okhttp 2.7.* 修改格式编码

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• 还是直接贴代码比较好

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         StringBuffer sb = new StringBuffer();         if (params == null)         {             params = new Param[0];          }         for (Param param : params)         {             sb.append(param.key+"="+param.value+"&");         }         RequestBody body = RequestBody.create(MediaType.parse("application/x-www-form-urlencoded;charset=utf-8"),sb.toString());         return new Request.Builder()                 .url(url)                 .post(body)                 .build();