主要有两个异常注解，@RestControllerAdvice和 @ExceptionHandler(Exception.class)

案例

package com.lwy.exception;

import com.lwy.pojo.Result;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(Exception.class)//捕获所有异常
    public Result ex(Exception ex){
        ex.printStackTrace();
        return Result.error("对不起，操作失败，请联系管理人");
    }
}