HttpClient Post请求

doPost(null, "https://www.baidu.com/");

/**
* 访问数据库并返回JSON数据字符串
*
* @param params
* 向服务器端传的参数
* @param url
* @return
* @throws Exception
*/
public static String doPost(List<NameValuePair> params, String url)
throws Exception {
String result = null;
// 获取HttpClient对象
HttpClient httpClient = new DefaultHttpClient();
// 新建HttpPost对象
HttpPost httpPost = new HttpPost(url);
if (params != null) {
// 设置字符集
HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
// 设置参数实体
httpPost.setEntity(entity);
}
// 连接超时
httpClient.getParams().setParameter(
CoreConnectionPNames.CONNECTION_TIMEOUT, 3000);
// 请求超时
httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,
3000);
// 获取HttpResponse实例
HttpResponse httpResp = httpClient.execute(httpPost);
// 判断是够请求成功
if (httpResp.getStatusLine().getStatusCode() == 200) {
// 获取返回的数据
result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
} else {
result = null;
}
return result;

}