Swagger与Knife4j的学习

Swagger与Knife4j的学习

此教程基于黑马程序员Java品达通用权限项目,哔哩哔哩链接:https://www.bilibili.com/video/BV1tw411f79E?p=30

1.swagger介绍

​ 相信无论是前端还是后端开发,都或多或少地被接口文档折磨过。前端经常抱怨后端给的接口文档与实际情况不一致。后端又觉得编写及维护接口文档会耗费不少精力,经常来不及更新。

​ 其实无论是前端调用后端,还是后端调用后端,都期望有一个好的接口文档。但是这个接口文档对于程序员来说,就跟注释一样,经常会抱怨别人写的代码没有写注释,然而自己写起代码起来,最讨厌的,也是写注释。所以仅仅只通过强制来规范大家是不够的,随着时间推移,版本迭代,接口文档往往很容易就跟不上代码了。

​ 使用Swagger你只需要按照它的规范去定义接口及接口相关的信息。再通过Swagger衍生出来的一系列项目和工具,就可以做到生成各种格式的接口文档,生成多种语言的客户端和服务端的代码,以及在线接口调试页面等等。

​ 这样,如果按照新的开发模式,在开发新版本或者迭代版本的时候,只需要更新Swagger描述文件,就可以自动生成接口文档和客户端服务端代码,做到调用端代码、服务端代码以及接口文档的一致性。

​ 为了简化swagger的使用,Spring框架对swagger进行了整合,建立了Spring-swagger项目,后面改成了现在的Springfox。通过在项目中引入Springfox,可以扫描相关的代码,生成描述文件,进而生成与代码一致的接口文档和客户端代码。

Springfox对应的maven坐标如下:

<dependency>
    <groupId>io.springfoxgroupId>
    <artifactId>springfox-swagger-uiartifactId>
    <version>2.9.2version>
dependency>
<dependency>
    <groupId>io.springfoxgroupId>
    <artifactId>springfox-swagger2artifactId>
    <version>2.9.2version>
dependency>

2.swagger常用注解

注解 说明
@Api 用在请求的类上,例如Controller,表示对类的说明
@ApiModel 用在类上,通常是实体类,表示一个返回响应数据的信息
@ApiModelProperty 用在属性上,描述响应类的属性
@ApiOperation 用在请求的方法上,说明方法的用途、作用
@ApiImplicitParams 用在请求的方法上,表示一组参数说明
@ApiImplicitParam 用在@ApiImplicitParams注解中,指定一个请求参数的各个方面

3.swagger入门案例

第一步:创建maven工程swagger_demo并配置pom.xml文件


<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>4.0.0modelVersion>
	<parent>
		<groupId>org.springframework.bootgroupId>
		<artifactId>spring-boot-starter-parentartifactId>
		<version>2.2.2.RELEASEversion>
		<relativePath/>
	parent>
	<groupId>cn.itcastgroupId>
	<artifactId>swagger_demoartifactId>
	<version>0.0.1-SNAPSHOTversion>
	<name>swagger_demoname>
	<description>Demo project for Spring Bootdescription>
	<properties>
		<java.version>1.8java.version>
	properties>
	
    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        
        <dependency>
            <groupId>io.springfoxgroupId>
            <artifactId>springfox-swagger-uiartifactId>
            <version>2.9.2version>
        dependency>
        
        <dependency>
            <groupId>io.springfoxgroupId>
            <artifactId>springfox-swagger2artifactId>
            <version>2.9.2version>
        dependency>
        
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>
    dependencies>
    
project>

第二步:创建application.yml文件

server:
  port: 9000

第三步: 创建实体类User和Menu

package cn.itcast.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data
// @ApiModel用在类上,通常是实体类,表示一个返回响应数据的信息
@ApiModel(description = "用户实体")
public class User {
    // @ApiModelProperty用在属性上,描述响应类的属性
    @ApiModelProperty(value = "主键")
    private int id;
    
    @ApiModelProperty(value = "姓名")
    private String name;
    
