Dom4J解析XML

说明：本文主要是用dom4j来解析一个相对复杂的xml，也是工作中用到的，在此留一个备份吧，附件中有相应的dom4j所需的Jar文件和事例源码。

 

【样式XML】

<gt:QueryCircleInput xmlns:gml="http://www.opengis.net/gml" xmlns:gt="http://www.sgcc.com.cn/sggis/service/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sgcc.com.cn/sggis/service/schema gistypes.xsd">      <gt:Token>1f69980f-92a0-4101-a7cb-452dd1cdd0cf</gt:Token>      <gml:CircleCenterPoint num="1">          <gml:pos>12345 54321</gml:pos>          <gml:radius uom="mt">0.2</gml:radius>      </gml:CircleCenterPoint>      <gt:PWhereArray>          <gt:Type>11111111111111</gt:Type>          <gt:WhereClause>Dydj='110'</gt:WhereClause>      </gt:PWhereArray>      <gt:PWhereArray>          <gt:Type>22222222222222</gt:Type>          <gt:WhereClause>Dydj='220'</gt:WhereClause>      </gt:PWhereArray>  </gt:QueryCircleInput>  

【解析源码】

package com.dyc.dom4j;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.util.Iterator;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;public class ParseXmlFromDom4J {/** * 来解析一个稍微复杂一点的 *  * @param args */public void parseXml(String objXml) {// 1、将传入的字符串流化InputStream in = null;try {in = new ByteArrayInputStream(objXml.getBytes("UTF-8"));SAXReader reader = new SAXReader();// 2、将流转成document对象Document document = reader.read(in);Element rootElement = document.getRootElement(); // 拿到根节点Element tokenNode = rootElement.element("Token");if (tokenNode == null) {System.out.println("Token节点获取为空");}System.out.println("Token--->" + tokenNode.getTextTrim());Element circleElement = rootElement.element("CircleCenterPoint");/* 3、解析出普通的属性 */if (null == circleElement) {System.out.println("circleElement节点获取为空");}System.out.println("numArc--->"+ circleElement.attributeValue("numArc"));Element posNode = circleElement.element("pos");if (null == posNode) {System.out.println("pos节点获取为空");}System.out.println("pos--->" + posNode.getTextTrim());Element radiusNode = circleElement.element("radius");if (null == radiusNode) {System.out.println("radius节点获取为空");}System.out.println("radius--->" + radiusNode.getTextTrim());// 4、解析多次重复的循环for (Iterator whereArray = rootElement.elementIterator(); whereArray.hasNext();) {Element whereArrayElement = (Element) whereArray.next();String nodeName = whereArrayElement.getName();if (!nodeName.equals("PWhereArray")) { // 如果这个节点不是PWhereArray就跳出。continue;}Element TypeNode = whereArrayElement.element("Type");Element WhereClauseNode = whereArrayElement.element("WhereClause");if (null == TypeNode) {System.out.println("Type节点获取为空");}System.out.println("Type--->"+ TypeNode.getTextTrim());if (null != WhereClauseNode) { // 因为此节点可以为空，所以取不为空的值System.out.println("WhereClause--->"+ WhereClauseNode.getTextTrim());}}} catch (UnsupportedEncodingException e) {System.out.println("流操作异常");e.printStackTrace();} catch (DocumentException e) {// TODO Auto-generated catch blockSystem.out.println("Document对象操作异常");e.printStackTrace();} finally {try {in.close();} catch (IOException e) {// TODO Auto-generated catch blockSystem.out.println("流关闭异常");e.printStackTrace();}}}public static void main(String[] args) {// TODO Auto-generated method stubString ss = "<gt:QueryCircleInput  xmlns:gml=\"http://www.opengis.net/gml\" xmlns:gt=\"http://www.sgcc.com.cn/sggis/service/schema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.sgcc.com.cn/sggis/service/schema gistypes.xsd\"><gt:Token>**********iorutoeutero***********</gt:Token><gt:CircleCenterPoint num=\"1\"><gml:pos>588123 3265375</gml:pos><gml:radius uom=\"m\">0.2</gml:radius></gt:CircleCenterPoint><gt:PWhereArray><gt:Type>04010300003</gt:Type><gt:WhereClause>Dydj='110'</gt:WhereClause></gt:PWhereArray><gt:PWhereArray><gt:Type>04010100001</gt:Type><gt:WhereClause>Dydj='220'</gt:WhereClause></gt:PWhereArray></gt:QueryCircleInput >";ParseXmlFromDom4J pfd = new ParseXmlFromDom4J();pfd.parseXml(ss);}}