public class Student {             private long id;             private String name;             private int age;             private boolean sex;             private Date birthday;             public long getId() {            return id;        }             public void setId(long id) {            this.id = id;        }             public String getName() {            return name;        }             public void setName(String name) {            this.name = name;        }             public int getAge() {            return age;        }             public void setAge(int age) {            this.age = age;        }             public boolean getSex() {            return sex;        }             public void setSex(boolean sex) {            this.sex = sex;        }             public Date getBirthday() {            return birthday;        }             public void setBirthday(Date birthday) {            this.birthday = birthday;        }    }    编写默认的ExcelView    public class DefaultExcelView extends AbstractExcelView {                  @Override        protected void buildExcelDocument(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception {                 List<Object> dataSet = (List<Object>) model.get("dataSet");            String[] keys = (String[])model.get("keys");            String[] titles = (String[])model.get("titles");            String fileName = (String)model.get("fileName");            HSSFSheet sheet = workbook.createSheet();            sheet.setDefaultColumnWidth(12);                 for (int i = 0; i < titles.length; i++) {                HSSFCell cell = getCell(sheet,0,i);                setText(cell, titles[i]);            }                 for (int i = 0; i < dataSet.size(); i++) {                HSSFRow row = sheet.createRow(i+1);                Object obj = dataSet.get(i);                // 处理列                for(int j=0; j < keys.length; j++) {                    row.createCell(j).setCellValue(getFieldValueByName(keys[j], obj));                }            }                 fileName = new String(fileName.getBytes("UTF-8"),"ISO-8859-1") + ".xls";            response.setContentType("application/vnd.ms-excel");            response.setHeader("Content-disposition", "attachment;filename=" + fileName);            OutputStream outputStream = response.getOutputStream();            workbook.write(outputStream);            outputStream.flush();            outputStream.close();             }             /**         * 属性中的方法都是getXXX和setXXX，不存在isXXX         * @param fieldName         * @param obj         * @return         */        protected String getFieldValueByName(String fieldName, Object obj) {            String firstLetter = fieldName.substring(0,1).toUpperCase();            String getter = "get" + firstLetter + fieldName.substring(1);            try {                Method method = obj.getClass().getMethod(getter, new Class[]{});                Object value = method.invoke(obj, new Object[]{});                return value.toString();            } catch (Exception e) {                e.printStackTrace();                System.out.println("属性不存在！");            }            return "";        }    }    在controller层如何使用    @Controller    @RequestMapping(value = "/controller/student")    public class StudentController {                  @RequestMapping(value = "/export")        public ModelAndView export(ModelMap model) throws ParseException {            List<Student> dataSet = new ArrayList<Student>();            for (int i = 0; i < 20; i++) {                Student student = new Student();                student.setId(i);                student.setName("lgq"+i);                student.setAge(20);                student.setSex(false);                student.setBirthday(new Date());                dataSet.add(student);            }            String[] keys = new String[]{"id", "name", "age", "sex","birthday"};            String[] titles = new String[]{"编号", "姓名", "年龄", "性别", "生日"};            String fileName = "学生信息";            DefaultExcelView defaultExcelView = new DefaultExcelView();            model.put("dataSet", dataSet);            model.put("keys", keys);            model.put("titles", titles);            model.put("fileName", fileName);            return new ModelAndView(defaultExcelView, model);        }         }