正则表达式
有两个正则表达式想请教的:
第一个:
我想截取:alt="http://img.blog.163.net/20170712095836383?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvY25ibG9nZXI=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" class="shrinkToFit" width="334"
中的 http://img.blog.163.net/20170712095836383?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvY25ibG9nZXI=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
这个表达式如何写?
第二个:
我想截取:
里写图片描述](http://img.blog.163.net/20170731131938218?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc3VqdW4xMA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
中的http://img.blog.163.net/20170731131938218?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc3VqdW4xMA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
这表达式如何写?