JDOM解析处理xml
1.解析xml
package com.qingbyqing.xmlParse;import java.io.IOException;import java.util.List;import org.jdom.Attribute;import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;/** * 解析xml * @author qingbyqing * @date 2011-3-29 */public class XmlPasreUtil {Element root=null;Document doc=null;/** * 获得根元素 * @param fileName 用于指定的xml文件名 * @return */public Element getRoot(String fileName){//1.创建解析对象//2.解析对象调用build方法建立文档对象//3.文档对象获得根元素SAXBuilder builder = new SAXBuilder(false);try { doc = builder.build(fileName);} catch (JDOMException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} Element root = doc.getRootElement();return root;}/** * 获取xml的所有信息 * @param root 传入一个根元素对象 */public void getElementInfo(Element root){//遍历跟元素List<?> flist = root.getChildren("floor"); for(int i=0;i<flist.size();i++){ Element floor =(Element) flist.get(i); String level = floor.getAttributeValue("level"); p("第"+level+"层"); List<?> rlist = floor.getChildren("room"); for(int j=0;j<rlist.size();j++){ Element room = (Element)rlist.get(j); String id=room.getAttributeValue("id"); String rep=room.getChild("represent").getText(); String tel=room.getChild("telephone").getText(); p("寝室编号："+id+" 负责人："+rep+" 寝室号码："+tel); } }}/** * @param args */public static void main(String[] args) { XmlPasreUtil pasre = new XmlPasreUtil(); Element root=pasre.getRoot("I:\\xml\\flats.xml"); pasre.getElementInfo(root);}public void p(String str){System.out.println(str);}}
package com.qingbyqing.xmlParse;import java.io.FileWriter;import java.io.IOException;import org.jdom.Attribute;import org.jdom.Comment;import org.jdom.Document;import org.jdom.Element;import org.jdom.output.Format;import org.jdom.output.XMLOutputter;/** * 创建一个xml * @author qingbyqing * @date 2011-3-29 */public class XmlCreateUtil { Element root=null;//跟元素Document doc=null;//文档对象 /** * 创建xml * @param ajax */public void createRootElement(String[] ajaxs){//1.根据数组创建跟元素//2.建立解释内容//3.建立子元素 root = new Element("ajax"); //建立解释内容 Comment comment = new Comment("简单的xml示例"); root.addContent(comment); //建立子元素 for(int i=0;i<ajaxs.length;i++){ Element ajax = new Element("ajax");//子元素标签 ajax.addContent(ajaxs[i]);//子元素内容 Attribute id = new Attribute("id",new Integer(i).toString());//子元素属性 ajax.setAttribute(id); root.addContent(ajax); }}public void outputXml(String fileName){ //1.根据跟元素创建文档//2.创建输出对象//3.创建输出格式对象//4.格式化文档//5.创建文件输出对象//6.输出对象doc =new Document(root);XMLOutputter out = new XMLOutputter();Format format = Format.getPrettyFormat();//设置输出格式format.setIndent(" ");format.setEncoding("gbk");out.setFormat(format);try {FileWriter fwt = new FileWriter(fileName);out.output(doc, fwt);fwt.flush();fwt.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void main(String args[]){String[] ajaxs={"JAVASCRIPT","HTML","CSS","DOM","XMLHTTPREQUEST"}; XmlCreateUtil cu = new XmlCreateUtil(); cu.createRootElement(ajaxs); cu.outputXml("I:\\xml\\ajaxs.xml");}}[img]
package com.qingbyqing.xmlParse;import java.io.FileWriter;import java.io.IOException;import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;import org.jdom.output.Format;import org.jdom.output.XMLOutputter;/** * 对xml进行修改删除 * @author qingbyqing * @date 2011-3-29 */public class XmlMendUtil {private Document doc=null;//根据需要修改的文件创建文档public void setRootNode(String fileName){SAXBuilder builder = new SAXBuilder();try {doc=builder.build(fileName);} catch (JDOMException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}public void mendXml(){if(doc!=null){Element root = doc.getRootElement();root.removeContent(root.getChildren().size()-1);//删除最后一个元素//删除第一个元素下的id属性root.getChild("ajax").setAttribute("id", "3");root.getChild("ajax").removeContent();//修改第二个元素的内容为：DHTMLroot.getChild("ajax").addContent("DTML");}return;}public void outputXML(String fileName){ XMLOutputter out=new XMLOutputter(); Format format = Format.getPrettyFormat(); format.setEncoding("UTF-8"); format.setIndent(" "); out.setFormat(format); try {FileWriter fwt = new FileWriter(fileName);out.output(doc, fwt);fwt.flush();fwt.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * @param args */public static void main(String[] args) {XmlMendUtil mend=new XmlMendUtil();mend.setRootNode("I:\\xml\\ajaxs.xml"); mend.mendXml(); mend.outputXML("I:\\xml\\mended.xml");}}
