Android SAX解析XML

Android SAX解析XML

Android中有SAX、DOM及PULL等方式解析xml：

SAX是一种占用内存少且解析速度快的解析器，它采用的是事件启动。官方推荐使用

以下是通过网上 获取的天气xml文件

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <!-- published at 2011-12-14 14:55:05 -->  
3. <Profiles>  
4.     <Weather>  
5.         <city>广州</city>  
6.         <status1>多云</status1>  
7.         <status2>阴</status2>  
8.         <figure1>duoyun</figure1>  
9.         <figure2>yin</figure2>  
10.         <direction1>无持续风向</direction1>  
11.         <direction2>无持续风向</direction2>  
12.         <power1>≤3</power1>  
13.         <power2>≤3</power2>  
14.         <temperature1>20</temperature1>  
15.         <temperature2>12</temperature2>  
16.         <ssd>0</ssd>  
17.         <tgd1>21</tgd1>  
18.         <tgd2>21</tgd2>  
19.         <zwx>2</zwx>  
20.         <ktk>5</ktk>  
21.         <pollution>3</pollution>  
22.         <xcz>4</xcz>  
23.         <zho />  
24.         <diy />  
25.         <fas />  
26.         <chy>4</chy>  
27.         <zho_shuoming>暂无</zho_shuoming>  
28.         <diy_shuoming>暂无</diy_shuoming>  
29.         <fas_shuoming>暂无</fas_shuoming>  
30.         <chy_shuoming>套装、夹衣、风衣、夹克衫、西服套装、马甲衬衫配长裤</chy_shuoming>  
31.         <pollution_l>一般</pollution_l>  
32.         <zwx_l>弱</zwx_l>  
33.         <ssd_l>舒适</ssd_l>  
34.         <fas_l>暂无</fas_l>  
35.         <zho_l>暂无</zho_l>  
36.         <chy_l>夹衣类</chy_l>  
37.         <ktk_l>比较适宜(制热)</ktk_l>  
38.         <xcz_l>不太适宜</xcz_l>  
39.         <diy_l>暂无</diy_l>  
40.         <pollution_s>对空气污染物扩散无明显影响</pollution_s>  
41.         <zwx_s>紫外线弱</zwx_s>  
42.         <ssd_s>适宜在自然环境及露天场所活动。</ssd_s>  
43.         <ktk_s>比较适宜开启空调</ktk_s>  
44.         <xcz_s>洗车后未来1-2天内有降水、大风或沙尘天气，或洗车当日气温太低容易结冰。不太适宜洗车。</xcz_s>  
45.         <gm>1</gm>  
46.         <gm_l>低发期</gm_l>  
47.         <gm_s>天气舒适，不易发生感冒；</gm_s>  
48.         <yd>2</yd>  
49.         <yd_l>比较适宜</yd_l>  
50.         <yd_s>虽然天空云层较厚，比较适宜户外运动；</yd_s>  
51.         <savedate_weather>2011-12-14</savedate_weather>  
52.         <savedate_life>2011-12-14</savedate_life>  
53.         <savedate_zhishu>2011-12-14</savedate_zhishu>  
54.     </Weather>  
55. </Profiles>  

