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简介

市面上都是 Spring Cloud + openfeign

想搞个Spring（boot） + openfeign

Github: https://github.com/OpenFeign/feign

Feign 10.x 及更高版本基于 Java 8 构建，应该适用于 Java 9、10 和 11。对于需要 JDK 6 兼容性的用户，请使用 Feign 9.x

功能图

架构图

依赖

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-core</artifactId><version>13.0</version>
</dependency>

原生Fegin示例

基础

// 1.定义接口
interface GitHub {@RequestLine("GET /repos/{owner}/{repo}/contributors")List<Contributor> contributors(@Param("owner") String owner, @Param("repo") String repo);@RequestLine("POST /repos/{owner}/{repo}/issues")void createIssue(Issue issue, @Param("owner") String owner, @Param("repo") String repo);}// 测试
public class MyApp {public static void main(String... args) {GitHub github = Feign.builder().logLevel(Logger.Level.FULL).options(new Request.Options(Duration.ofSeconds(2), Duration.ofSeconds(5), true)).encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).target(GitHub.class, "https://api.github.com");List<Contributor> contributors = github.contributors("OpenFeign", "feign");for (Contributor contributor : contributors) {System.out.println(contributor.login + " (" + contributor.contributions + ")");}}
}

原生注解@RequestLine有额外的理解成本，我们一般不会使用

契约

从10.5.0版本开始提供了feign-spring4，来适配spring注解。
使用spring注解需要将contract契约设置为SpringContract。

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-spring4</artifactId><version>13.0</version>
</dependency>

Feign 仅支持处理 java 接口（不支持抽象类或具体类）

方法注解

• @RequestMapping
• @GetMapping
• @PostMapping
• @PutMapping
• @DeleteMapping
• @PatchMapping

参数注解

• @PathVariable
• @RequestParam

interface GitHub {@GetMapping("/repos/{owner}/{repo}/contributors") //改变List<Contributor> contributors(@PathVariable("owner") String owner, @PathVariable("repo") String repo);@PostMapping("/repos/{owner}/{repo}/issues") //改变void createIssue(Issue issue, @PathVariable("owner") String owner, @PathVariable("repo") String repo);
}
public class MyApp {public static void main(String... args) {GitHub github = Feign.builder().logLevel(Logger.Level.FULL).contract(new SpringContract()) // 这里 SpringContract.options(new Request.Options(Duration.ofSeconds(2), Duration.ofSeconds(5), true)).encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).target(GitHub.class, "https://api.github.com");List<Contributor> contributors = github.contributors("OpenFeign", "feign");for (Contributor contributor : contributors) {System.out.println(contributor.login + " (" + contributor.contributions + ")");}}
}

日志

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-sl4j</artifactId><version>13.0</version>
</dependency>

SLF4JModule允许将 Feign 的日志记录定向到SLF4J，允许您轻松使用选择的日志记录记录（Logback、Log4J 等）

相当于 SLF4J 与 Feign 一起使用，满足 SLF4J 模块和您选择的 SLF4J 绑定添加到您的类路径中。然后，配置 Feign 使用 Slf4jLogger：

public class Example {public static void main(String[] args) {GitHub github = Feign.builder().logger(new Slf4jLogger()).logLevel(Level.FULL).target(GitHub.class, "https://api.github.com");}
}

重试

默认情况下，Feign会自动重试IOExceptions，无论HTTP方法如何，都将其视为临时的与网络相关的异常，并重试从ErrorDecoder中抛出的任何RetryableException。要自定义此行为，请通过构建器注册自定义的Retryer实例。

