java对xml全面解析，增，删，改，以及将java对象重新编组为xml文件

写了一个jaxp用dom处理xml的代码，具体例外省略，自己看吧，希望对你有帮助。
如果这里的格式不习惯可以看我在csdn的博客
http://blog.csdn.net/xhinker/archive/2007/03/16/1531717.aspx
被解析的xml文件名为AnewXMLfile.xml
<?xml version="1.0"
encoding="UTF-8"?>

<!--

Document :
AnewXMLfile.xml

Created on :
2007年3月13日, 下午3:36

Author
: xhinker

-->

<customers>

<customer>

<id>001</id>

<name>xhinker</name>

<address>harbin</address>

</customer>

<customer>

<id>002</id>

<name>Car</name>

<address>Suzhou</address>

</customer>

<customer>

<id>003</id>

<name>Jimmy</name>

<address>ChengDu</address>

</customer>

<customer>

<id>004</id>

<name>Henry</name>

<address>Xi'an</address>

</customer>

</customers>
下面是用于解析这个xml文件的java代码，文件名为XMLfileReader.java
import javax.xml.parsers.*;

import org.w3c.dom.*;

import java.io.File;
import
javax.xml.transform.dom.DOMSource;

import org.xml.sax.*;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.*;

/**

* @author xhinker

*/

public class XMLfileReader {

/**

*解组xml,使之成为Document对象

*/

public
Document XMLParse(){

//建立解析器工厂

DocumentBuilderFactory
dbf=DocumentBuilderFactory.newInstance();

Document doc=null;

try {

DocumentBuilder db=dbf.newDocumentBuilder();

File file=new File("AnewXMLfile.xml");

doc=db.parse(file);//解析xml文件

} catch (Exception e) {}

return doc;

}

/**

*显示Docuument对象里的内容

*/

public void
XMLreader(Document
doc){

try {

System.out.println("haha");

NodeList nl=doc.getElementsByTagName("customer");

int len=nl.getLength();

for(int i=0;i<len;i++){

Element customer=(Element)nl.item(i);

Node id=customer.getElementsByTagName("id").item(0);

Node name=customer.getElementsByTagName("name").item(0);

Node
address=customer.getElementsByTagName("address").item(0);

String newid=id.getFirstChild().getNodeValue();

String newname=name.getFirstChild().getNodeValue();

String newAddress=address.getFirstChild().getNodeValue();

System.out.print("id\u53F7:");

System.out.println(newid);

System.out.print("\u540D\u5B57:");

System.out.println(newname);

System.out.print("\u5730\u5740");

System.out.println(newAddress);

}

} catch (Exception e) {}

}

/**

*为Document对象里添加内容

*@param doc Document类型对象

*/

public void
add(Document doc){

try {

Element customer=doc.createElement("customer");

Element id=doc.createElement("id");

Element name=doc.createElement("name");

Element address=doc.createElement("address");

Text textId=doc.createTextNode("005");

Text textName=doc.createTextNode("zhushudong");

Text textAddress=doc.createTextNode("haerbin");

id.appendChild(textId);

name.appendChild(textName);

address.appendChild(textAddress);

customer.appendChild(id);

customer.appendChild(name);

customer.appendChild(address);

Element root=doc.getDocumentElement();

root.appendChild(customer);

} catch (Exception e) {}

}

/**

*删除结点

*@param doc Document对象

*@param i 用于指示要删除结点位置

*/

public void
delete(Document doc,int i){

NodeList nl=doc.getElementsByTagName("customer");

Node nodeDel=nl.item(i);

nodeDel.getParentNode().removeChild(nodeDel);

}

/**

*改变节点的值

*@param doc 传入的对象

*@param i 用于指示要修改结点位置

*@param attr 要修改节点的标记

*@param newValue 修改后的值

*/

public void
change(Document doc,int i,String attr,String newValue){

NodeList nl=doc.getElementsByTagName("customer");

Element cha=(Element)nl.item(i);

Node nodeForCha=cha.getElementsByTagName(attr).item(0);

nodeForCha.getFirstChild().setNodeValue(newValue);

}

/**

*将java对象转化成xml文件

*@param doc 要转化的java对象

*/

public void
ObjectToXML(Document doc)throws
TransformerConfigurationException{

try {

//利用文档节点创建一个DOM输入源

DOMSource source=new DOMSource(doc);

//以newXMLfile.xml创建一个StreamResult对象

StreamResult result=new StreamResult(new
File("newXMLfile.xml"));

//创建转换器工厂对象

TransformerFactory tff=TransformerFactory.newInstance();

//创建转换器对象

Transformer tf=tff.newTransformer();

//进行转换

tf.transform(source, result);

} catch (Exception e) {}

}

public
static void main(String[]
args){

XMLfileReader xmlReader=new XMLfileReader();

Document newdoc=xmlReader.XMLParse();

System.out.println("-----display------");

xmlReader.XMLreader(newdoc);

xmlReader.add(newdoc);

System.out.println("-------add to last--------");

xmlReader.XMLreader(newdoc);

xmlReader.delete(newdoc, 0);

System.out.println("-----delete the first node-------");

xmlReader.XMLreader(newdoc);

xmlReader.change(newdoc,0,new String("name"),new
String("zhushudong2"));

System.out.println("-----change the first node-------");

xmlReader.XMLreader(newdoc);

try {

xmlReader.ObjectToXML(newdoc);

} catch (Exception e) {}

}

}