    @ApiModelProperty(value = "年龄")
    private int age;
    
    @ApiModelProperty(value = "地址")
    private String address;
}

package cn.itcast.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data
// @ApiModel用在类上,通常是实体类,表示一个返回响应数据的信息
@ApiModel(description = "菜单实体")
public class Menu {
    // @ApiModelProperty用在属性上,描述响应类的属性
    @ApiModelProperty(value = "主键")
    private int id;
    
    @ApiModelProperty(value = "菜单名称")
    private String name;
}

第四步:创建UserController和MenuController

package cn.itcast.controller.user;

import cn.itcast.entity.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/user")
// @Api用在请求的类上,例如Controller,表示对类的说明
@Api(tags = "用户控制器")
public class UserController {
    @GetMapping("/getUsers")
    // @ApiOperation用在请求的方法上,说明方法的用途、作用
    @ApiOperation(value = "查询所有用户", notes = "查询所有用户信息")
    public List<User> getAllUsers(){
        User user = new User();
        user.setId(100);
        user.setName("itcast");
        user.setAge(20);
        user.setAddress("bj");
        List<User> list = new ArrayList<>();
        list.add(user);
        return list;
    }

    @PostMapping("/save")
    @ApiOperation(value = "新增用户", notes = "新增用户信息")
    public String save(@RequestBody User user){
        return "OK";
    }

    @PutMapping("/update")
    @ApiOperation(value = "修改用户", notes = "修改用户信息")
    public String update(@RequestBody User user){
        return "OK";
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除用户", notes = "删除用户信息")
    public String delete(int id){
        return "OK";
    }

    // @ApiImplicitParams用在请求的方法上,表示一组参数说明,此处表示对pageNum和pageSize这两个参数进行说明
    @ApiImplicitParams({
            // @ApiImplicitParam用在@ApiImplicitParams注解中,指定一个请求参数的各个方面
            @ApiImplicitParam(name = "pageNum", value = "页码",
                    required = true, type = "Integer"),
            @ApiImplicitParam(name = "pageSize", value = "每页条数",
                    required = true, type = "Integer"),
    })
    @ApiOperation(value = "分页查询用户信息")
    @GetMapping(value = "page/{pageNum}/{pageSize}")
    public String findByPage(@PathVariable Integer pageNum,
                             @PathVariable Integer pageSize) {
        return "OK";
    }
}

package cn.itcast.controller.menu;

import cn.itcast.entity.Menu;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/menu")
@Api(tags = "菜单控制器")
public class MenuController {
    @GetMapping("/getMenus")
    @ApiOperation(value = "查询所有菜单", notes = "查询所有菜单信息")
    public List<Menu> getMenus(){
        Menu menu = new Menu();
        menu.setId(100);
        menu.setName("itcast");
        List<Menu> list = new ArrayList<>();
        list.add(menu);
        return list;
    }

    @PostMapping("/save")
    @ApiOperation(value = "新增菜单", notes = "新增菜单信息")
    public String save(@RequestBody Menu menu){
        return "OK";
    }

    @PutMapping("/update")
    @ApiOperation(value = "修改菜单", notes = "修改菜单信息")
    public String update(@RequestBody Menu menu){
        return "OK";
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除菜单", notes = "删除菜单信息")
    public String delete(int id){
        return "OK";
    }

    @ApiImplicitParams({
            @ApiImplicitParam(name = "pageNum", value = "页码",
                    required = true, type = "Integer"),
            @ApiImplicitParam(name = "pageSize", value = "每页条数",
                    required = true, type = "Integer"),
    })
    @ApiOperation(value = "分页查询菜单信息")
    @GetMapping(value = "page/{pageNum}/{pageSize}")
    public String findByPage(@PathVariable Integer pageNum,
                             @PathVariable Integer pageSize) {
        return "OK";
    }
}

