如何使用Apache POI读取所有单元格值?

2022-09-04 19:25:23

我想使用Apache POI从Excel工作表中读取所有单元格值,并将其存储到一维字符串数组中。是否可以逐行从Excel中读取数据并从每个单元格中提取值?

请帮我解决这个问题。

谢谢


答案 1

import java.io.FileInputStream;
import java.util.Iterator;
import java.util.Vector;

import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class ReadExcelFile {

public static void main( String [] args ) { String fileName="C:\\temp\\testPOI.xls"; //Read an Excel File and Store in a Vector Vector dataHolder=readExcelFile(fileName); //Print the data read printCellDataToConsole(dataHolder); } public static Vector readExcelFile(String fileName) { /** --Define a Vector --Holds Vectors Of Cells */ Vector cellVectorHolder = new Vector(); try{ /** Creating Input Stream**/ //InputStream myInput= ReadExcelFile.class.getResourceAsStream( fileName ); FileInputStream myInput = new FileInputStream(fileName); /** Create a POIFSFileSystem object**/ POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput); /** Create a workbook using the File System**/ HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem); /** Get the first sheet from workbook**/ HSSFSheet mySheet = myWorkBook.getSheetAt(0); /** We now need something to iterate through the cells.**/ Iterator rowIter = mySheet.rowIterator(); while(rowIter.hasNext()){ HSSFRow myRow = (HSSFRow) rowIter.next(); Iterator cellIter = myRow.cellIterator(); Vector cellStoreVector=new Vector(); while(cellIter.hasNext()){ HSSFCell myCell = (HSSFCell) cellIter.next(); cellStoreVector.addElement(myCell); } cellVectorHolder.addElement(cellStoreVector); } }catch (Exception e){e.printStackTrace(); } return cellVectorHolder; } private static void printCellDataToConsole(Vector dataHolder) { for (int i=0;i<dataHolder.size(); i++){ Vector cellStoreVector=(Vector)dataHolder.elementAt(i); for (int j=0; j < cellStoreVector.size();j++){ HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(j); String stringCellValue = myCell.toString(); System.out.print(stringCellValue+"\t"); } System.out.println(); } }

}


答案 2

有一个关于Java世界的文档,它是POI-Fect,向您展示如何实现这一点。

例:

String fileName = "C:/MyExcelFile.xls"; // file we are interested in
POIFSFileSystem fileSystem = new POIFSFileSystem(new FileInputStream(fileName));
HSSFWorkbook workbook = new HSSFWorkbook(fileSystem);
HSSFSheet sheet = workbook.getSheetAt(0); //Get first Excel Sheet

//STRING and NUMERIC are now Enums from org.apache.poi.ss.usermodel
for (Row row : sheet) {
        for (Cell cell: row) {
            switch (cell.getCellTypeEnum()) {
                case STRING:
                    System.out.print(cell.getStringCellValue() + "\t\t\t");
                    break;
                case NUMERIC:
                    System.out.print(cell.getNumericCellValue() + "\t\t\t");
                    break;
                default:
            }
        }
        System.out.println("");
    }

推荐