first: poi 3.14 要求jdk1.6 或以上
       jar包去apache下载就可以了.
       另外,要完整运行需要xmlbeans 的jar包,  我下的是 xmlbeans-2.6.0.jar

附件里有 项目所用jar包,测试用的excel,及该项目

项目总共需要3个jar包,除jdk外:

     1 poi-3.14-xxxx.jar

      2 xmlbeans-2.6.jar

      3 poi-ooxml-3.14-xxx.jar

代码如下:

/**
 * 
 */
package helloWorld.com.cpic;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.EncryptedDocumentException;
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;

/**
 * poi读excel文件内容
 * @author c_liuhaibin
 * @version 2016年6月16日
 */
public class ReadSXLSFile
{

	public static void main(String[] x) throws EncryptedDocumentException, InvalidFormatException, IOException
	{
		String fullFileName ="G:/360data/重要数据/桌面/aaa.xls"; //"G:/360data/重要数据/桌面/aaa.xlsx";

		
		ReadSXLSFile x1 = new ReadSXLSFile();
		List<List> list=x1.readFile(fullFileName);
		for (List inlist : list)
		{
			for (Object object : inlist)
			{
				System.out.println(object.toString());
			}
		}
	}

	/**
	 * read excel file 
	 * @param file Ful Name：include file path
	 * @return list
	 * @throws EncryptedDocumentException
	 * @throws InvalidFormatException
	 * @throws IOException
	 */
	public List<List> readFile(String fileName) throws EncryptedDocumentException, InvalidFormatException, IOException
	{
		//官网说这种方式可以兼容两种格式的excel,03 and 07 的.
		List<List> list = new ArrayList<List>();
		Workbook workbook = WorkbookFactory.create(new File(fileName));
		
		
		List<Object> inList = null;
		for (Sheet sheet : workbook)
		{
			System.out.println("sheetName:" + sheet.getSheetName());
			for (Row row : sheet)
			{
				inList = new ArrayList<Object>();
				for (Cell cell : row)
				{
					switch (cell.getCellType())
					{
					// 字符串
					case Cell.CELL_TYPE_STRING:
						System.out.print("字符串:"+cell.getRichStringCellValue().getString());
						//? or getStringCellValue?
						inList.add(cell.getRichStringCellValue());
						break;
					case Cell.CELL_TYPE_NUMERIC:
						// 日期
						if (DateUtil.isCellDateFormatted(cell))
						{
							inList.add(cell.getDateCellValue());
							SimpleDateFormat sdf=new SimpleDateFormat("yyyy-mm-dd");
							System.out.print("日期:"+sdf.format(cell.getDateCellValue()));
						}
						// 数字
						else
						{
							inList.add(cell.getNumericCellValue());
							System.out.print("数字:"+cell.getNumericCellValue());
						}
						break;
					// 布尔
					case Cell.CELL_TYPE_BOOLEAN:
						inList.add(cell.getBooleanCellValue());
						System.out.print("布尔:"+cell.getBooleanCellValue());
						break;
					// 公式
					case Cell.CELL_TYPE_FORMULA:
						inList.add(cell.getCellFormula());
						System.out.print("公式:"+cell.getCellFormula());
						break;
					default:
						System.out.print("error ");
					}
				}
				System.out.println();
				list.add(inList);
			}
		}
		return list;
	}
}

 只写写helloWorld 当然没问题了,不过还有两个问题,希望高人出来指点一下:

1 cell.getRichStringCellValue() 跟 getStringCellValue 有啥区别?

2  为什么我测试用的excel的日期类型总是以数字格式读出来的?