如何在java中读取xml文件

zpf6vheq  于 2023-11-15  发布在  Java
关注(0)|答案(4)|浏览(132)

如何在Java中读取XML文件
下面是我的XML文件：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LivescoreData>
  3.   <Sport SportId="1">
  4.     <Name language="en">Soccer</Name>
  5.     <Name language="se">Fotboll</Name>
  6.     <Category CategoryId="34">
  7.       <Name language="en">Australia</Name>
  8.       <Name language="se">Australien</Name>
  9.       <Tournament TournamentId="144">
  10.         <Name language="en">Hyundai A-League</Name>
  11.         <Name language="se">Hyundai A-League</Name>
  12.         <Match MatchId="4616735">
  13.           <MatchDate>2011-01-05T07:30:00</MatchDate>
  14.           <Team1 TeamId="1029369">
  15.             <Name language="en">Wellington Phoenix FC</Name>
  16.             <Name language="se">Wellington</Name>
  17.           </Team1>
  18.           <Team2 TeamId="529088">
  19.             <Name language="en">Melbourne Victory</Name>
  20.             <Name language="se">Melbourne Victory</Name>
  21.           </Team2>
  22.           <Status Code="100">
  23.             <Name language="en">Ended</Name>
  24.             <Name language="se">Avslutad</Name>
  25.           </Status>
  26.           <Winner>1</Winner>
  27.           <Scores>
  28.             <Score type="Current">
  29.               <Team1>2</Team1>
  30.               <Team2>0</Team2>
  31.             </Score>
  32.           </Scores>
  33.           <Goals></Goals>
  34.           <Cards></Cards>
  35.           <Substitutions></Substitutions>
  36.           <Lineups></Lineups>
  37.         </Match>
  38.       </Tournament>
  39.     </Category>
  40.     <Category CategoryId="1">
  41.       <Name language="en">England</Name>
  42.       <Name language="se">England</Name>
  43.       <Tournament TournamentId="1">
  44.         <Name language="en">Premier League</Name>
  45.         <Name language="se">Premier League</Name>
  46.         <Match MatchId="4601857">
  47.           <MatchDate>2011-01-04T21:00:00</MatchDate>
  48.           <Team1 TeamId="5431228">
  49.             <Name language="en">Blackpool FC</Name>
  50.             <Name language="se">Blackpool FC</Name>
  51.           </Team1>
  52.           <Team2 TeamId="23960">
  53.             <Name language="en">Birmingham City</Name>
  54.             <Name language="se">Birmingham City</Name>
  55.           </Team2>
  56.           <Status Code="100">
  57.             <Name language="en">Ended</Name>
  58.             <Name language="se">Avslutad</Name>
  59.           </Status>
  60.           <Winner>1</Winner>
  61.           <Scores>
  62.             <Score type="Current">
  63.               <Team1>5</Team1>
  64.               <Team2>1</Team2>
  65.             </Score>
  66.           </Scores>
  67.           <Goals></Goals>
  68.           <Cards></Cards>
  69.           <Substitutions></Substitutions>
  70.           <Lineups></Lineups>
  71.         </Match>
  72.         <Match MatchId="4601859">
  73.           <MatchDate>2011-01-04T21:00:00</MatchDate>
  74.           <Team1 TeamId="26511">
  75.             <Name language="en">Fulham FC</Name>
  76.             <Name language="se">Fulham FC</Name>
  77.           </Team1>
  78.           <Team2 TeamId="94356">
  79.             <Name language="en">West Bromwich Albion</Name>
  80.             <Name language="se">West Bromwich Albion</Name>
  81.           </Team2>
  82.           <Status Code="100">
  83.             <Name language="en">Ended</Name>
  84.             <Name language="se">Avslutad</Name>
  85.           </Status>
  86.           <Winner>1</Winner>
  87.           <Scores>
  88.             <Score type="Current">
  89.               <Team1>4</Team1>
  90.               <Team2>1</Team2>
  91.             </Score>
  92.           </Scores>
  93.           <Goals></Goals>
  94.           <Cards></Cards>
  95.           <Substitutions></Substitutions>
  96.           <Lineups></Lineups>
  97.         </Match>
  98.       </Tournament>
  99.     </Category>
  100.   </Sport>
  101. </LivescoreData>

字符串
下面是代码：它打印XML足球的第一个值，但无法打印下一个值。

  1. nodeLst = doc.getElementsByTagName("Sport"); 
  2. for (int i = 0; i < nodeLst.getLength(); i++) { 
  4.     Node myNode = nodeLst.item(i); 
  6.     if (myNode.getNodeType() == Node.ELEMENT_NODE) { 
  8.        Element Sport = (Element) myNode; 
  9.        NodeList Name= Sport 
  10.         .getElementsByTagName("Name"); 
  11.        Element NameElement = (Element) Name.item(0); 
  12.        NodeList Namevalue = NameElement.getChildNodes(); 
  13.        System.out.println("Name : " 
  14.     + ((Node) Namevalue.item(0)).getNodeValue()+"|");  
  16.     //This gives me null value  
  17.        NodeList Category = Sport 
  18.        .getElementsByTagName("Category"); 
  19.        Element CategoryName= (Element) Category 
  20.        .item(0); 
  21.        NodeList Categoryvalue = CategoryName 
  22.        .getChildNodes(); 
  23.        System.out.println("Category: " 
  24.        + ((Node) Categoryvalue.item(0)) 
  25.        .getNodeValue()); 
  26.    } 
  27. }

