java 使用 XPath 查询搜索字符串的一部分
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Searching part of a String using XPath query
提问by JavaBits
I am using the following XPath query to search the name of the author of a book and return the book name when it matches the author.
我正在使用以下 XPath 查询来搜索一本书的作者姓名，并在与作者匹配时返回书名。
String rawXPath = String.format("//book[author= '%s']/bookname/text()", authorBook);
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
XPathExpression expr
= xpath.compile(rawXPath);
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
System.out.println(nodes.item(i).getNodeValue());
}
how to modify the search so that I can search in the content ...../content(node name) for a specific word.
如何修改搜索，以便我可以在内容 ...../content(node name) 中搜索特定单词。
Example: String inside the xml content variable: "This book contains the glory and history of our forefathers. And the impact of it in our daily life is immense."
示例：xml 内容变量中的字符串：“这本书包含了我们祖先的荣耀和历史。它在我们日常生活中的影响是巨大的。”
Now I want to search for the word "daily". If it matches daily it will retun me the book name/author name watever the user wants.
现在我想搜索“daily”这个词。如果它每天匹配，它会返回用户想要的书名/作者姓名。
Thanks
谢谢
采纳答案by forty-two
Use the contains()Xpath function.
使用contains()Xpath 函数。
//book[contains(content, '%s')]/bookname
depending a bit of the structure of you input XML
取决于您输入 XML 的一些结构
回答by Dimitre Novatchev
You want:
你想要：
//book[contains(content, $searchString)
and
author = $wantedAuthor
]
/bookname/text()
This selects the text()nodes that are children of the booknameelement that is a child of any bookelement in the document, the string value of whose contentchild contains the string (contained in) $searchStringand the string value of whose authorelement is the same as the (string contained in) $wantedAuthorvariable
这将选择作为文档中任何元素的子元素的元素的子text()节点的节点，bookname其子book元素的字符串值content包含字符串（包含在），$searchString并且其author元素的字符串值与（包含在)$wantedAuthor变量
In this Xpath expression the variables need to be substituted by specific strings. Also, it assumes that the element contentis a child of book.
在这个 Xpath 表达式中，变量需要被特定的字符串替换。此外，它假定该元素content是 的子元素book。
I don't know Java, but suppose that the final Java code wil look like the following:
我不懂 Java，但假设最终的 Java 代码如下所示：
String.format("//book[contains(content, '%s')
and
author= '%s']/bookname/text()",
searchString, authorBook);
回答by JavaBits
Now if u want to search also some term which is inside one node u can do it like this -
现在，如果您还想搜索某个节点内的某个术语，您可以这样做 -
String rawXPath = String.format("//book/title[contains(innerItem, '%s')]/type/text()", value);
Add one backslash for each node and the node name and ur in.
为每个节点添加一个反斜杠以及节点名称和 ur in。
回答by Lucas de Oliveira
if your xml looks like this:
如果您的 xml 如下所示：
<book>
<author> Author Name </author>
<description> This book contains the glory and history of our forefathers. And the impact of it in our daily life is immense.</description>
</book>
then you can try:
那么你可以尝试：
String rawXPath = "//book//*[contains(text(),\"daily\")]";
which means "give any book element that any child holds a text that contains the word 'daily'.
这意味着“给任何孩子持有包含“每日”一词的文本的任何书籍元素。
I hope that helps you out! cheers!
我希望能帮到你！干杯！
