SpringBoot3中Swagger整合knife4j和springdoc的配置说明

 

springboot3开始javax包改成了jakarta,而swagger-oas等包中依然使用的是javax所以报错。另外springfox已经过时了,两年没更新了,并且不支持OpenAPI3 标准,而SpringBoot3只支持OpenAPI3规范,所以要迁移到springdoc

Knife4J是一款基于Swagger快速生成API文档和调试平台的开源工具,它可以轻松地将Swagger规范转换成易于阅读的文档,并支持在线测试API。Knife4J内置了多种主题和插件,提供了丰富的样式和功能配置,可以自定义API文档的展示方式和内容。

OpenAPI3的规范,目前针对Java的Spring Boot项目,主要支持的有2个版本
  • springfox 3.0.0: 同时兼容OpenAPI2以及OpenAPI3,但是停更很久了
  • springdoc-openapi:兼容OpenAPI3规范,更新速度频繁
Knife4j在只有的OpenAPI3规范中,底层基础框架选择springdoc-openapi项目
  • 针对Springfox3.0.0版本会放弃。

 

Spring Boot版本兼容性

以下是一些常见的Spring Boot版本及其对应的Knife4j版本兼容推荐:

Spring Boot版本 Knife4j Swagger2规范 Knife4j OpenAPI3规范
1.5.x~2.0.0 <Knife4j 2.0.0 >=Knife4j 4.0.0
2.0~2.2 Knife4j 2.0.0 ~ 2.0.6 >=Knife4j 4.0.0
2.2.x~2.4.0 Knife4j 2.0.6 ~ 2.0.9 >=Knife4j 4.0.0
2.4.0~2.7.x >=Knife4j 4.0.0 >=Knife4j 4.0.0
>= 3.0 >=Knife4j 4.0.0 >=Knife4j 4.0.0

参考:knife4j官网 springdoc-openapi官网

配置: JDK17 + SpringBoot:3.1.5 + knife4j:4.3.0 + springdoc2.2.0

 

1.导入依赖(SpringBoot3)
 <!--基于knife4j-openapi3的api接口文档生成-->
<dependency>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>knife4j-openapi3-jakarta-spring-boot-starter</artifactId>
    <version>4.3.0</version>
</dependency>
2.在application.yml中设置相关配置:
#springdoc相关配置
springdoc:
  swagger-ui:
    #自定义swagger前端请求路径,输入http:127.0.0.1:8080/swagger-ui.html会自动重定向到swagger页面
    path: /swagger-ui.html
    tags-sorter: alpha
    operations-sorter: alpha
  api-docs:
    path: /v3/api-docs    #swagger后端请求地址
    enabled: true   #是否开启文档功能
  group-configs:
    - group: 'com.hgh.yuzhan'
      paths-to-match: '/**'
      packages-to-scan: com.hgh.yuzhan    #按包路径匹配:一般到启动类的包名

#knife4j相关配置 可以不用改
knife4j:
  enable: true    #开启knife4j,无需添加@EnableKnife4j注解
  setting:
    language: zh_cn   #中文
    swagger-model-name: 实体类   #重命名SwaggerModel名称,默认
  #开启SwaggerBasic认证功能,默认是false
  basic:
    enable: true
    # Basic认证用户名
    username: hgh
    # Basic认证密码
    password: a1234567
3.配置文件
/**
 * @description: knife4j配置类
 * @authod:  GreyPigeon mail:2371849349@qq.com
 * @date:    2023/11/10 20:49
 **/
@Configuration
public class OpenApiConfig {

    @Bean
    public OpenAPI springShopOpenAPI() {
        return new OpenAPI()
                // 接口文档标题
                .info(new Info().title("愈站API接口文档")
                        // 接口文档简介
                        .description("这是基于Knife4j OpenApi3的接口文档")
                        // 接口文档版本
                        .version("v1.0")
                        // 开发者联系方式
                        .contact(new Contact().name("GrayPigeonHGH").email("2371849349@qq.com")))
                .externalDocs(new ExternalDocumentation()
                        .description("SpringBoot基础框架")
                        .url("http://127.0.0.1:8088"));
    }

