一直用的dom4j解析,最近碰到工程里面是这种解析方式。
先记录下网上百度的一段代码。
写道
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.parsers.*;
import org.w3c.dom.*;
public class edit
{
public static void main(String[] args)
{
try{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc=builder.parse("links.xml");
doc.normalize();
NodeList books =doc.getDocumentElement().getChildNodes();
Node book;
NodeList lists;
book=books.item(1);
//添加节点
Element id=doc.createElement("id");
id.appendChild(doc.createTextNode("first"));
book.appendChild(id);
//删除节点
book.removeChild(book.getChildNodes().item(1));
//修改节点
Text sina=doc.createTextNode("sina");
book.getChildNodes().item(2).replaceChild(sina,book.getChildNodes().item(2).getFirstChild());
System.out.println(book.getChildNodes().item(2).getNodeName());
System.out.println(books.getLength());
System.out.println(book.getChildNodes().getLength());
//浏览查看
for(int i=1;i{
book=books.item(i);
lists=book.getChildNodes();
for(int j=1;j{
if(lists.item(j).getNodeType()==Node.ELEMENT_NODE)
System.out.println(lists.item(j).getFirstChild().getNodeValue());
}
}
TransformerFactory tFactory =TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new java.io.File("links.xml"));
transformer.transform(source, result);
}catch(Exception e){System.out.println(e);}
}
}
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.parsers.*;
import org.w3c.dom.*;
public class edit
{
public static void main(String[] args)
{
try{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc=builder.parse("links.xml");
doc.normalize();
NodeList books =doc.getDocumentElement().getChildNodes();
Node book;
NodeList lists;
book=books.item(1);
//添加节点
Element id=doc.createElement("id");
id.appendChild(doc.createTextNode("first"));
book.appendChild(id);
//删除节点
book.removeChild(book.getChildNodes().item(1));
//修改节点
Text sina=doc.createTextNode("sina");
book.getChildNodes().item(2).replaceChild(sina,book.getChildNodes().item(2).getFirstChild());
System.out.println(book.getChildNodes().item(2).getNodeName());
System.out.println(books.getLength());
System.out.println(book.getChildNodes().getLength());
//浏览查看
for(int i=1;i
book=books.item(i);
lists=book.getChildNodes();
for(int j=1;j
if(lists.item(j).getNodeType()==Node.ELEMENT_NODE)
System.out.println(lists.item(j).getFirstChild().getNodeValue());
}
}
TransformerFactory tFactory =TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new java.io.File("links.xml"));
transformer.transform(source, result);
}catch(Exception e){System.out.println(e);}
}
}
-----------------------------------------------------------------------------------------------------
有如下的xml文档
遍历整个xml的所有node
XML文档时,解析器会得到5个结果:
写道
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class XMLReader {
public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException
{
File file = new File("test.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
//将xml文件解释成文档对象
Document doc = db.parse(file);
//取得文档根
doc.normalize();
Element root = doc.getDocumentElement();
//取得要元素名
System.out.println("The root element is:" + root.getNodeName());
//获取孩子节点
NodeList children = root.getChildNodes();
stepThrough(root);
}
private static void stepThrough (Node start)
{
for(Node child = start.getFirstChild();child != null;child = child.getNextSibling())
{
if(child instanceof Element)//去除多余的空白
{
System.out.print("节点名:"+child.getNodeName());
System.out.println("\t节点值:"+ child.getNodeValue());
}
if(child != null)
stepThrough(child);
}
}
}
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class XMLReader {
public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException
{
File file = new File("test.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
//将xml文件解释成文档对象
Document doc = db.parse(file);
//取得文档根
doc.normalize();
Element root = doc.getDocumentElement();
//取得要元素名
System.out.println("The root element is:" + root.getNodeName());
//获取孩子节点
NodeList children = root.getChildNodes();
stepThrough(root);
}
private static void stepThrough (Node start)
{
for(Node child = start.getFirstChild();child != null;child = child.getNextSibling())
{
if(child instanceof Element)//去除多余的空白
{
System.out.print("节点名:"+child.getNodeName());
System.out.println("\t节点值:"+ child.getNodeValue());
}
if(child != null)
stepThrough(child);
}
}
}
在处理这个
与
Name元素
与
Size元素
与之间的空白区域
如果只希望得到子元素,那么你可以忽略空白字符:
xml文档节点
写道
for(int i = 0;i < children.getLength(); i++)
{
Node child = children.item(i);
if (child instanceof Element)
{
Element childElement = (Element)child;
......
}
}
{
Node child = children.item(i);
if (child instanceof Element)
{
Element childElement = (Element)child;
......
}
}
遍历整个
for(Node childNode = element.getFirstChild();childNode != null;childNode = childNode.getNextSibling())
{
......
}
遍历整个xml某节点的所有属性
写道
NameNodeMap attributes = element.getAttributes();
for (int i = 0;i
{
Node attribute = attributes.item(i);
String name = attribute.getNodeName();//获得属性名
String value = attribute.getNodeValue();//获得属性值
}
for (int i = 0;i
{
Node attribute = attributes.item(i);
String name = attribute.getNodeName();//获得属性名
String value = attribute.getNodeValue();//获得属性值
}
如果只想知道己知属性的值,只需用
String unit = element.getAttribute(“unit”);