問題描述

<?xml version="1.0" encoding="UTF-8"?>
-<ADOXML adoversion="Version 5.1" username="kvarga" database="adonisdb" time="08:55"   date="30.11.2013" version="3.1">
-<MODELS>
-<MODEL version="" applib="ADONIS BPMS BP Library 5.1" libtype="bp" modeltype="Business process model" name="Product development" id="mod.25602">
 -<MODELATTRIBUTES>
<ATTRIBUTE name="Version number" type="STRING"> </ATTRIBUTE>
<ATTRIBUTE name="Author" type="STRING">kvarga</ATTRIBUTE>
<ATTRIBUTE name="Creation date" type="STRING">2013-11-30, 08:50</ATTRIBUTE>
<ATTRIBUTE name="Date last changed" type="STRING">2013-11-30, 08:54:46</ATTRIBUTE>

-<INSTANCE name="Business Opportunities census" id="obj.25615" class="Activity">
<ATTRIBUTE name="Position" type="STRING">NODE x:6.5cm y:10.5cm index:7</ATTRIBUTE>

<ATTRIBUTE name="External tool coupling" type="STRING"> </ATTRIBUTE>
<ATTRIBUTE name="Description" type="STRING">I WANT THIS PARA 1</ATTRIBUTE>


<ATTRIBUTE name="Version number" type="STRING"> </ATTRIBUTE>
<ATTRIBUTE name="Author" type="STRING">kvarga</ATTRIBUTE>
<ATTRIBUTE name="Creation date" type="STRING">2013-11-30, 08:50</ATTRIBUTE>
<ATTRIBUTE name="Date last changed" type="STRING">2013-11-30, 08:54:46</ATTRIBUTE>

-<INSTANCE name="Business Opportunities census" id="obj.25615" class="Activity">
<ATTRIBUTE name="Position" type="STRING">NODE x:6.5cm y:10.5cm index:7</ATTRIBUTE>
<ATTRIBUTE name="Description" type="STRING">I WANT THIS PARA 2</ATTRIBUTE>
</INSTANCE>


 </MODEL>

 </MODELS>

 </ADOXML>

Hye 我想讀取這個 xml 文件，并且需要獲取標簽內的文本:

Hye There I want to read this xml file and need to get the text inside the tag given as:

 <ATTRIBUTE name="Description" type="STRING">

我一直在嘗試使用我的代碼獲得結果:

I have been Trying to get the results using my code as:

 DocumentBuilderFactory builderFactory =
    DocumentBuilderFactory.newInstance();
  DocumentBuilder builder = null;
try {

builder = builderFactory.newDocumentBuilder();
        org.w3c.dom.Document document = builder.parse(
        new FileInputStream("c:\y.xml"));

        XPath xPath =  XPathFactory.newInstance().newXPath();

       String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE[@name='Description'and @type='STRING']";
   System.out.println(expression);
   NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); i++) {
System.out.println(nodeList.item(i).getFirstChild().getNodeValue()); 
}


} catch (ParserConfigurationException | SAXException | IOException e) {
System.out.print(e);
}       

我的代碼有問題，無法弄清楚是什么！

There is a problem with my code cant figure out what!

如果我使用 XPath 表達式，我的代碼可以正常工作:

My code works fine if i use XPath expression as:

String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE[@type='STRING']";

它工作正常，但我要讀取的特定標簽是:

It works fine but my specific Tag to read from is:

   <ATTRIBUTE name="Description" type="STRING"> I WANT THIS PARA 1 </ATTRIBUTE>

所以輸出應該是:

   I WANT THIS PARA 1
   I WANT THIS PARA 2

提前致謝

推薦答案

為你的 XPath 試試這個表達式.

Try this expression for your XPath.

String expression = "http://ADOXML//MODELS//MODEL//MODELATTRIBUTES//ATTRIBUTE[@name='Description' and @type='STRING'] | //ADOXML//MODELS//MODEL//MODELATTRIBUTES//INSTANCE/ATTRIBUTE[@name='Description' and @type='STRING']";

它同時顯示名稱 = 'Description' 的 Attributes 標簽 1) 在 MODELATTRIBUTES 標簽下直接訪問和 2) 在 INSTANCE 標簽下

It is displaying both Attributes tag with name = 'Description' 1) directly accessed under MODELATTRIBUTES tag and 2) under the INSTANCE tag

這篇關于使用具有多個條件 Java 的 XPath 讀取特定標簽內部的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！