我拆过的坑cycx

java.lang.NullPointerException: null

at com.springboot.annotation.controller.UserActionController.getById(UserActionController.java:36) ~[classes/:na]

@RestController

@RequestMapping("user")

public class RestFullController {

    @GetMapping

    public User get(){

        User user = new User(1,"2wa","m

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcCo

    @RequestMapping("/path/{id}/{type}")

    public ModelAndView path(@PathVariable(required = false) int id,

                          &nbs

param(@RequestParam("id") int id){

    System.out.println("id="+id);

    ModelAndView view = new ModelAndView(PAGE);

    view.addObject("id",id);

mapperxml里面配置漏了，namespace 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoC