单纯的javaee 发送saop请求，求sample 400 请求报错

JDK已经提供了创建和构建 SOAP 消息的 API，简单方便发送 SOAP 消息，具体请参考API即可： http://www.ostools.net/uploads/apidocs/jdk-zh/javax/xml/soap/package-summary.html###### JAX-WS可以用吧，JDK6以上就可以，为啥不使用任何引擎？
关键难点是XML的生成和解析上，没啥难点了 ######因为这个老板的要求，还有就是我只有saop 发送消息格式，没有得到wsdl?

###### 感谢zfc827，以为测试比较困难，有得还不能用。我做了一个sample.可以使用。分享给大家。

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.net.URL;

import javax.xml.soap.MessageFactory;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPConnection;
import javax.xml.soap.SOAPConnectionFactory;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;


public class SendMessageJDK {
  public static void main(String[] args){
String soapReuqest="<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
    soapReuqest+="<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">";
    soapReuqest+="<soap:Body>";
    soapReuqest+="<getRegionCountry xmlns=\"http://WebXml.com.cn/\" />";
    soapReuqest+="</soap:Body></soap:Envelope>";
      try {
        MessageFactory mf = MessageFactory.newInstance();
        SOAPConnection con = SOAPConnectionFactory.newInstance().createConnection();
        MimeHeaders mineHeaders=new MimeHeaders();
        mineHeaders.addHeader("Host", "webservice.webxml.com.cn");
        mineHeaders.addHeader("Content-Type", "text/xml;charset=utf-8");
        mineHeaders.addHeader("SOAPAction","http://WebXml.com.cn/getRegionCountry");
        SOAPMessage reqMessage = mf.createMessage(mineHeaders, new ByteArrayInputStream(soapReuqest.getBytes()));
        //SOAPPart soappart = reqMessage.getSOAPPart();

        System.out.println("\n Soap Request:\n");
        reqMessage.writeTo(System.out);
        System.out.println();

        URL endpoint = new URL("http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx");
        SOAPMessage response = con.call(reqMessage, endpoint);

        // Print response
        System.out.println("\n Soap Response:\n");
        response.writeTo(System.out);
        } catch (SOAPException e) {
        e.printStackTrace();
        } catch (IOException e) {
        e.printStackTrace();
        }
  }
}