java - Stax处理指令

Question

我正在尝试使用 StAX 解析这样的处理指令:

<?item something="<some_element></some_element>"?>

StAX 似乎没有将其识别为处理指令。它发现这些事件:

< - CharacterEvent
?item something=" - CharacterEvent
<some_element> - StartEvent
</some_element> - EndEvent
"?> - CharacterEvent

整个事件不应该被视为单个ProcessingInstruction事件吗？

Answer 1

按我的预期工作。这段代码:

String xml = "<?item something=\"<some_element></some_element>\"?><foo></foo>";
XMLEventReader reader = XMLInputFactory.newInstance().createXMLEventReader(new StringReader(xml));
while (reader.hasNext()) {
    final XMLEvent event = reader.nextEvent();
    System.out.println(event + " - " + event.getClass().getSimpleName());
}

打印此内容:

<?xml version="1.0" encoding='null' standalone='no'?> - StartDocumentEvent
<?itemsomething="<some_element></some_element>"?> - ProcessingInstructionEvent
<foo> - StartElementEvent
</foo> - EndElementEvent
ENDDOCUMENT - EndDocumentEvent

这是 Java 6。您使用的是哪个 Java 版本？