@Valid 参数校验

• 实体或者值对象的field加@xxx
• 方法入口参数加@Valid注解
• 自定义的注解需实现ConstraintValidator<IsPhoneNumber, String>接口

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异常统一拦截

• 根据类型捕获异常，最后返回前端

@ControllerAdvice  
@ResponseBody  
public class GlobalExceptionHandler {  
    @ExceptionHandler(value = Exception.class)

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拦截器Interceptor

• 实现

@Component
public class LoginRequiredInterceptor implements HandlerInterceptor {

• 注册拦截器

@Component
public class ToutiaoWebConfiguration extends WebMvcConfigurer{
    @Override
    public void addInterceptors(InterceptorRegistry registry) {

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方法参数注入

• 实现

@Service
public class UserArgumentResolver implements HandlerMethodArgumentResolver {
}

• 注册,属于参数解析

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers){

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