js篇

        substring: function (str, len, flow) {
            if ( ! str) return '';
            str = str.toString();
            var newStr = "",
                strLength = str.replace(/[^\x00-\xff]/g, "**").length,
                flow = typeof(flow) == 'undefined' ? '...' : flow;

            if (strLength <= len + (strLength % 2 == 0 ? 2 : 1)) return str;

            for (var i = 0, newLength = 0, singleChar; i < strLength; i++) {
                singleChar = str.charAt(i).toString();
                if (singleChar.match(/[^\x00-\xff]/g) != null) newLength += 2;
                else newLength++;

                if (newLength > len) break;
                newStr += singleChar;
            }

            if (strLength > len) newStr = $.trim(newStr) + flow;
            return newStr;
        },

css篇

display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  word-wrap: break-word;
  white-space: normal !important;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;