解析类：继承DefaultHandler类

1. package wu.lis.action;  
2.   
3. import org.xml.sax.Attributes;  
4. import org.xml.sax.SAXException;  
5. import org.xml.sax.helpers.DefaultHandler;  
6.   
7. import wu.lis.model.Weather;  
8. import wu.lis.util.Constant;  
9.   
10. public class WeatherHandler extends DefaultHandler {  
11.     private Weather weather;  
12.     private String preTag = null;// 作用是记录解析时的上一个节点名称  
13.   
14.     @Override  
15.     public void startDocument() throws SAXException {  
16.         weather = new Weather();  
17.         System.out.println("startDocument");  
18.     }  
19.   
20.     @Override  
21.     public void startElement(String uri, String localName, String qName,  
22.             Attributes attributes) throws SAXException {  
23.         preTag = qName;  
24.         System.out.println(preTag);  
25.     }  
26.   
27.     @Override  
28.     public void characters(char[] ch, int start, int length)  
29.             throws SAXException {  
30.         String result = new String(ch, start, length);  
31.   
32.         if (preTag.equals(Constant.City)) {  
33.             if (weather.getCity() == null)  
34.                 weather.setCity(result);  
35.         }  
36.         if (preTag.equals(Constant.Status1)) {  
37.             if (weather.getStatus1() == null)  
38.                 weather.setStatus1(result);  
39.         }  
40.         if (preTag.equals(Constant.Status2)) {  
41.             if (weather.getStatus2() == null)  
42.                 weather.setStatus2(result);  
43.         }  
44.         if (preTag.equals(Constant.Figure1)) {  
45.             if (weather.getFigure1() == null)  
46.                 weather.setFigure1(result);  
47.         }  
48.         if (preTag.equals(Constant.Figure2)) {  
49.             if (weather.getFigure2() == null)  
50.                 weather.setFigure2(result);  
51.         }  
52.   
53.         if (preTag.equals(Constant.Direction1)) {  
54.             if (weather.getDirection1() == null)  
55.                 weather.setDirection1(result);  
56.         }  
57.         if (preTag.equals(Constant.Direction2)) {  
58.             if (weather.getDirection2() == null)  
59.                 weather.setDirection2(result);  
60.         }  
61.   
62.         if (preTag.equals(Constant.Power1)) {  
63.             if (weather.getPower1() == null)  
64.                 weather.setPower1(result);  
65.         }  
66.         if (preTag.equals(Constant.Power2)) {  
67.             if (weather.getPower2() == null)  
68.                 weather.setPower2(result);  
69.         }  
70.   
71.         if (preTag.equals(Constant.Temperature1)) {  
72.             System.out.println(preTag);  
73.             if (weather.getTemperature1() == null)  
74.                 weather.setTemperature1(result);  
75.         }  
76.         if (preTag.equals(Constant.Temperature2)) {  
77.             if (weather.getTemperature2() == null)  
78.                 weather.setTemperature2(result);  
79.         }  
80.   
81.         if (preTag.equals(Constant.Ssd)) {  
82.             if (weather.getSsd() == null)  
83.                 weather.setSsd(result);  
84.         }  
85.         if (preTag.equals(Constant.Ssd_l)) {  
86.             if (weather.getSsd_l() == null)  
87.                 weather.setSsd_l(result);  
88.         }  
89.         if (preTag.equals(Constant.Ssd_s)) {  
90.             if (weather.getSsd_s() == null)  
91.                 weather.setSsd_s(result);  
92.         }  
93.   
94.         if (preTag.equals(Constant.Tgd1)) {  
95.             if (weather.getTgd1() == null)  
96.                 weather.setTgd1(result);  
97.         }  
98.         if (preTag.equals(Constant.Tgd2)) {  
99.             if (weather.getTgd2() == null)  
100.                 weather.setTgd2(result);  
101.         }  
102.   
103.         if (preTag.equals(Constant.Zwx)) {  
104.             if (weather.getZwx() == null)  
105.                 weather.setZwx(result);  
106.         }  
107.         if (preTag.equals(Constant.Zwx_l)) {  
108.             if (weather.getZwx_l() == null)  
109.                 weather.setZwx_l(result);  
110.         }  
111.         if (preTag.equals(Constant.Zwx_s)) {  
112.             if (weather.getZwx_s() == null)  
113.                 weather.setZwx_s(result);  
114.         }  
115.   
116.         if (preTag.equals(Constant.Ktk)) {  
117.             if (weather.getKtk() == null)  
118.                 weather.setKtk(result);  
119.         }  
120.         if (preTag.equals(Constant.Ktk_l)) {  
