POI读取Excel(兼容Excel2003、Excel2007)

package excel3;

/**
 * ClassName:ExcelReader.java
 * Author: wenbin.ji
 * CreateTime: Jan 28, 2011 11:16:29 AM
 * Description:Excel数据读取工具类，POI实现，兼容Excel2003，及Excel2007
 **/

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
 

public class ExcelReader {
  Workbook wb = null;
  List<String[]> dataList = new ArrayList<String[]>(100);
  public ExcelReader(String path){
    try {
      InputStream inp = new FileInputStream(path);
      wb = WorkbookFactory.create(inp);     
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (InvalidFormatException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
   
  } 
 
  /**
   * 取Excel所有数据，包含header
   *   List<String[]>
   */
 public List<String[]> getAllData(int sheetIndex){
    int columnNum = 0;
    Sheet sheet = wb.getSheetAt(sheetIndex);
    if(sheet.getRow(0)!=null){
        columnNum = sheet.getRow(0).getLastCellNum()-sheet.getRow(0).getFirstCellNum();
    }
    if(columnNum>0){
      for(Row row:sheet){
          String[] singleRow = new String[columnNum];
          int n = 0;
          for(int i=0;i<columnNum;i++){
             Cell cell = row.getCell(i, Row.CREATE_NULL_AS_BLANK);
             switch(cell.getCellType()){
               case Cell.CELL_TYPE_BLANK:
                 singleRow[n] = "";
                 break;
               case Cell.CELL_TYPE_BOOLEAN:
                 singleRow[n] = Boolean.toString(cell.getBooleanCellValue());
                 break;
                //数值
               case Cell.CELL_TYPE_NUMERIC:              
                 if(DateUtil.isCellDateFormatted(cell)){
                   singleRow[n] = String.valueOf(cell.getDateCellValue());
                 }else{
                   cell.setCellType(Cell.CELL_TYPE_STRING);
                   String temp = cell.getStringCellValue();
                   //判断是否包含小数点，如果不含小数点，则以字符串读取，如果含小数点，则转换为Double类型的字符串
                   if(temp.indexOf(".")>-1){
                     singleRow[n] = String.valueOf(new Double(temp)).trim();
                   }else{
                     singleRow[n] = temp.trim();
                   }
                 }
                 break;
               case Cell.CELL_TYPE_STRING:
                 singleRow[n] = cell.getStringCellValue().trim();
                 break;
               case Cell.CELL_TYPE_ERROR:
                 singleRow[n] = "";
                 break; 
               case Cell.CELL_TYPE_FORMULA:
                 cell.setCellType(Cell.CELL_TYPE_STRING);
                 singleRow[n] = cell.getStringCellValue();
                 if(singleRow[n]!=null){
                   singleRow[n] = singleRow[n].replaceAll("#N/A","").trim();
                 }
                 break; 
               default:
                 singleRow[n] = "";
                 break;
             }
             n++;
          }
          if("".equals(singleRow[0])){continue;}//如果第一行为空，跳过
          dataList.add(singleRow);
      }
    }
    return dataList;
  } 
  /**
   * 返回Excel最大行index值，实际行数要加1
   */
  public int getRowNum(int sheetIndex){
    Sheet sheet = wb.getSheetAt(sheetIndex);
    return sheet.getLastRowNum();
  }
 
  /**
   * 返回数据的列数
   */
  public int getColumnNum(int sheetIndex){
    Sheet sheet = wb.getSheetAt(sheetIndex);
    Row row = sheet.getRow(0);
    if(row!=null&&row.getLastCellNum()>0){
       return row.getLastCellNum();
    }
    return 0;
  }
 
  /**
   * 获取某一行数据
   * rowIndex 计数从0开始，rowIndex为0代表header行
   */
    public String[] getRowData(int sheetIndex,int rowIndex){
      String[] dataArray = null;
      if(rowIndex>this.getColumnNum(sheetIndex)){
        return dataArray;
      }else{
        dataArray = new String[this.getColumnNum(sheetIndex)];
        return this.dataList.get(rowIndex);
      }
     
    }
 
  /**
   * 获取某一列数据
   * colIndex
   */
  public String[] getColumnData(int sheetIndex,int colIndex){
    String[] dataArray = null;
    if(colIndex>this.getColumnNum(sheetIndex)){
      return dataArray;
    }else{  
      if(this.dataList!=null&&this.dataList.size()>0){
        dataArray = new String[this.getRowNum(sheetIndex)+1];
        int index = 0;
        for(String[] rowData:dataList){
          if(rowData!=null){
             dataArray[index] = rowData[colIndex];
             index++;
          }
        }
      }
    }
    return dataArray;
   
  }
 
 
  public static void main(String[] args) {
        ExcelReader excelReader=new ExcelReader("D:\\user.xls");
        List<String[]> dataList=excelReader.getAllData(0);
        for (String[] data : dataList) {
            System.out.println(Arrays.toString(data));
        }
    }
 }

 

 

注：文章来源：http://blog.csdn.net/jack0511/article/details/6179593

所需jar包：

commons-logging-1.1.jar

dom4j-1.6.1.jar

geronimo-stax-api_1.0_spec-1.0.jar

junit-3.8.1.jar

log4j-1.2.13.jar

poi-3.7-20101029.jar

poi-examples-3.7-20101029.jar

poi-ooxml-3.7-20101029.jar

poi-ooxml-schemas-3.7-20101029.jar

poi-scratchpad-3.7-20101029.jar

xmlbeans-2.3.0.jar