用xml报文的形式写一个soap协议的java调用接口代码

以下是一个使用Java调用SOAP协议的示例代码：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Iterator;

import javax.xml.namespace.QName;
import javax.xml.soap.*;

public class SOAPClient {

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

        // 创建一个SOAP连接和消息对象
        SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance();
        SOAPConnection soapConnection = soapConnectionFactory.createConnection();
        String url = "http://www.webservicex.net/ConvertWeight.asmx";
        SOAPMessage soapRequest = createSOAPRequest();

        // 发送SOAP请求并获取响应
        SOAPMessage soapResponse = soapConnection.call(soapRequest, url);

        // 处理SOAP响应
        printSOAPResponse(soapResponse);

        // 关闭SOAP连接
        soapConnection.close();
    }

    private static SOAPMessage createSOAPRequest() throws Exception {
        // 创建一个SOAP消息对象
        MessageFactory messageFactory = MessageFactory.newInstance();
        SOAPMessage soapMessage = messageFactory.createMessage();

        // 创建SOAP消息头
        SOAPHeader soapHeader = soapMessage.getSOAPHeader();
        soapHeader.detachNode();

        // 创建SOAP消息体
        SOAPBody soapBody = soapMessage.getSOAPBody();
        QName bodyName = new QName("http://www.webserviceX.NET/", "ConvertWeight", "ns1");
        SOAPBodyElement bodyElement = soapBody.addBodyElement(bodyName);

        // 添加SOAP方法参数
        QName qname = new QName("http://www.webserviceX.NET/", "Weight", "ns1");
        SOAPElement symbol = bodyElement.addChildElement(qname);
        symbol.setValue("100");
        QName fromUnitQname = new QName("FromUnit", "ns1");
        SOAPElement fromUnit = bodyElement.addChildElement(fromUnitQname);
        fromUnit.setValue("Grams");
        QName toUnitQname = new QName("ToUnit", "ns1");
        SOAPElement toUnit = bodyElement.addChildElement(toUnitQname);
        toUnit.setValue("Kilograms");

        // 保存SOAP消息并返回
        soapMessage.saveChanges();
        return soapMessage;
    }

    private static void printSOAPResponse(SOAPMessage soapResponse) throws SOAPException, IOException {
        // 获取SOAP响应的内容
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        soapResponse.writeTo(out);
        String strMsg = new String(out.toByteArray());
        System.out.println(strMsg);
    }
}

在上面的代码中，我们首先创建了一个SOAP连接工厂和SOAP连接对象。然后，我们使用createSOAPRequest方法创建一个SOAP请求，并将其发送到指定的URL。最后，我们处理SOAP响应并关闭SOAP连接。在createSOAPRequest方法中，我们创建了一个SOAP消息对象，并添加了SOAP消息体和方法参数。在printSOAPResponse方法中，我们从SOAP响应中获取内容并打印出来。