Dom4J操作XML

package xml;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.Attribute;import java.util.List;import java.util.Iterator;import org.dom4j.io.OutputFormat;import org.dom4j.io.XMLWriter;import java.io.*;import org.dom4j.DocumentException;import org.dom4j.io.SAXReader;import org.dom4j.DocumentHelper;public class XmlDom4J{/** * 生成xml文件； * */public void createXMLFile(){// 使用 DocumentHelper 类创建一个文档实例。 DocumentHelper 是生成 XML 文档节点的 dom4j API// 工厂类。Document document = DocumentHelper.createDocument();// 使用 addElement() 方法创建根元素 catalog 。addElement() 用于向 XML 文档中增加元素。Element catalogElement = document.addElement("catalog");// 在 catalog 元素中使用 addComment() 方法添加注释“An XML catalog”。catalogElement.addComment("An XML Catalog");// 在 catalog 元素中使用 addProcessingInstruction() 方法增加一个处理指令。catalogElement.addProcessingInstruction("target", "text");// 在 catalog 元素中使用 addElement() 方法增加 journal 元素。Element journal = catalogElement.addElement("journal");// 使用 addAttribute() 方法向 journal 元素添加 title 和 publisher 属性。journal.addAttribute("title", "XML Zone");journal.addAttribute("publisher", "IBM Devoloperment");// 添加节点journal的子节点article,并设置其属性；Element articleElement = journal.addElement("article");articleElement.addAttribute("level", "Intermediate");articleElement.addAttribute("date", "December-2008");// 添加节点articleElement的子结点title,并使用 setText() 方法设置其元素的文本。Element titleElement = articleElement.addElement("title");titleElement.setText("又是下雨天");// 添加节点articleElement的子结点author.添加子结点的子结点firstname、lastname,并设置其文件；Element authorElement = articleElement.addElement("author");Element firstNameElement = authorElement.addElement("firstname");firstNameElement.setText("Marcello");Element lastNameElement = authorElement.addElement("lastname");lastNameElement.setText("Vitaletti");// 可以使用 addDocType() 方法添加文档类型说明。XMLWriter output;try{OutputFormat format = OutputFormat.createPrettyPrint();format.setEncoding("UTF-8");output = new XMLWriter(new FileWriter(new File("catalog.xml")),format);output.write(document);output.close();} catch (IOException e){e.printStackTrace();}}/** * 修改xml文件指定节点的属性； * * @param inputXml * xml文件流 * @oldAttributeValue 原属性； * @attributeValue 要修改成的值； * @param XPath * 要修改节点属性的表达式；如："//article/@level" 则表示修改节点level(父节点为article)的属性 * 特别说明:@后面表示的是属性; */public Document modifyXMLNodeAttributeByName(File inputXml, String XPath,String oldAttributeValue, String attributeValue){if (XPath.indexOf("@") < 0){System.out.println("参数XPath无效,请在要修改的属性前加入'@'");return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputXml);List list = document.selectNodes(XPath);Iterator iter = list.iterator();while (iter.hasNext()){Attribute attribute = (Attribute) iter.next();if (attribute.getValue().equals(oldAttributeValue))// 把原属性修改为新的属性；attribute.setValue(attributeValue);}} catch (DocumentException e){e.printStackTrace();}return document;}/** * 修改指定节点的属性值； * * @param inputXml * xml文件流 * @param XPath * 要修改节点属性的表达式；如："//article/@level" 则表示修改节点level(父节点为article)的属性 * @param attributeValue * 属性新值； */public Document modifyXMLNodeAttributeByName(File inputXml, String XPath,String attributeValue){if (XPath.indexOf("@") < 0){System.out.println("参数XPath无效,请在要修改的属性前加入'@'");return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputXml);List list = document.selectNodes(XPath);Iterator iter = list.iterator();while (iter.hasNext()){Attribute attribute = (Attribute) iter.next();// 把原属性修改为新的属性；attribute.setValue(attributeValue);}} catch (DocumentException e){e.printStackTrace();}return document;}/** * 获取某一节点的属性值； * * @param inputxml * xml文件； * @param XPath * @return */public String[] getNodeAttributeValue(File inputxml, String XPath){String nodeAttri = "";// 储存节点属性值;if (XPath.indexOf("@") < 