优化 Swagger 的实现，提升可读性

yudao-gateway/src/main/java/cn/iocoder/yudao/gateway/swagger/SwaggerHandler.java

 package cn.iocoder.yudao.gateway.swagger;
 
 
-import java.util.Optional;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -9,55 +8,47 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 import reactor.core.publisher.Mono;
-import springfox.documentation.swagger.web.SecurityConfiguration;
-import springfox.documentation.swagger.web.SecurityConfigurationBuilder;
-import springfox.documentation.swagger.web.SwaggerResourcesProvider;
-import springfox.documentation.swagger.web.UiConfiguration;
-import springfox.documentation.swagger.web.UiConfigurationBuilder;
+import springfox.documentation.swagger.web.*;
+
+import javax.annotation.Resource;
+import java.util.List;
+import java.util.Optional;
 
 /**
+ * Swagger Controller
+ *
  * @author zxliu
- * @create 2022-10-25 11:24
+ * @date 2022-10-25 11:24
  */
-
 @RestController
 @RequestMapping("/swagger-resources")
 public class SwaggerHandler {
 
+    @Resource
+    private SwaggerResourcesProvider swaggerResources;
+
+    @SuppressWarnings("SpringJavaAutowiredFieldsWarningInspection") // 只有 @Autowired 可以实现可选注入
     @Autowired(required = false)
     private SecurityConfiguration securityConfiguration;
-
+    @SuppressWarnings("SpringJavaAutowiredFieldsWarningInspection") // 只有 @Autowired 可以实现可选注入
     @Autowired(required = false)
     private UiConfiguration uiConfiguration;
 
-    private final SwaggerResourcesProvider swaggerResources;
-
-
-    @Autowired
-    public SwaggerHandler(SwaggerResourcesProvider swaggerResources) {
-        this.swaggerResources = swaggerResources;
+    @GetMapping("")
+    public Mono<ResponseEntity<List<SwaggerResource>>> swaggerResources() {
+        return Mono.just((new ResponseEntity<>(swaggerResources.get(), HttpStatus.OK)));
     }
 
-
     @GetMapping("/configuration/security")
     public Mono<ResponseEntity<SecurityConfiguration>> securityConfiguration() {
-        return Mono.just(new ResponseEntity<>(
-                Optional.ofNullable(securityConfiguration).orElse(SecurityConfigurationBuilder.builder().build()),
-                HttpStatus.OK));
+        return Mono.just(new ResponseEntity<>(Optional.ofNullable(securityConfiguration)
+                .orElse(SecurityConfigurationBuilder.builder().build()), HttpStatus.OK));
     }
 
-
     @GetMapping("/configuration/ui")
     public Mono<ResponseEntity<UiConfiguration>> uiConfiguration() {
-        return Mono.just(new ResponseEntity<>(
-                Optional.ofNullable(uiConfiguration).orElse(UiConfigurationBuilder.builder().build()), HttpStatus.OK));
-    }
-
-
-    @SuppressWarnings("rawtypes")
-    @GetMapping("")
-    public Mono<ResponseEntity> swaggerResources() {
-        return Mono.just((new ResponseEntity<>(swaggerResources.get(), HttpStatus.OK)));
+        return Mono.just(new ResponseEntity<>(Optional.ofNullable(uiConfiguration)
+                .orElse(UiConfigurationBuilder.builder().build()), HttpStatus.OK));
     }
 
 }

yudao-gateway/src/main/java/cn/iocoder/yudao/gateway/swagger/SwaggerProvider.java

 package cn.iocoder.yudao.gateway.swagger;
 
-import java.util.ArrayList;
-import java.util.List;
-import lombok.AllArgsConstructor;
+import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.util.StrUtil;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.cloud.gateway.config.GatewayProperties;
-import org.springframework.cloud.gateway.route.RouteLocator;
+import org.springframework.cloud.gateway.handler.predicate.PredicateDefinition;
+import org.springframework.cloud.gateway.route.RouteDefinition;
 import org.springframework.cloud.gateway.support.NameUtils;
 import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Component;
 import springfox.documentation.swagger.web.SwaggerResource;
 import springfox.documentation.swagger.web.SwaggerResourcesProvider;
 
