如何获取在spring错误控制器中抛出的异常类

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

@RestController
@ControllerAdvice
public class CustomErrorController implements ErrorController {

    @Override
    public String getErrorPath() {
        return "/error";
    }

    @RequestMapping("/error")
    public String handleError(HttpServletRequest request) {
        // 获取抛出的异常类
        Exception exception = (Exception) request.getAttribute("javax.servlet.error.exception");

        // 对异常进行处理
        if (exception != null) {
            // 记录日志或返回自定义错误信息
            return "发生错误：" + exception.getMessage();
        }

        return "发生未知错误";
    }

    @ExceptionHandler(Exception.class)
    public String handleException(Exception exception) {
        // 对特定异常进行处理
        return "发生异常：" + exception.getMessage();
    }
}