0){return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputxml);List list = document.selectNodes(XPath);Iterator it = list.iterator();while (it.hasNext()){Attribute attri = (Attribute) it.next();nodeAttri += attri.getValue() + ",";}} catch (Exception e){e.printStackTrace();}if (nodeAttri.length() > 0){nodeAttri = nodeAttri.substring(0, nodeAttri.length() - 1);}return nodeAttri.split(",");}/** * 修改指定节点的文本值； * * @param inputXml * @param XPath * 要修改节点属性的表达式；如："//article/@level" 则表示article节点下的所有level节点的文本； * @param newText * 新的文本值； */public Document modifyXMLNodeTextByName(File inputXml, String XPath,String newText){if (XPath.indexOf("@") >= 0){System.out.println("参数XPath无效!");return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputXml);List list = document.selectNodes(XPath);Iterator iter = list.iterator();while (iter.hasNext()){Element elementText = (Element) iter.next();elementText.setText(newText);}} catch (DocumentException e){e.printStackTrace();}return document;}/** * 替换指定节点文本的值。 * * @param inputXml * xml文件流 * @param XPath * 要修改节点属性的表达式；如："//article/level" 则表示article节点下的所有level节点的文本； * @param oldText * 原文本 * @param newText * 新文本； */public Document modifyXMLNodeTextByName(File inputXml, String XPath,String oldText, String newText){if (XPath.indexOf("@") >= 0){System.out.println("参数XPath无效!");return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputXml);List list = document.selectNodes(XPath);Iterator iter = list.iterator();while (iter.hasNext()){Element elementText = (Element) iter.next();if (elementText.getText().equals(oldText))elementText.setText(newText);}} catch (DocumentException e){e.printStackTrace();}return document;}/** * 获取某一节点的文本内容； * * @param inputxml * xml文件； * @param XPath * @return */public String[] getNodeTextValue(File inputxml, String XPath){String nodeTextValue = "";// 储存节点属性值;if (XPath.indexOf("@") >= 0){return null;}SAXReader saxReader = new SAXReader();Document document = null;try{document = saxReader.read(inputxml);List list = document.selectNodes(XPath);Iterator it = list.iterator();while (it.hasNext()){Element text = (Element) it.next();if(text.getText().trim() != null && !(text.getText().trim().equals("")))nodeTextValue += text.getText() + ",";}} catch (Exception e){e.printStackTrace();}if (nodeTextValue.length() > 0){nodeTextValue = nodeTextValue.substring(0,nodeTextValue.length() - 1);}if(nodeTextValue!=null && !nodeTextValue.equals(""))return nodeTextValue.split(",");elsereturn null;}/** * 保存xml文件; * * @param document * xml文件流; * @param filePath * 文件存储的全路径(包括文件名) * @code 储存的编码; */public void saveXmlFile(Document document, String filePath, String code){if (document == null){return;}XMLWriter output;try{OutputFormat format = OutputFormat.createPrettyPrint();format.setEncoding(code);output = new XMLWriter(new FileWriter(new File(filePath)), format);output.write(document);output.close();} catch (IOException e){e.printStackTrace();}}// 测试；public static void main(String[] args){XmlDom4J dom4jParser = new XmlDom4J();// 生成XML// dom4jParser.createXMLFile();File file = new File("catalog.xml");//dom4jParser.createXMLFile();// dom4jParser.saveXmlFile(document, "F://test.xml", "GBK");/* * String[] attrArray=dom4jParser.getNodeAttributeValue(file, * "//article/@level"); if(attrArray!=null){ for(int * i=0;i<attrArray.length;i++){ * System.out.println("Attribute is :"+attrArray[i]); } } */Long time = System.currentTimeMillis();String[] nodeText = dom4jParser.getNodeTextValue(file,"//article/author");System.out.println(System.currentTimeMillis()-time);if (nodeText != null){for (int i = 0; i < nodeText.length; i++){System.out.println("NODE TEXT IS:" + nodeText[i]);}}else{System.out.println("The node can't find!");}}}