public float getRequstURIPath(String prefix, float defvalue) {
        String val = getRequstURIPath(prefix, null);
        try {
            return val == null ? defvalue : Float.parseFloat(val);
        } catch (NumberFormatException e) {
            return defvalue;
        }
    }
public float getRequstURIPath ( String prefix , float defvalue ) { String val = getRequstURIPath ( prefix , null ) ; try { return val == null ? defvalue : Float . parseFloat ( val ) ; } catch ( NumberFormatException e ) { return defvalue ; } }
获取请求URL分段中含prefix段的float值   <br>
例如请求URL /pipes/record/query/point:40.0   <br>
获取time参数: float point = request.getRequstURIPath("point:", 0.0f);

@param prefix   prefix段前缀
@param defvalue 默认float值

@return float值