rails bootstrap icon丢失

application.css.scss

@font-face{
  font-family:'Glyphicons Halflings';
  src: url("bootstrap/glyphicons-halflings-regular.eot");
  src: url("bootstrap/glyphicons-halflings-regular.eot?#iefix") format("embedded-opentype"),
       url("bootstrap/glyphicons-halflings-regular.woff") format("woff"),
       url("bootstrap/glyphicons-halflings-regular.ttf") format("truetype"),
       url("bootstrap/glyphicons-halflings-regular.svg#glyphicons_halflingsregular") format("svg")
}