Android 开发工具类 20_DOMPersonService

xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<persons>
    <person id = "23">
        <name>NEwii</name>
        <age>21</age>
    </person>
    <person id = "20">
        <name>WiiWill</name>
        <age>25</age>
    </person>
</persons>

 DOM 格式

 DOM 解析 XML 

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.wangjialin.domain.Person;

public class DOMPersonService {
    
    public static List<Person> getPersons(InputStream inStream) throws Exception{
        
        List<Person> persons = new ArrayList<Person>();
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse(inStream);
        Element root = document.getDocumentElement();
        NodeList personNodes = root.getElementsByTagName("person");
        
        for(int i=0; i < personNodes.getLength() ; i++){
            
            Element personElement = (Element)personNodes.item(i);
            int id = new Integer(personElement.getAttribute("id"));
            Person person = new Person();
            person.setId(id);
            NodeList childNodes = personElement.getChildNodes();
            
            for(int y=0; y < childNodes.getLength(); y++){
                if(childNodes.item(y).getNodeType() == Node.ELEMENT_NODE){
                    if("name".equals(childNodes.item(y).getNodeName())){
                        String name = childNodes.item(y).getFirstChild().getNodeValue();
                        person.setName(name);
                    }else if("age".equals(childNodes.item(y).getNodeName())){
                        String age = childNodes.item(y).getFirstChild().getNodeValue();
                        person.setAge(new Short(age));
                    }
                }
            }
            persons.add(person);
        }
        inStream.close();
        return persons;
    }
}

Person.java

public class Person {
    
    private Integer id;
    private String name;
    private Short age;

    public Person(){}
    
    public Person(Integer id, String name, Short age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }
    
    public Person(String name, Short age) {
        this.name = name;
        this.age = age;
    }
    
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Short getAge() {
        return age;
    }

    public void setAge(Short age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "id=" + id + ",name=" + name+ ",age=" + age;
    }
    

}

 JUnit 测试

public void testDOMgetPersons() throws Throwable{
        
        InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("wangjialin.xml");
        List<Person> persons = DOMPersonService.getPersons(inStream);
        
        for(Person person : persons){
            Log.i(TAG, person.toString());
        }
    }