+import javax.annotation.Resource;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
 /**
+ * Swagger 资源的 Provider 实现类
+ *
  * @author zxliu
- * @create 2022-10-25 11:23
+ * @date 2022-10-25 11:23
  */
-
 @Component
 @Primary
-@AllArgsConstructor
+@Slf4j
 public class SwaggerProvider implements SwaggerResourcesProvider {
 
-    private final RouteLocator routeLocator;
-    private final GatewayProperties gatewayProperties;
-
+    @Resource
+    private GatewayProperties gatewayProperties;
 
+    /**
+     * 获得 SwaggerResource 列表
+     *
+     * @return SwaggerResource 列表
+     */
     @Override
     public List<SwaggerResource> get() {
+        // 将 RouteDefinition 转换成 SwaggerResource
         List<SwaggerResource> resources = new ArrayList<>();
-        List<String> routes = new ArrayList<>();
-        routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
-        gatewayProperties.getRoutes().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId()))
-                .forEach(route -> route.getPredicates().stream()
-                        .filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
-                        .forEach(predicateDefinition -> resources.add(swaggerResource(route.getId(),
-                                predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
-                                        .replace("**", "v2/api-docs"))))
-                );
+        Set<String> serviceNames = new HashSet<>(); // 已处理的服务名，避免重复
+        gatewayProperties.getRoutes().forEach(route -> {
+            // 已存在的服务，直接忽略
+            String serviceName = route.getUri().getHost();
+            if (StrUtil.isEmpty(serviceName)) {
+                return;
+            }
+            if (!serviceNames.add(serviceName)) {
+                return;
+            }
 
-        return resources;
+            // 获得 Path PredicateDefinition
+            String path = getRoutePath(route);
+            if (path == null) {
+                return;
             }
 
+            // 重要：构建最终的 SwaggerResource 对象
+            resources.add(buildSwaggerResource(serviceName, path));
+        });
+        return resources;
+    }
 
-    private SwaggerResource swaggerResource(String name, String location) {
+    private SwaggerResource buildSwaggerResource(String name, String location) {
         SwaggerResource swaggerResource = new SwaggerResource();
         swaggerResource.setName(name);
         swaggerResource.setLocation(location);
@@ -50,4 +72,31 @@ public class SwaggerProvider implements SwaggerResourcesProvider {
         return swaggerResource;
     }
 
+    /**
+     * 获得路由的 Path
+     *
+     * ① 输入：
+     *  predicates:
+     *      - Path=/admin-api/system/**
+     * ② 输出：
+     *  /admin-api/system/v2/api-docs
+     *
+     * @param route 路由
+     * @return 路由
+     */
+    private String getRoutePath(RouteDefinition route) {
+        PredicateDefinition pathDefinition = CollUtil.findOne(route.getPredicates(),
+                predicateDefinition -> predicateDefinition.getName().equals("Path"));
+        if (pathDefinition == null) {
+            log.info("[get][Route({}) 没有 Path 条件，忽略接口文档]", route.getId());
+            return null;
+        }
+        String path = pathDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0");
+        if (StrUtil.isEmpty(path)) {
+            log.info("[get][Route({}) Path 的值为空，忽略接口文档]", route.getId());
+            return null;
+        }
+        return path.replace("/**", "/v2/api-docs");
+    }
+
 }

yudao-gateway/src/main/resources/application.yaml

@@ -10,9 +10,9 @@ spring:
         - id: system-admin-api # 路由的编号
           uri: grayLb://system-server
           predicates: # 断言，作为路由的匹配条件，对应 RouteDefinition 数组
-            - Path=/admin-api/system/**,/captcha/**
+            - Path=/admin-api/system/**
           filters:
-              - RewritePath=/admin-api/system/v2/api-docs, /v2/api-docs
+              - RewritePath=/admin-api/system/v2/api-docs, /v2/api-docs # 配置，保证转发到 /v2/api-docs
         - id: system-app-api # 路由的编号
           uri: grayLb://system-server
           predicates: # 断言，作为路由的匹配条件，对应 RouteDefinition 数组