Android 开发工具类 13

Android 开发工具类 13_ SaxService

网络 xml 解析方式

 1 package com.example.dashu_saxxml;
 2 
 3 import java.io.IOException;
 4 import java.io.InputStream;
 5 import java.util.HashMap;
 6 import java.util.List;
 7 
 8 import javax.xml.parsers.SAXParser;
 9 import javax.xml.parsers.SAXParserFactory;
10 
11 import org.xml.sax.InputSource;
12 import org.xml.sax.SAXParseException;
13 
14 public class SaxService {
15     public SaxService() {
16     }
17 
18     /**
19      * 网络xml解析方式
20      * */
21     public static List<HashMap<String, String>> readXML(
22             InputStream inputStream, String nodeName) {
23         List<HashMap<String, String>>list=null;
24         try {
25             //创建一个解析xml工厂对象
26             SAXParserFactory saxParserFactory=SAXParserFactory.newInstance();
27             SAXParser parser=saxParserFactory.newSAXParser();//解析xml
28             MyHandler myHandler=new MyHandler(nodeName);
29             parser.parse(inputStream, myHandler);
30             list=myHandler.getList();
31             inputStream.close();//关闭io
32         } catch (Exception e) {
33             // TODO: handle exception
34         }
35         return list;
36     }
37 }

MyHandler 继承 DefaultHandler 解析工具类

 1 package com.example.dashu_saxxml;
 2 
 3 import java.util.ArrayList;
 4 import java.util.HashMap;
 5 import java.util.List;
 6 
 7 import org.xml.sax.Attributes;
 8 import org.xml.sax.SAXException;
 9 import org.xml.sax.helpers.DefaultHandler;
10 
11 import android.R.integer;
12 
13 public class MyHandler extends DefaultHandler {
14     private HashMap<String, String> map = null;// 存储单个解析的完整对象
15     List<HashMap<String, String>> list = null;// 存储所以的解析对象
16     private String currentTag = null;// 正在解析元素的标签
17     private String currentValue = null;// 正在解析元素的值
18     private String nodeName = null;// 当前解析节点名称
19 
20     public MyHandler(String nodeName) {
21         super();
22         this.nodeName = nodeName;
23     }
24 
25     public List<HashMap<String, String>> getList() {
26         return list;
27     }
28 
29     /**
30      * xml文件开始解析时候调用的方法
31      * */
32     @Override
33     public void startDocument() throws SAXException {
34         // TODO Auto-generated method stub
35         list = new ArrayList<HashMap<String, String>>();
36         super.startDocument();
37     }
38 
39     /**
40      * 解析到节点开头调用方法<name>
41      * */
42     @Override
43     public void startElement(String uri, String localName, String qName,
44             Attributes attributes) throws SAXException {
45         // TODO Auto-generated method stub
46         if (qName.equals(nodeName)) {
47             map = new HashMap<String, String>();
48         }
49         if (attributes != null && map != null) {
50             for (int i = 0; i < attributes.getLength(); i++) {
51                 map.put(attributes.getQName(i), attributes.getValue(i));
52             }
53         }
54         currentTag = qName;
55     }
56 
57     /**
58      * 解析到节点开头结尾中间夹的文字所调用的方法
59      * */
60     @Override
61     public void characters(char[] ch, int start, int length)
62             throws SAXException {
63         // TODO Auto-generated method stub
64         if (currentTag != null && map != null) {
65             currentValue = new String(ch, start, length);
66             if (currentValue != null && !currentValue.trim().equals("")
67                     && !currentValue.trim().equals("
")) {
68                 map.put(currentTag, currentValue);
69             }
70         }
71         currentTag = null;// 把当前节点对应的值和标签设置为空
72         currentValue = null;
73     }
74 
75     /**
76      * 解析到节点结尾调用方法</name>
77      * */
78     @Override
79     public void endElement(String uri, String localName, String qName)
80             throws SAXException {
81         // 遇到结束标记时候
82         if (qName.equals(nodeName)) {
83             list.add(map);
84             map = null;
85         }
86     }
87 }

dashu.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <user-list>
 3     <user id="1">
 4         <name>大树</name>
 5         <age>22</age>
 6     </user>
 7     
 8     <user id="2">
 9         <name>梅子</name>
10         <age>28</age>
11     </user>
12 
13     <user id="3">
14         <name>爸爸</name>
15         <age>48</age>
16     </user>
17     
18     <user id="4">
19         <name>妈妈</name>
20         <age>48</age>
21     </user>
22 </user-list>

【参考文献】

http://blog.csdn.net/u010794950/article/details/24553733