XML::LibXML 行结束（空格）问题
你好， 我正在 Perl 中使用 LibXML 解析 XML 文件。 我遇到的问题是结束字符（空格）被视为文本节点。例如，给定如下输入 解析器
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE books [
<!ELEMENT title (#PCDATA)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT year (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ELEMENT book (title, author, year, price)>
<!ELEMENT books (book*)>
]>
<books>
<book>
<title>Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
</books>
认为节点“books”的子节点数为 3，它们是：
- 文本节点（包含
之间的字符） - 文本节点的元素节点（包含
和之间的字符;)
问题是如何告诉 LibXML 忽略空格？ 我尝试使用 no_blanks （即构建解析器时 $parser = XML::LibXML->new(no_blanks => 1) ），但似乎没有效果。
提前致谢
HI,
I am parsing an XML file using LibXML in Perl.
The problem that I have is the ending characters (whitespace) is treated as a text node. For instance, given an input like the following
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE books [
<!ELEMENT title (#PCDATA)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT year (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ELEMENT book (title, author, year, price)>
<!ELEMENT books (book*)>
]>
<books>
<book>
<title>Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
</books>
The parser thinks that the number of child of node "books" is 3, they are:
- text node (containing the char between
<books>and<book>) - element node of
<book> - text node (containing the char between
</book>and</books>)
Question is how do I tell LibXML to ignore whitespaces?
I tried with no_blanks (that is $parser = XML::LibXML->new(no_blanks => 1) when construction the parser) but it seems that it has no effect.
Thanks in advance
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XML::LibXML::Parser 有
$parser->keep_blanks(0);。它应该做与 no_blanks 相反的事情 - 看看是否有效XML::LibXML::Parser has
$parser->keep_blanks(0);. It's supposed to do the opposite of no_blanks - see if that works严格来说，
XML::LibXML正在做正确的事情...假设您已解析内容并将结果分配给
$document，那么您现在就有了XML::LibXML::Document类的实例。使用此方法，您可以使用documentElement()获取这会返回
XML::LibXML::Element的实例>。由此，您可以使用getChildrenByTagName()获取这有帮助吗？
Strictly-speaking,
XML::LibXMLis doing the correct thing... there are three child-nodes of the<books>element. The question is, how are you parsing the content, and why is this a problem?Assuming you've parsed your content and assigned the result to
$document, you now have an instance of theXML::LibXML::Documentclass. Using this, you can get the<books>element by usingdocumentElement():This returns an instance of
XML::LibXML::Element. From this, you can get just the<book>child-elements usinggetChildrenByTagName():Does this help?