以下示例展示了如何在收到401响应时使用ErrorDecoder和Retryer来刷新令牌并进行重试。

public class Example {public static void main(String[] args) {var github = Feign.builder().decoder(new GsonDecoder()).retryer(new MyRetryer(100, 3)).errorDecoder(new MyErrorDecoder()).target(Github.class, "https://api.github.com");var contributors = github.contributors("foo", "bar", "invalid_token");for (var contributor : contributors) {System.out.println(contributor.login + " " + contributor.contributions);}}static class MyErrorDecoder implements ErrorDecoder {private final ErrorDecoder defaultErrorDecoder = new Default();@Overridepublic Exception decode(String methodKey, Response response) {// wrapper 401 to RetryableException in order to retryif (response.status() == 401) {return new RetryableException(response.status(), response.reason(), response.request().httpMethod(), null, response.request());}return defaultErrorDecoder.decode(methodKey, response);}}static class MyRetryer implements Retryer {private final long period;private final int maxAttempts;private int attempt = 1;public MyRetryer(long period, int maxAttempts) {this.period = period;this.maxAttempts = maxAttempts;}@Overridepublic void continueOrPropagate(RetryableException e) {if (++attempt > maxAttempts) {throw e;}if (e.status() == 401) {// remove Authorization first, otherwise Feign will add a new Authorization header// cause github responses a 400 bad requeste.request().requestTemplate().removeHeader("Authorization");e.request().requestTemplate().header("Authorization", "Bearer " + getNewToken());try {Thread.sleep(period);} catch (InterruptedException ex) {throw e;}} else {throw e;}}// Access an external api to obtain new token// In this example, we can simply return a fixed token to demonstrate how Retryer worksprivate String getNewToken() {return "newToken";}@Overridepublic Retryer clone() {return new MyRetryer(period, maxAttempts);}
}

Retryers负责通过从方法continueOrPropagate(RetryableException e)返回true或false来确定是否应该进行重试；如果需要，将为每个Client执行创建一个Retryer实例，以便在每个请求之间维护状态。

如果决定重试不成功，将抛出最后一个RetryException。要抛出导致重试不成功的原始原因，请使用exceptionPropagationPolicy()选项构建您的Feign客户端。

编码器/解码器

• GSON
• Jackson
• Moshi
• SOAP

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-jackson</artifactId><version>13.0</version>
</dependency><dependency><groupId>io.github.openfeign</groupId><artifactId>feign-gson</artifactId><version>13.0</version>
</dependency>

public class Example {public static void main(String[] args) {GitHub github = Feign.builder().encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).target(GitHub.class, "https://api.github.com");}
}

自定义解码器

public class MyJacksonDecoder extends JacksonDecoder {@Overridepublic Object decode(Response response, Type type) throws IOException {if (response.body() == null) {return null;}if (type == String.class) {return StreamUtils.copyToString(response.body().asInputStream(), StandardCharsets.UTF_8);}return super.decode(response, type);}
}

请求拦截器

当您需要更改所有请求时，无论其目标是什么，您都需要配置一个RequestInterceptor. 例如，如果您充当中介，您可能想要传播标X-Forwarded-For头。

static class ForwardedForInterceptor implements RequestInterceptor {@Override public void apply(RequestTemplate template) {template.header("X-Forwarded-For", "origin.host.com");}
}public class Example {public static void main(String[] args) {Bank bank = Feign.builder().decoder(accountDecoder).requestInterceptor(new ForwardedForInterceptor()).target(Bank.class, "https://api.examplebank.com");}
}

响应拦截器

如果您需要将错误视为成功并返回结果而不是发送异常，那么您可以使用ResponseInterceptor。

例如，Feign 包含一个简单的RedirectionInterceptor可用于从重定向响应中提取位置标头。

public interface Api {// returns a 302 response@RequestLine("GET /location")String location();
}public class MyApp {public static void main(String[] args) {// Configure the HTTP client to ignore redirectionApi api = Feign.builder().options(new Options(10, TimeUnit.SECONDS, 60, TimeUnit.SECONDS, false)).responseInterceptor(new RedirectionInterceptor()).target(Api.class, "https://redirect.example.com");}
}

表单文件上传支持

<dependency><groupId>io.github.openfeign.form</groupId><artifactId>feign-form</artifactId>
</dependency>

错误解码器

ErrorDecoder如果您需要更多地控制处理意外响应，Feign 实例可以通过构建器注册自定义。

public class Example {public static void main(String[] args) {MyApi myApi = Feign.builder().errorDecoder(new MyErrorDecoder()).target(MyApi.class, "https://api.hostname.com");}
}

所有导致 HTTP 状态不在 2xx 范围内的响应都将触发ErrorDecodersdecode方法，允许您处理响应、将失败包装到自定义异常中或执行任何其他处理。如果您想再次重试请求，请抛出RetryableException. 这将调用注册的 Retryer.

