在XML文件中搜索元素值 [英] Search for element value in an XML file
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问题描述
在给定的XML文件中，我试图在Java中使用 XPath 搜索字符串的存在。然而，即使字符串在那里，我的输出总是会出现一个号码。希望有人可以指出我可能做错了什么？
In a given XML file, I'm trying to search for the presence of a string using XPath in Java. However, even though the string is there, my output is always coming up as a No. Hoping someone here can point out what I may be doing wrong?
XML文件：
<article>
<body>
<section>
<h1>intro1</h1>
<region>introd1</region>
<region>introd2</region>
</section>
<section>
<h1 class="pass">1 task objectives</h1>
<region>object1</region>
<region>object2</region>
</section>
<section>
<h1 class="pass">1 task objectives</h1>
<region>object1</region>
<region>This is the Perfect Word I am looking for</region>
</section>
</body>
</article>
在Java中，我正在尝试检查单词的存在完美喜欢这样：
Within Java, I'm trying to check for the presence of the word "perfect" like this:
expr = xpath.compile("//article//body//section//region[contains(.,'perfect')]");
object result = expr.evaluate(doc,XPathConstants.NODESET);
NodeList nodes = (NodeList)result;
if (nodes.getLength() > 0) {
System.out.println("Found");
// do other stuff here
} else {
System.out.println("Not found");
}
运行时，输出始终为找不到。知道我做错了吗？
When I run this, the output is always "Not Found". Any idea what I am doing wrong?
推荐答案
我测试了这个......
I tested this...
expr =xpath.compile("/article/body/section/region[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect')]");
反对
<article>
<body>
<section>
<h1>intro1</h1>
<region>perfect</region>
<region>Perfect</region>
</section>
<section>
<h1 class="pass">1 task objectives</h1>
<region>pErFeCt</region>
<region>Not Perfect</region>
</section>
<section>
<h1 class="pass">1 task objectives</h1>
<region>object1</region>
<region>This is the Perfect Word I am looking for</region>
</section>
</body>
</article>
使用...
import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class TestXML05 {
public static void main(String[] args) {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
Document doc = factory.newDocumentBuilder().parse(new File("Sample.xml"));
XPathFactory xFactory = XPathFactory.newInstance();
XPath xPath = xFactory.newXPath();
XPathExpression exp = xPath.compile("/article/body/section/region[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect')]");
NodeList nl = (NodeList)exp.evaluate(doc.getFirstChild(), XPathConstants.NODESET);
for (int index = 0; index < nl.getLength(); index++) {
Node node = nl.item(index);
System.out.println(node.getTextContent());
}
} catch (Exception ex) {
Logger.getLogger(TestXML05.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
输出哪个...
perfect
Perfect
pErFeCt
Not Perfect
This is the Perfect Word I am looking for
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