HttpClient用HttpPost传输中文字符串乱码

public static String getHttpRequestString(String url,String body) throws IOException {
HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);

StringEntity stringEntity = new StringEntity(body);
httpPost.setEntity(stringEntity);
httpPost.setHeader("Content-Type", "application/json; charset=UTF-8");

HttpResponse response = client.execute(httpPost);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line;
StringBuffer jsonString = new StringBuffer();
while((line = bufferedReader.readLine()) != null) {
jsonString.append(line);
}
return jsonString.toString();
}

stringEntity.setContentEncoding("UTF-8");