第五步:创建配置类SwaggerAutoConfiguration

package cn.itcast.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
public class SwaggerAutoConfiguration {
    // 用户接口组
    // Docket表示接口文档,用于封装接口文档相关信息(如记录扫描哪些包、文档名字、文档信息等)
    @Bean
    public Docket createRestApi1() {
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                // groupName : 接口文档组名字
                .apiInfo(apiInfo()).groupName("用户接口组")
                .select()
                // basePackage 表示扫描那个包
                .apis(RequestHandlerSelectors.basePackage("cn.itcast.controller.user"))
                .build();
        return docket;
    }

    // 菜单接口组
    @Bean
    public Docket createRestApi2() {
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo()).groupName("菜单接口组")
                .select()
                //为当前包路径
                .apis(RequestHandlerSelectors.basePackage("cn.itcast.controller.menu"))
                .build();
        return docket;
    }

    //构建 api文档的详细信息
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //页面标题
                .title("API接口文档")
                //创建人
                .contact(new Contact("黑马程序员", "http://www.itheima.com", ""))
                //版本号
                .version("1.0")
                //描述
                .description("API 描述")
                .build();
    }
}

第六步:创建启动类SwaggerDemoApplication

package cn.itcast;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
// 启用swagger
@EnableSwagger2
public class SwaggerDemoApplication {
	public static void main(String[] args) {
		SpringApplication.run(SwaggerDemoApplication.class, args);
	}
}

执行启动类main方法启动项目,访问地址:http://localhost:9000/swagger-ui.html

Swagger与Knife4j的学习_第1张图片

之后我们可以在swagger中进行调试,以删除用户为例,

Swagger与Knife4j的学习_第2张图片

这样,前后端人员就可以基于这份接口文档对系统进行开发、调试。

补充:如果我们不想要对接口文档进行分组的话,改造一下SwaggerAutoConfiguration即可,代码如下

package cn.itcast.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
public class SwaggerAutoConfiguration {
    // 用户接口组
    // Docket表示接口文档,用于封装接口文档相关信息(如记录扫描哪些包、文档名字、文档信息等)
    @Bean
    public Docket createRestApi1() {
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                // groupName : 接口文档组名字
                .apiInfo(apiInfo())
                .select()
                // basePackage 表示扫描那个包
                .apis(RequestHandlerSelectors.basePackage("cn.itcast.controller"))
                .build();
        return docket;
    }
    

    //构建 api文档的详细信息
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //页面标题
                .title("API接口文档")
                //创建人
                .contact(new Contact("黑马程序员", "http://www.itheima.com", ""))
                //版本号
                .version("1.0")
                //描述
                .description("API 描述")
                .build();
    }
}

重启项目,发现已经不分组了,输入http://localhost:9000/swagger-ui.html

Swagger与Knife4j的学习_第3张图片

4.knife4j介绍

knife4j是为Java MVC框架集成Swagger生成Api文档的增强解决方案,前身是swagger-bootstrap-ui,取名knife4j是希望它能像一把匕首一样小巧、轻量,并且功能强悍。其底层是对Springfox的封装,使用方式也和Springfox一致,只是对接口文档UI进行了优化。

核心功能

  • 文档说明:根据Swagger的规范说明,详细列出接口文档的说明,包括接口地址、类型、请求示例、请求参数、响应示例、响应参数、响应码等信息,对该接口的使用情况一目了然。

  • 在线调试:提供在线接口联调的强大功能,自动解析当前接口参数,同时包含表单验证,调用参数可返回接口响应内容、headers、响应时间、响应状态码等信息,帮助开发者在线调试。

5.knife4j入门案例

第一步:创建maven工程knife4j_demo并配置pom.xml文件


<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 
                             http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.2.2.RELEASEversion>
        <relativePath/>
    parent>
    <groupId>cn.itcastgroupId>
    <artifactId>knife4j_demoartifactId>
    <version>1.0-SNAPSHOTversion>
   
    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        
        <dependency>
            <groupId>com.github.xiaoymingroupId>
            <artifactId>knife4j-spring-boot-starterartifactId>
            <version>2.0.1version>
        dependency>
        
