一、建立DOM
XMLBuilder.java
用于建立ＤＯＭ，Root結點
package rochoc.xml.oper;
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.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
public class XmlBuilder
{
public XmlBuilder(String path)
{
this.path=path;
init();
}
public void init()
{
buildDocument();
buildRoot();
}
private void buildDocument()
{
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
try
{
DocumentBuilder builder=factory.newDocumentBuilder();
logger.debug("Construct document builder success.");
doc=builder.parse(new File(path));
logger.debug("Build xml document success.");
}catch(ParserConfigurationException e)
{
logger.error("Construct document builder error:"+e);
}catch(SAXException e)
{
logger.error("Parse xml file error:"+e);
}catch(IOException e)
{
logger.error("Read xml file error:"+e);
}
}
private void buildRoot()
{
root=doc.getDocumentElement();
}
public Document getDoc()
{
return doc;
}
public void setDoc(Document doc)
{
this.doc = doc;
}
public String getPath()
{
return path;
}
public void setPath(String path)
{
this.path = path;
}
public Element getRoot()
{
return root;
}
public void setRoot(Element root)
{
this.root = root;
}
private String path=null;//xml檔案路徑
private Document doc=null;//xml檔案對應的document
private Element root=null;//xml檔案的根結點
private Logger logger=Logger.getLogger(getClass().getName());
}
二、查找，插入，删除，修改
XmlOper.java
用于操作ＸＭＬ檔案，包括查找、新增、删除、修改結點
package rochoc.xml.oper;
import java.util.ArrayList;
import org.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class XmlOper
{
private XmlOper()
{
}
public static NodeList getNodeList(Element parent)
{
return parent.getChildNodes();
}
public static Element [] getElementsByName(Element parent,String name)
{
ArrayList resList=new ArrayList();
NodeList nl=getNodeList(parent);
for(int i=0;i
{
Node nd=nl.item(i);
if(nd.getNodeName().equals(name))
{
resList.add(nd);
}
}
Element [] res=new Element [resList.size()];
for(int i=0;i
{
res[0]=(Element)resList.get(i);
}
logger.debug(parent.getNodeName()+"'s children of "+name+
"'s num:"+res.length);
return res;
}
public static String getElementName(Element element)
{
return element.getNodeName();
}
public static String getElementValue(Element element)
{
NodeList nl=element.getChildNodes();
for(int i=0;i
{
if(nl.item(i).getNodeType()==Node.TEXT_NODE)//是一個Text Node
{
logger.debug(element.getNodeName()+" has a Text Node.");
return element.getFirstChild().getNodeValue();
}
}
logger.error(element.getNodeName()+" hasn't a Text Node.");
return null;
}
public static String getElementAttr(Element element,String attr)
{
return element.getAttribute(attr);
}
public static void setElementValue(Element element,String val)
{
Node node=element.getOwnerDocument().createTextNode(val);
NodeList nl=element.getChildNodes();
for(int i=0;i
{
Node nd=nl.item(i);
if(nd.getNodeType()==Node.TEXT_NODE)//是一個Text Node
{
nd.setNodeValue(val);
logger.debug("modify "+element.getNodeName()+"'s node value succe.");
return;
}
}
logger.debug("new "+element.getNodeName()+"'s node value succe.");
element.appendChild(node);
}
public static void setElementAttr(Element element,
String attr,String attrVal)
{
element.setAttribute(attr,attrVal);
}
public static void addElement(Element parent,Element child)
{
parent.appendChild(child);
}
public static void addElement(Element parent,String tagName)
{
Document doc=parent.getOwnerDocument();
Element child=doc.createElement(tagName);
parent.appendChild(child);
}
public static void addElement(Element parent,String tagName,String text)
{
Document doc=parent.getOwnerDocument();
Element child=doc.createElement(tagName);
setElementValue(child,text);
parent.appendChild(child);
}
public static void removeElement(Element parent,String tagName)
{
logger.debug("remove "+parent.getNodeName()+"'s children by tagName "+tagName+" begin...");
NodeList nl=parent.getChildNodes();
for(int i=0;i
{
Node nd=nl.item(i);
if(nd.getNodeName().equals(tagName))
{
parent.removeChild(nd);
logger.debug("remove child '"+nd+"' success.");
}
}
logger.debug("remove "+parent.getNodeName()+"'s children by tagName "+tagName+" end.");
}
static Logger logger=Logger.getLogger("XmlOper");
}
三、建立XML檔案
XmlCreater.java
用于建立ＸＭＬ檔案
package rochoc.xml.oper;
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class XmlCreater
{
public XmlCreater(String path)
{
this.path=path;
init();
}
private void init()
{
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
try
{
DocumentBuilder builder=factory.newDocumentBuilder();
doc=builder.newDocument();//建立DOM
}catch(ParserConfigurationException e)
{
logger.error("Parse DOM builder error:"+e);
}
}
public Element createRootElement(String rootTagName)
{
if(doc.getDocumentElement()==null)
{
logger.debug("create root element '"+rootTagName+"' success.");
Element root=doc.createElement(rootTagName);
doc.appendChild(root);
return root;
}
logger.warn("this dom's root element is exist,create fail.");
return doc.getDocumentElement();
}
public Element createElement(Element parent,String tagName)
{
Document doc=parent.getOwnerDocument();
Element child=doc.createElement(tagName);
parent.appendChild(child);
return child;
}
public Element createElement(Element parent,String tagName,String value)
{
Document doc=parent.getOwnerDocument();
Element child=doc.createElement(tagName);
XmlOper.setElementValue(child,value);
parent.appendChild(child);
return child;
}
public void createAttribute(Element parent,String attrName,String attrValue)
{
XmlOper.setElementAttr(parent,attrName,attrValue);
}
public void buildXmlFile()
{
TransformerFactory tfactory=TransformerFactory.newInstance();
try
{
Transformer transformer=tfactory.newTransformer();
DOMSource source=new DOMSource(doc);
logger.debug("New DOMSource success.");
StreamResult result=new StreamResult(new File(path));
logger.debug("New StreamResult success.");
transformer.setOutputProperty("encoding","GBK");
transformer.transform(source,result);
logger.debug("Build XML File '"+path+"' success.");
}catch(TransformerConfigurationException e)
{
logger.error("Create Transformer error:"+e);
}catch(TransformerException e)
{
logger.error("Transformer XML file error:"+e);
}
}
public Document getDoc()
{
return doc;
}
public void setDoc(Document doc)
{
this.doc = doc;
}
public String getPath()
{
return path;
}
public void setPath(String path)
{
this.path = path;
}
private Logger logger = Logger.getLogger(getClass().getName());
private Document doc=null;//新建立的DOM
private String path=null;//生成的XML檔案絕對路徑
}