如何全局处理Grails中的HTTP错误(状态代码4xx/5xx)？

import org.springframework.web.servlet.HandlerExceptionResolver
import org.springframework.web.servlet.ModelAndView

class CustomExceptionHandler implements HandlerExceptionResolver {

    @Override
    ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        // 处理异常逻辑
        // 可以根据不同的异常类型进行不同的处理
        // 例如，对于特定的异常，可以返回自定义的错误页面或错误信息

        // 设置响应状态码
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR)

        // 返回自定义的错误页面
        return new ModelAndView("error")
    }
}

import com.example.CustomExceptionHandler

beans = {
    customExceptionHandler(CustomExceptionHandler)
}

import org.springframework.http.HttpStatus
import org.springframework.web.servlet.ModelAndView

class CustomExceptionHandler implements HandlerExceptionResolver {

    @Override
    ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        if (ex instanceof NotFoundException) {
            // 处理404 Not Found异常
            response.setStatus(HttpStatus.NOT_FOUND.value())
            return new ModelAndView("notFound")
        } else if (ex instanceof UnauthorizedException) {
            // 处理401 Unauthorized异常
            response.setStatus(HttpStatus.UNAUTHORIZED.value())
            return new ModelAndView("unauthorized")
        } else {
            // 处理其他异常
            response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value())
            return new ModelAndView("error")
        }
    }
}