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>
    dependencies>
    
project>

我们通过查看依赖关系发现,knife4j内部已经集成了springfox-swagger2

Swagger与Knife4j的学习_第4张图片

第二步: 创建实体类User和Menu

package cn.itcast.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data
@ApiModel(description = "用户实体")
public class User {
    @ApiModelProperty(value = "主键")
    private int id;
    @ApiModelProperty(value = "姓名")
    private String name;
    @ApiModelProperty(value = "年龄")
    private int age;
    @ApiModelProperty(value = "地址")
    private String address;
}
package cn.itcast.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data
@ApiModel(description = "菜单实体")
public class Menu {
    @ApiModelProperty(value = "主键")
    private int id;
    @ApiModelProperty(value = "菜单名称")
    private String name;
}

第三步:创建UserController和MenuController

package cn.itcast.controller.user;

import cn.itcast.entity.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/user")
@Api(tags = "用户控制器")
public class UserController {
    @GetMapping("/getUsers")
    @ApiOperation(value = "查询所有用户", notes = "查询所有用户信息")
    public List<User> getAllUsers(){
        User user = new User();
        user.setId(100);
        user.setName("itcast");
        user.setAge(20);
        user.setAddress("bj");
        List<User> list = new ArrayList<>();
        list.add(user);
        return list;
    }

    @PostMapping("/save")
    @ApiOperation(value = "新增用户", notes = "新增用户信息")
    public String save(@RequestBody User user){
        return "OK";
    }

    @PutMapping("/update")
    @ApiOperation(value = "修改用户", notes = "修改用户信息")
    public String update(@RequestBody User user){
        return "OK";
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除用户", notes = "删除用户信息")
    public String delete(int id){
        return "OK";
    }

    @ApiImplicitParams({
   		@ApiImplicitParam(name = "pageNum", value = "页码", 
                       required = true, type = "Integer"),
    	@ApiImplicitParam(name = "pageSize", value = "每页条数", 
                       required = true, type = "Integer"),
    })
    @ApiOperation(value = "分页查询用户信息")
    @GetMapping(value = "page/{pageNum}/{pageSize}")
    public String findByPage(@PathVariable Integer pageNum,
                             @PathVariable Integer pageSize) {
        return "OK";
    }
}
package cn.itcast.controller.menu;

import cn.itcast.entity.Menu;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/menu")
@Api(tags = "菜单控制器")
public class MenuController {
    @GetMapping("/getMenus")
    @ApiOperation(value = "查询所有菜单", notes = "查询所有菜单信息")
    public List<Menu> getMenus(){
        Menu menu = new Menu();
        menu.setId(100);
        menu.setName("itcast");
        List<Menu> list = new ArrayList<>();
        list.add(menu);
        return list;
    }

    @PostMapping("/save")
    @ApiOperation(value = "新增菜单", notes = "新增菜单信息")
    public String save(@RequestBody Menu menu){
        return "OK";
    }

    @PutMapping("/update")
    @ApiOperation(value = "修改菜单", notes = "修改菜单信息")
    public String update(@RequestBody Menu menu){
        return "OK";
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除菜单", notes = "删除菜单信息")
    public String delete(int id){
        return "OK";
    }

    @ApiImplicitParams({
    	@ApiImplicitParam(name = "pageNum", value = "页码", 
                         required = true, type = "Integer"),
    	@ApiImplicitParam(name = "pageSize", value = "每页条数", 
                         required = true, type = "Integer"),
    })
    @ApiOperation(value = "分页查询菜单信息")
    @GetMapping(value = "page/{pageNum}/{pageSize}")
    public String findByPage(@PathVariable Integer pageNum,
                             @PathVariable Integer pageSize) {
        return "OK";
    }
}

第四步:创建配置属性类SwaggerProperties,相比于之前我们对swagger的直接在配置文件中写死,这样可以对接口文档进行灵活的配置,这样我们直接可以通过在application.yml中进行接口文档的配置分组以及不分组。

package cn.itcast.config;

import lombok.*;
import org.springframework.boot.context.properties.ConfigurationProperties;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/*
*配置属性类,用于封装接口文档相关属性,从配置文件读取信息封装成当前对象
*/

