java下载创建好的Excel模板

1.废话不多说，直接上源码

//从数据库取数据创建表格	
private HSSFWorkbook exportStudentInfo(List<ExamStudentVo> studentList, List<ExamStudentVo> subjectName,
			Integer testId) {
		HSSFWorkbook wb = new HSSFWorkbook();
		HSSFSheet sheetlist = wb.createSheet();
		sheetlist.protectSheet(Constant.EXCEL_LOCK_PASSWORD);
		HSSFRow row1 = sheetlist.createRow(0);
		row1.createCell(0).setCellValue(Constant.EXCEL_ID);// 身份标识
		row1.createCell(1).setCellValue(testId);
		HSSFRow row2 = sheetlist.createRow(1);
		sheetlist.setColumnWidth(3, 15 * 256);// 设置宽度
		sheetlist.setColumnWidth(4, 12 * 256);
		row1.setZeroHeight(true);// 隐藏行
		sheetlist.setColumnHidden(1, true);// 隐藏列
		org.apache.poi.hssf.usermodel.HSSFCellStyle unLockCellStyle = wb.createCellStyle();
		unLockCellStyle.setLocked(false);
		row2.createCell(0).setCellValue("序号");
		row2.createCell(1).setCellValue("学生ID");
		row2.createCell(2).setCellValue("姓名");
		row2.createCell(3).setCellValue("年级");
		row2.createCell(4).setCellValue("班级");
		int t = 5;
		for (int i = 0; i < subjectName.size(); ++i) {
			row1.createCell(t).setCellValue(subjectName.get(i).getSubjectId());
			row2.createCell(t).setCellValue(subjectName.get(i).getSubjectName());
			t++;
		}
		int temRow = 2;

		for (int i = 0; i < studentList.size(); ++i) {
			HSSFRow row3 = sheetlist.createRow(temRow);
			if (StringUtil.isNullOrEmpty(studentList.get(i))) {
				continue;
			}
			row3.createCell(0).setCellValue(i + 1);
			row3.createCell(1).setCellValue(studentList.get(i).getStudentId());
			row3.createCell(2).setCellValue(studentList.get(i).getStudentName());
			row3.createCell(3)
					.setCellValue(studentList.get(i).getStageName() + "部" + studentList.get(i).getEntranceYear() + "级");
			row3.createCell(4).setCellValue(studentList.get(i).getClassName());
			temRow++;
			int tem = 5;
			for (int j = 0; j < subjectName.size(); ++j) {
				row3.createCell(tem).setCellValue(HSSFCell.CELL_TYPE_STRING);
				row3.createCell(tem).setCellStyle(unLockCellStyle);
				tem++;
			}
		}
		return wb;
	}

 2.下载

　　　　　　　　　　　　　　HSSFWorkbook wb = importScoreService.exportTestInfo(eq.getTestId());
    			String testName = importScoreService.getTestName(eq.getTestId());
    			ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    			wb.write(byteArrayOutputStream);
    			testName = StringUtils.deleteWhitespace(testName);
    			String dateTime = DateFormatUtils.format(new Date(), "yyyyMMddHHmm");
    			//设置文件标题
    			String outFile = "学生成绩/" + dateTime +"/" + testName + ".xls";
    			response.setContentType("application/vnd.ms-excel;charset=utf-8");
    			//对文件名编码  
    			outFile = response.encodeURL(new String(outFile.getBytes("gb2312"), "iso8859-1"));
    			//使用Servlet实现文件下载的时候，避免浏览器自动打开文件
    			response.addHeader("Content-Disposition", "attachment;filename=" + outFile);
    			//将流写进response输出流中  
    			ServletOutputStream outputstream = response.getOutputStream(); 
    			byteArrayOutputStream.writeTo(outputstream); 
    			byteArrayOutputStream.close();  
    			outputstream.flush(); 

 3.下载完毕