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jaxb如何确定编组对象的命名空间前缀声明列表？我使用xjc为ebics(ebics schema)编译java类.当我为ebicsRequest创建一个实例时,它看起来像这样:

<?xml version="1.0" encoding="UTF-16"?>
<ns2:ebicsRequest xmlns:ns2="http://www.ebics.org/H003" Revision="1" Version="H003" xmlns="http://www.ebics.org/H003" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:ns4="http://www.ebics.org/S001" xmlns:ns5="http://www.ebics.org/H000">
    <ns2:header authenticate="true">
        <ns2:static>
            <ns2:HostID>SIZBN001</ns2:HostID>
            <ns2:Nonce>A5488F43223063171CA0FA59ADC635F0</ns2:Nonce>
            <ns2:Timestamp>2009-08-04T08:41:56.967Z</ns2:Timestamp>
            <ns2:PartnerID>EBICS</ns2:PartnerID>
            <ns2:UserID>EBIX</ns2:UserID>
            <ns2:Product Language="de">EBICS-Kernel V2.0.4, SIZ/PPI</ns2:Product>
            <ns2:OrderDetails>
                <ns2:OrderType>FTB</ns2:OrderType>
                <ns2:OrderID>A037</ns2:OrderID>
                <ns2:OrderAttribute>OZHNN</ns2:OrderAttribute>
                <ns2:StandardOrderParams/>
            </ns2:OrderDetails>
            <ns2:BankPubKeyDigests>
                <ns2:Authentication Algorithm="RSA" Version="X002">...</ns2:Authentication>
                <ns2:Encryption Algorithm="RSA" Version="E002">...</ns2:Encryption>
            </ns2:BankPubKeyDigests>
            <ns2:SecurityMedium>0000</ns2:SecurityMedium>
            <ns2:NumSegments>1</ns2:NumSegments>
        </ns2:static>
        <ns2:mutable>
            <ns2:TransactionPhase>Initialisation</ns2:TransactionPhase>
        </ns2:mutable>
    </ns2:header>
    <ns2:AuthSignature>
        <ds:SignedInfo>
            <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
            <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
            <ds:Reference URI="#xpointer(//*[@authenticate='true'])">
                <ds:Transforms>
                    <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
                </ds:Transforms>
                <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
                <ds:DigestValue>CSbjPbiNcFqSl6lCI1weK5x1nMeCH5bTQq5pedq5uI0=</ds:DigestValue>
            </ds:Reference>
        </ds:SignedInfo>
        <ds:SignatureValue>...</ds:SignatureValue>
    </ns2:AuthSignature>
    <ns2:body>
        <ns2:DataTransfer>
            <ns2:DataEncryptionInfo authenticate="true">
                <ns2:EncryptionPubKeyDigest Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" Version="E002">dFAYe281vj9NB7w+VoWIdfHnjY9hNbZLbHsDOu76QAE=</ns2:EncryptionPubKeyDigest>
                <ns2:TransactionKey>...</ns2:TransactionKey>
            </ns2:DataEncryptionInfo>
            <ns2:SignatureData authenticate="true">...</ns2:SignatureData>
        </ns2:DataTransfer>
    </ns2:body> …