Java解析XMl文件之SAX和DOm方法

如题，这两种方法的jar包都在jdk中，不需要下载。

先来说下目录结构：

首先建一个Peron类封装person.xml的属性；DomParseService和SaxParseService分别为两种解析方法的服务类。最后TestXml为测试类。

Person.xml如下：

 1 <?xml version="1.0" encoding="gbk"?>
 2 <Persons>
 3     <Person id="1">
 4         <name>zhangsan</name>
 5         <sex>男</sex>
 6         <age>30</age>
 7     </Person>
 8     <Person id="2">
 9         <name>lisi</name>
10         <sex>女</sex>
11         <age>20</age>
12     </Person>
13 </Persons>

View Code

SAX方法：

 1 public class SaxParseService extends DefaultHandler {
 2     private List<Person> mPersons = null;
 3     private Person mPerson = null;
 4     private String m_preTag = null;
 5 
 6     public List<Person> getPersons(InputStream xmlStream)
 7             throws ParserConfigurationException, SAXException, IOException {
 8         SAXParserFactory factory = SAXParserFactory.newInstance();
 9         SAXParser parser = factory.newSAXParser();
10         SaxParseService handler = new SaxParseService();
11         parser.parse(xmlStream, handler);
12         return handler.getPersons();
13     }
14 
15     private List<Person> getPersons() {
16         return mPersons;
17     }
18 
19     @Override
20     public void startDocument() throws SAXException {
21         mPersons = new ArrayList<Person>();
22     }
23 
24     @Override
25     public void startElement(String uri, String localName, String qName,
26             Attributes attributes) throws SAXException {
27         if ("Person".equals(qName)) {
28             mPerson = new Person();
29             mPerson.setId(Integer.parseInt(attributes.getValue(0)));
30         }
31         m_preTag = qName;
32     }
33 
34     @Override
35     public void endElement(String uri, String localName, String qName)
36             throws SAXException {
37         if ("Person".equals(qName)) {
38             mPersons.add(mPerson);
39             mPerson = null;
40         }
41         m_preTag = null;
42     }
43 
44     @Override
45     public void characters(char[] ch, int start, int length)
46             throws SAXException {
47         if (m_preTag != null) {
48             String content = new String(ch, start, length);
49             if ("name".equals(m_preTag)) {
50                 mPerson.setName(content);
51             } else if ("sex".equals(m_preTag)) {
52                 mPerson.setSex(content);
53             } else if ("age".equals(m_preTag)) {
54                 mPerson.setAge(Integer.parseInt(content));
55             }
56         }
57     }
58 
59 }

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DOM方法：

 1 public class DomParseService {
 2     public List<Person> getPersons(InputStream is)
 3             throws ParserConfigurationException, SAXException, IOException {
 4         List<Person> mPersons = new ArrayList<Person>();
 5         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 6         DocumentBuilder builder = factory.newDocumentBuilder();
 7         Document element = builder.parse(is);
 8         NodeList PersonNodes = element.getElementsByTagName("Person");
 9         for (int i = 0; i < PersonNodes.getLength(); i++) {
10             Element PersonElement = (Element) PersonNodes.item(i);
11             Person mPerson = new Person();
12             mPerson.setId(Integer.parseInt(PersonElement.getAttribute("id")));
13             NodeList ChildNodes = PersonElement.getChildNodes();
14             for (int j = 0; j < ChildNodes.getLength(); j++) {
15                 if (ChildNodes.item(j).getNodeType() == Node.ELEMENT_NODE) {
16                     if("name".equals(ChildNodes.item(j).getNodeName())){
17                         mPerson.setName(ChildNodes.item(j).getFirstChild().getNodeValue());
18                     }else if("sex".equals(ChildNodes.item(j).getNodeName())){
19                         mPerson.setSex(ChildNodes.item(j).getFirstChild().getNodeValue());
20                     }else if("age".equals(ChildNodes.item(j).getNodeName())){
21                         mPerson.setAge(Integer.parseInt(ChildNodes.item(j).getFirstChild().getNodeValue()));
22                     }
23                 }
24             }
25             mPersons.add(mPerson);
26         }
27         return mPersons;
28 
29     }
30 }

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测试类如下。里面正对SAX和DOM分别写了两个方法：

 1 public class TestXml {
 2 
 3     public static void main(String[] args) {
 4         SaxParse();
 5         DomParse();
 6     }
 7     public static void DomParse() {
 8         DomParseService dps=new DomParseService();
 9         try {
10             List<Person> mPersons=dps.getPersons(new FileInputStream(new File("e:/Person.xml")));
11             for(Person p:mPersons){
12                 System.out.println(p.getName());
13             }
14         } catch (FileNotFoundException e) {
15             e.printStackTrace();
16         } catch (ParserConfigurationException e) {
17             e.printStackTrace();
18         } catch (SAXException e) {
19             e.printStackTrace();
20         } catch (IOException e) {
21             e.printStackTrace();
22         }
23     }
24     public static void SaxParse() {
25         SaxParseService sps=new SaxParseService();
26         try {
27              List<Person> Persons=sps.getPersons(new FileInputStream(new File("e:/Person.xml")));
28             for(Person p:Persons){
29                 System.out.println(p.getName());
30             }
31         } catch (FileNotFoundException e) {
32             e.printStackTrace();
33         } catch (ParserConfigurationException e) {
34             e.printStackTrace();
35         } catch (SAXException e) {
36             e.printStackTrace();
37         } catch (IOException e) {
38             e.printStackTrace();
39         }
40     }
41 
42 }

View Code