JSON 使用 StAXON 解析 - XMLStreamException 当元素名称中有一个字符时

Question

We are using StAXON (due to its performance via StAX processing) to parse json input which contains colon(:) as element name. Colon is valid element name in JSON but while parsing via StAXON we are getting exception (XMLStreamException).

It works if I use namespaceSeparator as '\0', like new JsonXMLConfigBuilder().namespaceSeparator(Character.MIN_VALUE) . But this just changes the namespace separator.

My Question/Doubt:

1. Is it safe to do this? Are there chances of getting issue(s)
2. Is there a way to ignore colon while parsing (reading/writing) JSON?
3. Is there any other alternative to StAXON to parse JSON based on events like StAX parsing is done for XML.

Sample Input : {"cust:person":{"name":"John Doe","phone":"555-1111"}}

Exception

Exception in thread "main" javax.xml.stream.XMLStreamException: Unbound prefix: cust
at de.odysseus.staxon.base.AbstractXMLStreamScope.verify(AbstractXMLStreamScope.java:212)
at de.odysseus.staxon.base.AbstractXMLStreamScope.setStartTagClosed(AbstractXMLStreamScope.java:234)
at de.odysseus.staxon.base.AbstractXMLStreamReader.ensureStartTagClosed(AbstractXMLStreamReader.java:191)
at de.odysseus.staxon.base.AbstractXMLStreamReader.readStartElementTag(AbstractXMLStreamReader.java:272)
at de.odysseus.staxon.json.JsonXMLStreamReader.readStartElementTag(JsonXMLStreamReader.java:93)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:202)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:153)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:183)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:153)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:183)
at de.odysseus.staxon.base.AbstractXMLStreamReader.initialize(AbstractXMLStreamReader.java:216)
at de.odysseus.staxon.json.JsonXMLStreamReader.initialize(JsonXMLStreamReader.java:87)
at de.odysseus.staxon.json.JsonXMLStreamReader.(JsonXMLStreamReader.java:78)
at de.odysseus.staxon.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:150)
at de.odysseus.staxon.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:45)
at JsonXml.main(JsonXml.java:27)

Thanks

Answer 1

Colon is a legal name character in case the parser is not namespace aware. You should be able to turn off namespace awareness on the underlying XMLInputFactory (don't know the details of StAXON).

Answer 2

It's safe to do this but it's probably not what you want. Since StAXON tries to treat JSON like XML, you should give the library what it wants: A namespace for the „cust“ prefix. Read about StAXON's conventions here .

To declare a namespace:

new JsonXMLConfigBuilder().namespaceMapping(„cust“, „http://example.com/ns/cust“)