如何使用Jackson XmlMapper控制编码? [英] How to control encoding with Jackson XmlMapper?

问题描述

我找不到将序列化XML的编码从默认的UTF-8更改为ISO-8859-1的(很明显的)方法.我阅读了使用指南，这使我认为必须有一种方法将XMLOutputFactory与XmlFactory结合使用可实现此目的，但是我看不到一种方法来配置这些工厂中的任何一个以默认使用另一种编码，只有createXMLEventWriter可以在其中传递编码.

I can't find a(n obvious) way to change the encoding for serialized XML from the default UTF-8 to ISO-8859-1. I read the Usage Guide, which makes me think that there must be a way using XMLOutputFactory with XmlFactory to achieve this, but I can't see a way to configure any of those factories to use another encoding by default, there's only createXMLEventWriter where I could pass in an encoding.

我知道如何使用ToXmlGenerator.Feature.WRITE_XML_DECLARATION生成XML声明.所以我需要的是这样的声明:

I know how to generate the XML declaration using ToXmlGenerator.Feature.WRITE_XML_DECLARATION. So what I need is a declaration like this:

<?xml version='1.0' encoding='ISO-8859-1'?>

当然，内容也应该用ISO-8859-1编码.

And of course the content should be encoded in ISO-8859-1, too.

推荐答案

在

In the ToXmlGenerator source code, you'll find that UTF-8 is hard coded:

if (Feature.WRITE_XML_1_1.enabledIn(_formatFeatures)) {
    _xmlWriter.writeStartDocument("UTF-8", "1.1");
} else if (Feature.WRITE_XML_DECLARATION.enabledIn(_formatFeatures)) {
    _xmlWriter.writeStartDocument("UTF-8", "1.0");
} else {
    return;
}

一旦问题 ://github.com/FasterXML/jackson-dataformat-xml"rel =" nofollow noreferrer> jackson-dataformat-xml 项目.

Once ToXmlGenerator is final there might not be an easy way to handle it. I've submitted an issue in the jackson-dataformat-xml project.

如果坚持使用JAXB，则可以使用

If you stick to JAXB, you can control the value of the encoding attribute using Marshaller.JAXB_ENCODING:

Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_ENCODING, "ISO-8859-1");
marshaller.marshal(foo, System.out);

查看此答案.

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