型
我只能读取第一个数据足球。第二个只是给予空值。
我需要的结果是：

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

型

Java

4条答案

按热度按时间
gcxthw6b

gcxthw6b1#

可以使用JAXP解析XML

赞(0）分享  回复(0）举报  2023-11-15
nkcskrwz

nkcskrwz2#

由于您还没有真正说出您想对所述XML文件做什么，因此我所能做的就是将您引导到本指南：
http://tutorials.jenkov.com/java-xml/dom.html

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cuxqih21

cuxqih213#

最好/最好不要在Java中这样做，而是在可从Java应用程序调用的XML或XQuery代码中这样做。

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iyfjxgzm

iyfjxgzm4#

搜索关键字：644264426442代码包括如何在java中写入和读取.xml
保存：

  1. List<Node> list = tree.levelTraversal();
  2. File file = new File("people.xml");
  3. DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
  4. try {
  5.     DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
  6.     Document document = documentBuilder.newDocument();
  7.     Element root= document.createElement("people");
  8.     document.appendChild(root);
  9.     for(Node n:list){
  10.        Person p = (Person) n.getData();
  11.        Element person = document.createElement("person");
  12.        root.appendChild(person);
  13.        Element id = document.createElement("id");
  14.        id.appendChild(document.createTextNode(p.getId().toString()));
  15.        person.appendChild(id);
  16.        Element name = document.createElement("name");
  17.        name.appendChild(document.createTextNode(p.getName()));
  18.        person.appendChild(name);
  19.        Element age = document.createElement("age");
  20.        age.appendChild(document.createTextNode(p.getAge().toString()));
  21.        person.appendChild(age);    
  22.        Element occupation = document.createElement("occupation");
  23.        occupation.appendChild(document.createTextNode(p.getOccupation()));
  24.        person.appendChild(occupation);
  25.     }
  26.     Transformer transformer = TransformerFactory.newDefaultInstance().newTransformer();
  27.     transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
  28.     transformer.setOutputProperty(OutputKeys.INDENT, "yes");
  29.     DOMSource domSource=new DOMSource(document);
  30.     StreamResult result = new StreamResult(file);
  31.     transformer.transform(domSource,result);
  32. }
  33. //==========================================
  34. Element root = doc.createElement(STATE_ROOT_ELEMENT);
  35. doc.appendChild(root);
  36. for(int i=0;i< keys.size();i++){
  37.     Element key = doc.createElement(keys.get(i));
  38.     key.setTextContent(states.get(i));
  39.     root.appendChild(key);
  40.     }

字符串
负载：

  1. File f = new File(FileUtil.getTableFileName(tableName));
  2. DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
  3. Document document = db.parse(f);
  4. NodeList customersList = document.getElementsByTagName(Customer.KEY_ELEMENT);
  5. for(int i =0; i<customersList.getLength();i++){
  6. Customer customer = new Customer();
  7. Element element = (Element) customersList.item(i);
  8. Integer id = null;
  9. if(element.getElementsByTagName(Customer.KEY_ID).getLength()!=0)
  10.     id = Integer.valueOf(element.getElementsByTagName(Customer.KEY_ID).item(0).getFirstChild().getNodeValue());
  11. if(element.getElementsByTagName(Customer.KEY_NAME).getLength()!=0)
  12.     name = element.getElementsByTagName(Customer.KEY_NAME).item(0).getFirstChild().getNodeValue();
  13. }
  14. //=====================
  15. NodeList list = doc.getFirstChild().getChildNodes();
  16. for(int i =0;i<list.getLength();i++){
  17.     if(list.item(i).getNodeType()==1) {
  18.         String s1 = list.item(i).getNodeName();
  19.         key.add(s1);
  20.         String s2 = list.item(i).getTextContent();
  21.         states.add(s2);
  22.     }
  23. }
  24. returnList.add(key);
  25. returnList.add(states);
  26. return returnList;

型
测试

  1. @Test(expected = NullCharacterException.class, timeout = 1000)
  2. public void testNullCharacterException() {
  3.     State state = StandState.getInstance();
  4.     state.check(null,Key.RESET);
  5. }
  6. //=========================================================
  7. @Test
  8. public void test2(){
  9.     Person person = new Person("jake",30,"1",false,false);
  10.     person.setId(1);
  11.     Exception exception = assertThrows(RuntimeException.class, ()->{
  12.         personRepository.save(person);
  13.     });;
  14.     assertEquals("Person instance must have null id",exception.getMessage());
  15. }

型

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