使用XMLEventWriter设置独立='YES' [英] Setting standalone = 'YES' using XMLEventWriter

问题描述

我正在使用'XMLEventWriter'来生成Java中的XML文件.代码段如下:

I'm using 'XMLEventWriter' to generate an XML file in Java. Code snippet is as below:

XMLEventWriter writer = outputFactory.createXMLEventWriter(new FileWriter(outFile)); 
XMLEvent startEvent = eventFactory.createStartDocument("UTF-8","1.0",true);
writer.add(startEvent);

尽管将第三个参数设置为"true"，但我看到生成的XML文档的标头没有独立的="YES"

In spite of setting the third argument to 'true', I'm seeing that the generated XML document's header does not have standalone="YES"

有人可以建议要进行更改(如果有)以使standalone ="yes"出现在生成的XML文件的文档标头中吗?

Could anyone suggest the changes (if any) to be made to make standalone="yes" appear in the generated XML file's document header ?

推荐答案

我正在寻找同一个问题(参见

I was looking at the same issue (cf. java StAX - standalone property of StartDocument) and I found that is is unimplemented in my Java version:

软件包:com.sun.xml.internal.stream.writers

类XMLEventWriterImpl

public void add(javax.xml.stream.events.XMLEvent xMLEvent) {
  //...
  case XMLEvent.START_DOCUMENT :{
    //...
    StreamWriter.writeStartDocument(startDocument.getCharacterEncodingScheme(), startDocument.getVersion());

(请注意，此处未使用独立属性)

(note that standalone property is not used here)

然后在下一次通话中(类XMLStreamWriterImpl)

Then in next call (class XMLStreamWriterImpl)

public void writeStartDocument(String encoding, String version)
    throws XMLStreamException {
    //Revisit : What about standalone ?
    //...

这是代码中的原始注释，因此除非使用Java实现，否则尚不受支持.

This is the original comment in the code, so it is unsupported yet unless implemented in Java.

我当前的Java版本是:

My current java version is:

java version "1.7.0_79" OpenJDK Runtime Environment (IcedTea 2.5.5) (7u79-2.5.5-0ubuntu0.14.04.2) OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

java version "1.7.0_79" OpenJDK Runtime Environment (IcedTea 2.5.5) (7u79-2.5.5-0ubuntu0.14.04.2) OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

也许它已在更高版本中修复?

Maybe it has been fixed in a later version ?

编辑

经过测试

java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

问题仍然存在.

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