dom4j操作工具类

编程技术  /  houtizong 发布于 3年前   67

import java.io.File;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.StringReader;import java.util.List;import org.dom4j.Attribute;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.Node;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;public class FlowConfigHandle {String path = ""; //$NON-NLS-1$File file;SAXReader saxReader = new SAXReader();Document document = null;org.dom4j.io.OutputFormat format = new org.dom4j.io.OutputFormat().createPrettyPrint();public FlowConfigHandle(Document document) {this.document = document;path = document.getPath();}public FlowConfigHandle(String path) {try {// saxReader.setEncoding("UTF-8");this.path = path;file = new File(path);document = saxReader.read(file);} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * @param key * @param isAttribute * @return */public String get(String key, Boolean isAttribute) {try {List list = document.selectNodes(key);if (list != null && list.size() > 0) {if (isAttribute) {return ((Attribute) list.iterator().next()).getText();} else {return ((Element) list.iterator().next()).getText();}}} catch (Exception e) {e.printStackTrace();}return ""; //$NON-NLS-1$}public List getList(String key, Boolean isAttribute) {try {if (!isAttribute) {List list = document.selectNodes(key);return list;} else {return null;}} catch (Exception e) {e.printStackTrace();}return null;}/** * @param key * @param value * @throws IOException */public void set(String key, String value, Boolean isAttribute) {try {if (isAttribute) {List list = document.selectNodes(key);((Attribute) list.iterator().next()).setValue(value);} else {List list = document.selectNodes(key);((Element) list.iterator().next()).setText(value);}} catch (Exception e) {e.printStackTrace();}}/** * @param key * @param value * @throws IOException */public void delete(String key, String value, Boolean isAttribute) {try {List list = document.selectNodes(key);Element element = (Element) list.iterator().next();if (isAttribute) {List attributeList = document.selectNodes(key + "/@" + value); //$NON-NLS-1$Attribute attribute = (Attribute) attributeList.iterator().next();element.remove(attribute);} else {List childList = document.selectNodes(key + "/" + value); //$NON-NLS-1$Element childElement = (Element) childList.iterator().next();element.remove(childElement);}} catch (Exception e) {e.printStackTrace();}}/** * @param key * @param stringArray * @param isAttribute * @throws IOException */public Element insert(String key, String[] stringArray, Boolean isAttribute) {Element element = null;try {List list = document.selectNodes(key);element = (Element) list.iterator().next();if (isAttribute) {element = element.addAttribute(stringArray[0], stringArray[1]);} else {element = element.addElement(stringArray[0]);element.setText(stringArray[1]);}} catch (Exception e) {e.printStackTrace();}return element;}/** *  * @param document * @throws IOException */public void save(Document document) throws IOException {try {format.setEncoding("utf-8"); //$NON-NLS-1$XMLWriter writer = new XMLWriter(new FileWriter(new File(path)),format);writer.write(document);writer.close();} catch (Exception e) {e.getStackTrace();}}// public void doSave() throws IOException{// try{// document = saxReader.read(file);// java.io.Writer wr=new java.io.OutputStreamWriter(new// java.io.FileOutputStream(file),"UTF-8");// document.write(wr);// }catch (Exception e){// e.getStackTrace();// }// // }public void doSave(){writeXML(path, document, "UTF-8"); //$NON-NLS-1$// try {// format.setEncoding("utf-8");// document.setXMLEncoding("UTF-8");// OutputStreamWriter osw = new OutputStreamWriter(new// FileOutputStream(file),"UTF-8");// XMLWriter writer = new XMLWriter(osw, format);// writer.write(document);// writer.close();// } catch (Exception e) {// e.getStackTrace();// }}/** * @param document * @return */public Element getRootElement(Document document) {return document.getRootElement();}public void treeWalk(Element element) {for (int i = 0, size = element.nodeCount(); i < size; i++) {Node node = element.node(i);if (node instanceof Element) {treeWalk((Element) node);} else { // do something....}}}public String getStringFromDocument() {String text = document.asXML();return text;}public Document getDocument() {return document;}public void setDocument(Document document) {this.document = document;}public void writeXML(String file, Document document, String encoding) {try {document.setXMLEncoding("UTF-8"); //$NON-NLS-1$OutputStreamWriter outWriter = new OutputStreamWriter(new FileOutputStream(file), "UTF-8"); //$NON-NLS-1$OutputFormat format = OutputFormat.createPrettyPrint();format.setEncoding(encoding == null ? format.getEncoding(): encoding);XMLWriter writer = new XMLWriter(outWriter, format);writer.write(document);writer.close();} catch (IOException ex) {ex.printStackTrace();}}public void setDocument(String xml) {try {StringReader in  = new StringReader(xml);document = saxReader.read(in);//System.out.println(document.asXML());} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

