1、基于光标的解析
XMLInputFactory factory=XMLInputFactory.newInstance();
InputStream is=null;
is=TestStax.class.getClassLoader().getResourceAsStream("books.xml");//获取xml文件
XMLStreamReader reader=factory.createXMLStreamReader(is);
while (reader.hasNext()){
int type=reader.next();//XMLStreamReader分类型解析xml文本,XMLStreamReader提供常量来区分类型,分别有
XMLStreamConstants.START_ELEMENT元素,XMLStreamConstants.CHARACTERS文本等常量
if(type==XMLStreamConstants.START_ELEMENT){
System.out.println(reader.getName());
}else if(type==XMLStreamConstants.CHARACTERS){
System.out.println(reader.getName());
}else if(type==XMLStreamConstants.END_ELEMENT){
System.out.println(reader.getName());
}
2、基于迭代模型的方式,但效率不高,可增加过滤器实现高效率
XMLInputFactory factory=XMLInputFactory.newInstance();
InputStream is=null;
try {
is=TestStax.class.getClassLoader().getResourceAsStream("books.xml");
XMLEventReader reader=factory.createXMLEventReader(is);
while (reader.hasNext()){
XMLEvent event=reader.nextEvent();
if(event.isStartElement()){
String name=event.asStartElement().getName().toString();
if("title".equals(name)){
System.out.println(reader.getElementText());
}
}
}
//增加过滤器
XMLInputFactory factory = XMLInputFactory.newInstance();
InputStream is = null;
try {
is = TestStax.class.getClassLoader().getResourceAsStream(
"books.xml");
XMLEventReader reader = factory.createFilteredReader(
factory.createXMLEventReader(is), new EventFilter() {
@Override
public boolean accept(XMLEvent event) {
//这个地方增加过滤条件
if (event.isStartElement())
return true;
return false;
}
});
while (reader.hasNext()) {
XMLEvent event = reader.nextEvent();
if (event.isStartElement()) {
String name = event.asStartElement().getName().toString();
if ("title".equals(name)) {
System.out.println(reader.getElementText());
}
}
}
3、基于xpath的解析
模板xml文件
<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>