 <ul class="nav nav-tabs">
                <li class="nav-item"><a class="nav-link" @click="show=0" :class="{'active':show===0}" href="javascript:">公私钥生成</a></li>
                <li class="nav-item"><a class="nav-link" @click="show=1" :class="{'active':show===1}" href="javascript:">加密解密</a></li>
                <li class="nav-item"><a class="nav-link" @click="show=2" :class="{'active':show===2}" href="javascript:">签名验签</a></li>
                <li class="nav-item"><a class="na