@Data
@ConfigurationProperties(prefix = "pinda.swagger")
public class SwaggerProperties {
    private String title = "在线文档"; //标题
    private String group = ""; //自定义组名
    private String description = "在线文档"; //描述
    private String version = "1.0"; //版本
    private Contact contact = new Contact(); //联系人
    private String basePackage = "com.itheima.pinda"; //swagger会解析的包路径
    private List<String> basePath = new ArrayList<>(); //swagger会解析的url规则
    private List<String> excludePath = new ArrayList<>();//在basePath基础上需要排除的url规则
    private Map<String, DocketInfo> docket = new LinkedHashMap<>(); //分组文档
	public String getGroup() {
        if (group == null || "".equals(group)) {
            return title;
        }
        return group;
    }
    @Data
    public static class DocketInfo {
        private String title = "在线文档"; //标题
        private String group = ""; //自定义组名
        private String description = "在线文档"; //描述
        private String version = "1.0"; //版本
        private Contact contact = new Contact(); //联系人
        private String basePackage = ""; //swagger会解析的包路径
        private List<String> basePath = new ArrayList<>(); //swagger会解析的url规则
        private List<String> excludePath = new ArrayList<>();//在basePath基础上需要排除的url
        public String getGroup() {
            if (group == null || "".equals(group)) {
                return title;
            }
            return group;
        }
    }
    @Data
    public static class Contact {
        private String name = "pinda"; //联系人
        private String url = ""; //联系人url
        private String email = ""; //联系人email
    }
}

第五步:创建application.yml文件

server:
  port: 7788
pinda:
  swagger:
    title: 接口文档
    description: 这是接口文档
    version: 1.0
    enabled: true #是否启用swagger
    docket: # 对接口文档进行分组,不写则不进行分组,我们在SwaggerProperties定义docket为Map
      user:   # user接口文档组
        title: 用户模块
        group: 用户模块组
        base-package: cn.itcast.controller.user
      menu:   # menu接口文档组
        title: 菜单模块
        group: 菜单模块组
        base-package: cn.itcast.controller.menu

第六步:创建配置类SwaggerAutoConfiguration

package cn.itcast.config;

import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RequestMethod;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
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.LinkedList;
import java.util.List;

@Configuration
// swagger开关,这里表示pinda.swagger.enabled为true,即我们在application.yml中配置pinda.swagger.enabled: true才会启用,
// matchIfMissing = true 表示不写则默认为true
@ConditionalOnProperty(name = "pinda.swagger.enabled", havingValue = "true",
        matchIfMissing = true)
// 启用swagger
@EnableSwagger2
// 指定配置属性类
@EnableConfigurationProperties(SwaggerProperties.class)
public class SwaggerAutoConfiguration implements BeanFactoryAware {
    @Autowired
    SwaggerProperties swaggerProperties;

    private BeanFactory beanFactory;

    @Bean
    @ConditionalOnMissingBean
    // 接口文档不分组则list为1个,分组则为多个
    public List<Docket> createRestApi(){
        // 强转为可配置的bean工厂
        ConfigurableBeanFactory configurableBeanFactory = (ConfigurableBeanFactory) beanFactory;
        List<Docket> docketList = new LinkedList<>();
        // 没有分组
        if (swaggerProperties.getDocket().isEmpty()) {
            Docket docket = createDocket(swaggerProperties);
            // 注册为单例对象,通过bean工厂来进行管理,使用title作为key,value为docket接口文档对象
            configurableBeanFactory.registerSingleton(swaggerProperties.getTitle(), docket);
            docketList.add(docket);
            return docketList;
        }
        // 分组创建,遍历
        for (String groupName : swaggerProperties.getDocket().keySet()){
            SwaggerProperties.DocketInfo docketInfo = swaggerProperties.getDocket().get(groupName);
            ApiInfo apiInfo = new ApiInfoBuilder()
                    //页面标题
                    .title(docketInfo.getTitle())
                    //创建人
                    .contact(new Contact(docketInfo.getContact().getName(),
                            docketInfo.getContact().getUrl(),
                            docketInfo.getContact().getEmail()))
                    //版本号
                    .version(docketInfo.getVersion())
                    //描述
                    .description(docketInfo.getDescription())
                    .build();

