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Java中Sax解析XML
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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
