JAVA读取Excel2010

package com.file;


import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;


public class NewXls {


public static String outputFile = "c:/javafile/file.xlsx";


public static void main(String argv[]) {
try {
InputStream inputStream = new BufferedInputStream(new FileInputStream(outputFile));
XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
XSSFSheet sheet = workbook.getSheetAt(0);// 获取文件的指定工作表m 默认的第一个
XSSFRow row = sheet.createRow((short) 0);
XSSFCell cell = row.createCell((short) 0);  
            cell.setCellType(XSSFCell.CELL_TYPE_STRING);  
            cell.setCellValue("yestoday11");  
            FileOutputStream fOut = new FileOutputStream(outputFile);  
            workbook.write(fOut);  
            fOut.flush();  
            fOut.close();  
            System.out.println("文件生成...");  

} catch (Exception e) {
System.out.println("已運行 xlCreate() : " + e);
}
}

}

读写xls和xlsx格式时，HSSFWorkbook针对xls，XSSFWorkbook针对xlsx