Spring|Spring Boot项目集成Knife4j接口文档的实例代码 SpringBoot项目集成Knife4j接口文档

1、在pom.xml引入依赖包
2、创建Knife4j配置文件
3、使用Knife4j注解
4、全局参数

Knife4j就相当于是swagger的升级版，对于我来说，它比swagger要好用得多

1、在pom.xml引入依赖包

com.github.xiaoyminknife4j-spring-boot-starter2.0.9

2、创建Knife4j配置文件

package com.yuyun.config; import io.swagger.annotations.ApiOperation; import io.swagger.models.auth.In; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import springfox.documentation.builders.ApiInfoBuilder; import springfox.documentation.builders.PathSelectors; import springfox.documentation.builders.RequestHandlerSelectors; import springfox.documentation.service.ApiInfo; import springfox.documentation.service.ApiKey; import springfox.documentation.service.Contact; import springfox.documentation.service.SecurityScheme; import springfox.documentation.spi.DocumentationType; import springfox.documentation.spring.web.plugins.Docket; import springfox.documentation.swagger2.annotations.EnableSwagger2WebMvc; import java.util.ArrayList; import java.util.List; /** * @author hyh */@Configuration@EnableSwagger2WebMvcpublic class Knife4jConfiguration {@Bean(value = "https://www.it610.com/article/defaultApi2")public Docket defaultApi2() {Docket docket = new Docket(DocumentationType.SWAGGER_2)// 是否启用Swagger.enable(true)//分组名称.groupName("1.0版本")// 用来创建该API的基本信息，展示在文档的页面中（自定义展示的信息）.apiInfo(apiInfo())// 设置哪些接口暴露给Swagger展示.select()// 扫描所有有注解的api，用这种方式更灵活.apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))//指定Controller扫描包路径//.apis(RequestHandlerSelectors.basePackage("com.yuyun.controller"))// 扫描所有//.apis(RequestHandlerSelectors.any()).build(); return docket; }private ApiInfo apiInfo() {String name = "雨云"; String url = "https://www.xxx.com/"; String email = "1873591403@qq.com"; Contact contact = new Contact(name, url, email); return new ApiInfoBuilder().title("API接口文档").description("API接口文档描述").termsOfServiceUrl("https://www.xx.com/").contact(contact).version("1.0.1").build(); }}

注意：如果出现错误

Failed to start bean 'documentationPluginsBootstrapper';
 nested exception is java.lang.NullPointerException

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是因为SpringBoot版本高了，将版本降下去或者在application.yml添加如下内容即可解决该错误

spring: mvc:pathmatch:matching-strategy: ant_path_matcher

项目运行后，访问ip+端口号+/doc.html，比如http://localhost:8110/doc.html。效果如图

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3、使用Knife4j注解（1）在实体类中使用
@ApiModel 放在在响应实体类上，用于描述该类
@ApiModelProperty 描述该响应类的属性

/** * 企业信息表 * * @author * @since 1.0.0 2021-12-17 */@Data@ApiModel(value = "https://www.it610.com/article/企业信息表")@TableName("company")public class CompanyDTO implements Serializable {private static final long serialVersionUID = 1L; /*** 主键*/ @ApiModelProperty(value = "https://www.it610.com/article/主键") private Long id; /*** 企业名称*/ @ApiModelProperty(value = "https://www.it610.com/article/企业名称") private String companyName; /*** 简介*/ @ApiModelProperty(value = "https://www.it610.com/article/简介") private String description; }

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（2）在Controller层使用

@RestController@RequestMapping("company")@Api(tags = "企业信息表")public class CompanyController {@Autowiredprivate CompanyService companyService; @GetMapping("getList")@ApiOperation("根据条件获取数据")@ApiImplicitParams({@ApiImplicitParam(name = "id", value = "https://www.it610.com/article/id", paramType = "query", required = true, dataType = "String"),@ApiImplicitParam(name = "name", value = "https://www.it610.com/article/名称", paramType = "query", required = true, dataType = "String")})public Result> getList(@ApiParam(name = "address", value = "https://www.it610.com/article/地址", required = true)String address) {List companyList = companyService.list(); return new Result>().success(companyList); }}

还有其他一些注解，用到再了解

4、全局参数在实际项目中访问接口都添加了权限，每次访问都要带一个请求头参数token。全局参数就是为了方便传一个固定的参数。当添加全局参数后，所有的接口都会带上该参数。
第一种
在配置文件中加入

private List securitySchemes() {List apiKeyList = new ArrayList(); apiKeyList.add(new ApiKey("Authorization", "Authorization", In.HEADER.toValue())); return apiKeyList; }

在defaultApi2()方法内引用

.securitySchemes(securitySchemes())

最后配置文件中的内容：

@Configuration@EnableSwagger2WebMvcpublic class Knife4jConfiguration {@Bean(value = "https://www.it610.com/article/defaultApi2")public Docket defaultApi2() {Docket docket = new Docket(DocumentationType.SWAGGER_2)// 是否启用Swagger.enable(true)//分组名称.groupName("1.0版本")// 用来创建该API的基本信息，展示在文档的页面中（自定义展示的信息）.apiInfo(apiInfo())// 设置哪些接口暴露给Swagger展示.select()// 扫描所有有注解的api，用这种方式更灵活.apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))//指定Controller扫描包路径//.apis(RequestHandlerSelectors.basePackage("com.yuyun.controller"))// 扫描所有//.apis(RequestHandlerSelectors.any()).paths(PathSelectors.any()).build()/* 设置安全模式，swagger可以设置访问token */.securitySchemes(securitySchemes()).securityContexts(securityContexts()).pathMapping("/"); return docket; }private ApiInfo apiInfo() {String name = "雨云"; String url = "https://www.xxx.com/"; String email = "1873591403@qq.com"; Contact contact = new Contact(name, url, email); return new ApiInfoBuilder().title("API接口文档").description("API接口文档描述").termsOfServiceUrl("https://www.xx.com/").contact(contact).version("1.0.1").build(); }/*** 安全模式，这里指定token通过Authorization头请求头传递*/private List securitySchemes() {List apiKeyList = new ArrayList(); apiKeyList.add(new ApiKey("Authorization", "Authorization", "header")); return apiKeyList; }/*** 安全上下文*/private List securityContexts() {List securityContexts = new ArrayList<>(); securityContexts.add(SecurityContext.builder().securityReferences(defaultAuth()).build()); return securityContexts; }/*** 默认的安全上引用*/private List defaultAuth() {AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything"); AuthorizationScope[] authorizationScopes = new AuthorizationScope[1]; authorizationScopes[0] = authorizationScope; List securityReferences = new ArrayList<>(); securityReferences.add(new SecurityReference("Authorization", authorizationScopes)); return securityReferences; }}

效果：菜单上多了一个Authorize，在参数值中添加上信息

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刷新一下，再打开接口就会发现多了个请求头部

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第二种
直接在菜单文档管理→全局参数设置，然后添加参数：

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再打开接口就会发现请求头参数加上了

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源码地址：https://gitee.com/hyh17808770899/spring-boot/tree/master/springboot-03
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