spring cloud搭建微服务系统，每个业务模块使用swagger开放文档接口查询，在业务网关模块提供swagger文档聚合查询接口，可以通过选择业务模块分类查看。
框架选型、版本及主要功能- spring boot 2.1.6.RELEASE
- spring cloud Greenwich.SR3
- spring cloud gateway 2.1.3.RELEASE 网关组件
- knife4j 2.0.1 增强swagger ui样式，网关使用其starter依赖
- swagger bootstrap ui 1.9.6 增强swagger ui样式
- spring4all-swagger 1.9.0.RELEASE 配置化swagger参数，免去代码开发
-
swagger组件
开发一个项目内的swagger-spring-boot-starter，整合swagger bootstrap ui 1.9.6和spring4all-swagger 1.9.0.RELEASE，对外提供@EnableSwagger注解服务 -
业务模块
引用自定义的swagger-spring-boot-starter，同时在配置文件中添加本模块的swagger基础信息配置。 -
网关模块
引用knife4j整合swagger，并开发filter、handler、config对多模块的swagger进行聚合
pom.xml文件依赖
com.github.xiaoymin
swagger-bootstrap-ui
1.9.6
com.spring4all
swagger-spring-boot-starter
1.9.0.RELEASE
自定义注解
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@documented
@EnableSwagger2Doc
@EnableSwaggerBootstrapUI
@import(SwaggerCommandLineRunner.class)
public @interface EnableSwagger {
}
注意@EnableSwagger2Doc,@EnableSwaggerBootstrapUI注解，@EnableSwagger2Doc注解能将swagger配置文档化，避免业务模块再开发swagger的代码，@EnableSwaggerBootstrapUI就是改进了swagger ui界面。
指定swagger的默认访问端口
@Slf4j
@Component
public class SwaggerCommandLineRunner implements CommandLineRunner {
@Value("${server.port:8080}")
private String serverPort;
@Override
public void run(String... args) {
log.info("swagger url:http://localhost:" + serverPort + "/doc.html");
}
}
这样这个组件就集成完毕了，这个组件以多module的形式存在于项目公共组件中，使用maven引用即可。
业务模块开发application中使用@EnableSwagger注解（自行开发的那个，不要搞错了）
@SpringBootApplication
@EnableDiscoveryClient
@MapperScan("com.hy.demo.**.mapper")
@EnableSwagger
public class DemoApplication {
public static void main(String[] args) {
ConfigurableApplicationContext ctx = SpringApplication.run(DemoApplication.class, args);
ctx.start();
}
}
配置文件加上swagger信息：
swagger:
enabled: true
title: hy demo
base-package: com.hy.demo
如此业务模块部分就完成了，非常简单，代码零侵入
网关开发网关的开发是重头戏，里面需要集成knife4j（这个框架是swagger bootstrap ui的最终版本，最终版改了个名字，开发是同一个人），并且对请求url进行适配
pom.xml添加swagger的依赖
com.github.xiaoymin
knife4j-spring-boot-starter
2.0.1
配置文件gateway部分，对业务接口配置和swagger配置要单独设置routes，例如：
spring:
application:
name: gate
cloud:
gateway:
discovery:
locator:
#enabled: true0
enabled: false
lower-case-service-id: true
routes:
- id: demo
uri: lb://demo
predicates:
- Path=/api/json/hy/demo
@Slf4j
@Component
@Primary
@AllArgsConstructor
public class SwaggerResourceConfig implements SwaggerResourcesProvider {
private static final String SWAGGER_URI = "/v2/api-docs";
private final RouteLocator routeLocator;
private final GatewayProperties gatewayProperties;
@Override
public List get() {
List resources = new ArrayList<>();
List routes = new ArrayList<>();
// 只抽取后缀为Swagger的路由信息
routeLocator.getRoutes().filter(r -> r.getId().endsWith("Swagger")).subscribe(route -> routes.add(route.getId()));
gatewayProperties.getRoutes().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId())).forEach(route -> {
route.getPredicates().stream()
.filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
.forEach(predicateDefinition -> resources.add(swaggerResource(route.getId(),
predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
.replace("
@RestController
public class SwaggerHandler {
@Autowired(required = false)
private SecurityConfiguration securityConfiguration;
@Autowired(required = false)
private UiConfiguration uiConfiguration;
private final SwaggerResourcesProvider swaggerResources;
@Autowired
public SwaggerHandler(SwaggerResourcesProvider swaggerResources) {
this.swaggerResources = swaggerResources;
}
@GetMapping("/swagger-resources/configuration/security")
public Mono> securityConfiguration() {
return Mono.just(new ResponseEntity<>(
Optional.ofNullable(securityConfiguration).orElse(SecurityConfigurationBuilder.builder().build()), HttpStatus.OK));
}
@GetMapping("/swagger-resources/configuration/ui")
public Mono> uiConfiguration() {
return Mono.just(new ResponseEntity<>(
Optional.ofNullable(uiConfiguration).orElse(UiConfigurationBuilder.builder().build()), HttpStatus.OK));
}
@GetMapping("/swagger-resources")
public Mono swaggerResources() {
return Mono.just((new ResponseEntity<>(swaggerResources.get(), HttpStatus.OK)));
}
}
swagger 过滤器示例代码
@Component
public class SwaggerHeaderFilter extends AbstractGatewayFilterFactory {
private static final String HEADER_NAME = "X-Forwarded-Prefix";
private static final String SWAGGER_URI = "/v2/api-docs";
@Override
public GatewayFilter apply(Object config) {
return (exchange, chain) -> {
ServerHttpRequest request = exchange.getRequest();
String path = request.getURI().getPath();
if (!StringUtils.endsWithIgnoreCase(path,SWAGGER_URI)) {
return chain.filter(exchange);
}
String basePath = path.substring(0, path.lastIndexOf(SWAGGER_URI));
ServerHttpRequest newRequest = request.mutate().header(HEADER_NAME, basePath).build();
ServerWebExchange newExchange = exchange.mutate().request(newRequest).build();
return chain.filter(newExchange);
};
}
}
由于该组件是业务网关组件，肯定会有通用的过滤器，来完成token校验，身份证识别等功能，记得在这些过滤器将"/v2/api-docs"的URL放行，示例代码：
if (StringUtils.endsWithIgnoreCase(path,"/v2/api-docs")) {
return chain.filter(exchange);
}
启动相应的注册中心、业务模块、网关模块进行验证，验证swagger文档、业务接口的处理能否同时满足。
