poi方式创建Excel文件

package poi;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class PoiExpExcel {

    public static void main(String[] args) {
        //表头
        String[] title = {"name", "age", "sex", "date"};
        //创建工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();        
        //创建sheet
        HSSFSheet sheet = workbook.createSheet();
        //创建行
        HSSFRow row = sheet.createRow(0);
        
        HSSFCell cell = null;
        for (int i = 0; i < title.length; i++) {
            //创建单元格
            cell = row.createCell(i);
            //设置单元格内容
            cell.setCellValue(title[i]);
        }
        //填写数据
        for (int i = 1; i < 10; i++) {
            //创建行
            HSSFRow nextrow = sheet.createRow(i);
            HSSFCell cell2 = nextrow.createCell(0);
            cell2.setCellValue("user"+1);
            cell2 = nextrow.createCell(1);
            cell2.setCellValue(12+i);
            cell2 = nextrow.createCell(2);
            cell2.setCellValue("M");
            cell2 = nextrow.createCell(3);
            cell2.setCellValue( new SimpleDateFormat("yyyy-MM-dd").format(new Date()));
            
            
        }
        //创建文件
        File file = new File("e:/poi_exp.xls");
        try {
            file.createNewFile();
            //打开一个文件流
            FileOutputStream stream = FileUtils.openOutputStream(file);
            //将工作簿写到文件流中
            workbook.write(stream);
            //关闭工作簿
            workbook.close();
            //关闭流
            stream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        

    }

}