java - StAX - 使用 XMLStreamWriter 设置版本和编码

Question

我使用 StAX 创建 XML 文件，然后使用 XSD 验证文件。

我在创建 XML 文件时遇到错误:

javax.xml.stream.XMLStreamException: Underlying stream encoding 'Cp1252' and input paramter for writeStartDocument() method 'UTF-8' do not match.
        at com.sun.xml.internal.stream.writers.XMLStreamWriterImpl.writeStartDocument(XMLStreamWriterImpl.java:1182)

这是代码片段:

XMLOutputFactory xof =  XMLOutputFactory.newInstance();

try{

  XMLStreamWriter xtw = xof.createXMLStreamWriter(new FileWriter(fileName));
  xtw.writeStartDocument("UTF-8","1.0");} catch(XMLStreamException e) {
  e.printStackTrace();

} catch(IOException ie) {

  ie.printStackTrace();

}

我在 Unix 上运行这段代码。有人知道如何设置版本和编码风格吗？

Answer 1

我也会尝试使用带有输出参数的 createXMLStreamWriter()。

[编辑] 尝试过，它通过更改 createXMLStreamWriter 行来工作:

XMLStreamWriter xtw = xof.createXMLStreamWriter(new FileOutputStream(fileName), "UTF-8");

[EDIT 2] 进行了一些更复杂的测试，作为记录:

String fileName = "Test.xml";
XMLOutputFactory xof =  XMLOutputFactory.newInstance();
XMLStreamWriter xtw = null;
try
{
  xtw = xof.createXMLStreamWriter(new FileOutputStream(fileName), "UTF-8");
  xtw.writeStartDocument("UTF-8", "1.0");
  xtw.writeStartElement("root");
  xtw.writeComment("This is an attempt to create an XML file with StAX");

  xtw.writeStartElement("foo");
  xtw.writeAttribute("order", "1");
    xtw.writeStartElement("meuh");
    xtw.writeAttribute("active", "true");
      xtw.writeCharacters("The cows are flying high this Spring");
    xtw.writeEndElement();
  xtw.writeEndElement();

  xtw.writeStartElement("bar");
  xtw.writeAttribute("order", "2");
    xtw.writeStartElement("tcho");
    xtw.writeAttribute("kola", "K");
      xtw.writeCharacters("Content of tcho tag");
    xtw.writeEndElement();
  xtw.writeEndElement();

  xtw.writeEndElement();
  xtw.writeEndDocument();
}
catch (XMLStreamException e)
{
  e.printStackTrace();
}
catch (IOException ie)
{
  ie.printStackTrace();
}
finally
{
  if (xtw != null)
  {
    try
    {
      xtw.close();
    }
    catch (XMLStreamException e)
    {
      e.printStackTrace();
    }
  }
}