在Java Web中Excel文件如何使用POI实现导出

@Controllerpublic class StudentExportController{  @Autowired  private StudentExportService studentExportService;  @RequestMapping(value = "/excel/export")  public void exportExcel(HttpServletRequest request, HttpServletResponse response)  throws Exception {    List<Student> list = new ArrayList<Student>();    list.add(new Student(1000,"zhangsan","20"));    list.add(new Student(1001,"lisi","23"));    list.add(new Student(1002,"wangwu","25"));    HSSFWorkbook wb = studentExportService.export(list);    response.setContentType("application/vnd.ms-excel");    response.setHeader("Content-disposition", "attachment;filename=student.xls");    OutputStream ouputStream = response.getOutputStream();    wb.write(ouputStream);    ouputStream.flush();    ouputStream.close();  }}