如何使用Apache POI读取所有单元格值？

Question

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

请帮我解决这个问题。

感谢

Answer 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(); 
    } 
} 

}

Answer 2

有上和javaworld，It's POI-Fect文档显示你这是如何实现的。

实施例：

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 

//Iterate throw each row. 
Iterator<Row> rows = sheet.rowIterator(); 
while (rows.hasNext()) { 
    HSSFRow row = (HSSFRow) rows.next(); 

    Iterator<Cell> cells = row.cellIterator(); 
    while (cells.hasNext()) { 
     HSSFCell cell = (HSSFCell) cells.next(); 

     //Must do this, you need to get value based on the cell type 
     switch (cell.getCellType()) { 
      case HSSFCell.CELL_TYPE_NUMERIC: 
       System.out.println(cell.getNumericCellValue()); 
      break; 
      case HSSFCell.CELL_TYPE_STRING: 
       System.out.println(cell.getStringCellValue()); 
      break; 
      default: break; 
     } 
    } 
}