断路器

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-hystrix</artifactId><version>13.0</version>
</dependency>

HystrixFeign配置Hystrix提供的断路器支持。

要将 Hystrix 与 Feign 一起使用，请将 Hystrix 模块添加到类路径中。然后使用HystrixFeign构建器：

public class Example {public static void main(String[] args) {MyService api = HystrixFeign.builder().target(MyFeignClient.class, "http://remote-service-url", new MyFeignClientFallbackFactory());}
}interface GitHub {@GetMapping("/repos/{owner}/{repo}/contributors")List<Contributor> contributors(@PathVariable("owner") String owner, @PathVariable("repo") String repo);}    public class MyFeignClientFallbackFactory implements FallbackFactory<GitHub> {@Overridepublic GitHub create(Throwable cause) {return new GitHub() {@Overridepublic List<Contributor> contributors(String owner, String repo) {return new ArrayList<>(); // 回退逻辑，可以返回默认值或错误消息}};}
}

对于异步或反应式使用，返回HystrixCommand<YourType>或CompletableFuture<YourType>。

上面配置callback使用

设置超时等

1. 熔断器配置：你可以设置熔断器的相关属性，如 circuitBreakerErrorThresholdPercentage、circuitBreakerSleepWindowInMilliseconds、circuitBreakerRequestVolumeThreshold 等，以控制熔断器的行为。
2. 线程池配置：如果你在 Hystrix 命令中使用了线程池隔离，你可以设置线程池的相关属性，如 coreSize、maxQueueSize、keepAliveTimeMinutes 等。
3. 超时属性：除了设置总的执行超时时间，你还可以设置 executionTimeoutEnabled、executionIsolationStrategy 等超时相关属性。
4. 命令名和组名：你可以自定义命令的名称和分组名称，通过 andCommandKey 和 andCommandGroup 方法来设置。
5. 并发属性：你可以设置命令执行的并发性相关属性，如 executionIsolationSemaphoreMaxConcurrentRequests。

public class MyApp {public static void main(String... args) {GitHub github = HystrixFeign.builder().logLevel(Logger.Level.FULL)// 设置超时等.setterFactory((target, method) -> HystrixCommand.Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey(target.name())).andCommandKey(HystrixCommandKey.Factory.asKey(method.getName())).andCommandPropertiesDefaults(HystrixCommandProperties.Setter().withExecutionTimeoutInMilliseconds(5000) // 设置执行超时时间.withCircuitBreakerRequestVolumeThreshold(20) // 设置熔断器请求数阈值.withCircuitBreakerSleepWindowInMilliseconds(10000) // 设置熔断器休眠窗口).andThreadPoolPropertiesDefaults(HystrixThreadPoolProperties.Setter().withCoreSize(10) // 设置线程池核心大小.withMaxQueueSize(100) // 设置线程池队列大小)).contract(new SpringContract()).options(new Request.Options(Duration.ofSeconds(2), Duration.ofSeconds(5), true)).encoder(new JacksonEncoder()).decoder(new JacksonDecoder()).target(GitHub.class, "https://api.github.com", new MyFeignClientFallbackFactory());List<Contributor> contributors = github.contributors("OpenFeign", "feign");for (Contributor contributor : contributors) {System.out.println(contributor.login + " (" + contributor.contributions + ")");}}
}

指标metrics

默认情况下，feign不会收集任何指标。

但是，可以向任何假客户端添加指标收集功能。

指标功能提供了一流的指标API，用户可以利用该API来深入了解请求/响应生命周期。

<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-micrometer</artifactId><version>13.0</version>
</dependency>

public class MyApp {public static void main(String[] args) {GitHub github = Feign.builder().addCapability(new MicrometerCapability()).target(GitHub.class, "https://api.github.com");github.contributors("OpenFeign", "feign");// metrics will be available from this point onwards}
}

