Spring Boot集成SpringFox 3.0与Pageable参数处理

Springfox 3.0有多个模块，提供了spring boot starter，与Spring Boot集成时仅需引入springfox-boot-starter，如下：

<dependency><groupId>io.springfox</groupId><artifactId>springfox-boot-starter</artifactId><version>3.0.0</version>
</dependency>

如果您以前使用了Springfox 2.x，需要修改一下Swagger配置：

删除@EnableSwagger2注解，改为@EnableOpenApi
将Docket中的参数DocumentationType.SWAGGER_2改为DocumentationType.OAS_30
Springfox 3.0删除了一些第三方模块，如有引用需要替换
修改后的配置如下：

package com.ys.config;
import com.fasterxml.classmate.TypeResolver;
import org.itrunner.heroes.exception.ErrorMessage;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.ResponseEntity;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.oas.annotations.EnableOpenApi;
import springfox.documentation.service.*;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;import java.time.LocalDate;
import java.util.List;import static java.util.List.of;@EnableOpenApi
@Configuration
public class SwaggerConfig {@Beanpublic Docket createRestApi() {return new Docket(DocumentationType.OAS_30).select().apis(RequestHandlerSelectors.basePackage("com.ys.controller")).paths(PathSelectors.any()).build().apiInfo(apiInfo()).pathMapping("/").directModelSubstitute(LocalDate.class, String.class).genericModelSubstitutes(ResponseEntity.class).additionalModels(new TypeResolver().resolve(ErrorMessage.class)).useDefaultResponseMessages(false).securitySchemes(of(authenticationScheme())).securityContexts(of(securityContext())).enableUrlTemplating(false);}private ApiInfo apiInfo() {return new ApiInfoBuilder().title("Api Documentation").description("Api Documentation").contact(new Contact("xx", "http://xxxxxx", "[e-mail]")).version("1.0.0").build();}private HttpAuthenticationScheme authenticationScheme() {return HttpAuthenticationScheme.JWT_BEARER_BUILDER.name("BearerToken").build();}private SecurityContext securityContext() {return SecurityContext.builder().securityReferences(defaultAuth()).operationSelector(operationContext ->operationContext.requestMappingPattern().startsWith("/api/")).build();}private List<SecurityReference> defaultAuth() {AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];authorizationScopes[0] = authorizationScope;return of(new SecurityReference("BearerToken", authorizationScopes));}
}

上面我们使用了HttpAuthenticationScheme构建Bearer Token Authentication，在Swagger UI界面点击Authorize时直接输出token值即可。

Springfox 3.0的Swagger UI地址，从http://host/context-path/swagger-ui.html 改成了 http://host/context-path/swagger-ui/ ，OAS 3.0的api docs地址默认为/v3/api-docs，因此Security中的ignore path要进行相应修改。

Pageable参数
当REST API的方法含有org.springframework.data.domain.Pageable参数时，Springfox根据接口生成pageNumber、pageSize、offset、paged、unpaged、sort.sorted、sort.unsorted等参数，这与Spring Boot实际使用的参数是不一致的，因此需要针对Pageable参数进行特殊处理。

我们使用OperationBuilderPlugin处理Pageable参数，如下：

package com.ys.config;
import com.fasterxml.classmate.ResolvedType;
import com.fasterxml.classmate.TypeResolver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Component;
import springfox.documentation.builders.RequestParameterBuilder;
import springfox.documentation.schema.ScalarType;
import springfox.documentation.service.ParameterType;
import springfox.documentation.service.RequestParameter;
import springfox.documentation.service.ResolvedMethodParameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.OperationBuilderPlugin;
import springfox.documentation.spi.service.contexts.OperationContext;import java.util.ArrayList;
import java.util.List;@Component
@Order
public class PageableParameterReader implements OperationBuilderPlugin {private final TypeResolver resolver;@Autowiredpublic PageableParameterReader(TypeResolver resolver) {this.resolver = resolver;}@Overridepublic void apply(OperationContext context) {List<ResolvedMethodParameter> methodParameters = context.getParameters();ResolvedType pageableType = resolver.resolve(Pageable.class);List<RequestParameter> parameters = new ArrayList<>();for (ResolvedMethodParameter methodParameter : methodParameters) {ResolvedType resolvedType = methodParameter.getParameterType();if (pageableType.equals(resolvedType)) {parameters.add(new RequestParameterBuilder().in(ParameterType.QUERY).name("page").query(q -> q.model(m -> m.scalarModel(ScalarType.INTEGER))).description("Results page you want to retrieve (0..N)").build());parameters.add(new RequestParameterBuilder().in(ParameterType.QUERY).name("size").query(q -> q.model(m -> m.scalarModel(ScalarType.INTEGER))).description("Number of records per page").build());parameters.add(new RequestParameterBuilder().in(ParameterType.QUERY).name("sort").query(q -> q.model(m -> m.collectionModel(c -> c.model(cm -> cm.scalarModel(ScalarType.STRING))))).description("Sorting criteria in the format: property(,asc|desc). "+ "Default sort order is ascending. "+ "Multiple sort criteria are supported.").build());context.operationBuilder().requestParameters(parameters);}}}@Overridepublic boolean supports(DocumentationType delimiter) {return true;}}

方案一：在Controller分页方法的Pageable参数前添加@ApiIgnore，忽略默认的参数解析：

public ResponseEntity<List<DeviceDTO>> getAllDevices(@ApiIgnore @PageableDefault(sort = {"id"}, direction = Sort.Direction.DESC) Pageable pageable,@RequestParam(required = false) @ApiParam(value = "关键字(序列号,地址,归属单位)") String keyword,

方案二：全局配置，在SwaggerConfig类的createRestApi方法中添加：.ignoredParameterTypes(Pageable.class)

@EnableOpenApi
@Configuration
public class SwaggerConfig {@Beanpublic Docket createRestApi() {return new Docket(DocumentationType.OAS_30).select().apis(RequestHandlerSelectors.basePackage("com.ys.controller")).paths(PathSelectors.any()).build().apiInfo(apiInfo()).ignoredParameterTypes(Pageable.class).pathMapping("/").directModelSubstitute(LocalDate.class, String.class).genericModelSubstitutes(ResponseEntity.class).additionalModels(new TypeResolver().resolve(ErrorMessage.class)).useDefaultResponseMessages(false).securitySchemes(of(authenticationScheme())).securityContexts(of(securityContext())).enableUrlTemplating(false);}

修改后Swagger UI中显示的Pageable参数如下：