在 Java 中引用本地 DTD
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Referring to a local DTD in Java
提问by Paul Reiners
I have some XML that I'm parsing with a SAX parser in Java. It starts with this preamble:
我有一些 XML 正在用 Java 中的 SAX 解析器进行解析。它从这个序言开始：
<!DOCTYPE math
PUBLIC "-//W3C//DTD MathML 3.0//EN"
"http://www.w3.org/Math/DTD/mathml3/mathml3.dtd">
How do I change this to use a local DTD?
如何更改它以使用本地 DTD？
I suppose I could do something like this:
我想我可以做这样的事情：
<!DOCTYPE math
PUBLIC "-//W3C//DTD MathML 3.0//EN"
"file:///c:/MathML/mathml3.dtd">
Not exactly like that, but somethinglike that. However, I need the path to be independent of the user's system.
不完全是这样，但事情那样。但是，我需要独立于用户系统的路径。
How do I use a local DTD with a path relative to the class path?
如何使用具有相对于类路径的路径的本地 DTD？
采纳答案by Jim Garrison
Take a look at this articleon using XML catalogs to resolve DTDs locally without having to modify your XML source. The basic steps are:
看看这篇关于使用 XML 目录在本地解析 DTD 而不必修改您的 XML 源的文章。基本步骤是：
- create an XML file that maps system IDs to local DTDs
- modify your code to instantiate and configure a CatalogResolver
- provide the CatalogResolver to the XML Reader (obtained from the parser)
- 创建一个将系统 ID 映射到本地 DTD 的 XML 文件
- 修改您的代码以实例化和配置 CatalogResolver
- 向 XML Reader 提供 CatalogResolver（从解析器获得）
回答by Hitham S. AlQadheeb
When dealing with Web Apps, you can put the dtd in the lib folder and refer to it like:
在处理 Web Apps 时，您可以将 dtd 放在 lib 文件夹中，并像这样引用它：
<!DOCTYPE name PUBLIC
"-//CMP//DTD dtdName 1.0//EN"
"/WEB-INF/lib/dtdName.dtd">
回答by alok
The solution is to provide the DTD file location in the system using classpath. So the DocType that worked offline would be:
解决方案是使用类路径在系统中提供 DTD 文件位置。所以离线工作的 DocType 将是：
<!DOCTYPE hibernate-configuration SYSTEM
"classpath://org/hibernate/hibernate-configuration-3.0.dtd">
回答by Puneet Akhouri
Also another way can be to keep the dtd at the localhost so that the final path becomes something like:
另一种方法是将 dtd 保留在本地主机上，以便最终路径变为：
<!DOCTYPE hibernate-configuration SYSTEM
"http://localhost/hibernate-configuration-3.0.dtd">
Definitely not the most elegant solution but surely does work.
绝对不是最优雅的解决方案，但肯定有效。