    //以下分组可省略
    @Bean
    public GroupedOpenApi systemApi() {
        return GroupedOpenApi.builder().group("System系统模块")
                .pathsToMatch("/system/**")
                .build();
    }

    @Bean
    public GroupedOpenApi authApi() {
        return GroupedOpenApi.builder().group("Auth权限模块")
                .pathsToMatch("/captcha", "/login")
                .build();
    }
}

参考:https://huaweicloud.csdn.net/63876baddacf622b8df8bb31.html

  • 注意:Knife4j 自4.0版本,下面的配置在knife4j-openapi2-spring-boot-starter中仍然需要如此配置,而在knife4j-openapi3-spring-boot-starterknife4j-openapi3-jakarta-spring-boot-starter则不需要以下配置!!!
@Configuration
@EnableSwagger2WebMvc
public class SwaggerConfiguration {

    /*引入Knife4j提供的扩展类*/
   private final OpenApiExtensionResolver openApiExtensionResolver;

    @Autowired
    public SwaggerConfiguration(OpenApiExtensionResolver openApiExtensionResolver) {
        this.openApiExtensionResolver = openApiExtensionResolver;
    }

@Bean(value = "defaultApi2")
    public Docket defaultApi2() {
        String groupName="2.X版本";
        Docket docket=new Docket(DocumentationType.SWAGGER_2)
                .host("https://www.cssjc.com")
                .apiInfo(apiInfo())
                .groupName(groupName)
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.swagger.bootstrap.ui.demo.new2"))
                .paths(PathSelectors.any())
                .build()
                //赋予插件体系
                .extensions(openApiExtensionResolver.buildExtensions(groupName));
        return docket;
    }
4.访问路径

swagger 接口文档默认地址:http://localhost:8080/swagger-ui.html#

Knife4j 接口文档默认地址:http://127.0.0.1:8080/doc.html

5. Springfox改用Springdoc后,注解改变:
@Api@Tag

@ApiIgnore@Parameter(hidden = true) or @Operation(hidden = true) or @Hidden

@ApiImplicitParam@Parameter

@ApiImplicitParams@Parameters

@ApiModel@Schema

@ApiModelProperty(hidden = true)@Schema(accessMode = READ_ONLY)

@ApiModelProperty@Schema

@ApiOperation(value = "foo", notes = "bar")@Operation(summary = "foo", description = "bar")

@ApiParam@Parameter

@ApiResponse(code = 404, message = "foo")@ApiResponse(responseCode = "404", description = "foo")
6.以下举几个简单的例子:
6.1 Controller:
@Tag(name = "用户接口")
@RestController
@RequestMapping("sys/user")
public class SysUserController {

    @Resource
    private ISysUserService sysUserService;

    @Operation(summary = "分页查询")
    @GetMapping("page")
    public AjaxResult queryPage(@ParameterObject SysUserPageDTO dto) {
        PageInfo page = sysUserService.queryPage(dto);
        return AjaxResult.success(page);
    }

    @Operation(summary = "详情")
    @GetMapping("{id}")
    public AjaxResult queryInfo(@PathVariable Long id) {
        SysUserDTO dto = sysUserService.queryById(id);
        return AjaxResult.success(dto);
    }

    @Operation(summary = "新增")
    @PostMapping
    public AjaxResult save(@RequestBody SysUserDTO dto) {
        Long id = sysUserService.saveInfo(dto);
        return AjaxResult.success(id);
    }
}
6.2 实体类
@Getter
@Setter
@TableName("user")
@Schema(name = "User", description = "$!{table.comment}")
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    @Schema(description = "主键")
    @TableId("id")
    private Long id;

    @Schema(description = "用户名")
    @TableField("name")
    private String name;

    @Schema(description = "手机号")
    @TableField("phone")
    private String phone;

    @Schema(description = "性别")
    @TableField("sex")
    private String sex;

    @Schema(description = "状态 0:禁用,1:正常")
    @TableField("status")
    private Integer status;
}
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