Android 开发工具类 22_PullPersonService

浏览数：20 / 时间：2015年06月11日

PULL 解析 XML

 1 import java.io.InputStream;
 2 import java.io.OutputStream;
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import org.xmlpull.v1.XmlPullParser;
 7 import org.xmlpull.v1.XmlSerializer;
 8 
 9 import android.util.Xml;
10 
11 import com.wangjialin.domain.Person;
12 
13 public class PullPersonService {
14     // 生成 XML
15     public static void save(List<Person> persons, OutputStream outStream) throws Exception{
16         
17         XmlSerializer serializer = Xml.newSerializer();
18         serializer.setOutput(outStream, "UTF-8");
19         serializer.startDocument("UTF-8", true);
20         serializer.startTag(null, "persons");
21         
22         for(Person person : persons){
23             serializer.startTag(null, "person");
24             serializer.attribute(null, "id", person.getId().toString());
25             serializer.startTag(null, "name");
26             serializer.text(person.getName());
27             serializer.endTag(null, "name");
28             
29             serializer.startTag(null, "age");
30             serializer.text(person.getAge().toString());
31             serializer.endTag(null, "age");
32             
33             serializer.endTag(null, "person");
34         }        
35         serializer.endTag(null, "persons");
36         serializer.endDocument();
37         outStream.flush();
38         outStream.close();
39     }
40 
41     public static List<Person> getPersons(InputStream inStream) throws Exception{
42         
43         Person person = null;
44         List<Person> persons = null;
45         XmlPullParser pullParser = Xml.newPullParser();
46         pullParser.setInput(inStream, "UTF-8");
47         int event = pullParser.getEventType();　　// 触发第一个事件
48         
49         while(event != XmlPullParser.END_DOCUMENT){
50             switch (event) {
51             case XmlPullParser.START_DOCUMENT:
52                 persons = new ArrayList<Person>();
53                 break;
54             case XmlPullParser.START_TAG:
55                 if("person".equals(pullParser.getName())){
56                     int id = new Integer(pullParser.getAttributeValue(0));
57                     person = new Person();
58                     person.setId(id);
59                 }
60                 if(person != null){
61                     if("name".equals(pullParser.getName())){
62                         person.setName(pullParser.nextText());
63                     }
64                     if("age".equals(pullParser.getName())){
65                         person.setAge(new Short(pullParser.nextText()));
66                     }
67                 }
68                 break;
69                 
70             case XmlPullParser.END_TAG:
71                 if("person".equals(pullParser.getName())){
72                     persons.add(person);
73                     person = null;
74                 }
75                 break;
76             }
77             event = pullParser.next();
78         }
79         return persons;
80     }
81 }

JUnit 测试

 1 public void testPullgetPersons() throws Throwable{
 2         
 3         InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("wangjialin.xml");
 4         List<Person> persons = PullPersonService.getPersons(inStream);
 5         
 6         for(Person person : persons){
 7             Log.i(TAG, person.toString());
 8         }
 9     }
10     
11     public void testSave()     throws Throwable{
12         
13         File file = new File(this.getContext().getFilesDir(), "wangjialin.xml");
14         FileOutputStream outStream = new FileOutputStream(file);
15         
16         List<Person> persons = new ArrayList<Person>();
17         persons.add(new Person(90, "wangjialin", (short)13));
18         persons.add(new Person(35, "jialingege", (short)23));
19         persons.add(new Person(78, "Android", (short)33));
20         
21         PullPersonService.save(persons, outStream);
22     }

wangjialin.xml

 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>