SSM整合 Controller的编写

 @Controller
    public class StudentController {
        //    @Autowired
//    StringUtil stringUtil;
        @Autowired
        StudentService studentService;
        private static final Logger log= LogManager.getLogger(StudentController.class);
        /**
         * 跳转到学生添加界面
         */
        @RequestMapping(value = "toStudentMore")
        public String toAddStudent(){
            log.info("1");
            return "StudentMore";
        }

        //查询,带校验
        //bindingResult接受错误
        @RequestMapping(value="StudentByName",method = RequestMethod.GET)
        public String findStudent(Model model,HttpServletRequest request, String name,
                                  @Validated Student student, BindingResult bindingResult){

            if(name.length()==0&& bindingResult.hasErrors()){
                //输出错误信息
                List<ObjectError> allErrors = bindingResult.getAllErrors();
                for (ObjectError objectError:allErrors){
                    log.error(objectError.getDefaultMessage());
                }
                //将错误信息传至页面
                model.addAttribute("allErrors",allErrors);
                //出错则重新至商品更新页面
                log.error(bindingResult);
                return "error";
            }
            log.error(bindingResult);
            List<Student> studentList=studentService.findStudentByName(name);
            //System.out.println(studentList);
            //addAttribute提交到前台,视图层才能显示数据
            model.addAttribute(studentList);
            return "ChosenOne";
        }

        @RequestMapping(value = "StudentMore")
        public String addStudent(Model model,HttpServletRequest request,@Validated Student student,BindingResult bindingResult) {
            if(student.getName().length()==0||student.getStudent_id()<1||bindingResult.hasErrors()){
                //输出错误信息
                List<ObjectError> allErrors = bindingResult.getAllErrors();
                for (ObjectError objectError:allErrors){
                    log.error(objectError.getDefaultMessage());
                }
                //将错误信息传至页面
                model.addAttribute("allErrors",allErrors);
                //出错则重新至商品更新页面
                log.error("执行了if语句块");
                return "error";
            }
            student.setCreate_time(System.currentTimeMillis());
            student.setUpdate_time(System.currentTimeMillis());
            studentService.insertStudent(student);
            model.addAttribute("student", student);
            return "insertSuccess";
        }


        //查询一个学生
    /*@RequestMapping(value="StudentById",method = RequestMethod.GET)
    public String findStudent(Model model, String name,
              @Validated Student student, BindingResult result){
        if (name==null && result.hasErrors()){
            List<ObjectError>allErrors=result.getAllErrors();
            for (ObjectError objectError:allErrors) {
                System.out.println(objectError.getDefaultMessage());
            }
            model.addAttribute("errors",allErrors);
            return "/error.jsp";
        }
        List<Student> studentList=studentService.findStudentByName(name);
        //System.out.println(studentList);
        //addAttribute提交到前台,视图层才能显示数据
        model.addAttribute(studentList);
        return "ChosenOne";
    }*/

        //删除
        @RequestMapping(value = "StudentLesser/{id}",method = RequestMethod.DELETE)
        public String deleteStudent(@PathVariable long id,@Validated Student student,BindingResult result){
            boolean flag = studentService.deleteStudent(id);
            log.info("1");
            if (flag = true){return "redirect:/actionSucceed";}
            else return "redirect:/actionFailed";
        }

        @RequestMapping(value = "actionSucceed",method = RequestMethod.GET)
        public String aS(){
            return "deleteSuccess";
        }
        @RequestMapping(value = "actionFailed",method = RequestMethod.GET)
        public String aF(){
            return "error";
        }
        @RequestMapping(value = "AllStudent", method =RequestMethod.GET)
        public String findAllStudent(Model model,
                                     @RequestParam(defaultValue = "1",required = true,
                                             value = "pageNo") Integer pageNo)  {
            Integer pageSize=5;//每页显示记录数为5
            PageHelper.startPage(pageNo,pageSize);
            List<Student>studentList=studentService.findAllStudent();//获取所有用户信息

            PageInfo<Student> pageInfo =new PageInfo<Student>(studentList);
            model.addAttribute("pageInfo",pageInfo);
            return "AllStudent";
        }

        //用jsontaglib返回查询一个人
        //通过@ResponseBody注解的方式,方法返回的对象不会经过视图解析器的渲染
    /*@RequestMapping(value = "findStudent_jstl",method = RequestMethod.GET)
    public @ResponseBody JSONObject jsonDemo()throws JSONException{
        Student student = studentService.findStudentById(180);
        log.error(student);
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("name",student.getName());
        jsonObject.put("wish",student.getWish());
        return jsonObject;
        //报no converter错误
    }*/

        //测试ResponseBody
        @RequestMapping("testJson")
        @ResponseBody
        public HashMap testJ()
        {
            HashMap student = new HashMap();
            student.put("student.id ", "1");
            student.put("student.name ", "王全");
            student.put("student.school ", "hbpu");
            student.put("student.major ", "java");
            return student;
        }

        //使用json tag-lib生成假数据.
        @RequestMapping("testJson2")
        public String selectAll(Model model) {
            List<Student> students = studentService.findAllStudent();
            model.addAttribute("code", "200");
            model.addAttribute("message", "传递成功");
            model.addAttribute("students", students);
            return "json";
        }

    }

明天计划的事情：Controller没写完 有些代码也没理解 
遇到的问题：MVC几个语法的错误 导致的BUG 百度解决
收获：又理解了一点MVC