121.             if (weather.getKtk_l() == null)  
122.                 weather.setKtk_l(result);  
123.         }  
124.         if (preTag.equals(Constant.Ktk_s)) {  
125.             if (weather.getKtk_s() == null)  
126.                 weather.setKtk_s(result);  
127.         }  
128.   
129.         if (preTag.equals(Constant.Pollution))  
130.             if (weather.getPollution() == null)  
131.                 weather.setPollution(result);  
132.         if (preTag.equals(Constant.Pollution_l))  
133.             if (weather.getPollution_l() == null)  
134.                 weather.setPollution_l(result);  
135.         if (preTag.equals(Constant.Pollution_s))  
136.             if (weather.getPollution_s() == null)  
137.                 weather.setPollution_s(result);  
138.   
139.         if (preTag.equals(Constant.Xcz))  
140.             if (weather.getXcz() == null)  
141.                 weather.setXcz(result);  
142.         if (preTag.equals(Constant.Xcz_l))  
143.             if (weather.getXcz_l() == null)  
144.                 weather.setXcz_l(result);  
145.         if (preTag.equals(Constant.Xcz_s))  
146.             if (weather.getXcz_s() == null)  
147.                 weather.setXcz_s(result);  
148.   
149.         if (preTag.equals(Constant.Chy))  
150.             if (weather.getChy() == null)  
151.                 weather.setChy(result);  
152.         if (preTag.equals(Constant.Chy_l))  
153.             if (weather.getChy_l() == null)  
154.                 weather.setChy_l(result);  
155.         if (preTag.equals(Constant.Chy_shuoming))  
156.             if (weather.getChy_shuoming() == null)  
157.                 weather.setChy_shuoming(result);  
158.   
159.         if (preTag.equals(Constant.Gm))  
160.             if (weather.getGm() == null)  
161.                 weather.setGm(result);  
162.         if (preTag.equals(Constant.Gm_l))  
163.             if (weather.getGm_l() == null)  
164.                 weather.setGm_l(result);  
165.         if (preTag.equals(Constant.Gm_s))  
166.             if (weather.getGm_s() == null)  
167.                 weather.setGm_s(result);  
168.   
169.         if (preTag.equals(Constant.Yd))  
170.             if (weather.getYd() == null)  
171.                 weather.setYd(result);  
172.         if (preTag.equals(Constant.Yd_l))  
173.             if (weather.getYd_l() == null)  
174.                 weather.setYd_l(result);  
175.         if (preTag.equals(Constant.Yd_s))  
176.             if (weather.getYd_s() == null)  
177.                 weather.setYd_s(result);  
178.   
179.         if (preTag.equals(Constant.Savedate_weather))  
180.             if (weather.getSavedate_weather() == null)  
181.                 weather.setSavedate_weather(result);  
182.         if (preTag.equals(Constant.Savedate_life))  
183.             if (weather.getSavedate_life() == null)  
184.                 weather.setSavedate_life(result);  
185.         if (preTag.equals(Constant.Savedate_zhishu))  
186.             if (weather.getSavedate_zhishu() == null)  
187.                 weather.setSavedate_zhishu(result);  
188.     }  
189.   
190.     @Override  
191.     public void endElement(String uri, String localName, String qName)  
192.             throws SAXException {  
193.         if (qName.equals("Profiles")) {  
194.             preTag = null;  
195.         }  
196.     }  
197.   
198.     @Override  
199.     public void endDocument() throws SAXException {  
200.         super.endDocument();  
201.         System.out.println("城市：" + weather.getCity());  
202.         System.out.println("白天：" + weather.getStatus1());  
203.         System.out.println("夜间：" + weather.getStatus2());  
204.         System.out.println("白天风向:"+weather.getDirection1());  
205.         System.out.println("夜间风向:"+weather.getDirection2());  
206.         System.out.println("白天温度：" + weather.getTemperature1());  
207.         System.out.println("夜间温度：" + weather.getTemperature2());  
208.     }  
209. }  

调用解析

1. InputStream inStream = getClass().getClassLoader().getResourceAsStream("weather.xml");  
2.         System.out.println(result);  
3.         SAXParserFactory factory = SAXParserFactory.newInstance();  
4.         try {  
5.             SAXParser parser = factory.newSAXParser();  
6.             XMLReader reader = parser.getXMLReader();  
7.             reader.setContentHandler(new WeatherHandler());  
8.             reader.parse(new InputSource(inStream));  
9.         } catch (Exception e) {  
10.             e.printStackTrace();  
11.         }