http post 方法传递参数的2种方式

     try{
		HttpPost httpPost = new HttpPost(url);
		StringEntity stringEntity = new StringEntity(param);//param参数，可以为"key1=value1&key2=value2"的一串字符串
		stringEntity.setContentType("application/x-www-form-urlencoded");
		httpPost.setEntity(stringEntity);
		HttpClient client = new DefaultHttpClient(); 
		HttpResponse httpResponse = client.execute(httpPost);
		String result = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);
	} catch(IOException e){
	}

以android为例吧，有的时候我们不想要通过下面的方式来传递参数，因为考虑ndk的接口时我比较喜欢的方式是直接把key和value连成一串，如"key1=value1&key2=value2"来作为参数，这样http get和post的方法都可以用同样的结构来作为参数，于是http post的方法请求服务器数据时可以用上面的方法来实现.

                List<NameValuePair>list = new ArrayList<NameValuePair>();
		for (int i = 0; i < keys.length; i++) {
			list.add(new BasicNameValuePair(keys[i], values[i]));
		}
		HttpPost httpRequst = new HttpPost(urlString);
		httpRequst.setEntity(new UrlEncodedFormEntity(list,HTTP.UTF_8));

httpRequst.setEntity()这个方法是最主要的post传递的参数实现的方式了（不知道这样说对不对）

httpEntity有AbstractHttpEntity, BasicHttpEntity, BasicManagedEntity, BufferedHttpEntity, ByteArrayEntity, EntityTemplate, FileEntity, HttpEntityWrapper, InputStreamEntity,SerializableEntity, StringEntity, UrlEncodedFormEntity