            // base-path处理
            // 当没有配置任何path的时候,解析/**
            if (docketInfo.getBasePath().isEmpty()) {
                docketInfo.getBasePath().add("/**");
            }
            List<Predicate<String>> basePath = new ArrayList<>();
            for (String path : docketInfo.getBasePath()) {
                basePath.add(PathSelectors.ant(path));
            }

            // exclude-path处理,
            List<Predicate<String>> excludePath = new ArrayList<>();
            for (String path : docketInfo.getExcludePath()) {
                excludePath.add(PathSelectors.ant(path));
            }

            Docket docket = new Docket(DocumentationType.SWAGGER_2)
                    .apiInfo(apiInfo)
                    .groupName(docketInfo.getGroup())
                    .select()
                    //为当前包路径
                    .apis(RequestHandlerSelectors.basePackage(docketInfo.getBasePackage()))
                    .paths(Predicates.and(Predicates.not(Predicates.or(excludePath)),Predicates.or(basePath)))
                    .build();
            // 注册为单例对象,通过bean工厂来进行管理,使用title作为key,value为docket接口文档对象
            configurableBeanFactory.registerSingleton(groupName, docket);
            // 添加
            docketList.add(docket);
        }
        return docketList;
    }

    //构建 api文档的详细信息
    private ApiInfo apiInfo(SwaggerProperties swaggerProperties) {
        return new ApiInfoBuilder()
                //页面标题
                .title(swaggerProperties.getTitle())
                //创建人
                .contact(new Contact(swaggerProperties.getContact().getName(),
                        swaggerProperties.getContact().getUrl(),
                        swaggerProperties.getContact().getEmail()))
                //版本号
                .version(swaggerProperties.getVersion())
                //描述
                .description(swaggerProperties.getDescription())
                .build();
    }

    //创建接口文档对象
    private Docket createDocket(SwaggerProperties swaggerProperties) {
        //API 基础信息
        ApiInfo apiInfo = apiInfo(swaggerProperties);

        // base-path处理
        // 当没有配置任何path的时候,解析/**
        if (swaggerProperties.getBasePath().isEmpty()) {
            swaggerProperties.getBasePath().add("/**");
        }
        List<Predicate<String>> basePath = new ArrayList<>();
        for (String path : swaggerProperties.getBasePath()) {
            basePath.add(PathSelectors.ant(path));
        }

        // exclude-path处理
        List<Predicate<String>> excludePath = new ArrayList<>();
        for (String path : swaggerProperties.getExcludePath()) {
            excludePath.add(PathSelectors.ant(path));
        }

        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo)
                .groupName(swaggerProperties.getGroup())
                .select()
                .apis(RequestHandlerSelectors.basePackage(swaggerProperties.getBasePackage()))
                .paths(Predicates.and(Predicates.not(Predicates.or(excludePath)),Predicates.or(basePath)))
                .build();
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        // 获取bean工厂对象
        this.beanFactory = beanFactory;
    }
}

第七步:创建启动类SwaggerDemoApplication

package cn.itcast;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SwaggerDemoApplication {
	public static void main(String[] args) {
		SpringApplication.run(SwaggerDemoApplication.class, args);
	}
}

执行启动类main方法启动项目,访问地址:http://localhost:7788/doc.html

Swagger与Knife4j的学习_第5张图片

之后我们可以对api接口进行调试,如删除用户调试,

Swagger与Knife4j的学习_第6张图片

如果接口文档不分组,我们可以修改application.yml文件:

server:
  port: 7788
pinda:
  swagger:
    enabled: true #是否启用swagger
    title: test模块
    base-package: cn.itcast.controller

