Android 开发工具类 21_SAXForHandler

解析 XML 有两种形式：

1、XMLReader

 XMLReaser  xmlReader = saxParser.getXMLReader();
 xmlReadeer.setContentHandler(hangdler);
 xmlREader.pase(new InputSource(is));

2、SAXParser

saxParser.parse(is, handler);

其实 SAXParser 是 JAXP(Java API for XML Processing) 对 XMLReader 的一个封装。

 import java.util.ArrayList;
 import java.util.List;

 import org.xml.sax.Attributes;
 import org.xml.sax.SAXException;
 import org.xml.sax.helpers.DefaultHandler;

 import android.util.Log;

 import com.wangjialin.domain.Person;

 public class SAXForHandler extends DefaultHandler {

     private static final String TAG = "SAXForHandler";
     private List<Person> persons;
     private String perTag ; // 通过此变量，记录前一个标签的名称。
     Person person;　　// 记录当前 Person

     public List<Person> getPersons() {
         return persons;
     }

     // 适合在此事件中触发初始化行为。
     public void startDocument() throws SAXException {
         persons = new ArrayList<Person>();
         Log.i(TAG , "***startDocument()***");
     }

     public void startElement(String uri, String localName, String qName,
             Attributes attributes) throws SAXException {

         if("person".equals(localName)){
             for ( int i = 0; i < attributes.getLength(); i++ ) {
                 Log.i(TAG ,"attributeName:" + attributes.getLocalName(i)
                         + "_attribute_Value:" + attributes.getValue(i));
                 person = new Person();
                 person.setId(Integer.valueOf(attributes.getValue(i)));
             }
         }
         perTag = localName;
         Log.i(TAG , qName+"***startElement()***");
     }

     public void characters(char[] ch, int start, int length) throws SAXException {

         String data = new String(ch, start, length).trim();
         if(!"".equals(data.trim())){
                Log.i(TAG ,"content: " + data.trim());
         }
         if("name".equals(perTag)){
                 person.setName(data);
         }else if("age".equals(perTag)){
                 person.setAge(new Short(data));
         }
     }

     public void endElement(String uri, String localName, String qName) throws SAXException {

         Log.i(TAG , qName + "***endElement()***");
         if("person".equals(localName)){
             persons.add(person);
             person = null;
         }
         perTag = null;
     }

     public void endDocument() throws SAXException {

         Log.i(TAG , "***endDocument()***");
     }
 }

Person.java

 package com.wangjialin.domain;

 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 testSAXGetPersons() throws Throwable{

         InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("wangjialin.xml");
         SAXForHandler saxForHandler = new SAXForHandler();
         // 获取 SAX 解析器的工厂对象
         SAXParserFactory spf = SAXParserFactory.newInstance();
         // 创建解析器对象
         SAXParser saxParser = spf.newSAXParser();
         // 设定解析的文件和自己定义的事件处理器对象
         saxParser.parse(inputStream, saxForHandler);

         List<Person> persons = saxForHandler.getPersons();
         inputStream.close();

         for(Person person:persons){
             Log.i(TAG, person.toString());
         }
     }

【参考】

http://blog.csdn.net/redarmy_chen/article/details/12951649