Spring编码不正确

@RequestMapping(value = "getCategoryAspectValues", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, String> retrieveCategoryAspectValues(@RequestParam long cat, @RequestParam String aspectName) {
        return new GetAspectsTask().getAspectValues(cat, (StringUtils.encodeAspectName(aspectName)));       
    }

当请求URL：如下，解码后的aspectName值为“US Show Size (Women s)”而不是“US Show Size (Women's)”。如果提供不正确编码的原因将会很有帮助。