随笔用dom4j建立,修改XML文档,
package com.rbt.action;import java.io.File;import java.io.FileWriter;import java.io.PrintWriter;import java.util.Iterator;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import org.apache.struts2.ServletActionContext;import org.dom4j.Attribute;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;import com.rbt.common.util.FileUtil;import com.rbt.common.util.PropertiesUtil;import java.io.IOException;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerConfigurationException;import javax.xml.transform.TransformerException;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.xml.sax.SAXException;public class RegularlyUpdatedAction extends BaseAction {// 获取系统根目录static final String CLASS_PATH = PropertiesUtil.getClassPath();// 获取标签sql配置文件private static String file_names = "quartz_job.xml";private static String file_path = CLASS_PATH + file_names;private String allXmldateString = "";private String redXmlDateString = "";private String opdate;private String upallXmldataString = "";private static String xmlutfString = "<?xml version="1.0" encoding="gb2312"?>";private static String xmlnameString = "name";private static String xmlquartzString = "quartz";private static String xmldescriptionString = "mydescription";private static String xmlgroupString = "group";private static String xmljob_classString = "job-class";private static String xmljob_groupString = "job-group";private static String xmlcron_expressionString = "cron-expression";private static String xmltriggerString = "trigger";private static String xmljob_nameString = "job-name";private static String xmljob_detailString = "job-detail";private static String xmljobString = "job";private static String xmlcronString = "cron";FileUtil fileUtil;/** * 方法描述：定时更新数据 * * @return * @throws Exception */public String list() throws Exception {readXML();if (allXmldateString != null && !allXmldateString.equals("")&& allXmldateString.length() > 4) {allXmldateString = allXmldateString.substring(0, allXmldateString.length() - 4);}if (redXmlDateString != null && !redXmlDateString.equals("")&& redXmlDateString.length() > 4) {redXmlDateString = redXmlDateString.substring(0, redXmlDateString.length() - 4);}//System.out.println("我需要的XML值：" + allXmldateString);return SUCCESS;}/** * 方法描述：读取XML文件信息 */public void readXML() {try {File file = new File(file_path);// 创建文件对象SAXReader reader = new SAXReader();// 创建SAX阅读器Document doc = reader.read(file);// 读取内容生成Document对象Element root = doc.getRootElement();// 取得根节点search(root);// 开始遍历} catch (Exception e) {e.printStackTrace();}}// 递归遍历private void search(Element root) {String eNameString = "";String evalueString = "";Iterator it_element = root.elementIterator();// 将根节点下包含的元素组织成一个迭代器// 迭代while (it_element.hasNext()) {Element element = (Element) it_element.next();if (!element.getText().equals("")) {// System.out.println(element.getName() + "==节点的值是=="// + element.getText());if (element.getName().equals(xmlnameString)) {eNameString += element.getName() + "=" + element.getText()+ "##";}if (element.getName().equals(xmldescriptionString)) {eNameString += element.getName() + "=" + element.getText()+ "##";evalueString += element.getText() + "##";}if (element.getName().equals(xmlgroupString)) {eNameString += element.getName() + "=" + element.getText()+ "##";}if (element.getName().equals(xmljob_classString)) {eNameString += element.getName() + "=" + element.getText()+ "##";}if (element.getName().equals(xmljob_nameString)) {eNameString += element.getName() + "=" + element.getText()+ "##";}if (element.getName().equals(xmljob_groupString)) {eNameString += element.getName() + "=" + element.getText()+ "##";}if (element.getName().equals(xmlcron_expressionString)) {eNameString += element.getName() + "=" + element.getText()+ "##";evalueString += element.getText() + "##";}} else {System.out.println(element.getName() + "==节点");}search(element);// 递归调用}if (!eNameString.equals("")) {allXmldateString += eNameString + "&&";}if (!evalueString.equals("")) {redXmlDateString += evalueString + "&&";}}/** * AJAX定时更新 * * @throws Exception */public void updatedRegularly() throws Exception {HttpServletRequest request = ServletActionContext.getRequest();HttpServletResponse response = ServletActionContext.getResponse();request.setCharacterEncoding("UTF-8");response.setCharacterEncoding("UTF-8");PrintWriter out = ServletActionContext.getResponse().getWriter();String outputString = "1";try {File file = new File(file_path);// 创建文件对象SAXReader reader = new SAXReader();// 创建SAX阅读器Document doc = reader.read(file);// 读取内容生成Document对象/* * 调用ModiXMLFiles()更新XML */ModiXMLFiles(doc);} catch (Exception e) {// TODO: handle exceptionoutputString = "2";}out.write(outputString);/* * 调用modifXML()更新XML */// try {// String filecontentString = modifXML();// fileUtil = new FileUtil();// fileUtil.writeTxt(CLASS_PATH, file_names, filecontentString);// File file = new File(file_path);// 创建文件对象// System.out.println("文件：" + file_names + "写入成功！");// } catch (Exception e) {// // TODO: handle exception// System.out.println("文件：" + file_names + "写入失败！");// outputString = "2";// }/* * 调用modifXML()更新XML */// String filecontentString = modifXML();// OutputFormat format = OutputFormat.createPrettyPrint();// /** 指定XML字符集编码 */// format.setEncoding("gb2312");// Document document = DocumentHelper.parseText(filecontentString);// XMLWriter writer = new XMLWriter(new FileWriter(file_path),format);// writer.write(document);// writer.close();/* * 调用ModiXMLFile()更新XML */// ModiXMLFile(file_path,file_path);}public void ModiXMLFiles(Document document) throws IOException {Element root = document.getRootElement(); // 得到根节点目录Iterator iter = root.elementIterator();String[] repvalueStrings = opdate.split("@@");Integer num = 0;//System.out.println("\r\n****** 获取的数据如下 ******");while (iter.hasNext()) {Element titleElement = (Element) iter.next();//System.out.println(titleElement.getName());// 读取xml的job元素if (titleElement.getName().equals(xmljobString)) {Iterator iter1 = titleElement.elementIterator();while (iter1.hasNext()) {Element titleElement1 = (Element) iter1.next();//System.out.println("1=:" + titleElement.getName());// 读取xml的trigger元素if (titleElement1.getName().equals(xmltriggerString)) {Iterator iter2 = titleElement1.elementIterator();while (iter2.hasNext()) {Element titleElement2 = (Element) iter2.next();//System.out.println("2=:" + titleElement2.getName());// 读取xml的cron元素if (titleElement2.getName().equals(xmlcronString)) {Iterator iter3 = titleElement2.elementIterator();while (iter3.hasNext()) {Element titleElement3 = (Element) iter3.next();//System.out.println("3=:"+ titleElement3.getName());// 读取xml的cron_expression元素if (titleElement3.getName().equals(xmlcron_expressionString)) {if (repvalueStrings[num] != null&& !repvalueStrings[num].toString().equals("")) {titleElement3.setText(repvalueStrings[num].toString());}num = num + 1;}}}}}}}}// 输出全部原始数据，在编译器中显示OutputFormat format = OutputFormat.createPrettyPrint();/** 指定XML字符集编码 */format.setEncoding("gb2312");// 输出全部原始数据，并用它生成新的我们需要的XML文件XMLWriter writer = new XMLWriter(new FileWriter(new File(file_path)),format);writer.write(document); // 输出到文件writer.close();}private String modifXML() {String allnewxmString = "";readXML();if (allXmldateString != null && !allXmldateString.equals("")&& allXmldateString.length() > 4) {allXmldateString = allXmldateString.substring(0, allXmldateString.length() - 4);}String newtitixmlString = xmlutfString;newtitixmlString += "<" + xmlquartzString + ">";String endtitlexmlString = "</" + xmlquartzString + ">";String newxmString = "";String[] strxmltexts = allXmldateString.split("##&&");String[] repvalueStrings = opdate.split("@@");for (int i = 0, ii = 0; i < strxmltexts.length; i = i + 2, ii++) {newxmString += "<" + xmljobString + ">";String models1 = "";String models2 = "";models1 = strxmltexts[i].toString();models2 = strxmltexts[i + 1].toString();String[] strmodel1 = models1.split("##");String[] strmodel2 = models2.split("##");newxmString += "<" + xmljob_detailString + ">";for (int j = 0; j < strmodel1.length; j++) {String[] strmodel11 = strmodel1[j].split("=");if (strmodel11 != null && strmodel11.length != 0) {if (strmodel11[0] != null) {newxmString += "<" + strmodel11[0].toString() + ">";if (strmodel11[1] != null) {newxmString += strmodel11[1].toString();}newxmString += "</" + strmodel11[0].toString() + ">";}}}newxmString += "</" + xmljob_detailString + ">";newxmString += "<" + xmltriggerString + ">";newxmString += "<" + xmlcronString + ">";for (int s = 0; s < strmodel2.length; s++) {String[] strmodel12 = strmodel2[s].split("=");if (strmodel12 != null && strmodel12.length != 0) {if (strmodel12[0] != null) {newxmString += "<" + strmodel12[0].toString() + ">";if (strmodel12[1] != null) {if (strmodel12[0].equals(xmlcron_expressionString)) {if (repvalueStrings[ii] != null) {newxmString += repvalueStrings[ii].toString();} else {newxmString += strmodel12[1].toString();}} else {newxmString += strmodel12[1].toString();}}newxmString += "</" + strmodel12[0].toString() + ">";}}}newxmString += "</" + xmlcronString + ">";newxmString += "</" + xmltriggerString + ">";newxmString += "</" + xmljobString + ">";}allnewxmString = newtitixmlString + newxmString + endtitlexmlString;return allnewxmString;}/** * 修改XML文件中内容,并另存为一个新文件 重点掌握dom4j中如何添加节点,修改节点,删除节点 * * @param filename * 修改对象文件 * @param newfilename * 修改后另存为该文件 * @return 返回操作结果, 0表失败, 1表成功 */public int ModiXMLFile(String filename, String newfilename) {int returnValue = 0;String[] repvalueStrings = opdate.split("@@");int num = 0;try {SAXReader saxReader = new SAXReader();Document document = saxReader.read(new File(filename));/** * 修改内容: 修改cron-expression项内容 */List list = document.selectNodes("cron-expression");Iterator iter = list.iterator();if (iter.hasNext()) {Element ownerElement = (Element) iter.next();ownerElement.setText(repvalueStrings[num]);num = num + 1;}try {OutputFormat format = OutputFormat.createPrettyPrint();/** 指定XML字符集编码 */format.setEncoding("gb2312");/** 将document中的内容写入文件中 */XMLWriter writer = new XMLWriter(new FileWriter(new File(newfilename)), format);writer.write(document);writer.close();/** 执行成功,需返回1 */returnValue = 1;} catch (Exception ex) {ex.printStackTrace();}} catch (Exception ex) {ex.printStackTrace();}return returnValue;}public int formatXMLFile(String filename) {int returnValue = 0;try {SAXReader saxReader = new SAXReader();Document document = saxReader.read(new File(filename));XMLWriter output = null;/** 格式化输出,类型IE浏览一样 */OutputFormat format = OutputFormat.createPrettyPrint();/** 指定XML字符集编码 */format.setEncoding("utf-8");output = new XMLWriter(new FileWriter(new File(filename)), format);output.write(document);output.close();/** 执行成功,需返回1 */returnValue = 1;} catch (Exception ex) {ex.printStackTrace();}return returnValue;}public String getAllXmldateString() {return allXmldateString;}public void setAllXmldateString(String allXmldateString) {this.allXmldateString = allXmldateString;}public String getRedXmlDateString() {return redXmlDateString;}public void setRedXmlDateString(String redXmlDateString) {this.redXmlDateString = redXmlDateString;}public String getOpdate() {return opdate;}public void setOpdate(String opdate) {this.opdate = opdate;}public String getUpallXmldataString() {return upallXmldataString;}public void setUpallXmldataString(String upallXmldataString) {this.upallXmldataString = upallXmldataString;}}