详细报错：

今天在使用knife4j整合swagger2聚合微服务文档时报错（其中一个服务）：

Description:  Parameter 0 of constructor in springfox.documentation.swagger.schema.ApiModelPropertyPropertyBuilder required a bean of type 'springfox.documentation.spring.web.DescriptionResolver' that could not be found.   Action:  Consider defining a bean of type 'springfox.documentation.spring.web.DescriptionResolver' in your configuration.

Description:  

Parameter 0 of constructor in springfox.documentation.swagger.schema.ApiModelPropertyPropertyBuilder required a bean of type 'springfox.documentation.spring.web.DescriptionResolver' that could not be found.  

Action:  Consider defining a bean of type 'springfox.documentation.spring.web.DescriptionResolver' in your configuration.

问题代码：

依赖：

<dependency>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>knife4j-micro-spring-boot-starter</artifactId>
    <version>2.0.8</version>
</dependency>
<dependency>
    <groupId>com.spring4all</groupId>
    <artifactId>swagger-spring-boot-starter</artifactId>
</dependency>

knife4j配置：

@Configuration
@EnableSwagger2
@EnableKnife4j
public class Swagger2Config {
    @Bean
    public Docket createRestApi(){
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.et.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("认证授权")
                .description("认证授权API")
                .contact("chen")
                .version("1.0")
                .build();
    }
}

原因分析（不太准确）：

这个错误表明在Spring Boot启动时，无法找到类型为 springfox.documentation.spring.web.DescriptionResolver 的bean。通常情况下，这种错误可能是由于缺少必要的依赖或配置导致的。网上也有另一种说法说springboot版本太高导致，或者依赖冲突导致等，

可以尝试添加依赖，

解决办法：

添加依赖：

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

修改代码：

将ApiInfoBuilder的.contact()方法删除

如以下代码所示：

/**
 * Swagger API相关配置
 */
@Configuration
@EnableSwagger2
@EnableKnife4j
public class Swagger2Config {
    @Bean
    public Docket createRestApi(){
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.et.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("认证授权")
                .description("认证授权API")
                .version("1.0")
                .build();
    }
}

我这里完美解决希望能帮到大家💖