如何通过css实现以下行内水平均等排布的样式?

<style>
.justify{
display:flex;
display:-webkit-flex;/*Safari*/
justify-content:space-between;/*水平排布方式*/
align-items:center;/*垂直对齐方式*/
}
</style>
<div class="justify">
<span>测试1</span>
<span>测试2</span>
<span>测试3</span>
<span>测试4</span>
</div>

