用拦截器修改返回response,对特定的返回进行修改操作

 public Interceptor getSignInInterceptor(){
    Interceptor interceptor = new Interceptor() {
      @Override
      public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        Response response = chain.proceed(request);
        if(request.url().toString().contains(URL)) {
          String json =response.body().string();
          HttpResult<Object> responseResult = JsonUtil.parseJsonToBean(json,HttpResult.class);
          if(responseResult.getCode() == 1508) {
            responseResult.setData(null);
            String responseJson = JsonUtil.parseObjToJson(responseResult);
            ResponseBody myBody = ResponseBody.create(MediaType.get("text/plain"), responseJson);
            return response.newBuilder().body(myBody).build();
          }
          ResponseBody myBody = ResponseBody.create(MediaType.get("text/plain"), json);
          return response.newBuilder().body(myBody).build();
        }
        return response;
      }
    };
    return interceptor;
  }

response.setCharacterEncoding( "UTF-8");
response.setContentType( "application/json; charset=utf-8");
PrintWriter out = null ;
try{
JSONObject res = new JSONObject();
res.put( "success", "false");
res.put( "msg", "xxxx");
out = response.getWriter();
out.append(res.toString());
return false;
}
catch (Excepton e){
e.printStackTrace();
response.sendError( 500);
return false;
}