@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface ApiVersion {
    /**
     * 接口版本号(对应swagger中的group)
     * @return String[]
     */
    String[] group();
}

@Configuration
public class Swagger2Config {
  //默认版本的接口api-docs分组
  @Bean
  public Docket createRestApi() {
    return new Docket(DocumentationType.SWAGGER_2)
        .apiInfo(apiInfo())
        .select()
        //指定要扫描的包的路径
        .apis(RequestHandlerSelectors.basePackage("com.vhukze.controller"))
        .paths(PathSelectors.any())
        .build();
  }
  //app1.0.0版本对外接口
    @Bean
    public Docket vApp100(){
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .groupName(ApiVersionConstant.FAP_APP100)
                .select()
                .apis(input -> {
                    ApiVersion apiVersion = input.getHandlerMethod().getMethodAnnotation(ApiVersion.class);
                    if(apiVersion!=null&&Arrays.asList(apiVersion.group()).contains(ApiVersionConstant.FAP_APP100)){
                        return true;
                    }
                    return false;
                })//controller路径
                .paths(PathSelectors.any())
                .build();
    }
    //app1.0.1版本对外接口
    @Bean
    public Docket vApp101(){
      return new Docket(DocumentationType.SWAGGER_2)
          .apiInfo(apiInfo())
          .groupName(ApiVersionConstant.FAP_APP101)
          .select()
          .apis(input -> {
            ApiVersion apiVersion = input.getHandlerMethod().getMethodAnnotation(ApiVersion.class);
            if(apiVersion!=null&&Arrays.asList(apiVersion.group()).contains(ApiVersionConstant.FAP_APP101)){
              return true;
            }
            return false;
          })//controller路径
          .paths(PathSelectors.any())
          .build();
    }
  //构建api文档的详细信息函数
  private ApiInfo apiInfo() {
    return new ApiInfoBuilder()
        //页面标题
        .title("测试使用Swagger")
        //创建人
        .contact(new Contact("DHEE", "www.baidu.com", "vhukze@qq.com"))
        //版本号
        .version("1.1")
        //描述
        .description("管理系统")
        .build();
  }
}

  @ApiOperation(value = "新增用户", notes = "输入用户名密码，进行注册", httpMethod = "POST")
  @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "UserDemo")
  @ApiResponses({
      //code重复的情况下，第一个声明的生效。
      @ApiResponse(code = 200,message = "插入成功" ),
  })
  @ApiVersion(group = ApiVersionConstant.FAP_APP101)
  @RequestMapping(value = "insert", method = RequestMethod.POST)
  public Boolean insertUser(@RequestBody UserDemo user) {
    boolean flag = userServer.insertUser(user);
    return flag;
  }
  @ApiOperation(value = "删除用户", notes = "根据用户名删除指定用户", httpMethod = "DELETE")
  @ApiImplicitParam(name = "username", value = "用户的用户名", required = true, dataType = "String")
  @ApiImplicitParams({
    @ApiImplicitParam(
      name = "username", value = "用户的用户名", required = true, dataType = "String"
    )
  })
  @ApiResponses({
      //code重复的情况下，第一个声明的生效。
      @ApiResponse(code = 200,message = "删除成功" ),
      @ApiResponse(code = 202,message = "删除失败，用户不存在")
  })
  @ApiVersion(group = ApiVersionConstant.FAP_APP100)
  @RequestMapping(value = "delete", method = RequestMethod.DELETE)
  public Boolean deleteUser(String username,HttpServletResponse response) {
    Boolean isSuccess = userServer.deleteUser(username);
    if(!isSuccess) {
      response.setStatus(202);
    }
    return isSuccess;
  }