java写xml 以及 向xml追加节点内容
import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.transform.OutputKeys;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerConfigurationException;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.dom4j.DocumentHelper;import org.w3c.dom.Attr;import org.w3c.dom.CDATASection;import org.w3c.dom.Comment;import org.w3c.dom.DOMConfiguration;import org.w3c.dom.DOMException;import org.w3c.dom.DOMImplementation;import org.w3c.dom.Document;import org.w3c.dom.DocumentFragment;import org.w3c.dom.DocumentType;import org.w3c.dom.Element;import org.w3c.dom.EntityReference;import org.w3c.dom.NamedNodeMap;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.w3c.dom.ProcessingInstruction;import org.w3c.dom.Text;import org.w3c.dom.UserDataHandler;
// 将用户要增加的倾向性分析数据增加至XML文件private static void updateSentimentFile(String title, String text, String lable,long time) throws Exception {String filePath = util.Constants.SENTIMENT_FILE_PATH;//获取配置的倾向性目录// 上传后实际保存在服务器上的文件名: String saveName = "sentiment_" + time + "_" + XString.random(8) + ".xml";//"_" + System.currentTimeMillis() + "_" + XString.random(8) + "_" + uploaded.getName();title = title.replaceAll("<", " ").replaceAll(">", " ");//过滤xml敏感符号 < 和 > text = text.replaceAll("<", " ").replaceAll(">", " ");//过滤xml敏感符号 < 和 > // 创建保存目录File toSave = new File(filePath + "a/");if (!toSave.exists()) {toSave.mkdirs();}// 保存文件toSave = new File(filePath + "a/" + saveName);File checkFile = new File(filePath + "b/check.txt");if(checkFile.exists()){//删除校验文件play.libs.Files.delete(checkFile);}createXML(title, text, lable, time, toSave);//写入添加的文件到A目录File bFile = new File(filePath + "b/");if (!bFile.exists()) {bFile.mkdirs();}bFile = new File(filePath + "b/sentiment.xml");if (!bFile.exists()) {play.libs.Files.copy(toSave, bFile);//B目录没有XML的情况下将A目录的XML写入B目录}else{writeXML(title, text, lable, time, bFile, toSave);//B目录存在XML的情况下 向B目录的XML增加写入传来的内容}checkFile.createNewFile();//重新创建校验文件}//向xml追加节点内容private static void writeXML(String title, String text, String lable, long time, File bFile, File aFile) throws Exception{/*Document docs = null;try {docs = play.libs.XML.getDocument(bFile);} catch (Exception e) {play.libs.Files.delete(bFile);play.libs.Files.copy(aFile, bFile);return;}*/ // 1.得到DOM解析器的工厂实例 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); // 2.从DOM工厂里获取DOM解析器 DocumentBuilder db = dbf.newDocumentBuilder(); // 3.解析XML文档，得到DOM树 Document docs = null;try {docs = db.parse(bFile);} catch (Exception e) {play.libs.Files.delete(bFile);play.libs.Files.copy(aFile, bFile);return;}//创建节点Element docElement = docs.createElement("doc");Element lableElement = docs.createElement("lable");Text l = docs.createTextNode(lable);lableElement.appendChild(l);//lableElement.setNodeValue(lable);Element titleElement = docs.createElement("title");Text t = docs.createTextNode(title);titleElement.appendChild(t);//titleElement.setNodeValue(title);Element textElement = docs.createElement("text");Text x = docs.createTextNode(text);textElement.appendChild(x);//textElement.setNodeValue(text);Element timeElement = docs.createElement("timemillis");Text m = docs.createTextNode(time + "");timeElement.appendChild(m);//添加父子关系docElement.appendChild(lableElement);docElement.appendChild(titleElement);docElement.appendChild(textElement);docElement.appendChild(timeElement);//Element docsElement=(Element)docs.getElementsByTagName("docs").item(0);//docsElement.appendChild(docElement);docs.getDocumentElement().appendChild(docElement);//保存xml文件 TransformerFactory transformerFactory=TransformerFactory.newInstance(); Transformer transformer=transformerFactory.newTransformer(); DOMSource domSource=new DOMSource(docs); //设置编码类型 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); StreamResult result=new StreamResult(new FileOutputStream(bFile)); //把DOM树转换为xml文件 transformer.transform(domSource, result);}//新建xml文件写入内容private static void createXML(String title, String text, String lable, long time, File bFile) throws Exception{ // 1.得到DOM解析器的工厂实例 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); // 2.从DOM工厂里获取DOM解析器 DocumentBuilder db = dbf.newDocumentBuilder(); // 3.创建document，即DOM树 Document docs = db.newDocument();//创建根节点 Element docsElement = docs.createElement("docs"); docs.appendChild(docsElement); //创建子节点Element docElement = docs.createElement("doc");Element lableElement = docs.createElement("lable");Text l = docs.createTextNode(lable);lableElement.appendChild(l);//lableElement.setNodeValue(lable);Element titleElement = docs.createElement("title");Text t = docs.createTextNode(title);titleElement.appendChild(t);//titleElement.setNodeValue(title);Element textElement = docs.createElement("text");Text x = docs.createTextNode(text);textElement.appendChild(x);//textElement.setNodeValue(text);Element timeElement = docs.createElement("timemillis");Text m = docs.createTextNode(time + "");timeElement.appendChild(m);//timeElement.setNodeValue(time + "");//添加父子关系docElement.appendChild(lableElement);docElement.appendChild(titleElement);docElement.appendChild(textElement);docElement.appendChild(timeElement);docsElement.appendChild(docElement);//保存xml文件 TransformerFactory transformerFactory=TransformerFactory.newInstance(); Transformer transformer=transformerFactory.newTransformer(); DOMSource domSource=new DOMSource(docs); //设置编码类型 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); StreamResult result=new StreamResult(new FileOutputStream(bFile)); //把DOM树转换为xml文件 transformer.transform(domSource, result);}