我指定了一个自定义的Swagger UI端点。

springdoc:
  swagger-ui:
    path: /swagger-ui

然而，在浏览器访问它时返回404：

http://localhost:8080/swagger-ui

2026-05-08T20:00:23.390+03:00  INFO 10644 --- [task-service] [           main] o.s.boot.reactor.netty.NettyWebServer    : Netty started on port 8080 (http)
2026-05-08T20:00:23.397+03:00  INFO 10644 --- [task-service] [           main] c.e.task_service.TaskServiceApplication  : Started TaskServiceApplication in 5.287 seconds (process running for 5.885)
2026-05-08T20:00:23.402+03:00  WARN 10644 --- [task-service] [           main] o.s.core.events.SpringDocAppInitializer  : SpringDoc /v3/api-docs endpoint is enabled by default. To disable it in production, set the property 'springdoc.api-docs.enabled=false'

pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>4.0.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>task-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <properties>
        <java.version>21</java.version>
        <mapstruct.version>1.6.3</mapstruct.version>
        <lombok-mapstruct-binding.version>0.2.0</lombok-mapstruct-binding.version>
        <springdoc-openapi.ver>3.0.3</springdoc-openapi.ver>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-starter-webflux-ui</artifactId>
            <version>${springdoc-openapi.ver}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok-mapstruct-binding</artifactId>
            <version>${lombok-mapstruct-binding.version}</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct</artifactId>
            <version>${mapstruct.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>${lombok.version}</version>
                        </path>
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>${mapstruct.version}</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

http://localhost:8080/v3/api-docs 可用。虽然里面似乎什么也没有，可能是因为在使用 RouterFunctions时，我需要在代码中显式添加Swagger注解。

如何公开这个端点？过去只是把一个 springdoc 依赖粘贴到 pom 中。

解决方案

你访问的URL错了。按照你的配置，Swagger UI将暴露在以下地址：

http://localhost:8080/swagger-ui/index.html

index.html 会被自动附加，因为 /swagger-ui 指向Swagger UI的基础路径，而不是最终的HTML文件本身。

如果你希望Swagger UI能直接在自定义的HTML路径上可用，可以按如下配置：

springdoc:
  swagger-ui:
    path: /docs/swagger-ui.html

然后Swagger UI界面将可在以下路径访问：

http://localhost:8080/docs/swagger-ui.html