<span style="font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<书架>
<书>
<书名>java就业培训教程</书名>
<作者>郝斌</作者>
<售价>36.2元</售价>
</书>
<书>
<书名 name="xxx">javascript就业培训教程</书名>
<作者>哈哈哈</作者>
<售价>36.2元</售价>
</书>
</书架>
</span>
<span style="font-size:14px;">package com.rj.sax;
public class Book {
private String name;
private String author;
private String price;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
}
</span>
<span style="font-size:14px;">package com.rj.sax;import java.io.IOException;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.Attributes;import org.xml.sax.ContentHandler;import org.xml.sax.Locator;import org.xml.sax.SAXException;import org.xml.sax.XMLReader;public class Demo1 {/** * sax 解析xml文档 * @throws SAXException * @throws ParserConfigurationException * @throws IOException */public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {//1.创建解析工厂SAXParserFactory factory = SAXParserFactory.newInstance();//2.得到解析器SAXParser sp = factory.newSAXParser();//3.得到读取器XMLReader reader = sp.getXMLReader();//4.设置内容处理reader.setContentHandler(new ListHandler());//5.读取xml文档内容reader.parse("src/book.xml");}}//得到xml文档所有内容class ListHandler implements ContentHandler{//ContentHandler-->内容处理器@Overridepublic void setDocumentLocator(Locator locator) {}@Overridepublic void startDocument() throws SAXException {}@Overridepublic void endDocument() throws SAXException {}@Overridepublic void startPrefixMapping(String prefix, String uri)throws SAXException {}@Overridepublic void endPrefixMapping(String prefix) throws SAXException {}//查找到元素会调用这个方法@Overridepublic void startElement(String uri, String localName, String qName,Attributes atts) throws SAXException {System.out.println("<"+qName+">");for(int i=0;atts!=null && i<atts.getLength();i++){//atts!=null && i<atts.getLength();以后写代码的时候尽量这样写,不要写if(atts!=null)String name = atts.getQName(i);String value = atts.getValue(i); System.out.println(name+"="+value);}}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {System.out.println("<"+qName+"/>");}//内容处理的方法@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {System.out.println(new String(ch,start,length));}@Overridepublic void ignorableWhitespace(char[] ch, int start, int length)throws SAXException {}@Overridepublic void processingInstruction(String target, String data)throws SAXException {}@Overridepublic void skippedEntity(String name) throws SAXException {}}</span>
<span style="font-size:14px;">package com.rj.sax;
import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
public class Demo2 {
/**
* sax 解析xml文档
* @throws SAXException
* @throws ParserConfigurationException
* @throws IOException
*/
public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
//1.创建解析工厂
SAXParserFactory factory = SAXParserFactory.newInstance();
//2.得到解析器
SAXParser sp = factory.newSAXParser();
//3.得到读取器
XMLReader reader = sp.getXMLReader();
//4.设置内容处理
reader.setContentHandler(new TagValueHandler());
//5.读取xml文档内容
reader.parse("src/book.xml");
}
}
//ContentHandler -->处理器
//DefaultHandler是ContentHandler接口的实现类
//获得指定标签的值 -->第二本书 <作者>张孝祥</作者>
class TagValueHandler extends DefaultHandler{
private String currentTag;//记录当前解析到的是什么标签
private int needNumber = 2;//记住想获取第几个作者的标签
private int currentNumber; //当前解析到的是第几个
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
currentTag = qName;
if(currentTag.equals("作者")){
currentNumber++;
}
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if("作者".equals(currentTag) && currentNumber==needNumber){
System.out.println(new String(ch,start,length));
}
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
currentTag = null;
}
}
</span>
<span style="font-size:14px;">package com.rj.sax;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
public class Demo3 {
/**
* sax 解析xml文档
* @throws SAXException
* @throws ParserConfigurationException
* @throws IOException
*/
public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
//1.创建解析工厂
SAXParserFactory factory = SAXParserFactory.newInstance();
//2.得到解析器
SAXParser sp = factory.newSAXParser();
//3.得到读取器
XMLReader reader = sp.getXMLReader();
//4.设置内容处理
BeanListhandler handler = new BeanListhandler();
reader.setContentHandler(handler);
//5.读取xml文档内容
reader.parse("src/book.xml");
List<Book> list = handler.getList();
System.out.println(list);
}
}
//ContentHandler -->处理器
//DefaultHandler是ContentHandler接口的实现类
class BeanListhandler extends DefaultHandler{
private List list = new ArrayList();
private String currentTag ;
private Book book;
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
currentTag = qName;
if("书名".equals(currentTag)){
book = new Book();
}
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if("书名".equals(currentTag)){
String name = new String(ch,start,length);
book.setName(name);
}
if("作者".equals(currentTag)){
String author = new String(ch,start,length);
book.setAuthor(author);
}
if("售价".equals(currentTag)){
String price = new String(ch,start,length);
book.setPrice(price);
}
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
//当遇到每一本书的结束标签的时候,说明一本书已经存贮完毕,要存到List集合中,等待下一本书的存贮
if("书".equals(qName)){
list.add(book);
}
currentTag = null;
}
//提供一个List的集合,让外界使用
public List<Book> getList() {
return list;
}
}
</span>
