HttpClient post提交数据，汉字转码

public static String post(String url, String data) throws ClientProtocolException, IOException {
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        //设置请求和传输超时时间
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(60000).setConnectTimeout(60000).build();
        httpPost.setConfig(requestConfig);
        httpPost.setHeader("Content-Type","application/json; charset=utf-8");
        httpPost.setEntity(new StringEntity(data.toString(), Charset.forName("UTF-8")));
        HttpResponse response = httpClient.execute(httpPost);
        String httpEntityContent = getHttpEntityContent(response);
        httpPost.abort();
        return httpEntityContent;
    }