实习中遇到的第一个问题！ finally version

来源：互联网发布：矩阵测光特点编辑：程序博客网时间：2024/05/18 00:48

package com.hr;

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 Iterots {

/**
* @param args
*/
public static void main(String[] args) {
  // TODO Auto-generated method stub
  try{
   DocumentBuilderFactory factory =DocumentBuilderFactory.newInstance();
   DocumentBuilder db =factory.newDocumentBuilder();
   Document doc   =   db.parse(new File("MyXml.xml"));

   Element rootElement   = doc.getDocumentElement();
   System.err.println(doc.getDocumentURI());
   System.err.println(doc.getInputEncoding());
   System.err.println(doc.getXmlVersion());

         String rootName = rootElement.getNodeName();

         System.out.println("<"+rootName+">");
         Node rnode = rootElement.getChildNodes().item(1);

//         System.err.println(rnode.hashCode());
         NodeList list = rootElement.getElementsByTagName(rnode.getNodeName());
         System.err.println(rnode.getAttributes().getLength());

         print(list);

         System.out.println("</"+rootName+">");
  } catch (ParserConfigurationException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (SAXException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
}

static void print(NodeList list){
//  System.err.println(list.hashCode());
  for(int z=0;z<list.getLength();z++){
   Node node= list.item(z);

//   判断此节点是否子节点
   if(node.hasChildNodes()){
    String nodeName = node.getNodeName();

    String name = node.getNodeName();
    NamedNodeMap atn = node.getAttributes();

    System.out.print("<"+name);
//    判断此节点是否有属性
    if(node.hasAttributes()){

           for(int x=0;x<atn.getLength();x++){
             Node anode = atn.item(x);
             System.out.print(" "+anode.getNodeName()+"="+anode.getNodeValue());
           }
       }
    System.out.println(">");

    NodeList nl = node.getChildNodes();
    for(int i=0;i<nl.getLength();i++){
     Node na = nl.item(i);
     if(na.hasChildNodes()){
      NodeList l = na.getChildNodes();
      System.out.println("<"+na.getNodeName()+">");
      print(l);
      System.out.print(na.getFirstChild().getNodeValue());
      System.out.println("</"+na.getNodeName()+">");
     }
    }

    System.out.print(node.getFirstChild().getNodeValue());
    System.out.println("</"+nodeName+">");
   }
  }
}
}

xml文件如下：

<?xml version="1.0" encoding="gbk"?>
<students>
<student id="110" abc="cc">
  <name>李辉</name>
  <age>21</age>
  <sex>女</sex>
  <address>沈阳大东</address>
</student>
<student id="100">
  <name>zhangdan</name>
  <age>20</age>
  <sex>man</sex>
  <address>shen yan heping</address>
</student>
<student>
  <name>zhangdan</name>
  <age>23</age>
</student>
</students>
还有一种处理方式。下次接续......