Android 开发工具类 20

Android 开发工具类 20_DOMPersonService

xml 文件

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <persons>
 3     <person id = "23">
 4         <name>NEwii</name>
 5         <age>21</age>
 6     </person>
 7     <person id = "20">
 8         <name>WiiWill</name>
 9         <age>25</age>
10     </person>
11 </persons>

DOM 格式

DOM 解析 XML

 1 import java.io.InputStream;
 2 import java.util.ArrayList;
 3 import java.util.List;
 4 
 5 import javax.xml.parsers.DocumentBuilder;
 6 import javax.xml.parsers.DocumentBuilderFactory;
 7 
 8 import org.w3c.dom.Document;
 9 import org.w3c.dom.Element;
10 import org.w3c.dom.Node;
11 import org.w3c.dom.NodeList;
12 
13 import com.wangjialin.domain.Person;
14 
15 public class DOMPersonService {
16     
17     public static List<Person> getPersons(InputStream inStream) throws Exception{
18         
19         List<Person> persons = new ArrayList<Person>();
20         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
21         DocumentBuilder builder = factory.newDocumentBuilder();
22         Document document = builder.parse(inStream);
23         Element root = document.getDocumentElement();
24         NodeList personNodes = root.getElementsByTagName("person");
25         
26         for(int i=0; i < personNodes.getLength() ; i++){
27             
28             Element personElement = (Element)personNodes.item(i);
29             int id = new Integer(personElement.getAttribute("id"));
30             Person person = new Person();
31             person.setId(id);
32             NodeList childNodes = personElement.getChildNodes();
33             
34             for(int y=0; y < childNodes.getLength(); y++){
35                 if(childNodes.item(y).getNodeType() == Node.ELEMENT_NODE){
36                     if("name".equals(childNodes.item(y).getNodeName())){
37                         String name = childNodes.item(y).getFirstChild().getNodeValue();
38                         person.setName(name);
39                     }else if("age".equals(childNodes.item(y).getNodeName())){
40                         String age = childNodes.item(y).getFirstChild().getNodeValue();
41                         person.setAge(new Short(age));
42                     }
43                 }
44             }
45             persons.add(person);
46         }
47         inStream.close();
48         return persons;
49     }
50 }

Person.java

 1 public class Person {
 2     
 3     private Integer id;
 4     private String name;
 5     private Short age;
 6 
 7     public Person(){}
 8     
 9     public Person(Integer id, String name, Short age) {
10         this.id = id;
11         this.name = name;
12         this.age = age;
13     }
14     
15     public Person(String name, Short age) {
16         this.name = name;
17         this.age = age;
18     }
19     
20     public Integer getId() {
21         return id;
22     }
23 
24     public void setId(Integer id) {
25         this.id = id;
26     }
27 
28     public String getName() {
29         return name;
30     }
31 
32     public void setName(String name) {
33         this.name = name;
34     }
35 
36     public Short getAge() {
37         return age;
38     }
39 
40     public void setAge(Short age) {
41         this.age = age;
42     }
43 
44     @Override
45     public String toString() {
46         return "id=" + id + ",name=" + name+ ",age=" + age;
47     }
48     
49 
50 }

JUnit 测试

1 public void testDOMgetPersons() throws Throwable{
2         
3         InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("wangjialin.xml");
4         List<Person> persons = DOMPersonService.getPersons(inStream);
5         
6         for(Person person : persons){
7             Log.i(TAG, person.toString());
8         }
9     }