如何在Excel中使用poi在Java中从头到尾阅读？

我使用的是Apache poi来读取表格的Excel文件，代码也没有任何问题，但代码从中间读取数据，而不是从文件的第一行读取。

代码是：

package org.sample; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFCell; import java.io.FileInputStream; import java.io.IOException; import java.util.Iterator; import java.util.List; import java.util.ArrayList; public class Main { @SuppressWarnings("unchecked") public static void main(String[] args) throws Exception { // // An excel file name. You can create a file name with a full // path information. // String fileName = "D:/workspace/ReadExlsx/xlsx/SampleData.xls"; // Create an ArrayList to store the data read from excel sheet. // List sheetData = new ArrayList(); FileInputStream fis = null; try { // // Create a FileInputStream that will be use to read the // excel file. // fis = new FileInputStream(fileName); // // Create an excel workbook from the file system. // HSSFWorkbook workbook = new HSSFWorkbook(fis); // // Get the first sheet on the workbook. // HSSFSheet sheet = workbook.getSheetAt(0); // // When we have a sheet object in hand we can iterator on // each sheet's rows and on each row's cells. We store the // data read on an ArrayList so that we can printed the // content of the excel to the console. // Iterator rows = sheet.rowIterator(); while (rows.hasNext()) { HSSFRow row = (HSSFRow) rows.next(); Iterator cells = row.cellIterator(); List data = new ArrayList(); while (cells.hasNext()) { HSSFCell cell = (HSSFCell) cells.next(); data.add(cell); } sheetData.add(data); } } catch (IOException e) { e.printStackTrace(); } finally { if (fis != null) { fis.close(); } } showExelData(sheetData); } private static void showExelData(List sheetData) { // // Iterates the data and print it out to the console. // for (int i = 0; i < sheetData.size(); i++) { List list = (List) sheetData.get(i); //for (int j = 0; j < list.size(); j++) { HSSFCell employeeid = (HSSFCell) list.get(0); HSSFCell department = (HSSFCell) list.get(3); HSSFCell date = (HSSFCell) list.get(5); System.out.print(employeeid.getRichStringCellValue().getString()+" , "); System.out.print(department.getRichStringCellValue().getString()+" , "); System.out.print(date.getRichStringCellValue().getString()); //if (j < list.size() - 1) { // System.out.print(", "); //} // } System.out.println(""); } } } 

请帮忙解决这个问题。

Answer 1

如果你有数据int我行和​​J列你应该尝试像这样的代码：

  for (int i = 0; i < sheetData.size(); i++) { List list = (List) sheetData.get(i); for (int j = 0; j < list.size(); j++) { HSSFCell employeeid = (HSSFCell) list.get(j); System.out.print(employeeid.getRichStringCellValue().getString()); if (j < list.size() - 1) { System.out.print(", "); } } System.out.println(""); } 

对我来说，它完美的工作。 我的poi版本是poi-3.8-20120306。

Answer 2

//获取XLS文件的工作簿实例

 XSSFWorkbook workbook = new XSSFWorkbook(file); 

//从工作簿获取第一个工作表

 XSSFSheet sheet = workbook.getSheetAt(0); ArrayList<String> columndata = null; Iterator<Row> rowIterator = sheet.iterator(); columndata = new ArrayList<>(); while (rowIterator.hasNext()) { Row row = rowIterator.next(); Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); if (row.getRowNum() > 0) { // To filter column headings if (cell.getColumnIndex() == 0) {// To match column // index switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC: columndata.add(cell.getNumericCellValue() + ""); break; case Cell.CELL_TYPE_STRING: columndata.add(cell.getStringCellValue()); break; } } } } }