Dom解析XML常见的操作
XmlArgs.java文件://常量类
public class XmlArgs {
public static final String XML_HR = "lib/xml/hr.xml";
public static final String XML_HRD = "lib/xml/hr.dtd";
public static final String XML_STU = "lib/xml/students.xml";
public static final String XML_BOOK = "lib/xml/books.xml";
}
DomOper.java文件:
import java.io.File; www.zzzyk.com
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.OutputKeys;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.Entity;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Notation;
public class DomOper {
public static void main(String[] args) {
DomOper.createXml();
//DomOper.readXml();
//DomOper.printXml(1);
//DomOper.printXml(2);
//DomOper.addNode();
//DomOper.delNode();
//DomOper.upNode();
}
public static void createXml(){
try{
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.newDocument();
Element root = doc.createElement("老师");
Element wNode = doc.createElement("王");
wNode.appendChild(doc.createTextNode("我是王老师"));
root.appendChild(wNode);
doc.appendChild(root);
Transformer trans = TransformerFactory.newInstance().newTransformer();
trans.setOutputProperty(OutputKeys.ENCODING,"utf-8");
trans.setOutputProperty(OutputKeys.INDENT,"yes");
trans.transform(new DOMSource(doc),new StreamResult("C:/new.xml"));
}catch(Exception e){
e.printStackTrace();
}
}
public static void readXml(){
try{
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(new File(XmlArgs.XML_HR));
DocumentType docType = doc.getDoctype();
if(docType!=null){
System.out.println("DTD名称:"+docType.getName());
System.out.println("DTD公共ID:"+docType.getPublicId());
System.out.println("DTD系统ID:"+docType.getSystemId());
System.out.println("DTD内部子集:"+docType.getInternalSubset());
NamedNodeMap ens = docType.getEntities();
for(int i=0;i<ens.getLength();i++){
Entity en = (Entity)ens.item(i);
System.out.println("第"+(i+1)+"个实体");
System.out.println("实体名称:"+en.getNodeName());
System.out.println("标记名称:"+en.getNotationName());
System.out.println("实体公共ID:"+en.getPublicId());
System.out.println("实体系统ID:"+en.getSystemId());
}
NamedNodeMap nos = docType.getNotations();
for(int j=0;j<nos.getLength();j++) {
Notation no = (Notation)nos.item(j);
System.out.println("第"+(j+1)+"个标记");
System.out.println("标记名称:"+no.getNodeName());
System.out.println("标记公共ID:"+no.getPublicId());
System.out.println("标记系统ID:"+no.getSystemId());
}
}
}catch(Exception e){
e.printStackTrace();
}
}
public static void printXml(int type){
try{
DocumentBuilderFactory fac = DocumentBuilderFactory.newInstance();
fac.setNamespaceAware(true);
Document doc = null;
if(type==1){
doc = fac.newDocumentBuilder().parse(new File(XmlArgs.XML_BOOK));
DomOper.print(doc.getDocumentElement());
}else if(type==2){
doc = fac.newDocumentBuilder().parse(new File(XmlArgs.XML_STU));
DomOper.printN(doc.getDocumentElement());
}
}catch(Exception e){
e.printStackTrace();
}
}
public static void print(Node node) {
short type = node.getNodeType();
switch(type){
case Node.ELEMENT_NODE:
System.out.println("--------元素节点--------");
if(node.getNamespaceURI()!=null){
System.out.println("元素名称:"+ node.getNodeName());
System.out.println("本地名称:"+ node.getLocalName());
System.out.println("命名空间前缀:"+node.getPrefix());
System.out.println("命名空间URL:"+node.getNamespaceURI());
}
Node nd = null;
if(node.hasAttributes()){
NamedNodeMap attrs = node.getAttributes();
for(int i=0;i<attrs.getLength();i++){
nd = attrs.item(i);
if(nd.getNamespaceURI()!=null){
print(nd);
}
}
}
nd = node.getFirstChild();
while(nd!=null){
print(nd);
nd = nd.getNextSibling();
}
break;
case Node.ATTRIBUTE_NODE:
System.out.println("--------属性节点--------");
System.out.println("属性名称:"+ node.getNodeName());
System.out.println("本地名称:"+ node.getLocalName());
System.out.println("命名空间前缀:"+node.getPrefix());
System.out.println("命名空间URL:"+node.getNamespaceURI());
break;
default:break;
}
}
public static void printN(Node node) {
short nodeType = node.getNodeType();
switch(nodeType){
case Node.PROCESSING_INSTRUCTION_NODE:
System.out.println("
补充：Web开发 , 其他 ,
