Java中Sax解析XML

SAX基于事件的解析，解析器在一次读取XML文件中根据读取的数据产生相应的事件，由应用程序实现相应的事件处理逻辑，即它是一种“推”的解析方式；
这种解析方法速度快、占用内存少，但是它需要应用程序自己处理解析器的状态，实现起来会比较麻烦。

dom4j解析xml: http://www.cnblogs.com/gavinYang/p/3505535.html
jdom解析xml: http://www.cnblogs.com/gavinYang/p/3505530.html
dom解析: http://www.cnblogs.com/gavinYang/p/3505523.html

Java代码：

 package com.test;

 import java.io.File;
 import java.io.FileInputStream;
 import java.util.ArrayList;
 import java.util.List;

 import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;

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

 public class SaxXML {

     public static void main(String[] args) {
         File file = new File("e:/People.xml");
         try {
             SAXParserFactory spf = SAXParserFactory.newInstance();
             SAXParser parser = spf.newSAXParser();
             SaxHandler handler = new SaxHandler("People");
             parser.parse(new FileInputStream(file), handler);

             List<People> peopleList = handler.getPeoples();
             for(People people : peopleList){
                 System.out.println(people.getId()+"\t"+people.getName()+"\t"+people.getEnglishName()+"\t"+people.getAge());
             }
         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }

 }

 class SaxHandler extends DefaultHandler {
     private List<People> peoples = null;
     private People people;
     private String currentTag = null;
     private String currentValue = null;
     private String nodeName = null;

     public List<People> getPeoples() {
         return peoples;
     }

     public SaxHandler(String nodeName) {
         this.nodeName = nodeName;
     }

     @Override
     public void startDocument() throws SAXException {
         // TODO 当读到一个开始标签的时候，会触发这个方法
         super.startDocument();

         peoples = new ArrayList<People>();
     }

     @Override
     public void endDocument() throws SAXException {
         // TODO 自动生成的方法存根
         super.endDocument();
     }

     @Override
     public void startElement(String uri, String localName, String name,
             Attributes attributes) throws SAXException {
         // TODO 当遇到文档的开头的时候，调用这个方法
         super.startElement(uri, localName, name, attributes);

         if (name.equals(nodeName)) {
             people = new People();
         }
         if (attributes != null && people != null) {
             for (int i = 0; i < attributes.getLength(); i++) {
                 if(attributes.getQName(i).equals("id")){
                     people.setId(attributes.getValue(i));
                 }
                 else if(attributes.getQName(i).equals("en")){
                     people.setEnglishName(attributes.getValue(i));
                 }
             }
         }
         currentTag = name;
     }

     @Override
     public void characters(char[] ch, int start, int length)
             throws SAXException {
         // TODO 这个方法用来处理在XML文件中读到的内容
         super.characters(ch, start, length);

         if (currentTag != null && people != null) {
             currentValue = new String(ch, start, length);
             if (currentValue != null && !currentValue.trim().equals("") && !currentValue.trim().equals("\n")) {
                 if(currentTag.equals("Name")){
                     people.setName(currentValue);
                 }
                 else if(currentTag.equals("Age")){
                     people.setAge(currentValue);
                 }
             }
         }
         currentTag = null;
         currentValue = null;
     }

     @Override
     public void endElement(String uri, String localName, String name)
             throws SAXException {
         // TODO 在遇到结束标签的时候，调用这个方法
         super.endElement(uri, localName, name);

         if (name.equals(nodeName)) {
             peoples.add(people);
         }
     }

 }

People对象：

 package com.test;

 public class People {
     private String id;
     private String name;
     private String englishName;
     private String age;
     public String getId() {
         return id;
     }
     public void setId(String id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getEnglishName() {
         return englishName;
     }
     public void setEnglishName(String englishName) {
         this.englishName = englishName;
     }
     public String getAge() {
         return age;
     }
     public void setAge(String age) {
         this.age = age;
     }

 }

xml:

 <?xml version="1.0" encoding="UTF-8"?>
 <PeopleList>
     <People id="1">
         <Name en='zhangsan'>张三</Name>
         <Age>20</Age>
     </People>
     <People id="2">
         <Name en='lisi'>李四</Name>
         <Age>30</Age>
     </People>
 </PeopleList>

原文出自:http://blog.csdn.net/zyting_love/article/details/6929307