再次访问地址:http://localhost:7788/doc.html

Swagger与Knife4j的学习_第7张图片

可以看到所有的接口在一个分组中。

6.定制starter

我们可以将我们的接口文档定制为一个starter,这样其他项目需要使用的话直接引入即可。

starter模块的定制可以参考b站链接:https://www.bilibili.com/video/BV1tw411f79E?p=43&spm_id_from=pageDriver,此处我们不做过多叙述

7.使用starter

通过上面的入门案例我们已经完成了接口文档的相关开发,而pd-tools-swagger2模块就是使用这种方式开发的,并且按照Spring boot starter的规范在/resources/META-INF中提供spring.factories文件,内容如下:

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
    com.itheima.pinda.swagger2.SwaggerAutoConfiguration

这样我们在其他模块中如果需要使用swagger接口文档功能,只需要引入这个starter并且在application.yml中进行swagger的相关配置即可,例如:

pinda:
  swagger:
    enabled: true #是否启用swagger
    docket:
      user:
        title: 用户模块
        base-package: cn.itcast.controller.user
      menu:
        title: 菜单模块
        base-package: cn.itcast.controller.menu

具体使用过程:

第一步:创建maven工程mySwaggerApp并配置pom.xml


<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.2.2.RELEASEversion>
        <relativePath/>
    parent>
    <groupId>com.itheimagroupId>
    <artifactId>mySwaggerAppartifactId>
    <version>1.0-SNAPSHOTversion>
    <dependencies>
        
        <dependency>
            <groupId>com.itheimagroupId>
            <artifactId>pd-tools-swagger2artifactId>
            <version>1.0-SNAPSHOTversion>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>
    dependencies>
project>

第二步:创建User实体类

package com.itheima.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data
@ApiModel(description = "用户实体")
public class User {
    @ApiModelProperty(value = "主键")
    private int id;
    @ApiModelProperty(value = "姓名")
    private String name;
    @ApiModelProperty(value = "年龄")
    private int age;
    @ApiModelProperty(value = "地址")
    private String address;
}

第三步:创建UserController

package com.itheima.controller;

import com.itheima.entity.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/user")
@Api(tags = "用户控制器")
public class UserController {
    @GetMapping("/getUsers")
    @ApiOperation(value = "查询所有用户", notes = "查询所有用户信息")
    public List<User> getAllUsers(){
        User user = new User();
        user.setId(100);
        user.setName("itcast");
        user.setAge(20);
        user.setAddress("bj");
        List<User> list = new ArrayList<>();
        list.add(user);
        return list;
    }

    @PostMapping("/save")
    @ApiOperation(value = "新增用户", notes = "新增用户信息")
    public String save(@RequestBody User user){
        return "OK";
    }

    @PutMapping("/update")
    @ApiOperation(value = "修改用户", notes = "修改用户信息")
    public String update(@RequestBody User user){
        return "OK";
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除用户", notes = "删除用户信息")
    public String delete(int id){
        return "OK";
    }

    @ApiImplicitParams({
            @ApiImplicitParam(name = "pageNum", value = "页码",
                    required = true, type = "Integer"),
            @ApiImplicitParam(name = "pageSize", value = "每页条数",
                    required = true, type = "Integer"),
    })
    @ApiOperation(value = "分页查询用户信息")
    @GetMapping(value = "page/{pageNum}/{pageSize}")
    public String findByPage(@PathVariable Integer pageNum,
                             @PathVariable Integer pageSize) {
        return "OK";
    }
}

第四步:创建application.yml

server:
  port: 8080
pinda:
  swagger:
    enabled: true
    title: 在线接口文档
    base-package: com.itheima.controller

第五步:创建启动类

package com.itheima;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MySwaggerApplication {
    public static void main(String[] args) {
        SpringApplication.run(MySwaggerApplication.class,args);
    }
}

启动项目,访问地址:http://localhost:8080/doc.html

Swagger与Knife4j的学习_第8张图片

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