全局异常处理（网关异常&业务异常）

ruoyi-gateway/src/main/java/com/ruoyi/gateway/handler/GatewayExceptionHandler.java

@@ -0,0 +1,66 @@
+package com.ruoyi.gateway.handler;
+
+import org.springframework.cloud.gateway.support.NotFoundException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+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.HttpStatus;
+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 com.alibaba.fastjson.JSON;
+import com.ruoyi.common.core.domain.R;
+import reactor.core.publisher.Mono;
+
+/**
+ * 网关统一异常处理
+ *
+ * @author ruoyi
+ */
+@Order(-1)
+@Configuration
+public class GatewayExceptionHandler implements ErrorWebExceptionHandler
+{
+    private static final Logger log = LoggerFactory.getLogger(GatewayExceptionHandler.class);
+
+    @Override
+    public Mono<Void> handle(ServerWebExchange exchange, Throwable ex)
+    {
+        ServerHttpResponse response = exchange.getResponse();
+
+        if (exchange.getResponse().isCommitted())
+        {
+            return Mono.error(ex);
+        }
+
+        String msg;
+
+        if (ex instanceof NotFoundException)
+        {
+            msg = "服务未找到";
+        }
+        else if (ex instanceof ResponseStatusException)
+        {
+            ResponseStatusException responseStatusException = (ResponseStatusException) ex;
+            msg = responseStatusException.getMessage();
+        }
+        else
+        {
+            msg = "内部服务器错误";
+        }
+
+        log.error("[网关异常处理]请求路径:{},异常信息:{}", exchange.getRequest().getPath(), ex.getMessage());
+
+        response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
+        response.setStatusCode(HttpStatus.OK);
+
+        return response.writeWith(Mono.fromSupplier(() -> {
+            DataBufferFactory bufferFactory = response.bufferFactory();
+            return bufferFactory.wrap(JSON.toJSONBytes(R.fail(msg)));
+        }));
+    }
+}