BadRequest Reactive WebFlux -如何定制Spring错误消息

import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebExceptionHandler;
import reactor.core.publisher.Mono;

import java.util.List;

@Component
@Order(-2)
public class GlobalExceptionHandler implements WebExceptionHandler {

    @Override
    public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
        ServerHttpResponse response = exchange.getResponse();

        if (ex instanceof ResponseStatusException) {
            ResponseStatusException exception = (ResponseStatusException) ex;
            response.setStatusCode(exception.getStatus());
            response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
            String errorMessage = "自定义错误消息"; // 自定义错误消息内容
            byte[] errorMessageBytes = errorMessage.getBytes();
            DataBuffer buffer = response.bufferFactory().wrap(errorMessageBytes);
            return response.writeWith(Mono.just(buffer));
        }

        // 其他异常处理逻辑...

        return Mono.error(ex);
    }
}