GBK编码发送接口地址：
http://gbk.sms.webchinese.cn/?Uid=本站用户名&Key=接口安全密码&smsMob=手机号码&smsText=短信内容             
UTF-8编码发送接口地址：
http://utf8.sms.webchinese.cn/?Uid=本站用户名&Key=接口安全密码&smsMob=手机号码&smsText=短信内容
获取短信数量接口地址(UTF8)：
http://sms.webchinese.cn/web_api/SMS/?Action=SMS_Num&Uid=本站用户名&Key=接口安全密码
获取短信数量接口地址(GBK)：
http://sms.webchinese.cn/web_api/SMS/GBK/?Action=SMS_Num&Uid=本站用户名&Key=接口安全密码

提示:HTTP调用URL接口时, 参数值必须URL编码后再调用

多个手机号请用半角,隔开
              如：13888888886,13888888887,1388888888 一次最多对50个手机发送
              短信内容支持长短信，最多300个字，普通短信70个字/条，长短信64个字/条计费

1. ASP 调用例子
<%
              '常用函数
'输入url目标网页地址，返回值getHTTPPage是目标网页的html代码
function   getHTTPPage(url)
              dim Http
              set   Http=server.createobject("MSXML2.XMLHTTP")
              Http.open   "GET",url,false
              Http.send()
              if Http.readystate<>4 then
              exit   function
              end if
              getHTTPPage=bytesToBSTR(Http.responseBody,"GB2312")
              set   http=nothing
              if err.number<>0 then err.Clear
              end   function
              Function BytesToBstr(body,Cset)
              dim objstream
              set objstream =   Server.CreateObject("adodb.stream")
              objstream.Type = 1
              objstream.Mode   =3
              objstream.Open
              objstream.Write body
              objstream.Position =   0
              objstream.Type = 2
              objstream.Charset = Cset
              BytesToBstr =   objstream.ReadText
              objstream.Close
              set objstream = nothing
              End   Function

              '自已组合一下提交的URL加入自己的账号和密码
sms_url="http://sms.webchinese.cn/web_api/?Uid=账号&Key=接口密钥&smsMob=手机号码&smsText=短信内容"
response.write   getHTTPPage(sms_url)
              %>

if(url==null || url.Trim().ToString()=="")
              {
              return   strRet;
              }
              string targeturl =   url.Trim().ToString();
              try
              {
              HttpWebRequest hr =   (HttpWebRequest)WebRequest.Create(targeturl);
              hr.UserAgent = "Mozilla/4.0   (compatible; MSIE 6.0; Windows NT 5.1)";
              hr.Method = "GET";
              hr.Timeout =   30 * 60 * 1000;
              WebResponse hs = hr.GetResponse();
              Stream sr =   hs.GetResponseStream();
              StreamReader ser = new StreamReader(sr,   Encoding.Default);
              strRet = ser.ReadToEnd();
              }
              catch (Exception   ex)
              {
              strRet = null;
              }
              return strRet;
              }

import java.io.UnsupportedEncodingException;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;

public class SendMsg_webchinese {

              public static void main(String[] args)throws Exception
              {

              HttpClient client = new HttpClient();
              PostMethod post = new PostMethod("http://gbk.sms.webchinese.cn");
              post.addRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=gbk");//在头文件中设置转码
NameValuePair[] data ={ new NameValuePair("Uid", "本站用户名"),new NameValuePair("Key", "接口安全密码"),new NameValuePair("smsMob","手机号码"),new NameValuePair("smsText","短信内容")};
post.setRequestBody(data);

              client.executeMethod(post);
              Header[] headers = post.getResponseHeaders();
              int statusCode = post.getStatusCode();
              System.out.println("statusCode:"+statusCode);
              for(Header h : headers)
              {
              System.out.println(h.toString());
              }
              String result = new String(post.getResponseBodyAsString().getBytes("gbk"));
              System.out.println(result);


              post.releaseConnection();

              }

}

jar包下载
commons-logging-1.1.1.jar
commons-httpclient-3.1.jar
commons-codec-1.4.jar

echo Get($url);
              function   Get($url)
              {
              if(function_exists('file_get_contents'))
              {
              $file_contents   = file_get_contents($url);
              }
              else
              {
              $ch = curl_init();
              $timeout =   5;
              curl_setopt ($ch, CURLOPT_URL, $url);
              curl_setopt ($ch,   CURLOPT_RETURNTRANSFER, 1);
              curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT,   $timeout);
              $file_contents =   curl_exec($ch);
              curl_close($ch);
              }
              return $file_contents;
              }