Hystrix指标监控

hystrix.execution{event=failure,group=https://api.github.com,key=contributors,terminal=false} throughput=0.033333/s
hystrix.execution{event=fallback_missing,group=https://api.github.com,key=contributors,terminal=true} throughput=0.033333/s
hystrix.execution{event=exception_thrown,group=https://api.github.com,key=contributors,terminal=false} throughput=0.033333/s
hystrix.execution.terminal{group=https://api.github.com,key=contributors} throughput=0.033333/s
hystrix.threadpool.tasks.cumulative.count{key=https://api.github.com,type=completed} throughput=0.016667/s
hystrix.threadpool.tasks.cumulative.count{key=https://api.github.com,type=scheduled} throughput=0.016667/s

客户端

• OkHttpClient: 实现 SPDY 和更好的网络控制
• RibbonClient: 智能路由和弹性功能
• Http2Client(java11): 实现HTTP/2的Java11新客户端

<!-- https://mvnrepository.com/artifact/io.github.openfeign/feign-okhttp -->
<dependency><groupId>io.github.openfeign</groupId><artifactId>feign-okhttp</artifactId><version>13.0</version>
</dependency><dependency><groupId>io.github.openfeign</groupId><artifactId>feign-httpclient</artifactId>
</dependency>

OpenFeign默认Http客户端是HttpURLConnection（JDK自带的Http工具），该工具不能配置连接池，生产中使用时性能较差，故我们配置自己的Apache HttpClient连接池。（当然Open Feign也有OkHttp的适配）

public class Example {public static void main(String[] args) {GitHub github = Feign.builder().client(new OkHttpClient()).target(GitHub.class, "https://api.github.com");}
}

配合SpringBoot（阶段一）

就是把上面的Bean变为Spring Bean去托管，示例代码如下

@Configuration
public class FeginConfig {@Beanpublic Feign.Builder feignBuilder() {return Feign.builder().options(new Request.Options(Duration.ofSeconds(2), Duration.ofSeconds(5), true));}@Bean@ConditionalOnMissingBean@ConditionalOnProperty(name = "feign.hystrix.enabled", matchIfMissing = false)public Feign.Builder feignHystrixBuilder() {return HystrixFeign.builder();}@Bean@ConditionalOnProperty(value = "feign.okhttp.enabled", matchIfMissing = false)public Client feignClient() {return new OkHttpClient();}@Bean@ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)public Client feignClient() {return new ApacheHttpClient();}@Beanpublic UserClient UserClient(){feignBuilder.options(new Request.Options(2000, 5000));return feignBuilder.target(UserClient.class, "https://xxxx");}@Beanpublic OrgClient OrgClient(){feignBuilder.options(new Request.Options(30000, 50000));return feignBuilder.target(OrgClient.class, "https://xxxx");}}

配合SpringBoot（阶段二）

• https://github.com/spring-cloud/spring-cloud-openfeign

参考Spring Cloud Fegin流程如下：

1. 项目加载：在项目的启动阶段，EnableFeignClients 注解扮演了“启动开关”的角色，它使用 Spring 框架的 Import 注解导入了 FeignClientsRegistrar 类，开始了OpenFeign 组件的加载过程。
2. 扫包：FeignClientsRegistrar 负责 FeignClient 接口的加载，它会在指定的包路径下扫描所有的 FeignClients 类，并构造 FeignClientFactoryBean 对象来解析FeignClient 接口。
3. 解析 FeignClient 注解：FeignClientFactoryBean 有两个重要的功能，一个是解析FeignClient 接口中的请求路径和降级函数的配置信息；另一个是触发动态代理的构造过程。其中，动态代理构造是由更下一层的 ReflectiveFeign 完成的。
4. 构建动态代理对象：ReflectiveFeign 包含了 OpenFeign 动态代理的核心逻辑，它主要负责创建出 FeignClient 接口的动态代理对象。ReflectiveFeign 在这个过程中有两个重要任务，一个是解析 FeignClient 接口上各个方法级别的注解，将其中的远程接口URL、接口类型（GET、POST 等）、各个请求参数等封装成元数据，并为每一个方法生成一个对应的 MethodHandler 类作为方法级别的代理；另一个重要任务是将这些MethodHandler 方法代理做进一步封装，通过 Java 标准的动态代理协议，构建一个实现了 InvocationHandler 接口的动态代理对象，并将这个动态代理对象绑定到FeignClient 接口上。这样一来，所有发生在 FeignClient 接口上的调用，最终都会由它背后的动态代理对象来承接。

