使用XPathJava读取标记内部

Hye我不熟悉使用Java读取XML文件。我的问题是，我一直在尝试读取XML，在一个特定的标记之间，我想获取所需的数据。我正在使用XPath，我的查询是：

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

它工作正常，我要读取的特定标签是：

   <ATTRIBUTE name="Description" type="STRING"> SOME TEXT </ATTRIBUTE>

在标签里面！ 有人能帮我怎么做吗？我对xml阅读还不熟悉！尽我所能：

  String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE[@name='Description' and ./type/text()='STRING']";

但它不会给我任何输出！ 提前谢谢

我的代码：

   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);
}       

DocumentBuilderFactory builderFactory=
DocumentBuilderFactory.newInstance（）；
DocumentBuilder=null；
试一试{
builder=builderFactory.newDocumentBuilder（）；
org.w3c.dom.Document Document=builder.parse(
新文件输入流（“c:\\y.xml”）；
XPath=XPathFactory.newInstance（）.newXPath（）；
字符串表达式=“/ADOXML/MODELS/MODEL/modeldattributes/ATTRIBUTE[@name='Description'和@type='String']”；
System.out.println（表达式）；
NodeList NodeList=（NodeList）xPath.compile（expression.evaluate（document，XPathConstants.NODESET）；
for（int i=0；i

---

我的代码有问题，我搞不懂是什么

这段代码对我来说很好，XPath更改为：

“/ADOXML/MODELS/MODEL/modeldattributes/ATTRIBUTE[@name='Description'][@type='STRING']”

：

---

上面提到的代码运行良好

您也可以尝试其他方法来获取文本节点-

String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE/text()";

NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);

System.out.println(nodeList.item(0).getNodeValue());

---

lols你怎么能说，即使你是在阅读了问题后发布的，我也必须阅读一个xml文件，然后才想获取标签库中的数据，但我不理解你的评论。我没有您使用的XML，所以我使用了内存中的示例和您的代码。有了这个例子，一切都正常了。因此，关于您在其中读取的XML文档，您的XPath可能不正确。如果您也喜欢发布XML文档。如果我遗漏了什么，很抱歉。我正在提供XML、XML或XSD或您希望匹配XPath的XML片段。我已经发布了我的XML部分不知道您的意思

private static final String EXAMPLE_XML =
        "<?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=\"Description\" type=\"STRING\">I WANT THIS PARA 2</ATTRIBUTE>" +
                    "</MODELATTRIBUTES>" +
                "</MODEL>" +
            "</MODELS>" +
        "</ADOXML>";

public static void main(String[] args) {
    DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = null;
    try {
        builder = builderFactory.newDocumentBuilder();
        Document document = builder.parse(new ByteArrayInputStream(EXAMPLE_XML.getBytes()));
        XPath xPath =  XPathFactory.newInstance().newXPath();
        String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE[@name='Description'][@type='STRING']";
        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 (Exception e) {
        System.out.print(e);
    }
}

###I WANT THIS PARA 2###

String expression = "/ADOXML/MODELS/MODEL/MODELATTRIBUTES/ATTRIBUTE/text()";

NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);

System.out.println(nodeList.item(0).getNodeValue());