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：
<?xml version="1.0" encoding="gbk"?>
<Persons>
<Person id="1">
<name>zhangsan</name>
<sex>男</sex>
<age>30</age>
</Person>
<Person id="2">
<name>lisi</name>
<sex>女</sex>
<age>20</age>
</Person>
</Persons>
- SAX方法：
public class SaxParseService extends DefaultHandler {
private List<Person> mPersons = null;
private Person mPerson = null;
private String m_preTag = null;
public List<Person> getPersons(InputStream xmlStream)
throws ParserConfigurationException, SAXException, IOException {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
SaxParseService handler = new SaxParseService();
parser.parse(xmlStream, handler);
return handler.getPersons();
}
private List<Person> getPersons() {
return mPersons;
}
@Override
public void startDocument() throws SAXException {
mPersons = new ArrayList<Person>();
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if ("Person".equals(qName)) {
mPerson = new Person();
mPerson.setId(Integer.parseInt(attributes.getValue(0)));
}
m_preTag = qName;
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if ("Person".equals(qName)) {
mPersons.add(mPerson);
mPerson = null;
}
m_preTag = null;
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (m_preTag != null) {
String content = new String(ch, start, length);
if ("name".equals(m_preTag)) {
mPerson.setName(content);
} else if ("sex".equals(m_preTag)) {
mPerson.setSex(content);
} else if ("age".equals(m_preTag)) {
mPerson.setAge(Integer.parseInt(content));
}
}
}
}
- DOM方法：
public class DomParseService {
public List<Person> getPersons(InputStream is)
throws ParserConfigurationException, SAXException, IOException {
List<Person> mPersons = new ArrayList<Person>();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document element = builder.parse(is);
NodeList PersonNodes = element.getElementsByTagName("Person");
for (int i = 0; i < PersonNodes.getLength(); i++) {
Element PersonElement = (Element) PersonNodes.item(i);
Person mPerson = new Person();
mPerson.setId(Integer.parseInt(PersonElement.getAttribute("id")));
NodeList ChildNodes = PersonElement.getChildNodes();
for (int j = 0; j < ChildNodes.getLength(); j++) {
if (ChildNodes.item(j).getNodeType() == Node.ELEMENT_NODE) {
if("name".equals(ChildNodes.item(j).getNodeName())){
mPerson.setName(ChildNodes.item(j).getFirstChild().getNodeValue());
}else if("sex".equals(ChildNodes.item(j).getNodeName())){
mPerson.setSex(ChildNodes.item(j).getFirstChild().getNodeValue());
}else if("age".equals(ChildNodes.item(j).getNodeName())){
mPerson.setAge(Integer.parseInt(ChildNodes.item(j).getFirstChild().getNodeValue()));
}
}
}
mPersons.add(mPerson);
}
return mPersons;
}
}
测试类如下。里面正对SAX和DOM分别写了两个方法：
public class TestXml {
public static void main(String[] args) {
SaxParse();
DomParse();
}
public static void DomParse() {
DomParseService dps=new DomParseService();
try {
List<Person> mPersons=dps.getPersons(new FileInputStream(new File("e:/Person.xml")));
for(Person p:mPersons){
System.out.println(p.getName());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void SaxParse() {
SaxParseService sps=new SaxParseService();
try {
List<Person> Persons=sps.getPersons(new FileInputStream(new File("e:/Person.xml")));
for(Person p:Persons){
System.out.println(p.getName());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}