spring cloud 项目调用传统web项目

最新推荐文章于 2024-01-18 11:04:23 发布

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本文详细介绍了SpringCloud中消费方如何通过引入特定的依赖和配置，使用Feign客户端调用提供方的REST服务。同时，提供了具体的代码示例，包括依赖配置、Feign接口定义、异常处理及调用类实现。

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消费方 spring cloud 项目配置：

需要引入jar包
<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

配置文件添加：
REST-SERVICE:
  ribbon:
    NIWSServerListClassName: com.netflix.loadbalancer.ConfigurationBasedServerList
    listOfServers: http://127.0.0.1:8080/

main启动类添加：
@EnableFeignClients(basePackages = "com.test.feign")

feign接口：
@FeignClient(name = "REST-SERVICE", path = "/restapi", fallbackFactory = TestServiceClientFallBack.class)
public interface TestServiceClient {

    @RequestMapping(value = "/getInfo/{id}", method = RequestMethod.GET)
    Map<String, Object> getInfo(@PathVariable("id") String id);

}

@Component
class TestServiceClientFallBack implements TestServiceClient, FallbackFactory<TestServiceClient> {

    Throwable throwable;

    Logger logger = LoggerFactory.getLogger(TestServiceClientFallBack.class);

    @Override
    public TestServiceClient create(Throwable throwable) {
        this.throwable = throwable;
        return new TestServiceClientFallBack();
    }

    @Override
    public Map<String, Object> getInfo(String id) {
        logger.error("id: {}", id);
        return new HashMap<>(4);
    }

}

调用类：
@RestController
public class RemoteTestController {
    @Autowired
    private TestServiceClient testServiceClient;

    @GetMapping(value = "/getInfo/{customerId}")
    public Map<String, Object> getInfo(@PathVariable("id") String id) {
        Map<String, Object> result = testServiceClient.getInfo(id);
        return result;
    }
}

提供方 web项目配置：

只需提供暴露的rest接口即可：
@RestController
public class TestController {

    @GetMapping(value = "/restapi/getInfo/{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Map<String, Object> getInfo(@PathVariable("id") String id) {
        Map<String, Object> result = new HashMap<>(4);
        result.put("id", id);
        System.out.println("getInfo 参数 result:" + result);
        return result;
    }
}

测试使用的例子，正常情况接口不要用Map传参，可读性太差