Java 使用SAX解析xml文件

下面的代码可以直接跑，希望能为初学使用SAX解析xml文件的朋友节省时间

packageparseXML;

importorg.apache.xerces.parsers.SAXParser;
importorg.xml.sax.Attributes;
importorg.xml.sax.helpers.DefaultHandler;

//第一种方法直接解析
publicclassSAXDemoextendsDefaultHandler{

publicstaticvoidmain(String[]args){
try{

SAXParserparser=
(SAXParser)Class.forName("org.apache.xerces.parsers.SAXParser").newInstance();
SAXDemohandler=newSAXDemo();
parser.setContentHandler(handler);
parser.parse("parseXML/test.xml");


}catch(Exceptione){
System.out.println(e.toString());
}
}

publicvoidstartElement(Stringuri,StringlocalName,StringqName,Attributesattr){
System.out.println("Element的开始uri:"+uri+"|localName:"+localName+"|qName:"+qName);
if(attr.getLength()>0){
for(inti=0;i<attr.getLength();i++){
System.out.println(attr.getQName(i)+"="+attr.getValue(i));
}
}
}

publicvoidendElement(Stringuri,StringlocalName,StringqName){
System.out.println("Element的结束uri:"+uri+"localName:"+localName+"qName:"+qName);
System.out.println("=============================================================");
}

}

packageparseXML;

importorg.apache.xerces.parsers.SAXParser;
importorg.xml.sax.Attributes;
importorg.xml.sax.SAXException;
importorg.xml.sax.helpers.AttributesImpl;
importorg.xml.sax.helpers.DefaultHandler;
importorg.xml.sax.helpers.XMLFilterImpl;

//第二种方法：使用filter解析
publicclassSAXDemo2extendsDefaultHandler{

publicstaticvoidmain(String[]args){
try{
//生成SAXParser
SAXParserparser=
(SAXParser)Class.forName("org.apache.xerces.parsers.SAXParser").newInstance();
//生成Handler
SAXDemo2handler=newSAXDemo2();

FilterHandlerfilter=newFilterHandler();

//将刚才生成的handler和parser配置进filter
filter.setParent(parser);
filter.setContentHandler(handler);

filter.parse("parseXML/test.xml");
}catch(Exceptione){
System.out.println(e.toString());
}
}

publicvoidstartElement(Stringuri,StringlocalName,StringqName,Attributesattr){
System.out.println("Element的开始uri:"+uri+"|localName:"+localName+"|qName:"+qName);
if(attr.getLength()>0){
for(inti=0;i<attr.getLength();i++){
System.out.println(attr.getQName(i)+"="+attr.getValue(i));
}
}
}

publicvoidendElement(Stringuri,StringlocalName,StringqName){
System.out.println("Element的结束uri:"+uri+"localName:"+localName+"qName:"+qName);
System.out.println("=============================================================");
}

staticclassFilterHandlerextendsXMLFilterImpl{
intindex=0;

publicvoidstartElement(Stringuri,StringlocalName,StringqName,Attributesattr)throwsSAXException{
AttributesImplattrImpl=newAttributesImpl(attr);
for(inti=0;i<attrImpl.getLength();i++){
if(attrImpl.getQName(i).toUpperCase().equals("ID")){
attrImpl.removeAttribute(i);
break;
}
}
attrImpl.addAttribute("","id","id","ID",String.valueOf(index++));
super.startElement(uri,localName,qName,attrImpl);
}

publicvoidendElement(Stringuri,StringlocalName,StringqName)throwsSAXException{
super.endElement(uri,localName,qName);
}

publicvoidcharacters(char[]ch,intiStart,intiLength)throwsSAXException{
super.characters(ch,iStart,iLength);
}
}
}