网上一些例子

一.Document对象相关1.读取XML文件,获得document对象.            SAXReader reader = new SAXReader();            Document  document = reader.read(new File("input.xml"));2.解析XML形式的文本,得到document对象.            String text = "<members></members>";            Document document = DocumentHelper.parseText(text);3.主动创建document对象.            Document document = DocumentHelper.createDocument();            Element root = document.addElement("members");// 创建根节点二.节点相关1.获取文档的根节点.Element rootElm = document.getRootElement();2.取得某节点的单个子节点.Element memberElm=root.element("member");// "member"是节点名3.取得节点的文字String text=memberElm.getText();也可以用:String text=root.elementText("name");这个是取得根节点下的name字节点的文字.4.取得某节点下名为"member"的所有字节点并进行遍历.List nodes = rootElm.elements("member");for (Iterator it = nodes.iterator(); it.hasNext();) {   Element elm = (Element) it.next();   // do something}5.对某节点下的所有子节点进行遍历.            for(Iterator it=root.elementIterator();it.hasNext();){                Element element = (Element) it.next();                // do something            }6.在某节点下添加子节点.Element ageElm = newMemberElm.addElement("age");7.设置节点文字.ageElm.setText("29");8.删除某节点.parentElm.remove(childElm);// childElm是待删除的节点,parentElm是其父节点三.属性相关.1.取得某节点下的某属性            Element root=document.getRootElement();                Attribute attribute=root.attribute("size");// 属性名name2.取得属性的文字            String text=attribute.getText();也可以用:String text2=root.element("name").attributeValue("firstname");这个是取得根节点下name字节点的属性firstname的值.3.遍历某节点的所有属性            Element root=document.getRootElement();                for(Iterator it=root.attributeIterator();it.hasNext();){                Attribute attribute = (Attribute) it.next();                String text=attribute.getText();                System.out.println(text);            }4.设置某节点的属性和文字.newMemberElm.addAttribute("name", "sitinspring");5.设置属性的文字            Attribute attribute=root.attribute("name");            attribute.setText("sitinspring");6.删除某属性            Attribute attribute=root.attribute("size");// 属性名name            root.remove(attribute);四.将文档写入XML文件.1.文档中全为英文,不设置编码,直接写入的形式.XMLWriter writer = new XMLWriter(new FileWriter("output.xml"));writer.write(document);writer.close();2.文档中含有中文,设置编码格式写入的形式.            OutputFormat format = OutputFormat.createPrettyPrint();            format.setEncoding("GBK");    // 指定XML编码                    XMLWriter writer = new XMLWriter(new FileWriter("output.xml"),format);                        writer.write(document);            writer.close();五.字符串与XML的转换1.将字符串转化为XMLString text = "<members> <member>sitinspring</member> </members>";Document document = DocumentHelper.parseText(text);2.将文档或节点的XML转化为字符串.            SAXReader reader = new SAXReader();            Document  document = reader.read(new File("input.xml"));                        Element root=document.getRootElement();                            String docXmlText=document.asXML();            String rootXmlText=root.asXML();            Element memberElm=root.element("member");            String memberXmlText=memberElm.asXML();六.使用XPath快速找到节点.读取的XML文档示例<?xml version="1.0" encoding="UTF-8"?><projectDescription>  <name>MemberManagement</name>  <comment></comment>  <projects>    <project>PRJ1</project>    <project>PRJ2</project>    <project>PRJ3</project>    <project>PRJ4</project>  </projects>  <buildSpec>    <buildCommand>      <name>org.eclipse.jdt.core.javabuilder</name>      <arguments>      </arguments>    </buildCommand>  </buildSpec>  <natures>    <nature>org.eclipse.jdt.core.javanature</nature>  </natures></projectDescription>使用XPath快速找到节点project. public static void main(String[] args){    SAXReader reader = new SAXReader();        try{      Document  doc = reader.read(new File("sample.xml"));            List projects=doc.selectNodes("/projectDescription/projects/project");            Iterator it=projects.iterator();            while(it.hasNext()){        Element elm=(Element)it.next();               System.out.println(elm.getText());      }          }    catch(Exception ex){       ex.printStackTrace();    }  }