package csm.doxml;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.*;

import java.util.ArrayList;

/*读取xml文件并返回根结点，第一个子结点名字，第一个子结点的属性列*

*

**/

public class ReadXmlF{

public Element root=null;/*根结点*/

public String type=null;/*第一个结点类型名字*/

public ArrayList subNodeList=new ArrayList();/*子结点类型名字*/

String filename="product.xml";

ArrayList LevelOne=new ArrayList();

public ReadXmlF(){}

public ReadXmlF(String filenames){

filename=filenames;

}

protected int readXML()throws Exception{

/*创建文档实例*/

DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();

DocumentBuilder db=null;

NodeList children=null;/*子结点的子结点*/

try{

db=dbf.newDocumentBuilder();

}catch(ParserConfigurationException e1){

printf(":"+e1.getMessage());

return -1;

}

Document doc=null;

try{

doc=db.parse(filename);

}

catch(DOMException e2){

printf(":"+e2.getMessage());

return -2;

}

catch(Exception e3){

printf(e3.getMessage());

return -3;

}

/*开始取根*/

root=doc.getDocumentElement();

/*取第一个子结点类型*/

if(root!=null)

{

children=root.getChildNodes();

int len=children.getLength();

printf("root.length=:"+String.valueOf(len));

if(children.getLength()>0)//nodelist下标从1开始

for(int k=0;(2*k+1){

type=String.valueOf(children.item(2*k+1).getNodeName());

LevelOne.add(type);

}

}

/*再取第二层结点的子结点*/

Node peak = children.item(1);

for (int j=1; j {

String typename=String.valueOf(peak.getChildNodes().item(j++).getNodeName());

subNodeList.add(typename);

/**/printf("ch3:"+typename);

}

return 1;

}

/*返回第一层子结点名字*/

public ArrayList getFirstType(){

if(LevelOne.size()>0) return LevelOne;

else return null;

}

/*返回第一层个子结点名字*/

protected ArrayList getSubNode(){

if(subNodeList.size()>0)return subNodeList;

return null;

}

/*返回根结点*/

protected Element getRoot(){

if(root!=null)return root;

return null;

}

private void printf(String content){

System.out.println(content);

}

public static void main(String[] args){

ReadXmlF rf=new ReadXmlF("test2.xml");

Element ro=null;

try{int flags=rf.readXML();

ArrayList a=rf.getFirstType();

System.out.println("s1="+a.size());

//for(int i=0;i// System.out.println("s1="+String.valueOf(a.get(i)));

//ro=rf.getRoot();

}catch(Exception e){}

if(ro==null)

System.out.println("ro is null");

else

System.out.println("ro is not null");

}

}

101

Kiran

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22

12300

102

Bill

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22

12300

103

Steve

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6300