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