WritableWorkbook out = null;      try {	 response.getServletResponse().reset();	 ((HttpServletResponse) response.getServletResponse()).setHeader("Content-Disposition", "attachment;filename=export.xls");	 response.getServletResponse().setContentType("gbk");	 response.getServletResponse().setCharacterEncoding("gbk");	 response.getServletResponse().setContentType("application/vnd.ms-excel");	 out = Workbook.createWorkbook(((HttpServletResponse) response.getServletResponse()).getOutputStream());	 int sheetNum = 0;	 WritableSheet sheet = out.createSheet("第1页", sheetNum);	 Label labels = null;	 String[] labea = { "员工唯一号", "员工姓名", "补差開始时间", "补差结束时间", "申报工资" };	 for (int i = 0; i < labea.length; i++) {		 labels = new Label(i, 0, labea[i]);		 sheet.addCell(labels);	 }		 Label label = null;		 for (int i = 0; i < beans.size(); i++) {			 EmppostVo vo = (EmppostVo) beans.get(i);			 String emp_code = vo.getEmp_code() == null ? "" : vo.getEmp_code();			 String emp_name = vo.getEmp_name() == null ? "" : vo.getEmp_name();			 String startDate = vo.getStart_month()  == null ? "" : vo.getStart_month().substring(0, 11);			 String endDate = vo.getEnd_month()== null ? "" : vo.getEnd_month().substring(0, 11);			 String baseSalary = vo.getBase_salary()== null ? "" : vo.getBase_salary(); 			 String[] strArr = { emp_code, emp_name, startDate, endDate,baseSalary};			 for (int j = 0; j < strArr.length; j++) {				 label = new Label(j, i + 1, strArr[j]);				 sheet.addCell(label);			 }		 }		 out.write();	 } catch (RuntimeException e) {		 e.printStackTrace();	 }finally{         	out.close();	 }