废话少说直接上代码，记得是poi3.8版本啊。方法入口唯一，自动判断格式，使用接口引用，自动选择执行方法。

方法入口：

public static ArrayList explanExcelToList(String fileName) {

ArrayList list = new ArrayList();

Workbook wb = null;

try {

wb = get2003Workbook(new FileInputStream(fileName));

if (wb == null) {

wb = get2007Workbook(new FileInputStream(fileName));

if (wb == null) {

throw new RuntimeException("无法识别的格式，Unexpected Excel type (" + fileName + ")");

}

}

list = explanExcelToList(wb);

} catch (IOException e) {

e.printStackTrace();

}

return list;

}

package com.order.cc.outboundcall.impExlDate.svc;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.ss.formula.eval.ErrorEval;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.CellStyle;

import org.apache.poi.ss.usermodel.DataFormatter;

import org.apache.poi.ss.usermodel.DateUtil;

import org.apache.poi.ss.usermodel.RichTextString;

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;

import org.apache.struts.upload.FormFile;

public class ExcelHelper {

private static Integer SHEET_PAGE_NUM = 0;// 读取sheet页第一页

public static ArrayList explanExcelToList(String fileName) {

ArrayList list = new ArrayList();

Workbook wb = null;

try {

wb = get2003Workbook(new FileInputStream(fileName));

if (wb == null) {

wb = get2007Workbook(new FileInputStream(fileName));

if (wb == null) {

throw new RuntimeException("无法识别的格式，Unexpected Excel type (" + fileName + ")");

}

}

list = explanExcelToList(wb);

} catch (IOException e) {

e.printStackTrace();

}

return list;

}

public static ArrayList explanExcelToList(Workbook wb) {

ArrayList resList = new ArrayList();

if (wb == null) {

return resList;

}

try {

wb.setMissingCellPolicy(Row.RETURN_BLANK_AS_NULL);// 空白设置为null

// 读取第一章表格内容

Sheet sheet = wb.getSheetAt(SHEET_PAGE_NUM);

if (sheet == null) {

return resList;

}

// 循环输出表格中的内容

resList = explantSheet(sheet);

} catch (Exception e) {

e.printStackTrace();

}

return resList;

}

/**

*

* 功能说明 使用接口解析Sheet,支持HSSFSheet 与XSSFSheet格式

*

* @创建人 yxh

* @时间 2016-4-26

* @参数说明 @param list

* @参数说明 @param sheet

* @参数返回说明 void

*/

public static ArrayList explantSheet(Sheet sheet) {

ArrayList list = new ArrayList();

if (sheet == null) {

return list;

}

int rowNum = sheet.getRow(0) != null ? sheet.getRow(0).getPhysicalNumberOfCells() : 0;// 通过表头定义数组的位数，确定每行固定大小

if (rowNum == 0) {

rowNum = sheet.getRow(1) != null ? sheet.getRow(1).getPhysicalNumberOfCells() : 0;// 防止不写表头

}

for (int i = 0; i < sheet.getPhysicalNumberOfRows(); i++) {// 循环行

Row row = sheet.getRow(i);

if (row == null) {

continue;

}

String[] contentArr = new String[rowNum];

for (int j = 0; j < rowNum; j++) {// 循环列

Cell cell = row.getCell(j);

String text = "";

if (cell != null) {

text = formatCell(cell);

}

contentArr[j] = text;

}

list.add(contentArr);

}

return list;

}

/**

*

* 功能说明 格式化表格内容

*

* @创建人 yxh

* @时间 2016-4-26

* @参数说明 @param cell

* @参数说明 @return

* @参数返回说明 String

*/

public static String formatCell(Cell cell) {

DataFormatter _formatter = new DataFormatter();

switch (cell.getCellType()) {

case Cell.CELL_TYPE_STRING: // 2016年4月27日11:19:20 在excel中视为字符串形式

return cell.getRichStringCellValue().getString();

case Cell.CELL_TYPE_NUMERIC:// 数值型

if (DateUtil.isCellDateFormatted(cell)) {// 日期 poi

return dateToString(cell.getDateCellValue());

} else {

return _formatter.formatCellValue(cell);

}

case Cell.CELL_TYPE_BOOLEAN:

return cell.getBooleanCellValue() == true ? "true" : "false";// boolean

// 转成String

case Cell.CELL_TYPE_ERROR:

return ErrorEval.getText(cell.getErrorCellValue());// 返回错误码

case Cell.CELL_TYPE_FORMULA:// 公式

switch (cell.getCachedFormulaResultType()) {

case Cell.CELL_TYPE_STRING:

RichTextString str = cell.getRichStringCellValue();

if (str != null && str.length() > 0) {

return str.toString();

}

case Cell.CELL_TYPE_NUMERIC:

CellStyle style = cell.getCellStyle();

if (style == null) {

return cell.getNumericCellValue() + "";// double转成String

} else {

return _formatter.formatRawCellContents(cell.getNumericCellValue(), style.getDataFormat(), style.getDataFormatString());

}

case Cell.CELL_TYPE_BOOLEAN:

return cell.getBooleanCellValue() ? "true" : "false";// boolean

// 转成String

case Cell.CELL_TYPE_ERROR:

return ErrorEval.getText(cell.getErrorCellValue());

}

default:

throw new RuntimeException("Unexpected cell type (" + cell.getCellType() + ")");

}

}

public static String dateToString(Date date) {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

return sdf.format(date);

}

public static String dateToString(String date) {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

return sdf.format(date);

}

public static void closeFile(FormFile file) {

if (file != null) {

try {

file.destroy();

} catch (Exception e2) {

e2.printStackTrace();

}

}

}

public static Workbook get2003Workbook(InputStream is) {

Workbook wb = null;

try {

wb = new HSSFWorkbook(is);

} catch (Exception e) {

return wb;

}

return wb;

}

public static Workbook get2007Workbook(InputStream is) {

Workbook wb = null;

try {

wb = new XSSFWorkbook(is);

} catch (Exception e) {

return wb;

}

return wb;

}

public static boolean isExcel2003(InputStream is) {

try {

new HSSFWorkbook(is);

} catch (Exception e) {

return false;

}

return true;

}

public static boolean isExcel2007(InputStream is) {

try {

new XSSFWorkbook(is);

} catch (Exception e) {

return false;

}

return true;

}

public static void main(String[] args) {

// FormFile file=null;

// explanExcelToList(file);

}

}