java之http请求模拟表单提交x-www-form-urlencoded

http请求模拟表单提交：
postman示例：

代码实现：

// 	/**
//	 * 方法名
//	 * @param requestUrl 请求地址	
//	 * @param param1 请求头参数1  
//	 * @param param2 请求头参数2
//	 * */

   public static String postWithParamsForString(String url, String param1,String param2) throws ClientProtocolException, IOException{
    
    
		String jsonStr = "";
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String requestBody = createRequestBody(param1, param2);
		HttpPost httpPost = new HttpPost(url);
		httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
        StringEntity entity = new StringEntity(requestBody);
        httpPost.setEntity(entity);
		CloseableHttpResponse response = httpClient.execute(httpPost);
        jsonStr = EntityUtils.toString(response.getEntity());
        return jsonStr;
	}
	
    private static String createRequestBody(String param1, String param2) {
    
    
        return MessageFormat.format("grant=client&client={0}&clientid={1}", param1, param2);
    }