如何在Java中读取XML文件

Question

如何在Java中读取XML文件。

以下是我的XML文件：

<?xml version="1.0" encoding="utf-8"?>
<LivescoreData>
  <Sport SportId="1">
    <Name language="en">Soccer</Name>
    <Name language="se">Fotboll</Name>
    <Category CategoryId="34">
      <Name language="en">Australia</Name>
      <Name language="se">Australien</Name>
      <Tournament TournamentId="144">
        <Name language="en">Hyundai A-League</Name>
        <Name language="se">Hyundai A-League</Name>
        <Match MatchId="4616735">
          <MatchDate>2011-01-05T07:30:00</MatchDate>
          <Team1 TeamId="1029369">
            <Name language="en">Wellington Phoenix FC</Name>
            <Name language="se">Wellington</Name>
          </Team1>
          <Team2 TeamId="529088">
            <Name language="en">Melbourne Victory</Name>
            <Name language="se">Melbourne Victory</Name>
          </Team2>
          <Status Code="100">
            <Name language="en">Ended</Name>
            <Name language="se">Avslutad</Name>
          </Status>
          <Winner>1</Winner>
          <Scores>
            <Score type="Current">
              <Team1>2</Team1>
              <Team2>0</Team2>
            </Score>
          </Scores>
          <Goals></Goals>
          <Cards></Cards>
          <Substitutions></Substitutions>
          <Lineups></Lineups>
        </Match>
      </Tournament>
    </Category>
    <Category CategoryId="1">
      <Name language="en">England</Name>
      <Name language="se">England</Name>
      <Tournament TournamentId="1">
        <Name language="en">Premier League</Name>
        <Name language="se">Premier League</Name>
        <Match MatchId="4601857">
          <MatchDate>2011-01-04T21:00:00</MatchDate>
          <Team1 TeamId="5431228">
            <Name language="en">Blackpool FC</Name>
            <Name language="se">Blackpool FC</Name>
          </Team1>
          <Team2 TeamId="23960">
            <Name language="en">Birmingham City</Name>
            <Name language="se">Birmingham City</Name>
          </Team2>
          <Status Code="100">
            <Name language="en">Ended</Name>
            <Name language="se">Avslutad</Name>
          </Status>
          <Winner>1</Winner>
          <Scores>
            <Score type="Current">
              <Team1>5</Team1>
              <Team2>1</Team2>
            </Score>
          </Scores>
          <Goals></Goals>
          <Cards></Cards>
          <Substitutions></Substitutions>
          <Lineups></Lineups>
        </Match>
        <Match MatchId="4601859">
          <MatchDate>2011-01-04T21:00:00</MatchDate>
          <Team1 TeamId="26511">
            <Name language="en">Fulham FC</Name>
            <Name language="se">Fulham FC</Name>
          </Team1>
          <Team2 TeamId="94356">
            <Name language="en">West Bromwich Albion</Name>
            <Name language="se">West Bromwich Albion</Name>
          </Team2>
          <Status Code="100">
            <Name language="en">Ended</Name>
            <Name language="se">Avslutad</Name>
          </Status>
          <Winner>1</Winner>
          <Scores>
            <Score type="Current">
              <Team1>4</Team1>
              <Team2>1</Team2>
            </Score>
          </Scores>
          <Goals></Goals>
          <Cards></Cards>
          <Substitutions></Substitutions>
          <Lineups></Lineups>
        </Match>
      </Tournament>
    </Category>
  </Sport>
</LivescoreData>

下面是代码：IT打印XML Soccer的第一个值，而不能打印下一个。

nodeLst = doc.getElementsByTagName("Sport"); 
for (int i = 0; i < nodeLst.getLength(); i++) { 

    Node myNode = nodeLst.item(i); 

    if (myNode.getNodeType() == Node.ELEMENT_NODE) { 

       Element Sport = (Element) myNode; 
       NodeList Name= Sport 
        .getElementsByTagName("Name"); 
       Element NameElement = (Element) Name.item(0); 
       NodeList Namevalue = NameElement.getChildNodes(); 
       System.out.println("Name : " 
    + ((Node) Namevalue.item(0)).getNodeValue()+"|");  

    //This gives me null value  
       NodeList Category = Sport 
       .getElementsByTagName("Category"); 
       Element CategoryName= (Element) Category 
       .item(0); 
       NodeList Categoryvalue = CategoryName 
       .getChildNodes(); 
       System.out.println("Category: " 
       + ((Node) Categoryvalue.item(0)) 
       .getNodeValue()); 
   } 
}

只能读取第一个数据Soccer。第二个数据仅提供空值。

我需要我的结果为：

Soccer | Australia | Hyundai A-League | Wellington Phoenix FC - Melbourne Victory : 2 - 0
Soccer | England | Premier League | Blackpool FC - Birmingham City : 5 - 1
Soccer | England | Premier League | Fulham FC - West Bromwich Albion : 4 - 1

Answer 1

由于您还没有真正说过要使用的XML文件，因此，我能做的最好的就是将您引导到本指南：

http://tutorials.jenkov.com/java-xml/dom.html

Answer 2

您可以使用JAXP解析XML

Answer 3

最好不要在Java中执行此操作，而是在可以从Java应用程序调用的XSLT或XQuery代码中执行此操作更好/更容易。