后端项目开发：集成接口文档（swagger-ui）

swagger集成文档具有功能丰富、及时更新、整合简单，内嵌于应用的特点。

由于后台管理和前台接口均需要接口文档，所以在工具包构建BaseSwaggerConfig基类。
1.引入依赖

 <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>

2.需要添加Swagger配置类。

/**
 * Swagger基础配置
 */
public abstract class BaseSwaggerConfig {

    @Bean
    public Docket createRestApi() {
        SwaggerProperties swaggerProperties = swaggerProperties();
        Docket docket = new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo(swaggerProperties))
                .select()
                .apis(RequestHandlerSelectors.basePackage(swaggerProperties.getApiBasePackage()))
                .paths(PathSelectors.any())
                .build();
        if (swaggerProperties.isEnableSecurity()) {
            docket.securitySchemes(securitySchemes()).securityContexts(securityContexts());
        }
        return docket;
    }

    private ApiInfo apiInfo(SwaggerProperties swaggerProperties) {
        return new ApiInfoBuilder()
                .title(swaggerProperties.getTitle())
                .description(swaggerProperties.getDescription())
                .contact(new Contact(swaggerProperties.getContactName(), swaggerProperties.getContactUrl(), swaggerProperties.getContactEmail()))
                .version(swaggerProperties.getVersion())
                .build();
    }

    private List<ApiKey> securitySchemes() {
        //设置请求头信息
        List<ApiKey> result = new ArrayList<>();
        ApiKey apiKey = new ApiKey("Authorization", "Authorization", "header");
        result.add(apiKey);
        return result;
    }

    private List<SecurityContext> securityContexts() {
        //设置需要登录认证的路径
        List<SecurityContext> result = new ArrayList<>();
        result.add(getContextByPath("/*/.*"));
        return result;
    }

    private SecurityContext getContextByPath(String pathRegex) {
        return SecurityContext.builder()
                .securityReferences(defaultAuth())
                .forPaths(PathSelectors.regex(pathRegex))
                .build();
    }

    private List<SecurityReference> defaultAuth() {
        List<SecurityReference> result = new ArrayList<>();
        AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        result.add(new SecurityReference("Authorization", authorizationScopes));
        return result;
    }

    /**
     * 自定义Swagger配置
     */
    public abstract SwaggerProperties swaggerProperties();
}

3. 将需要配置的字段提取出来，单独作为一类

/**
 * Swagger自定义配置
 */
@Data
@EqualsAndHashCode(callSuper = false)
@Builder
public class SwaggerProperties {
    /**
     * API文档生成基础路径
     */
    private String apiBasePackage;
    /**
     * 是否要启用登录认证
     */
    private boolean enableSecurity;
    /**
     * 文档标题
     */
    private String title;
    /**
     * 文档描述
     */
    private String description;
    /**
     * 文档版本
     */
    private String version;
    /**
     * 文档联系人姓名
     */
    private String contactName;
    /**
     * 文档联系人网址
     */
    private String contactUrl;
    /**
     * 文档联系人邮箱
     */
    private String contactEmail;
}

4. 前台接口和后台管理的包的配置，只需要继承重写该类就行了

/**
 * Swagger API文档相关配置
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig extends BaseSwaggerConfig {

    @Override
    public SwaggerProperties swaggerProperties() {
        return SwaggerProperties.builder()
                .apiBasePackage("com.example.admin")
                .title("后台管理系统")
                .description("后台相关接口文档")
                .contactName("author")
                .version("1.0")
                .enableSecurity(true)
                .build();
    }
}

接着就可以访问http://localhost:8001/swagger-ui/index.html接口文档页面了，后续可以通过swagger来测试接口。
详细配置参考：https://swagger.io/