dsl3/controller/BizExceptionController.java

package com.aurora.controller;

import com.aurora.exception.BizException;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.SneakyThrows;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
//业务异常处理控制器，用于统一处理BizException类型的异常
@Api(tags = "异常处理模块")
@RestController//返回的结果会直接作为响应体返回
public class BizExceptionController {

    @SneakyThrows //用于隐藏异常的显示抛出声明（不用写throws Exception等声明）
    @ApiOperation("/处理BizException")
    @RequestMapping("/bizException")//映射请求路径为：/bizException，接收该路径的请求来处理异常
    public void handleBizException(HttpServletRequest request) {
        //HttpServletRequest request：通过请求对象获取存储在其中的异常信息
        if (request.getAttribute("bizException") instanceof BizException) {
            //如果是BizException类型，先打印该异常信息，再将其强制转换为BizException并抛出
            System.out.println(request.getAttribute("bizException"));
            throw ((BizException) request.getAttribute("bizException"));
        } else {
            throw new Exception();//抛出新的Exception
        }
    }

}