java 读取 excel 2003 或 excel 2007

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package com.common.website.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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.xssf.usermodel.XSSFWorkbook;

/**
*

*
• Title:[POI基础上的Excel数据读取工具]

*
• Description: [支持Excell2003,Excell2007,自动格式化数值型数据,自动格式化日期型数据]

*
• Copyright 2009 RoadWay Co., Ltd.

*
• All right reserved.

*
• Created by [惠万鹏] [Jan 20, 2010]

*
• Midified by [modifier] [modified time]

*
*
• 所需Jar包列表

*
• poi-3.6-20091214.jar

*
• poi-contrib-3.6-20091214.jar

*
• poi-examples-3.6-20091214.jar

*
• poi-ooxml-3.6-20091214.jar

*
• poi-ooxml-schemas-3.6-20091214.jar

*
• poi-scratchpad-3.6-20091214.jar

*
• xmlbeans-2.3.0.jar

*

*
* @version 1.0
*/
public class POIExcelUtil
{
    /** 总行数 */
    private int totalRows = 0;
   
    /** 总列数 */
    private int totalCells = 0;
   
    /** 构造方法 */
    public POIExcelUtil()
    {}
   
    /**
     *

     *
• Description:[根据文件名读取excel文件]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @param fileName
     * @return
     * @throws Exception
     */
    public List> read(String fileName)
    {
        List> dataLst = new ArrayList>();
       
        /** 检查文件名是否为空或者是否是Excel格式的文件 */
        if (fileName == null || !fileName.matches("^.+\\.(?i)((xls)|(xlsx))$"))
        {
            return dataLst;
        }
       
        boolean isExcel2003 = true;
        /** 对文件的合法性进行验证 */
        if (fileName.matches("^.+\\.(?i)(xlsx)$"))
        {
            isExcel2003 = false;
        }
       
        /** 检查文件是否存在 */
        File file = new File(fileName);
        if (file == null || !file.exists())
        {
            return dataLst;
        }
       
        try
        {
            /** 调用本类提供的根据流读取的方法 */
            dataLst = read(new FileInputStream(file), isExcel2003);
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
       
        /** 返回最后读取的结果 */
        return dataLst;
    }
   
    /**
     *

     *
• Description:[根据流读取Excel文件]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @param inputStream
     * @param isExcel2003
     * @return
     */
    public List> read(InputStream inputStream,
            boolean isExcel2003)
    {
        List> dataLst = null;
        try
        {
            /** 根据版本选择创建Workbook的方式 */
            Workbook wb = isExcel2003 ? new HSSFWorkbook(inputStream)
                    : new XSSFWorkbook(inputStream);
            dataLst = read(wb);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        return dataLst;
    }
   
    /**
     *

     *
• Description:[得到总行数]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @return
     */
    public int getTotalRows()
    {
        return totalRows;
    }
   
    /**
     *

     *
• Description:[得到总列数]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @return
     */
    public int getTotalCells()
    {
        return totalCells;
    }
   
    /**
     *

     *
• Description:[读取数据]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @param wb
     * @return
     */
    private List> read(Workbook wb)
    {
        List> dataLst = new ArrayList>();
       
        /** 得到第一个shell */
        Sheet sheet = wb.getSheetAt(0);
        this.totalRows = sheet.getPhysicalNumberOfRows();
        if (this.totalRows >= 1 && sheet.getRow(0) != null)
        {
            this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
        }
       
        /** 循环Excel的行 */
        for (int r = 0; r < this.totalRows; r++)
        {
            Row row = sheet.getRow(r);
            if (row == null)
            {
                continue;
            }
           
            ArrayList rowLst = new ArrayList();
            /** 循环Excel的列 */
            for (short c = 0; c < this.getTotalCells(); c++)
            {
                Cell cell = row.getCell(c);
                String cellValue = "";
                if (cell == null)
                {
                    rowLst.add(cellValue);
                    continue;
                }
               
                /** 处理数字型的,自动去零 */
                if (Cell.CELL_TYPE_NUMERIC == cell.getCellType())
                {
                    /** 在excel里,日期也是数字,在此要进行判断 */
                    if (HSSFDateUtil.isCellDateFormatted(cell))
                    {
                        cellValue = DateUtil.get4yMdHms(cell.getDateCellValue());
                    }
                    else
                    {
                        cellValue = getRightStr(cell.getNumericCellValue() + "");
                    }
                }
                /** 处理字符串型 */
                else if (Cell.CELL_TYPE_STRING == cell.getCellType())
                {
                    cellValue = cell.getStringCellValue();
                }
                /** 处理布尔型 */
                else if (Cell.CELL_TYPE_BOOLEAN == cell.getCellType())
                {
                    cellValue = cell.getBooleanCellValue() + "";
                }
                /** 其它的,非以上几种数据类型 */
                else
                {
                    cellValue = cell.toString() + "";
                }
               
                rowLst.add(cellValue);
            }
            dataLst.add(rowLst);
        }
        return dataLst;
    }
   
    /**
     *

     *
• Description:[正确地处理整数后自动加零的情况]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @param sNum
     * @return
     */
    private String getRightStr(String sNum)
    {
        DecimalFormat decimalFormat = new DecimalFormat("#.000000");
        String resultStr = decimalFormat.format(new Double(sNum));
        if (resultStr.matches("^[-+]?\\d+\\.[0]+$"))
        {
            resultStr = resultStr.substring(0, resultStr.indexOf("."));
        }
        return resultStr;
    }
   
    /**
     *

     *
• Description:[测试main方法]

     *
• Created by [Huyvanpull] [Jan 20, 2010]

     *
• Midified by [modifier] [modified time]

     *

     *
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception
    {
        List> dataLst = new POIExcelUtil()
                .read("e:/Book1_shao.xls");
        for (ArrayList innerLst : dataLst)
        {
            StringBuffer rowData = new StringBuffer();
            for (String dataStr : innerLst)
            {
                rowData.append(",").append(dataStr);
            }
            if (rowData.length() > 0)
            {
                System.out.println(rowData.deleteCharAt(0).toString());
            }
        }
    }
}