核心原理
- 底层依赖 Spring MVC ControllerAdvice
ControllerAdvice
- 看名字就知道，类似 AOP Advice 功能，但是底层实现不是动态代理，依赖
三种功能
@ModelAttribute
- 修改 Model 参数
@ExceptionHandler
- 处理全局异常
@InitBinder
- 全局参数的绑定
Problem 使用 @ExceptionHandler
定义了 核心类
ProblemHandling, 该接口继承了定好的各种异常类型的ExceptionHandler 默认实现public interface ProblemHandling extends GeneralAdviceTrait, HttpAdviceTrait, IOAdviceTrait, RoutingAdviceTrait, SecurityAdviceTrait, ValidationAdviceTrait { }1
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* ```java
public interface ProblemAdviceTrait extends AdviceTrait {
@API(status = INTERNAL)
@ExceptionHandler
default ResponseEntity<Problem> handleProblem(
final ThrowableProblem problem,
final NativeWebRequest request) {
return create(problem, request);
}
}