使用POI把数据导出excel表

        在web开发中，有一个经典的功能，就是数据的导入导出。特别是数据的导出，在生产管理或者财务系统中用的非常普遍，因为这些系统经常要做一些报表打印的工作。而数据导出的格式一般是EXCEL。

        现在主流的操作Excel文件的开源工具有很多,用得比较多的就是Apache的POI及JExcelAPI。这里我们用Apache POI！我们先去Apache的大本营下载POI的jar包：http://poi.apache.org/ 。

在这里我抽出来我项目中的一段代码测试版的代码给大家演示，基本满足数据的导出需求

public class PoiToExcelTestAction  extends BaseAction<Staff>{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public  String stafftoExcel() throws Exception { 
    //获取所有员工集合
	List<Staff> staffList=	this.staffService.findAll();
	System.out.println(staffList.size());
    // 获取总列数  
    int CountColumnNum =18; //xls.size();
    // 创建Excel文档  
    @SuppressWarnings("resource")
	HSSFWorkbook hwb = new HSSFWorkbook();  
    
 //   Admin xlsDto = null;  
    // sheet 对应一个工作页  
    HSSFSheet sheet = hwb.createSheet("人员信息表"); 
    HSSFSheet sheet2 = hwb.createSheet("管理员信息表2");
    
    //第一个工作页的内容 
    HSSFRow firstrow = sheet.createRow(0); // 下标为0的行开始  
    HSSFCell[] firstcell = new HSSFCell[CountColumnNum];  
    String[] names = new String[CountColumnNum];  
    names[0] = "姓名";  
    names[1] = "性别";  
    names[2] = "年龄";  
    names[3] = "身份证号码";  
    names[4] = "手机号码";
    names[5] = "员工编号";
    names[6] = "服务次数";
    names[7] = "满意度";  
    names[8] = "员工邮箱";  
    names[9] = "微信号码";  
    names[10] = "入职时间";
    names[11] = "在职状态";
    names[12] = "权限";
    names[13] = "登陆用户名";
    names[14] = "员工备注";
    names[15] = "登陆密码";
    names[16] = "员工预约服务数";
    names[17] = "工作报告数";
    for (int j = 0; j < CountColumnNum; j++) {  
        firstcell[j] = firstrow.createCell(j);  
        firstcell[j].setCellValue(new HSSFRichTextString(names[j]));  
    }  
    for (int i = 0; i <staffList.size(); i++) {  
        // 创建一行  
    HSSFRow row = sheet.createRow(i+1);  
        // 得到要插入的每一条记录  
        Staff staff = staffList.get(i);  
        for (int colu = 0; colu <= CountColumnNum; colu++) {  
            // 在一行内循环  
            HSSFCell name = row.createCell(0); 
            name.setCellValue(staff.getStaffName());  
            
            HSSFCell xm = row.createCell(1);  
            xm.setCellValue(staff.getSex());  
            
            HSSFCell yxsmc = row.createCell(2);  
            yxsmc.setCellValue(staff.getAge());  
            
            HSSFCell kcm = row.createCell(3);  
            kcm.setCellValue(staff.getIdcard());  
            
            HSSFCell cj = row.createCell(4);  
            cj.setCellValue(staff.getPhoneNum());
            
            HSSFCell zk = row.createCell(5);  
            zk.setCellValue(staff.getPhoneNum());
            
            HSSFCell time = row.createCell(6);  
            time.setCellValue(staff.getStaffCode());
            
            HSSFCell xh = row.createCell(7); 
            xh.setCellValue(staff.getServiceNum());  
            
            HSSFCell email = row.createCell(8);  
            email.setCellValue(staff.getStaffEmail());  
            
            HSSFCell wx = row.createCell(9);  
            wx.setCellValue(staff.getWeixinNum());  
            
            HSSFCell time1 = row.createCell(10);  
            time1.setCellValue(staff.getJoinTime());  
            
            HSSFCell zz = row.createCell(11);  
            zz.setCellValue(staff.getNowState());
            
            HSSFCell qx = row.createCell(12);  
            qx.setCellValue(staff.getStorerole().toString());
            
            HSSFCell longinname = row.createCell(13);  
            longinname.setCellValue(staff.getLoginname());
            
            
            HSSFCell bz = row.createCell(14);  
            bz.setCellValue(staff.getStaffDetail());  
            
            HSSFCell loginpas = row.createCell(15); 
            loginpas.setCellValue(staff.getLoginpassword());  
            
            HSSFCell xiaofei = row.createCell(16);  
            xiaofei.setCellValue(staff.getXiaoFeies().size());  
            
            HSSFCell bg = row.createCell(17);  
            bg.setCellValue(staff.getReports().size());  
            
           
        }  
    }
        //第二个工作页内容
        HSSFRow firstrow1 = sheet2.createRow(0); // 下标为0的行开始  
        HSSFCell[] firstcell1 = new HSSFCell[7];  
        String[] names1 = new String[7];  
        names1[0] = "测试";  
        names1[1] = "测试";  
        names1[2] = "测试";  
        names1[3] = "测试";  
        names1[4] = "测试";
        names1[5] = "职务";
        names1[6] = "注册时间";
        for (int j = 0; j < 7; j++) {  
            firstcell1[j] = firstrow1.createCell(j);  
            firstcell1[j].setCellValue(new HSSFRichTextString(names1[j]));  
        }  
     //   for (int i = 0; i < xls.size(); i++) {  
            // 创建一行  
        HSSFRow row1 = sheet2.createRow(1);  
            // 得到要插入的每一条记录  
       //     xlsDto = xls.get(i);  
            for (int colu = 0; colu <= CountColumnNum; colu++) {  
                // 在一行内循环  
                HSSFCell xh = row1.createCell(0); 
                xh.setCellValue("132");  
                
                HSSFCell xm = row1.createCell(1);  
                xm.setCellValue("132");  
                
                HSSFCell yxsmc = row1.createCell(2);  
                yxsmc.setCellValue("132");  
                
                HSSFCell kcm = row1.createCell(3);  
                kcm.setCellValue("123");  
                
                HSSFCell cj = row1.createCell(4);  
                cj.setCellValue("123");
                
                HSSFCell zk = row1.createCell(5);  
                zk.setCellValue("123");
                
                HSSFCell time = row1.createCell(6);  
                time.setCellValue(new Date().toString());
            }  
   // }  
    // 创建文件输出流，准备输出电子表格  
   try{
	   OutputStream out = new FileOutputStream("e:管理员信息表.xls"); 
	    hwb.write(out);   
	    out.close();
	    System.out.println("数据库导出成功");
   }catch(Exception ex){
	   
	   
   }
	return null;  
}  
}