在Java中使用XPath解析XML

我想解析此XML文件：

 <NameDefinitions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="../Documents/Calcs/FriendlyNames.xsd">


     <NameDefinition>
         <ID>/Temporary/EIC/EICWorksheetPP/WagesLessThanAdjustments</ID>
         <Name>you have more income that doesn't count than income that counts</Name>
         <BooleanPhrases>
             <True><Text>you have more income that doesn't count than income that counts</Text></True>
             <False><Text>you have more income that counts than income that doesn't count</Text></False>
             <Blank><Text>we don't if you have more income that doesn't count than income that counts</Text></Blank>
         </BooleanPhrases>
         <BooleanQuestions>
             <True><Text>Why do I have more income that doesn't count than income that counts?</Text></True>
             <False><Text>Why do I have more income that counts than income that doesn't count?</Text></False>
             <Blank><Text>Why don't you know if I have more income that doesn't count than income that counts?</Text></Blank>
         </BooleanQuestions>
     </NameDefinition>


     <NameDefinition>
         <ID>/Temporary/EIC/HaveInaccurateInfo</ID>
         <Name>you told us your info is incorrect</Name>
         <BooleanPhrases>
             <True><Text>you told us some of your info is incorrect</Text></True>
             <False><Text>you told us your info is correct</Text></False>
             <Blank><Text>we don't know whether your info is correct</Text></Blank>
         </BooleanPhrases>
         <BooleanQuestions>
             <True><Text>Why is some of my info incorrect?</Text></True>
             <False><Text>Why is my info correct?</Text></False>
             <Blank><Text>Why don't you know if my info is correct?</Text></Blank>
         </BooleanQuestions>
     </NameDefinition>

</NameDefinitions>

例外情况：

java.io.IOException: Stream closed
    at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:162)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:206)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)

javax.xml.xpath.XPathExpressionException: java.io.IOException: Stream closed
    at org.apache.xpath.jaxp.XPathImpl.evaluate(XPathImpl.java:481)

Caused by: java.io.IOException: Stream closed
    at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:162)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:206)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)

---

我已经关闭了溪流，但显然还是个问题

//将xml-api.jar用于下面的类，如DocumentBuilderFactory

//XPATH expressions
public static final String IdExpr = "/NameDefinition/@Id";
public static final String NameExpr = "/NameDefinition/@Name";

Map<String,String> evaluateXML(String file, String IdExpr, String NameExpr) {
    Map < String,
    String > returnMap = null;
    try {
        FileInputStream fis = new FileInputStream(new File(file));

        DocumentBuilderFactory builderFactory = DocumentBuilderFactory
            .newInstance();
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        Document xmlDocument = builder.parse(fis);

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

        String Id = xPath.compile(IdExpr).evaluate(
                xmlDocument);
        String Name = xPath.compile(NameExpr).evaluate(
                xmlDocument);

        returnMap = new HashMap < String,
        String > ();

        returnMap.put(Id, Name);
    }

//XPATH表达式
公共静态最终字符串IdExpr=“/namefinition/@Id”；
公共静态最终字符串NameExpr=“/NameDefinition/@Name”；
映射evaluateXML（字符串文件、字符串IdExpr、字符串名称EXPR）{
MapreturnMap=null；
试一试{
FileInputStream fis=新FileInputStream（新文件（文件））；
DocumentBuilderFactory builderFactory=DocumentBuilderFactory
.newInstance（）；
DocumentBuilder=builderFactory.newDocumentBuilder（）；
文档xmlDocument=builder.parse（fis）；
XPath=XPathFactory.newInstance（）.newXPath（）；
String Id=xPath.compile（IdExpr.evaluate）(
xml文档）；
String Name=xPath.compile（NameExpr.evaluate）(
xml文档）；
returnMap=newhashmap（）；
returnMap.put（Id，Name）；
}

解决方案已经提出，在发布此问题之前，我应该做一些研究：

static Map<String,String> parseDoc(String pathToFriendlyNamesFile) 
        throws ParserConfigurationException, 
        SAXException, 
        IOException {

    File f = new File(pathToFriendlyNamesFile); 
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(f);

    Map<String,String> map = new LinkedHashMap<String, String>();

    doc.getDocumentElement().normalize();

    System.out.println("Root Element: "+doc.getDocumentElement().getNodeName());

    NodeList nList = doc.getElementsByTagName("NameDefinition");
    System.out.println("How many nodes? "+nList.getLength());
    for(int i=0;i<nList.getLength();i++) {
        Node nNode = nList.item(i);

        if(nNode.getNodeType() == Node.ELEMENT_NODE) {
            Element eElement = (Element) nNode;
            String nodeID = eElement.getElementsByTagName("ID").item(0).getTextContent();
            String name = eElement.getElementsByTagName("Name").item(0).getTextContent();

            System.out.println("ID: "+nodeID+" Name: "+name);
            map.put(nodeID, name);
        }
    }

    return map;
}

静态映射parseDoc（字符串pathToFriendlyNamesFile）
抛出ParserConfiguration异常，
除此之外，
IOException{
文件f=新文件（pathToFriendlyNamesFile）；
DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance（）；
DocumentBuilder db=dbf.newDocumentBuilder（）；
文档doc=db.parse（f）；
Map Map=newlinkedhashmap（）；
doc.getDocumentElement（）.normalize（）；
System.out.println（“根元素：+doc.getDocumentElement（）.getNodeName（））；
NodeList nList=doc.getElementsByTagName（“名称定义”）；
System.out.println（“有多少个节点？”+nList.getLength（））；
对于（int i=0；iIs）您必须使用x-path？如果不是，那么您可以使用DOM对象进行解析。这可能会对您有所帮助。我想使用Xpath，这不是必需的使用上述方法…这将非常简单。很简单，但由于某些原因，此实现无法工作
static Map<String,String> parseDoc(String pathToFriendlyNamesFile) 
        throws ParserConfigurationException, 
        SAXException, 
        IOException {

    File f = new File(pathToFriendlyNamesFile); 
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(f);

    Map<String,String> map = new LinkedHashMap<String, String>();

    doc.getDocumentElement().normalize();

    System.out.println("Root Element: "+doc.getDocumentElement().getNodeName());

    NodeList nList = doc.getElementsByTagName("NameDefinition");
    System.out.println("How many nodes? "+nList.getLength());
    for(int i=0;i<nList.getLength();i++) {
        Node nNode = nList.item(i);

        if(nNode.getNodeType() == Node.ELEMENT_NODE) {
            Element eElement = (Element) nNode;
            String nodeID = eElement.getElementsByTagName("ID").item(0).getTextContent();
            String name = eElement.getElementsByTagName("Name").item(0).getTextContent();

            System.out.println("ID: "+nodeID+" Name: "+name);
            map.put(nodeID, name);
        }
    }

    return map;
}