前言

为了完成项目自带文档的需求，花了一定的时间研究Spring Boot集成Swagger。看了官方文档和一些博客，差不多搭出一个比较通用的架子。

文末会分享出案例项目。

基本概述

本文使用Spring Boot+Spring Fox的方式集成Swagger框架。

案例

引入依赖

<properties>
    <swagger.version>2.7.0</swagger.version>
</properties>
<dependencies>
    <!-- swagger2 -->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>${swagger.version}</version>
    </dependency>
    <!-- swagger2 ui -->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>${swagger.version}</version>
    </dependency>
</dependencies>

Swagger配置

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.switchvov.swagger"))
                .paths(PathSelectors.any())
                .build()
                .securitySchemes(securitySchemes())
                .securityContexts(securityContexts());
    }

    /**
     * 配置认证模式
     */
    private List<ApiKey> securitySchemes() {
        return newArrayList(new ApiKey("Authorization", "Authorization", "header"));
    }

    /**
     * 配置认证上下文
     */
    private List<SecurityContext> securityContexts() {
        return newArrayList(SecurityContext.builder()
                .securityReferences(defaultAuth())
                .forPaths(PathSelectors.any())
                .build());
    }

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

    /**
     * 项目信息
     */
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("Swagger测试项目 RESTful APIs")
                .version("1.0")
                .build();
    }
}

配置方式

基本概述

Swagger官方Wiki 注解
swagger2常用注解说明
swagger注释API详细说明

PS：以上几篇文章已经将Swagger注解的使用方式及作用阐述的非常清楚了。这里只给出代码案例。

PS：springfox-swagger2:2.7.0已经支持泛型返回对象。
<font color='red'>注意：千万不要在@ApiOperation注解里限定response()，让框架推断类型就行了。</font>

控制器

@RestController
@RequestMapping(value = "/user", produces = "application/json")
@Api(value = "User", tags = {"User"}, description = "用户相关")
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping("/{id}")
    @ApiOperation(value = "使用ID查询用户")
    @ApiImplicitParams({
            @ApiImplicitParam(value = "ID", name = "id", dataType = "int", paramType = "path", required = true, defaultValue = "1")
    })
    @ApiResponses({
            @ApiResponse(code = 400, message = "请求参数有误"),
            @ApiResponse(code = 401, message = "未授权"),
            @ApiResponse(code = 403, message = "禁止访问"),
            @ApiResponse(code = 404, message = "请求路径不存在"),
            @ApiResponse(code = 500, message = "服务器内部错误")
    })
    public ResponseResult<User> getById(@PathVariable("id") Integer id) {
        User user = userService.getById(id);
        return ResponseResult.successWithData(user);
    }

    @PostMapping("")
    @ApiOperation(value = "创建用户")
    @ApiResponses({
            @ApiResponse(code = 400, message = "请求参数有误"),
            @ApiResponse(code = 401, message = "未授权"),
            @ApiResponse(code = 403, message = "禁止访问"),
            @ApiResponse(code = 404, message = "请求路径不存在"),
            @ApiResponse(code = 500, message = "服务器内部错误")
    })
    public ResponseResult<User> createUser(@Validated @RequestBody User user) {
        User dbUser = userService.createUser(user);
        return ResponseResult.successWithData(dbUser);
    }
}

统一响应类

@ApiModel(description = "响应对象")
public class ResponseResult<T> {
    private static final int SUCCESS_CODE = 0;
    private static final String SUCCESS_MESSAGE = "成功";

    @ApiModelProperty(value = "响应码", name = "code", required = true, example = "" + SUCCESS_CODE)
    private int code;

    @ApiModelProperty(value = "响应消息", name = "msg", required = true, example = SUCCESS_MESSAGE)
    private String msg;

    @ApiModelProperty(value = "响应数据", name = "data")
    private T data;

    // 省略get、set方法等等，详见源代码
}

用户Model

PS：用户model使用了lombok、jpa、validator，只需要关注@Api开头的注解就行了。

@Data
@Entity(name = "users")
@ApiModel(description = "用户Model")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Null(message = "id必须为空")
    @ApiModelProperty(value = "用户ID", name = "id")
    private Integer id;

    @Column
    @NotBlank(message = "用户名不能为空")
    @ApiModelProperty(value = "用户名", name = "username", required = true, example = "zhaoliu")
    private String username;

    @Column
    @NotBlank(message = "密码不能为空")
    @ApiModelProperty(value = "密码", name = "password", required = true, example = "123456")
    private String password;
}

文档界面

创建用户

ID获取用户

源码

GitHub：swagger-demo

参考信息

SpringFox官网
Swagger官方Wiki 注解
Spring Boot中使用Swagger2构建强大的RESTful API文档
第四章 springboot + swagger
Spring启动RESTful API文档使用Swagger 2
swagger2常用注解说明
swagger注释API详细说明
Swagger2 添加HTTP head参数
Swagger2 非全局、无需重复输入的Head参数（Token）配置