仅使用html和css，无法更改图像的src。如果您确实将img标签替换为div标签，那么您可以像这样更改设置为背景的图像
div { background: url('http://dummyimage.com/100x100/000/fff');}div:hover { background: url('http://dummyimage.com/100x100/eb00eb/fff');}如果您认为可以使用一些javascript代码，则应该可以如下更改img标签的src
function hover(element) { element.setAttribute('src', 'http://dummyimage.com/100x100/eb00eb/fff');}function unhover(element) { element.setAttribute('src', 'http://dummyimage.com/100x100/000/fff');}<img id="my-img" src="http://dummyimage.com/100x100/000/fff" onmouseover="hover(this);" onmouseout="unhover(this);" />
