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

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Java中Sax解析XML

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