@RequestMapping("/student")
@Controller
public class StudentController {
 
 @Autowired
 private StudentService studentService;
 @Autowired
 private ClazzService clazzService;
 /**
 * 學生列表頁
 * @param model
 * @return
 */
 @RequestMapping(value="/list",method=RequestMethod.GET)
 public ModelAndView list(ModelAndView model){
 model.setViewName("student/student_list");
 List<Clazz> clazzList = clazzService.findAll();
 model.addObject("clazzList",clazzList );
 model.addObject("clazzListJson",JSONArray.fromObject(clazzList));
 return model;
 }
 
 /**
 * 獲取學生列表
 * @param name
 * @param page
 * @return
 */
 @RequestMapping(value="/get_list",method=RequestMethod.POST)
 @ResponseBody
 public Map<String, Object> getList(
 @RequestParam(value="name",required=false,defaultValue="") String name,
 @RequestParam(value="clazzId",required=false) Long clazzId,
 HttpServletRequest request,
 Page page
 ){
 Map<String, Object> ret = new HashMap<String, Object>();
 Map<String, Object> queryMap = new HashMap<String, Object>();
 queryMap.put("username", "%"+name+"%");
 Object attribute = request.getSession().getAttribute("userType");
 if("2".equals(attribute.toString())){
 //說明是學生
 Student loginedStudent = (Student)request.getSession().getAttribute("user");
 queryMap.put("username", "%"+loginedStudent.getUsername()+"%");
 }
 if(clazzId != null){
 queryMap.put("clazzId", clazzId);
 }
 queryMap.put("offset", page.getOffset());
 queryMap.put("pageSize", page.getRows());
 ret.put("rows", studentService.findList(queryMap));
 ret.put("total", studentService.getTotal(queryMap));
 return ret;
 }
 
 /**
 * 編輯學生信息
 * @param clazz
 * @return
 */
 @RequestMapping(value="/edit",method=RequestMethod.POST)
 @ResponseBody
 public Map<String, String> edit(Student student){
 Map<String, String> ret = new HashMap<String, String>();
 if(StringUtils.isEmpty(student.getUsername())){
 ret.put("type", "error");
 ret.put("msg", "學生姓名不能為空！");
 return ret;
 }
 if(StringUtils.isEmpty(student.getPassword())){
 ret.put("type", "error");
 ret.put("msg", "學生登錄密碼不能為空！");
 return ret;
 }
 if(student.getClazzId() == null){
 ret.put("type", "error");
 ret.put("msg", "請選擇所屬班級！");
 return ret;
 }
 if(isExist(student.getUsername(), student.getId())){
 ret.put("type", "error");
 ret.put("msg", "該姓名已存在！");
 return ret;
 }
 student.setSn(StringUtil.generateSn("S", ""));
 if(studentService.edit(student) <= 0){
 ret.put("type", "error");
 ret.put("msg", "學生添加失??！");
 return ret;
 }
 ret.put("type", "success");
 ret.put("msg", "學生修改成功！");
 return ret;
 }
 
 
 /**
 * 添加學生信息
 * @param student
 * @return
 */
 @RequestMapping(value="/add",method=RequestMethod.POST)
 @ResponseBody
 public Map<String, String> add(Student student){
 Map<String, String> ret = new HashMap<String, String>();
 if(StringUtils.isEmpty(student.getUsername())){
 ret.put("type", "error");
 ret.put("msg", "學生姓名不能為空！");
 return ret;
 }
 if(StringUtils.isEmpty(student.getPassword())){
 ret.put("type", "error");
 ret.put("msg", "學生登錄密碼不能為空！");
 return ret;
 }
 if(student.getClazzId() == null){
 ret.put("type", "error");
 ret.put("msg", "請選擇所屬班級！");
 return ret;
 }
 if(isExist(student.getUsername(), null)){
 ret.put("type", "error");
 ret.put("msg", "該姓名已存在！");
 return ret;
 }
 student.setSn(StringUtil.generateSn("S", ""));
 if(studentService.add(student) <= 0){
 ret.put("type", "error");
 ret.put("msg", "學生添加失??！");
 return ret;
 }
 ret.put("type", "success");
 ret.put("msg", "學生添加成功！");
 return ret;
 }
 
 /**
 * 刪除學生信息
 * @param ids
 * @return
 */
 @RequestMapping(value="/delete",method=RequestMethod.POST)
 @ResponseBody
 public Map<String, String> delete(
 @RequestParam(value="ids[]",required=true) Long[] ids
 ){
 Map<String, String> ret = new HashMap<String, String>();
 if(ids == null || ids.length == 0){
 ret.put("type", "error");
 ret.put("msg", "請選擇要刪除的數(shù)據(jù)！");
 return ret;
 }
 try {
 if(studentService.delete(StringUtil.joinString(Arrays.asList(ids), ",")) <= 0){
 ret.put("type", "error");
 ret.put("msg", "刪除失敗！");
 return ret;
 }
 } catch (Exception e) {
 // TODO: handle exception
 ret.put("type", "error");
 ret.put("msg", "該學生下存在其他信息，請勿沖動！");
 return ret;
 }
 ret.put("type", "success");
 ret.put("msg", "學生刪除成功！");
 return ret;
 }
 
 /**
 * 上傳用戶頭像圖片
 * @param photo
 * @param request
 * @param response
 * @return
 * @throws IOException
 */
 @RequestMapping(value="/upload_photo",method=RequestMethod.POST)
 @ResponseBody
 public Map<String, String> uploadPhoto(MultipartFile photo,
 HttpServletRequest request,
 HttpServletResponse response
 ) throws IOException{
 Map<String, String> ret = new HashMap<String, String>();
 if(photo == null){
 //文件沒有選擇
 ret.put("type", "error");
 ret.put("msg", "請選擇文件！");
 return ret;
 }
 if(photo.getSize() > 10485760){
 //文件沒有選擇
 ret.put("type", "error");
 ret.put("msg", "文件大小超過10M，請上傳小于10M的圖片！");
 return ret;
 }
 String suffix = photo.getOriginalFilename().substring(photo.getOriginalFilename().lastIndexOf(".") + 1,photo.getOriginalFilename().length());
 if(!"jpg,png,gif,jpeg".contains(suffix.toLowerCase())){
 ret.put("type", "error");
 ret.put("msg", "文件格式不正確，請上傳jpg,png,gif,jpeg格式的圖片！");
 return ret;
 }
 String savePath = request.getServletContext().getRealPath("/") + "\\upload\\";
 System.out.println(savePath);
 File savePathFile = new File(savePath);
 if(!savePathFile.exists()){
 savePathFile.mkdir();//如果不存在，則創(chuàng)建一個文件夾upload
 }
 //把文件轉存到這個文件夾下
 String filename = new Date().getTime() + "." + suffix;
 photo.transferTo(new File(savePath + filename ));
 ret.put("type", "success");
 ret.put("msg", "圖片上傳成功！");
 ret.put("src", request.getServletContext().getContextPath() + "/upload/" + filename);
 return ret;
 }
 
 private boolean isExist(String username,Long id){
 Student student = studentService.findByUserName(username);
 if(student != null){
 if(id == null){
 return true;
 }
 if(student.getId().longValue() != id.longValue()){
 return true;
 }
 }
 return false;
 }
}