knife4j 正确开启HttpServletResponse流输出

注意：DocumentationType.SWAGGER_12和 DocumentationType.SWAGGER_2 情况下HttpServletResponse流输出会变成乱码。

@EnableKnife4j
@EnableSwagger2
@Configuration
@Import(BeanValidatorPluginsConfiguration.class)
public class SwaggerConfigurer {

    @Value("${swagger-ui.enabled:true}")
    private boolean isOpen;

    @Bean
    public Docket createCommonApi() {
        return new Docket(DocumentationType.OAS_30)
                .enable(isOpen)
                .apiInfo(apiInfo())
                .protocols(new HashSet<>(Arrays.asList("https", "http")))
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.xx.controller"))
                .paths(PathSelectors.any())
                .build().groupName("ALL-API");
    }

    public ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("xx技术系统-对外API文档")
                .description("接口文档")
                .termsOfServiceUrl("https://localhost:8087/xx/doc.html")
                .contact(new Contact("xx技术有限公司", "https://www.xx.com", "xx@qq.com"))
                .version("1.0.0")
                .build();

    }
}

当DocumentationType.OAS_30的时候，HttpServletResponse 输出就正常了。