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jaxb如何确定汇编对象的名称空间前缀声明列表？我用xjc编译了ebics的java类（ebics schema）。当我为ebicsRequest创建一个实例，它看起来像这样：控制JAXB中的名称空间前缀
<?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>
</ns2:ebicsRequest>
我已经使用了自定义NamespacePrefixMapper宣布为DS和XSI的默认命名空间和前缀。对于名称空间ds，它工作正常。但是对于默认名称空间，它不会。它被宣布一次为ns2，一次为“”，后者来自我的自定义NamespacePrefixMapper.getPreDeclaredNamespaceUris。我在这堂课中玩过很多。此外，我尝试使用package-info.java，但我无法让jaxb使用"http://www.ebics.org/H003"作为默认命名空间。我也不明白的是ns4和ns5的外观，它们完全不属于xml文档。
我NamespacePrefixMapper类是什么样子
public class NamespacePrefixMapperImpl extends NamespacePrefixMapper implements NamespaceContext {
private static final String[] EMPTY_STRING = new String[0];
private Map prefixToUri = null;
private Map uriToPrefix = null;
private void init(){
prefixToUri = new HashMap();
prefixToUri.put("", "http://www.ebics.org/H003");
prefixToUri.put("ds", "http://www.w3.org/2000/09/xmldsig#");
prefixToUri.put("xsi", "http://www.w3.org/2001/XMLSchema-instance");
prefixToUri.put(XMLConstants.XML_NS_PREFIX, XMLConstants.XML_NS_URI );
prefixToUri.put(XMLConstants.XMLNS_ATTRIBUTE , XMLConstants.XMLNS_ATTRIBUTE_NS_URI);
uriToPrefix = new HashMap();
for(String prefix : prefixToUri.keySet()){
uriToPrefix.put(prefixToUri.get(prefix), prefix);
}
}
@Override
public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
if (uriToPrefix == null)
init();
if (uriToPrefix.containsKey(namespaceUri)){
return uriToPrefix.get(namespaceUri);
}
return suggestion;
}
@Override
public String[] getContextualNamespaceDecls() {
// TODO Auto-generated method stub
return EMPTY_STRING;
}
@Override
public String[] getPreDeclaredNamespaceUris() {
// TODO Auto-generated method stub
return EMPTY_STRING;
}
@Override
public String[] getPreDeclaredNamespaceUris2() {
return new String [] {"", prefixToUri.get("")};
}
public String getNamespaceURI(String prefix) {
if (prefixToUri == null)
init();
if (prefixToUri.containsKey(prefix)) {
return prefixToUri.get(prefix);
} else {
return XMLConstants.NULL_NS_URI;
}
}
public String getPrefix(String namespaceURI) {
if (uriToPrefix == null)
init();
if (uriToPrefix.containsKey(namespaceURI)){
return uriToPrefix.get(namespaceURI);
} else {
return null;
}
}
public Iterator getPrefixes(String namespaceURI) {
if (uriToPrefix == null)
init();
List prefixes = new LinkedList();
if (uriToPrefix.containsKey(namespaceURI)){
prefixes.add(uriToPrefix.get(namespaceURI));
}
return prefixes.iterator();
}
}
我使用
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0-b64 (Sun Microsystems Inc.)
Specification-Title: Java Architecture for XML Binding
Specification-Version: 2.0
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: JAXB Reference Implementation
Implementation-Version: 2.0.2
Implementation-Vendor: Sun Microsystems, Inc.
Implementation-Vendor-Id: com.sun
Extension-Name: com.sun.xml.bind
Build-Id: b01
Class-Path: jaxb-api.jar activation.jar jsr173_1.0_api.jar jaxb1-impl.
jar
Name: com.sun.xml.bind.v2.runtime
Implementation-Version: 2.0.2-b01-fcs
请参阅http://stackoverflow.com/questions/1982977/is-it-possible-to-customize-the-namespace-prefix-that-jaxb-uses-when-marshalling – skaffman 2011-02-02 10:47:38
您可否附上您的NamespacePrefixMapper实施？ – sfussenegger 2011-02-02 11:00:20