维护从XML到Excel文件的层次结构 – Java

我有一个包含嵌套logging的XML文件。 我必须从文件中获取logging并写入Excel文件。 现在，我制作的文件是一个平面文件。 （我用Apache POI写入Excel文件）。 我需要它来维护分层信息，使嵌套的logging缩进。

我的XML文件如下所示： 

<node> <id>123</id> <label>ABC</label> <node> <id>456</id> <label>DEF</label> ....... so on

我目前的Excel看起来像：

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我需要像（代表XML文件中的层次结构）：

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有没有人有类似的经验吗？ 我真的很感谢帮助。

如果你愿意testingSaxparsing器，我可能有一个解决scheme，你可以尝试。 下面是我使用的类，它包含一个SAXParser的默认处理程序，以及在input到xlsx文件之前用来格式化xml文件的代码。 它看起来有点高，所以我试图尽可能地添加评论，使其可以理解。 

  public class SO2 { private SO2(File xml){ wb = new XSSFWorkbook(); //Workbook to create sheet = wb.createSheet(); //Sheet to write to try { SO2.retrieveSaxParser().parse(xml, SO2.retrieveHandler()); //Begin parse Path file = Paths.get(System.getProperty("user.home"), "Desktop", "XMLTest.xlsx"); //Where to write file wb.write(new FileOutputStream(file.toString())); } catch (SAXException | IOException | ParserConfigurationException e) { JOptionPane.showMessageDialog(null, e.getMessage()); } System.exit(0); } protected static void instertUpdate(String data, int columnNum, int rowNum) {//Method to add to spreadsheet /*The below writes to the file, the row if statements are there to stop the method * overwriting any rows already created */ if(row != null){ if(row.getRowNum() != rowNum){ row = sheet.createRow(rowNum); } } else { row = sheet.createRow(rowNum); } cell = row.createCell(columnNum);//Make our cell cell.setCellValue(data);//Write to it } private static SAXParser retrieveSaxParser() throws ParserConfigurationException, SAXException{ return SAXParserFactory.newInstance().newSAXParser();//Get parser } private static DefaultHandler retrieveHandler() { DefaultHandler handler = new DefaultHandler(){//Handler with methods required for parsing xml @Override public void startElement(String uri, String localName,String qName, Attributes attributes) throws SAXException { if(startWasPrevious == true){//Start indenting after the first element tag processed indent++; } rowNumber++;//Move row down for each tag columnNumber = indent; //Cell number set to current indent level SO2.instertUpdate("<" + qName + ">", columnNumber, rowNumber);//Insert startWasPrevious = true; //For formatting previous = startTag;//For formatting } @Override public void endElement(String uri, String localName, String qName) throws SAXException { if(startWasPrevious == false){//For removal of indentation indent--; } if(!previous.equals("text")){//If text wasn't last part parsed then set column to indent columnNumber = indent; } else{//If text was processed last move cell across columnNumber++; } if(previous.equals("end")){//Move to a newline if last parsed element was an ending tag rowNumber++; } if(startWasPrevious == false){ //If there was no text previously SO2.instertUpdate("</" + qName + ">", columnNumber, rowNumber); } else { //If there was text then this will be enclosing end tag SO2.instertUpdate("</" + qName + ">", columnNumber, rowNumber); } startWasPrevious = false; //For formatting previous = endTag; } @Override public void characters(char ch[], int start, int length) throws SAXException { String s = new String(ch, start, length).trim();//Get text if(s.length() > 0){ columnNumber++; //Move column number along SO2.instertUpdate(s, columnNumber, rowNumber); previous = text; } } }; return handler; } //Main public static void main(String[] args) { JFrame file = new JFrame("File choice. . ."); file.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); FileDialog dialog = new FileDialog(file, "Choose a file", FileDialog.LOAD);//Get XML File dialog.setDirectory(Paths.get(System.getProperty("user.home")).resolve("Desktop").toString()); dialog.setFile("*.xml"); dialog.setVisible(true); if(dialog.getFile() == null){ System.exit(0); } else { xmlFile = new File(dialog.getDirectory() + dialog.getFile()); javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new SO2(xmlFile); } }); } } private static File xmlFile; private static XSSFWorkbook wb; private static Sheet sheet; private static Row row; private static Cell cell; private static boolean startWasPrevious = false; //For formatting purposes private static int rowNumber = -1; //Hold row number private static int columnNumber = 0;//Hold number of cell to wtite to private static int indent;//For indenting private static String previous = "";//To know what was last processed private static final String endTag = "end";//Values for previous to hold private static final String text = "text";//Values for previous to hold private static final String startTag = "start";//Values for previous to hold }

这是我用的xml文件： 

 <?xml version="1.0"?> <empire> <darkness> <sith> <title>Darth</title> <name>Vader</name> <power>Grip</power> </sith> <sith> <title>Darth</title> <name>Sidious</name> <power>Lightning</power> </sith> </darkness>

希望它有帮助，祝你好运

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