1.EnableLakerFeignClients

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Documented
@Import(LakerFeignClientsRegistrar.class)
public @interface EnableLakerFeignClients {/*** Base packages to scan for annotated components.* @return base packages*/String[] basePackages() default {};
}

2.LakerFeignClientsRegistrar

public class LakerFeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLoaderAware {private ResourceLoader resourceLoader;@Overridepublic void setResourceLoader(ResourceLoader resourceLoader) {this.resourceLoader = resourceLoader;}@Overridepublic void registerBeanDefinitions(AnnotationMetadata metadata, BeanDefinitionRegistry registry) {registerFeignClients(metadata, registry);}public void registerFeignClients(AnnotationMetadata metadata, BeanDefinitionRegistry registry) {Set<BeanDefinition> candidateComponents = new LinkedHashSet<>();Map<String, Object> attrs = metadata.getAnnotationAttributes(EnableLakerFeignClients.class.getName());ClassPathScanningCandidateComponentProvider scanner = getScanner();scanner.setResourceLoader(this.resourceLoader);scanner.addIncludeFilter(new AnnotationTypeFilter(LakerFeignClient.class));Set<String> basePackages = getBasePackages(metadata);for (String basePackage : basePackages) {candidateComponents.addAll(scanner.findCandidateComponents(basePackage));}for (BeanDefinition candidateComponent : candidateComponents) {if (candidateComponent instanceof AnnotatedBeanDefinition beanDefinition) {// verify annotated class is an interfaceAnnotationMetadata annotationMetadata = beanDefinition.getMetadata();Assert.isTrue(annotationMetadata.isInterface(), "@FeignClient can only be specified on an interface");Map<String, Object> attributes = annotationMetadata.getAnnotationAttributes(LakerFeignClient.class.getCanonicalName());String className = annotationMetadata.getClassName();registerFeignClient(className, attributes, registry);}}}private void registerFeignClient(String className, Map<String, Object> attributes,BeanDefinitionRegistry registry) {BeanDefinitionBuilder definition = BeanDefinitionBuilder.genericBeanDefinition(LakerFeignClientFactoryBean.class);definition.addPropertyValue("url", getUrl(attributes));definition.addPropertyValue("type", className);definition.setAutowireMode(AbstractBeanDefinition.AUTOWIRE_BY_TYPE);AbstractBeanDefinition beanDefinition = definition.getBeanDefinition();beanDefinition.setPrimary(false);BeanDefinitionHolder holder = new BeanDefinitionHolder(beanDefinition, className, null);BeanDefinitionReaderUtils.registerBeanDefinition(holder, registry);}private String resolve(String value) {if (StringUtils.hasText(value) && this.resourceLoader instanceof ConfigurableApplicationContext) {return ((ConfigurableApplicationContext) this.resourceLoader).getEnvironment().resolvePlaceholders(value);}return value;}private String getUrl(Map<String, Object> attributes) {String url = resolve((String) attributes.get("url"));if (StringUtils.hasText(url)) {if (!url.contains("://")) {url = "https://" + url;}try {new URL(url);} catch (MalformedURLException e) {throw new IllegalArgumentException(url + " is malformed", e);}}return url;}protected ClassPathScanningCandidateComponentProvider getScanner() {return new ClassPathScanningCandidateComponentProvider(false) {@Overrideprotected boolean isCandidateComponent(AnnotatedBeanDefinition beanDefinition) {boolean isCandidate = false;if (beanDefinition.getMetadata().isIndependent()) {if (!beanDefinition.getMetadata().isAnnotation()) {isCandidate = true;}}return isCandidate;}};}protected Set<String> getBasePackages(AnnotationMetadata importingClassMetadata) {Map<String, Object> attributes = importingClassMetadata.getAnnotationAttributes(EnableLakerFeignClients.class.getCanonicalName());Set<String> basePackages = new HashSet<>();for (String pkg : (String[]) attributes.get("basePackages")) {if (StringUtils.hasText(pkg)) {basePackages.add(pkg);}}return basePackages;}
}

