springboot过滤器抛出的异常全局处理

全局异常捕获器只能捕获进入接口的异常，过滤器的异常无法捕获，此时定义一个过滤器异常处理器

package com.brt.cloudGateway.config.exception;

import com.alibaba.fastjson.JSONObject;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;

/**
 * @Description TODO
 * @Author: lyy
 * @date 2023/12/29 16:10
 */
@Order(-1)
@Configuration
public class GlobalErrorExceptionHandler implements ErrorWebExceptionHandler {

    @Override
    public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {

        ServerHttpResponse response = exchange.getResponse();
        if (response.isCommitted()) {
            return Mono.error(ex);
        }

        // 设置返回JSON
        response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
        if (ex instanceof ResponseStatusException) {
            response.setStatusCode(((ResponseStatusException) ex).getStatus());
        }

        return response.writeWith(Mono.fromSupplier(() -> {
            DataBufferFactory bufferFactory = response.bufferFactory();
            //返回响应结果
            ResEntity resEntity = new ResEntity(null, false, ex.getMessage());
            return bufferFactory.wrap(JSONObject.toJSONString(resEntity).getBytes(StandardCharsets.UTF_8));
        }));
    }
}