div三列，中间一列宽度自适应，2边固定

 <div style="color: White;">
        <div style="width: 100%; background-color: black;">
            <div style="width: 200px; background-color: Aqua; float: left;">
                1111111111111111</div>
            <div style="background-color: Purple; margin-left:200px; margin-right:230px;">
                <div style="background-color: Blue; width: 100%; float:left;">
                    22222222222222222
                </div>
            </div>
            <div style="width: 230px; background-color: Fuchsia; float: right;">
                33333333333</div>
        </div>
    </div>