JAVA读取xml文件
http://blog.csdn.net/k1113k/article/details/1495807
Node.getChildNodes()方法是获得所有子节点,你要判断子节点的类型是element还是其他类型,然后再继续往深层找.感觉挺麻烦.
例子1:
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Java代码 package com; import org.w3c.dom.*; import javax.xml.parsers.*; import java.io.*; public class Parse{ //Document可以看作是XML在内存中的一个镜像,那么一旦获取这个Document 就意味着可以通过对 //内存的操作来实现对XML的操作,首先第一步获取XML相关的Document private Document doc=null; public void init(String xmlFile) throws Exception{ //很明显该类是一个单例,先获取产生DocumentBuilder工厂 //的工厂,在通过这个工厂产生一个DocumentBuilder, //DocumentBuilder就是用来产生Document的 DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance(); DocumentBuilder db=dbf.newDocumentBuilder(); //这个Document就是一个XML文件在内存中的镜像 doc=db.parse(new File(xmlFile)); } //该方法负责把XML文件的内容显示出来 public void viewXML(String xmlFile) throws Exception{ this.init(xmlFile); //在xml文件里,只有一个根元素,先把根元素拿出来看看 Element element=doc.getDocumentElement(); System.out.println("根元素为:"+element.getTagName()); NodeList nodeList=doc.getElementsByTagName("dbstore"); System.out.println("dbstore节点链的长度:"+nodeList.getLength()); Node fatherNode=nodeList.item(0); System.out.println("父节点为:"+fatherNode.getNodeName()); //把父节点的属性拿出来 NamedNodeMap attributes=fatherNode.getAttributes(); for(int i=0;i<attributes.getLength();i++){ Node attribute=attributes.item(i); System.out.println("dbstore的属性名为:"+attribute.getNodeName()+" 相对应的属性值为:"+attribute.getNodeValue()); } NodeList childNodes = fatherNode.getChildNodes(); System.out.println(childNodes.getLength()); for(int j=0;j<childNodes.getLength();j++){ Node childNode=childNodes.item(j); //如果这个节点属于Element ,再进行取值 if(childNode instanceof Element){ //System.out.println("子节点名为:"+childNode.getNodeName()+"相对应的值为"+childNode.getFirstChild().getNodeValue()); System.out.println("子节点名为:"+childNode.getNodeName()+"相对应的值为"+childNode.getFirstChild().getNodeValue()); } } } public static void main(String[] args)throws Exception{ Parse parse=new Parse(); //我的XML文件 parse.viewXML("netct.xml"); } } |
例子2:
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Java代码 public static List<TableConfig> getTableConfigs(){ DocumentBuilderFactory factory = null; DocumentBuilder db = null; Document doc = null; List<TableConfig> tableConfigList = new ArrayList<TableConfig>(); try { factory = DocumentBuilderFactory.newInstance(); db = factory.newDocumentBuilder(); doc = db.parse(new File(xmlFilePath)); Element root = doc.getDocumentElement(); System.out.println(root.getTagName()); NodeList tableNodeList = doc.getElementsByTagName("table"); System.out.println(tableNodeList.getLength()); for(int i=0; i<tableNodeList.getLength(); i++){ System.out.println(tableNodeList.item(i).getNodeName()); NodeList tableList = tableNodeList.item(i).getChildNodes(); System.out.println(tableList.getLength()); TableConfig tc = new TableConfig(); for(int j=0; j<tableList.getLength(); j++){ if(tableList.item(j) instanceof Element){ String nodeName = tableList.item(j).getNodeName(); String nodeText = tableList.item(j).getChildNodes().item(0)!=null?tableList.item(j).getChildNodes().item(0).getTextContent():null; System.out.println(nodeName+":"+nodeText); if("tableName".equalsIgnoreCase(nodeName)) tc.setTableName(nodeText); if("primaryKey".equalsIgnoreCase(nodeName)) tc.setPrimaryKey(nodeText); if("excludeCols".equalsIgnoreCase(nodeName)) tc.setExcludeCols(nodeText); if("parsentColumns".equalsIgnoreCase(nodeName)) tc.setParsentColumns(nodeText); if("isInsertOnly".equalsIgnoreCase(nodeName)) tc.setIsInsertOnly(nodeText); if("includeIDS".equalsIgnoreCase(nodeName)) tc.setIncludeIDS(nodeText); if("excludeIDS".equalsIgnoreCase(nodeName)) tc.setExcludeIDS(nodeText); } } tableConfigList.add(tc); } } catch (Exception e) { e.printStackTrace(); } return null; } |
