table.getValueAt(row, col), false, false, row, col).getPreferredSize().getWidth();
                width = Math.max(width, preferedWidth);
            }
            header.setResizingColumn(column); // this line is very important
            column.setWidth(width + table.getIntercellSpacing().width + addtionalSpace);
            totalColumnWidth += width + table.getIntercellSpacing().width + addtionalSpace;
        }
        return totalColumnWidth;
    }