利用java处理XML文档

来源：互联网发布：穿越知乎编辑：程序博客网时间：2024/06/14 19:18

在java对XML进行处理时，读取XML 文档，对其处理，这是我得一个实例代码。

import java.io.FileInputStream;

import javax.XML.parsers.*;

import org.w3c.dom.*;

/*
* Created on 2004-6-2
*
*java读取XML 文档
*利用DoM来读取一个XML 文档的内容，并将其打印出来
*
*/

/**
* @author wzy
*
* Email:wanderhouse@163.com
*/
public class TestXML {

public static void main(String[] args) {
  Document doc;
  DocumentBuilderFactory factory;
  DocumentBuilder docBuilder;

   Element root;
   String elementName;

  FileInputStream in;
  String fileName;
  try{

   //get the XML file
   fileName = System.getProperty("user.dir");
   fileName = fileName+"/sample.XML";
   in = new FileInputStream(fileName);

   //解析XML文件,生成document对象
   factory = DocumentBuilderFactory.newInstance();
   factory.setValidating(false);
   docBuilder = factory.newDocumentBuilder();
   doc = docBuilder.parse(in);
   //解析成功
   System.out.println("parse successfull");

   //获取XML 文档的根节点
   root = doc.getDocumentElement();
   elementName = root.getNodeName();
   //打印根节点的属性
   printAttributes(root);

   //打印该文档全部节点
   System.out.println("打印全部节点");
   printElement(root,0);

  }
  catch(Exception exp){
   exp.printStackTrace();
  }
}

//打印某个节点的全部属性
public static void printAttributes(Element elem){
  NamedNodeMap attributes;
  int i,max;
  String name,value;
  Node curNode;

  attributes = elem.getAttributes();
  max = attributes.getLength();

  for(i=0;i<max;i++){
   curNode = attributes.item(i);
   name = curNode.getNodeName();
   value = curNode.getNodeValue();
   System.out.println(""+name+" = "+value);
  }
}

//打印所有的节点的名称和值
//改方法采用递归方式打印文档的全部节点
public static void printElement(Element elem,int depth){
  String elementName;
  NodeList children;
  int i,max;
  Node curChild;
  Element curElement;
  String nodeName,nodeValue;

  //elementName = elem.getNodeName();
  //获取输入节点的全部子节点
  children = elem.getChildNodes();

  //按一定格式打印输入节点
  for(int j=0;j<depth;j++){
   System.out.print(" ");
  }
  printAttributes(elem);

  //采用递归方式打印全部子节点
  max = children.getLength();
  for(i=0;i<max;i++){

   curChild = children.item(i);

   //递归退出条件
   if(curChild instanceof Element){
    curElement = (Element)curChild;
    printElement(curElement,depth+1);
   }
   else{
    nodeName = curChild.getNodeName();
    nodeValue = curChild.getNodeValue();

    for(int j=0;j<depth;j++)System.out.print(" ");
    System.out.println(nodeName+" = "+nodeValue);
   }
  }
}
}