是否有Java XML API可以在不解析字符实体的情况下解析文档？ [英] Is there a Java XML API that can parse a document without resolving character entities?

问题描述

我的程序需要解析包含字符实体的XML。程序本身不需要解决它们，它们的列表很大并且会发生变化，所以如果可以的话，我想避免明确支持这些实体。

I have program that needs to parse XML that contains character entities. The program itself doesn't need to have them resolved, and the list of them is large and will change, so I want to avoid explicit support for these entities if I can.

这是一个简单的例子：

<?xml version="1.0" encoding="UTF-8"?>
<xml>Hello there &something;</xml>

是否存在可以在不解析（非标准）字符实体的情况下成功解析文档的Java XML API ？理想情况下，它会将它们转换为可以特殊处理的特殊事件或对象，但我会选择一种可以默默抑制它们的选项。

Is there a Java XML API that can parse a document successfully without resolving (non-standard) character entities? Ideally it would translate them into a special event or object that could be handled specially, but I'd settle for an option that would silently suppress them.

回答&安培;示例：

Skaffman给了我答案：使用带有 IS_REPLACING_ENTITY_REFERENCES 设置为false的StAX解析器。

Skaffman gave me the answer: use a StAX parser with IS_REPLACING_ENTITY_REFERENCES set to false.

以下是我试用的代码：

XMLInputFactory inputFactory = XMLInputFactory.newInstance();
inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, false);
XMLEventReader reader = inputFactory.createXMLEventReader(
    new FileInputStream("your file here"));

while (reader.hasNext()) {
    XMLEvent event = reader.nextEvent();
    if (event.isEntityReference()) {
        EntityReference ref = (EntityReference) event;
        System.out.println("Entity Reference: " + ref.getName());
    }
}

对于上述XML，它将打印实体参考：某事。

For the above XML, it will print "Entity Reference: something".

推荐答案

STaX API支持这一概念不通过 IS_REPLACING_ENTITY_REFERENCES 属性：

The STaX API has support for the notion of not replacing character entity references, by way of the IS_REPLACING_ENTITY_REFERENCES property:

要求解析器用
替换替换
内部实体引用文本并将其报告为
字符

Requires the parser to replace internal entity references with their replacement text and report them as characters

这可以设置为 XmlInputFactory ，然后用于构造 XmlEventReader 或 XmlStreamReader 。但是，API谨慎地说，此属性仅用于强制实现执行替换，而不是强制它而不是替换它们。不过，它还值得一试。

This can be set into an XmlInputFactory, which is then in turn used to construct an XmlEventReader or XmlStreamReader. However, the API is careful to say that this property is only intended to force the implementation to perform the replacement, rather than forcing it to not replace them. Still, it's got to be worth a try.

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