从服务器A 访问服务器B, 服务器B读服务器A的ip地址，这时候如何将服务器A的ip模拟一个手机ip地址，而不是实际的服务器A地址。

public static String sendWithIP(String url,Map<String,String> map,String encoding,String ip) {
        CloseableHttpResponse response = null;
        String body = "";
        CloseableHttpClient client = HttpClients.custom().setRetryHandler(new DefaultHttpRequestRetryHandler(0,false)).build();
        HttpPost httpPost = new HttpPost(url);

        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        if(map!=null) {
            for(Map.Entry<String,String> entry:map.entrySet()) {
                nvps.add(new BasicNameValuePair(entry.getKey(),entry.getValue()));
            }
        }
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nvps,encoding));
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(10000).setSocketTimeout(10000).build();
            httpPost.setConfig(requestConfig);
            httpPost.addHeader("x-forwarded-for",ip);
            httpPost.addHeader("X-Real-IP",ip);

            response = client.execute(httpPost);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                body = EntityUtils.toString(entity,encoding);
            }
            EntityUtils.consume(entity);
            response.close();

            System.out.println("响应："+body);
            System.out.println("response:"+response.getStatusLine());

        } catch (Exception e) {
            e.printStackTrace();
        }
        return body;
    }

这个方法没有起作用，有没有其他方法，欢迎高手指教。
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