java - 如何获取xml的命名空间

Question

我有这个 xml:

InputStream is = new ByteArrayInputStream(
        "<data:RobCtiAifoData xmlns:data=\"urn:cz:isvs:rob:schemas:RobDotazyData:v1\" xmlns:reg=\"urn:cz:isvs:reg:schemas:RegTypy:v1\" xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:urn=\"urn:cz:isvs:rob:schemas:RobUnivDotazy:v1\"><data:Aifo a=\"b\">1</data:Aifo><data:VyuzitiPoskytnuti>vyuziti</data:VyuzitiPoskytnuti> </data:RobCtiAifoData>"
                .getBytes());

// InputStream is = new ByteArrayInputStream(xml.getBytes());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document document = db.parse(is);
Node node = document.getDocumentElement();

当想获取没有命名空间的元素名称时，我想调用没有前缀的元素名称的子字符串

node.getNodeName() 给我 data:VyuzitiPoskytnuti 而 node.getNamespaceURI() 或 node.getPrefix() 只给我 null。那么我如何获得节点的前缀呢？

Answer 1

尝试启用 namespace 支持:

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();

来自JavaDoc对于 setNamespaceAware:

Specifies that the parser produced by this code will provide support for XML namespaces. By default the value of this is set to false