HttpClient设置发送内容的编码格式

	/**
	 * 根据url获取输入流(POST),https,利用HttpClient
	 * 
	 * @param url
	 * @param content
	 * @param accessToken
	 * @return
	 * @throws IOException
	 * @throws NoSuchProviderException
	 * @throws NoSuchAlgorithmException
	 * @throws KeyManagementException
	 */
	public static InputStream getHttpsInputStreamByHttpClient(String url, String content)
			throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
		String action = url;
		CloseableHttpClient httpclient = HttpClients.custom().build();
		HttpPost httpPost=new HttpPost(url);
		StringEntity stringEntity=new StringEntity(content.toString(),"utf-8"); //这里设置发送内容的编码格式
		httpPost.setEntity(stringEntity);
		CloseableHttpResponse response = httpclient.execute(httpPost);
		HttpEntity entity = response.getEntity();
		return entity.getContent();
	}