public class XmlService {
  public String query(String num) throws Exception {
    InputStream in = this.getClass().getClassLoader().getResourceAsStream("query.xml");
    byte[] data = LoadUtils.load(in);
    String xml = new String(data);
    //替换
    xml = xml.replace("#", num);
    byte[] sendData = xml.getBytes("UTF-8");
    //发送到代理的地址上
    URL url = new URL("http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Content-Type", "application/soap+xml; charset=utf-8");
    conn.setRequestProperty("Content-Length", String.valueOf(sendData.length));
    //将请求的xml发送出去
    conn.setDoOutput(true);
    conn.getOutputStream().write(sendData);
    //获取从服务器传回来的数据
    if (conn.getResponseCode() == 200)
      return parse(conn.getInputStream());
    return null;
  }
  //解析流拿到getMobileCodeInfoResult中的数据
  private String parse(InputStream inputStream) throws Exception {
    XmlPullParser parser = Xml.newPullParser();
    parser.setInput(inputStream, "UTF-8");
    //查找getMobileCodeInfoResult标签，获取标签中的数据
    for (int event = parser.getEventType(); event != XmlPullParser.END_DOCUMENT; event = parser.next())
      switch (event) {
        case XmlPullParser.START_TAG:
          if ("getMobileCodeInfoResult".equals(parser.getName()))
            return parser.nextText();
      }
    return null;
  }
}

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
 <soap12:Body>
  <getMobileCodeInfo xmlns="http://WebXml.com.cn/">
   <mobileCode>#</mobileCode>
   <userID></userID>
  </getMobileCodeInfo>
 </soap12:Body>
</soap12:Envelope>