3.LakerFeignClientFactoryBean

@Data
class LakerFeignClientFactoryBean implements FactoryBean<Object>, InitializingBean, ApplicationContextAware {private Class<?> type;private String url;private ApplicationContext applicationContext;@Overridepublic void afterPropertiesSet() throws Exception {Assert.hasText(this.url, "url must be set");}@Overridepublic void setApplicationContext(ApplicationContext context) throws BeansException {this.applicationContext = context;}protected Feign.Builder feign() {Feign.Builder builder = get(Feign.Builder.class).contract(new SpringContract())// required values.encoder(get(Encoder.class)).decoder(get(Decoder.class));// optional valuesClient client = getOptional(Client.class);if (client != null) {builder.client(client);}Logger.Level level = getOptional(Logger.Level.class);if (level != null) {builder.logLevel(level);}Retryer retryer = getOptional(Retryer.class);if (retryer != null) {builder.retryer(retryer);}ErrorDecoder errorDecoder = getOptional(ErrorDecoder.class);if (errorDecoder != null) {builder.errorDecoder(errorDecoder);}Request.Options options = getOptional(Request.Options.class);if (options != null) {builder.options(options);}Map<String, RequestInterceptor> requestInterceptors = getOptionals(RequestInterceptor.class);if (requestInterceptors != null) {builder.requestInterceptors(requestInterceptors.values());}return builder;}protected <T> T get(Class<T> type) {if (BeanFactoryUtils.beanNamesForTypeIncludingAncestors(applicationContext, type).length > 0) {return BeanFactoryUtils.beanOfTypeIncludingAncestors(applicationContext, type);} else {throw new IllegalStateException("No bean found of type " + type);}}protected <T> T getOptional(Class<T> type) {if (BeanFactoryUtils.beanNamesForTypeIncludingAncestors(applicationContext, type).length > 0) {return BeanFactoryUtils.beanOfTypeIncludingAncestors(applicationContext, type);}return null;}protected <T> Map<String, T> getOptionals(Class<T> type) {if (BeanFactoryUtils.beanNamesForTypeIncludingAncestors(applicationContext, type).length > 0) {return BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, type);}return null;}@Overridepublic Object getObject() throws Exception {return feign().target(type, url);}@Overridepublic Class<?> getObjectType() {return this.type;}@Overridepublic boolean isSingleton() {return true;}}

4.LakerFeignClient

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface LakerFeignClient {String url() default "";
}

5.FeginConfig

@Configuration
public class FeginConfig {@Beanpublic Feign.Builder feignBuilder() {return Feign.builder().options(new Request.Options(Duration.ofSeconds(2), Duration.ofSeconds(5), true));}@Bean@ConditionalOnMissingBean@ConditionalOnProperty(name = "feign.hystrix.enabled", matchIfMissing = false)public Feign.Builder feignHystrixBuilder() {return HystrixFeign.builder();}@Bean@ConditionalOnProperty(value = "feign.okhttp.enabled", matchIfMissing = true)public Client feignClient() {return new OkHttpClient();}@Beanpublic Encoder encoder() {return new JacksonEncoder();}@Beanpublic Decoder decoder() {return new JacksonDecoder();}
}

使用示例

// 1.启用 EnableLakerFeignClients
@SpringBootApplication
@EnableLakerFeignClients(basePackages = "com.laker.admin")
public class EasyAdminApplication {public static void main(String[] args) {SpringApplication.run(EasyAdminApplication.class, args);}// 或者
@Configuration
@EnableLakerFeignClients(basePackages = "com.laker.admin")
public class FeginConfig {
}
// 2.定义接口
@LakerFeignClient(url ="https://api.github.com")
public interface GitHub {@GetMapping("/repos/{owner}/{repo}/contributors")List<Contributor> contributors(@PathVariable("owner") String owner, @PathVariable("repo") String repo);@PostMapping("/repos/{owner}/{repo}/issues")void createIssue(Issue issue, @PathVariable("owner") String owner, @PathVariable("repo") String repo);
}
// 3.调用示例
@Autowired
GitHub gitHub;List<Contributor>  contributors = gitHub.contributors("lakernote","easy-admin");

参考

• https://www.infoq.cn/article/c9rk1mg0erk5mfqps4wz