java - 删除 JAX-WS 消息中的 XML 声明

Question

我正在尝试使用 Java 代码调用 Web 服务。因此，我使用 JAX-WS 和 JAXB 从 wsdl 文件生成对象。

当我调用 Web 服务时，它会响应以下错误:

Exception in thread "main" javax.xml.ws.soap.SOAPFaultException: The [javax.xml.transform.TransformerException] occurred during XSLT transformation:  javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: The XML declaration must end with "?>".

Exception in thread "main" javax.xml.ws.soap.SOAPFaultException: The [javax.xml.transform.TransformerException] occurred during XSLT transformation:  javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: The XML declaration must end with "?>".
at com.sun.xml.ws.fault.SOAP11Fault.getProtocolException(SOAP11Fault.java:189)
at com.sun.xml.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:122)
at com.sun.xml.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:119)
at com.sun.xml.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:89)
at com.sun.xml.ws.client.sei.SEIStub.invoke(SEIStub.java:118)

因此，我使用wireshark 分析了正在发送的xml 消息。并尝试用soapUI重新发送它。

并发现我的xml包含xml声明

<?xml version='1.0' encoding='UTF-8'?>

当我从 SoapUI 中删除它并重新发送它时。消息正常。

我的java代码是这样的:

public static Data receiveSIBS(webserviceclient.Data input) {

    webserviceclient.Starter service = new webserviceclient.Starter();
    webserviceclient.PortType port = service.getSOAPEventSource();

    BindingProvider bp = (BindingProvider) port;
    bp.getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, endpoint);

    return port.receiveSIBS(input);
}

如果没有这个 xml 声明，如何用 Java 生成消息？因为xml消息都是用JAX-WS和JAXB生成的。

提前致谢!

Answer 1

找到了我自己的解决方案!

首先，正如其他文章中提到的，我实现了一个 SOAPHandler 来编辑这两个属性:

soapMsg.setProperty(SOAPMessage.CHARACTER_SET_ENCODING, "UTF-16");
soapMsg.setProperty(SOAPMessage.WRITE_XML_DECLARATION, "false");

但是，虽然这两个属性改变了handleMessage()方法中的消息实例，但它不会像这样发送，而是发送带有默认xml声明的消息。

解决方案不是设置此属性，而是设置这两个 NamespaceDeclaration:

SOAPEnvelope env = sp.getEnvelope();
env.addNamespaceDeclaration("xsd", "http://www.w3.org/2001/XMLSchema");
env.addNamespaceDeclaration("xsi", "http://www.w3.org/2001/XMLSchema-instance");

我不明白为什么我们会收到“XML 声明必须以“?>”结尾”错误。因为我的解决方案没有删除 xml 声明。可能与xml结构有关(但我没有足够的知识来确认它)。

我需要引用http://blog.jdevelop.eu/?p=67这篇文章让我了解了这个解决方案，一些调试代码来自这篇文章。

接下来，我放置了完整的 CustomHandler 类，以便它可以容纳任何人。

import java.io.ByteArrayOutputStream;
import java.util.Set;
import javax.xml.namespace.QName;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.soap.SOAPPart;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;

/**
 *
 * @author Daniel Chang Yan
 */
public class CustomHandler implements SOAPHandler<SOAPMessageContext> {

public boolean handleMessage(SOAPMessageContext context) {
    Boolean isOutbound
            = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
    if (isOutbound != null && isOutbound) {
        SOAPMessage soapMsg = context.getMessage();
        try {
            //Properties always rewritten by jaxws, no matter what is set here
            //soapMsg.setProperty(SOAPMessage.CHARACTER_SET_ENCODING, "UTF-16");
            //soapMsg.setProperty(SOAPMessage.WRITE_XML_DECLARATION, "false");

            // get SOAP-Part
            SOAPPart sp = soapMsg.getSOAPPart();

            //edit Envelope
            SOAPEnvelope env = sp.getEnvelope();
            env.addNamespaceDeclaration("xsd", "http://www.w3.org/2001/XMLSchema");
            env.addNamespaceDeclaration("xsi", "http://www.w3.org/2001/XMLSchema-instance");

        } catch (SOAPException e) {
            throw new RuntimeException(e);
        }

        // print SOAP-Message
        System.out.println("Direction=outbound (handleMessage)...");
        dumpSOAPMessage(soapMsg);

    } else {
        // INBOUND
        System.out.println("Direction=inbound (handleMessage)...");
        SOAPMessage msg = ((SOAPMessageContext) context).getMessage();
        dumpSOAPMessage(msg);

    }

    return true;
}

public Set<QName> getHeaders() {
    return null;
}

public boolean handleFault(SOAPMessageContext context) {
    System.out.println("ServerSOAPHandler.handleFault");
    boolean outbound = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
    if (outbound) {
        System.out.println("Direction=outbound (handleFault)...");
    } else {
        System.out.println("Direction=inbound (handleFault)...");
    }
    if (!outbound) {
        try {
            SOAPMessage msg = ((SOAPMessageContext) context).getMessage();
            dumpSOAPMessage(msg);
            if (context.getMessage().getSOAPBody().getFault() != null) {
                String detailName = null;
                try {
                    detailName = context.getMessage().getSOAPBody().getFault().getDetail().getFirstChild().getLocalName();
                    System.out.println("detailName=" + detailName);
                } catch (Exception e) {
                }
            }
        } catch (SOAPException e) {
            e.printStackTrace();
        }
    }
    return true;
}

public void close(MessageContext mc) {
}

/**
 * Dump SOAP Message to console
 *
 * @param msg
 */
private void dumpSOAPMessage(SOAPMessage msg) {
    if (msg == null) {
        System.out.println("SOAP Message is null");
        return;
    }
    //System.out.println("");
    System.out.println("--------------------");
    System.out.println("DUMP OF SOAP MESSAGE");
    System.out.println("--------------------");
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        msg.writeTo(baos);
        System.out.println(baos.toString(getMessageEncoding(msg)));

        // show included values
        String values = msg.getSOAPBody().getTextContent();
        System.out.println("Included values:" + values);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * Returns the message encoding (e.g. utf-8)
 *
 * @param msg
 * @return
 * @throws javax.xml.soap.SOAPException
 */
private String getMessageEncoding(SOAPMessage msg) throws SOAPException {
    String encoding = "utf-8";
    if (msg.getProperty(SOAPMessage.CHARACTER_SET_ENCODING) != null) {
        encoding = msg.getProperty(SOAPMessage.CHARACTER_SET_ENCODING).toString();
    }
    return encoding;
}
}