在Java中将xml文件转换为excel

我是一个Java初学者，我需要将一个xml文件转换为Excel。

我做了很多研究，发现我必须使用POI库，但我不确定如何使用它，如果它足够了，或者我需要另外一件事。

我真的觉得我被卡住了，我需要你的帮助！

Answer 1

这肩膀让你开始，记得我已经使用Apache POI来编写XML文件

我将这个XML文件作为input供您参考

 <book> <person> <first>hussain</first> <last>hussain</last> <age>21</age> </person> <person> <first>akhtar</first> <last>akhtar</last> <age>22</age> </person> <person> <first>wahid</first> <last>wahid</last> <age>23</age> </person> </book> package com.xmlParsing; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.Map; import java.util.Set; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.w3c.dom.*; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.DocumentBuilder; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; public class ReadAndPrintXMLFile { public static void main(String argv[]) { ArrayList<String> firstNames = new ArrayList<String>(); ArrayList<String> lastNames = new ArrayList<String>(); ArrayList<String> ages = new ArrayList<String>(); try { DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder(); Document doc = docBuilder.parse(new File("C:/Users/hussain.a/Desktop/book.xml")); // normalize text representation doc.getDocumentElement().normalize(); System.out.println("Root element of the doc is :\" "+ doc.getDocumentElement().getNodeName() + "\""); NodeList listOfPersons = doc.getElementsByTagName("person"); int totalPersons = listOfPersons.getLength(); System.out.println("Total no of people : " + totalPersons); for (int s = 0; s < listOfPersons.getLength(); s++) { Node firstPersonNode = listOfPersons.item(s); if (firstPersonNode.getNodeType() == Node.ELEMENT_NODE) { Element firstPersonElement = (Element) firstPersonNode; NodeList firstNameList = firstPersonElement.getElementsByTagName("first"); Element firstNameElement = (Element) firstNameList.item(0); NodeList textFNList = firstNameElement.getChildNodes(); System.out.println("First Name : "+ ((Node) textFNList.item(0)).getNodeValue().trim()); firstNames.add(((Node) textFNList.item(0)).getNodeValue().trim()); NodeList lastNameList = firstPersonElement.getElementsByTagName("last"); Element lastNameElement = (Element) lastNameList.item(0); NodeList textLNList = lastNameElement.getChildNodes(); System.out.println("Last Name : "+ ((Node) textLNList.item(0)).getNodeValue().trim()); lastNames.add(((Node) textLNList.item(0)).getNodeValue().trim()); NodeList ageList = firstPersonElement.getElementsByTagName("age"); Element ageElement = (Element) ageList.item(0); NodeList textAgeList = ageElement.getChildNodes(); System.out.println("Age : "+ ((Node) textAgeList.item(0)).getNodeValue().trim()); ages.add(((Node) textAgeList.item(0)).getNodeValue().trim()); }// end of if clause }// end of for loop with s var for(String firstName:firstNames) { System.out.println("firstName : "+firstName); } for(String lastName:lastNames) { System.out.println("lastName : "+lastName); } for(String age:ages) { System.out.println("age : "+age); } } catch (SAXParseException err) { System.out.println("** Parsing error" + ", line "+ err.getLineNumber() + ", uri " + err.getSystemId()); System.out.println(" " + err.getMessage()); } catch (SAXException e) { Exception x = e.getException(); ((x == null) ? e : x).printStackTrace(); } catch (Throwable t) { t.printStackTrace(); } XSSFWorkbook workbook = new XSSFWorkbook(); XSSFSheet sheet = workbook.createSheet("Sample sheet"); Map<String, Object[]> data = new HashMap<String, Object[]>(); for(int i=0;i<firstNames.size();i++) { data.put(i+"",new Object[]{firstNames.get(i),lastNames.get(i),ages.get(i)}); } Set<String> keyset = data.keySet(); int rownum = 0; for (String key : keyset) { Row row = sheet.createRow(rownum++); Object[] objArr = data.get(key); int cellnum = 0; for (Object obj : objArr) { Cell cell = row.createCell(cellnum++); if (obj instanceof Date) cell.setCellValue((Date) obj); else if (obj instanceof Boolean) cell.setCellValue((Boolean) obj); else if (obj instanceof String) cell.setCellValue((String) obj); else if (obj instanceof Double) cell.setCellValue((Double) obj); } } try { FileOutputStream out = new FileOutputStream(new File("C:/Users/hussain.a/Desktop/book.xlsx")); workbook.write(out); out.close(); System.out.println("Excel written successfully.."); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }// end of main } 

确保你已经添加了下面的jar

1. dom4j的-1.6.1.jar
2. STAX的API-1.0.1.jar
3. XMLBeans的-2.3.0.jar