Migrating from SpringFox

Remove springfox and swagger 2 dependencies. Add springdoc-openapi-ui dependency instead.

   <dependency>
      <groupId>org.springdoc</groupId>
      <artifactId>springdoc-openapi-ui</artifactId>
      <version>@springdoc.version@</version>
   </dependency>

Replace swagger 2 annotations with swagger 3 annotations (it is already included with springdoc-openapi-ui dependency). Package for swagger 3 annotations is io.swagger.v3.oas.annotations.
- @ApiParam -> @Parameter
- @ApiOperation -> @Operation
- @Api -> @Tag
- @ApiImplicitParams -> @Parameters
- @ApiImplicitParam -> @Parameter
- @ApiIgnore -> @Parameter(hidden = true) or @Operation(hidden = true) or @Hidden
- @ApiModel -> @Schema
- @ApiModelProperty -> @Schema

This step is optional: Only if you have multiple Docket beans replace them with GroupedOpenApi beans.

Before:

    @Bean
    public Docket publicApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("org.github.springshop.web.public"))
                .paths(PathSelectors.regex("/public.*"))
                .build()
                .groupName("springshop-public")
                .apiInfo(apiInfo());
    }

    @Bean
    public Docket adminApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("org.github.springshop.web.admin"))
                .paths(PathSelectors.regex("/admin.*"))
                .build()
                .groupName("springshop-admin")
                .apiInfo(apiInfo());
    }

Now:

    @Bean
    public GroupedOpenApi publicApi() {
        return GroupedOpenApi.builder()
                .setGroup("springshop-public")
                .pathsToMatch("/public/**")
                .build();
    }

    @Bean
    public GroupedOpenApi adminApi() {
        return GroupedOpenApi.builder()
                .setGroup("springshop-admin")
                .pathsToMatch("/admin/**")
                .build();
    }

If you have only one Docket -- remove it and instead add properties to your application.properties:

springdoc.packagesToScan=package1, package2
springdoc.pathsToMatch=/v1, /api/balance/**

Add bean of OpenAPI type. See example:

    @Bean
    public OpenAPI springShopOpenAPI() {
        return new OpenAPI()
                .info(new Info().title("SpringShop API")
                .description("Spring shop sample application")
                .version("v0.0.1")
                .license(new License().name("Apache 2.0").url("http://springdoc.org")))
                .externalDocs(new ExternalDocumentation()
                .description("SpringShop Wiki Documentation")
                .url("https://springshop.wiki.github.org/docs"));
    }

If the swagger-ui is served behind a proxy:
- https://springdoc.org/faq.html#how-can-i-deploy-the-doploy-springdoc-openapi-ui-behind-a-reverse-proxy.
To customise the Swagger UI
- https://springdoc.org/faq.html#how-can-i-configure-swagger-ui.
To hide an operation or a controller from documentation
- https://springdoc.org/faq.html#how-can-i-hide-an-operation-or-a-controller-from-documentation-.