新建spring boot项目，并添加swagger相关依赖，完整pom如下：

<?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>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>boot-swagger</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>boot-swagger</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--swagger相关依赖start-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>swagger-bootstrap-ui</artifactId>
            <version>1.9.6</version>
        </dependency>
        <!--swagger相关依赖end-->
        <!--spring-data相关依赖-->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <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>

新建swagger配置类

package com.example.bootswagger.config;

import com.fasterxml.classmate.TypeResolver;
import com.github.xiaoymin.swaggerbootstrapui.annotations.EnableSwaggerBootstrapUI;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.data.domain.Pageable;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.AlternateTypeRule;
import springfox.documentation.schema.AlternateTypeRuleConvention;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author liujy
 * @description swagger配置类
 * @since 2021-01-18 09:54
 */
@EnableSwagger2
@EnableSwaggerBootstrapUI
@Configuration
class SwaggerBootstrapUIConfiguration {
    public static final String basePackage = "com.example.bootswagger";
    public static final String title = "spring boot整合swagger";
    public static final String des = "spring boot整合swagger";

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                // 设置包扫描路径
                .apis(RequestHandlerSelectors.basePackage(basePackage))
                .paths(PathSelectors.any())
                .build();
    }

    @Bean
    public Docket createWebApi() {
        // 创建 Docket 对象
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage(basePackage))
                .paths(PathSelectors.ant("/**/w/**"))
                .build().groupName("Web端API接口文档");
        return docket;
    }

    @Bean
    public Docket createMobileApi() {
        // 创建 Docket 对象
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage(basePackage))
                .paths(PathSelectors.ant("/**/m/**"))
                .build().groupName("Mobile端API接口文档");
        return docket;
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title(title)
                .description(des)
                .version("1.0")
                .build();
    }
    
    /**
     * 将Pageable转换展示在swagger中
     */
    @Bean
    public AlternateTypeRuleConvention pageableConvention(final TypeResolver resolver) {
        return new AlternateTypeRuleConvention() {
            @Override
            public int getOrder() {
                return Ordered.HIGHEST_PRECEDENCE;
            }

            @Override
            public List<AlternateTypeRule> rules() {
                List<AlternateTypeRule> list = new ArrayList<>();
                list.add(new AlternateTypeRule(resolver.resolve(Pageable.class), resolver.resolve(Page.class)));
                return list;
            }
        };
    }

    @ApiModel
    @Getter
    @Setter
    private class Page {
        @ApiModelProperty(value = "请求分页页码 (0..N)", example = "0")
        private Integer page = 0;

        @ApiModelProperty(value = "每页的记录数", example = "10")
        private Integer size = 10;

        @ApiModelProperty(value = "排序格式: property(,asc|desc). 默认是升序 asc. 支持多个排序条件", example = "createdDate,desc")
        private List<String> sort;
    }
}

controller测试类

package com.example.bootswagger.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author liujy
 * @description web测试接口
 * @since 2021-01-18 10:05
 */
@RestController
// 匹配swagger配置类中**/w/**的path配置
@RequestMapping(value = "/web/w")
@Api(tags = {"测试模块-测试控制器"})
public class TestWebController {

    @ApiOperation("这是一个web接口")
    @GetMapping("/t1")
    public String test(@PageableDefault(value = 10, sort = {"createDate"}, direction = Sort.Direction.DESC) final Pageable pageable) {
        return "web interface success";
    }
}

package com.example.bootswagger.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author liujy
 * @description mobile测试接口
 * @since 2021-01-18 11:31
 */
@RestController
// 匹配swagger配置类中**/w/**的path配置
@RequestMapping(value = "/app/m")
@Api(tags = {"测试模块-测试控制器"})
public class TestAppController {

    @ApiOperation("这是一个mobile接口")
    @GetMapping("/t1")
    public String test() {
        return "mobile interface success";
    }
}

项目包结构如图：

项目包结构

访问http://ip:port/swagger-ui.html

访问http://ip:port/doc.html

page信息