创建包含换行符的XML文件
我参考了以下教程，使用JAVA创建XML文件。 http://www.mkyong.com/java/how-to-create-xml-file-in-java-dom/
但是，当我打开xml文件时，它会显示在1个极长的单行中。 这使得我很难validation结果，并且我确信可以为每个元素标记设置换行符。 但我没有任何线索如何做到这一点。 请指教。 以下是我的代码：
/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package ir; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.Transformer; 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.Attr; import org.w3c.dom.Document; import org.w3c.dom.Element; //############################################################################################################## public class IR { public static void main(String[] args) { IR obj = new IR(); obj.Reader(); }//end main //############################################################################################################## public void Reader() { String csvFile = "TWEETS.csv"; BufferedReader br = null; String line = ""; String cvsSplitBy = ","; String[] heading = {}; //The headings (Eg ID, Message, Link) String[] content = {}; int counter = 0; //Num of columns boolean isheading = true; //First line is heading try { //############################################################################################################## DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); // elements Document doc = docBuilder.newDocument(); Element rootElement = doc.createElement("add"); doc.appendChild(rootElement); //############################################################################################################## br = new BufferedReader(new FileReader(csvFile)); while ((line = br.readLine()) != null) { //The first line is heading if(isheading) { //The headings (Eg ID, Message, Link) heading = line.split(cvsSplitBy); counter = heading.length; //get number of columns isheading = false; continue; //Go to next loop }else{ //2nd line onwards content = line.split(cvsSplitBy); System.out.println("SG News " + "[ID= " + content[0] + " , FULL_MESSAGE=" + content[1] + "]"); } //############################################################################################################## // elements Element docEle = doc.createElement("doc"); rootElement.appendChild(docEle); //Loop according to number of columns for(int i=0; i<counter; i++) { // elements Element fieldEle = doc.createElement("field"); rootElement.appendChild(fieldEle); // set attribute to element Attr attr = doc.createAttribute("name"); attr.setValue(heading[i]); fieldEle.setAttributeNode(attr); fieldEle.appendChild(doc.createTextNode(content[i])); } //############################################################################################################## } //############################################################################################################## // write the content into xml file TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(doc); StreamResult result = new StreamResult(new File("TWEETs_solr.xml")); // Output to console for testing transformer.transform(source, result); System.out.println("File saved!"); //############################################################################################################## }catch (ParserConfigurationException pce) { pce.printStackTrace(); }catch (TransformerException tfe) { tfe.printStackTrace(); }catch (FileNotFoundException e) { e.printStackTrace(); }catch (IOException e) { e.printStackTrace(); }finally { if (br != null) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } } System.out.println("Done"); }//end Reader //############################################################################################################## }//end class 您需要向变换器对象添加属性。 喜欢这个：
Transformer transformer = transformerFactory.newTransformer(); transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); transformer.setOutputProperty(OutputKeys.INDENT, "yes");
它应该做的伎俩。