简介
1、使用spring-boot进行项目构建，使用spring-cloud进行服务化，使用eureka作为服务注册中心，使用zuul最为网关，并集成了swagger-UI用于API管理。
2、项目有6个工程，包含eureka服务，zuul服务，三个order服务构成的集群，payment服务。
3、payment服务不通过网关调用order服务集群。
4、eureka的注册中心管理地址：http://localhost:8080/
5、zuul的swagger接口管理地址：http://localhost:8081/swagger-ui.html
6、项目源码的github地址：https://github.com/xuejian0616/spring-boot-cloud-zuul-eureka-swagger-demo
项目搭建：
1、创建项目结构：
项目结构
eureka-server：eureka服务注册中心，端口8080,
zuul-server：zuul网关，端口8081
order-server：订单系统，端口8082
order-server1：订单系统，端口8083
order-server2：订单系统，端口8084
payment-server：支付系统，端口8085
2、eureka-server项目配置：
在服务项目的起动类上使用@EnableEurekaServer用于注解服务端，使用@EnableFeignClients注解服务的消费端。
在配置文件application.yml中添加配置：
## 服务端口
server:
port: 8080
## 服务名称
spring:
application:
name: eureka-server
## eureka配置
eureka:
server:
enable-self-preservation: false
client:
register-with-eureka: true
fetch-registry: false
service-url:
defaultZone: http://localhost:${server.port}/eureka/
## 日志
logging:
level:
root: info
com:
netflix:
eureka: 'off'
discovery: 'off'
## 关闭管理类接口的安全认证
management:
security:
enabled: false
在pom.xml中添加依赖
<!-- eureka的服务端添加eureka-server -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka-server</artifactId>
</dependency>
<!-- eureka的消费端添加eureka -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<!--服务端的API接口需要swagger2-->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.5.0</version>
</dependency>
3、配置zuul-server网关服务
在配置文件application.yml中添加配置：
# 添加路由配置
zuul:
routes:
payment-server:
path: /pay/**
order-server:
path: /order/**
zuul的路由配置，zuul会将/order/**请求路由到服务名为order-server的系统上。
swagger的配置类SwaggerConfig
@Configuration
@EnableSwagger2
public class SwaggerConfig {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo());
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("订单支付系统")
.description("订单支付系统接口文档")
.termsOfServiceUrl("http://localhost:8081")
.contact()
.version("1.0")
.build();
}
@Bean
UiConfiguration uiConfig() {
return new UiConfiguration(null, "list", "alpha", "schema",
UiConfiguration.Constants.DEFAULT_SUBMIT_METHODS, false, true, 60000L);
}
}
swagger文档资源配置类DocumentationConfig，用于配置接口文档的说明
@Component
@Primary
public class DocumentationConfig implements SwaggerResourcesProvider {
@Override
public List<SwaggerResource> get() {
List resources = new ArrayList<>();
resources.add(swaggerResource("订单系统", "/order/v2/api-docs", "1.0"));
resources.add(swaggerResource("支付系统", "/pay/v2/api-docs", "1.0"));
return resources;
}
private SwaggerResource swaggerResource(String name, String location, String version) {
SwaggerResource swaggerResource = new SwaggerResource();
swaggerResource.setName(name);
swaggerResource.setLocation(location);
swaggerResource.setSwaggerVersion(version);
return swaggerResource;
}
}
通过在DocumentationConfig中配置文档资源，当在首页下拉框选择订单系统时可以获取文档详情
在zuul-server的启动类上添加@EnableZuulProxy和@EnableEurekaClient注解
@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
public class ZuulServerApplication {
public static void main(String[] args) {
SpringApplication.run(ZuulServerApplication.class, args);
}
}
在pom.xml中添加依赖
<!-- zuul的服务端添加zuul -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
<!-- eureka的消费端添加eureka -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<!--服务端的API接口需要swagger2-->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.5.0</version>
</dependency>
4、编写order-server订单服务
编写SwaggerConfig.class配置服务接口的API
@Configuration
@EnableSwagger2
public class SwaggerConfig {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.withClassAnnotation(Api.class))
.apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
.apis(RequestHandlerSelectors.basePackage("cn.xuhao.demo.orderserver.controller"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("订单系统api")
.description("订单系统接口文档说明")
.version("1.0")
.build();
}
@Bean
UiConfiguration uiConfig() {
return new UiConfiguration(null, "list", "alpha", "schema", UiConfiguration.Constants.DEFAULT_SUBMIT_METHODS, false, true);
}
}
编写OrderServerController暴露的服务接口
@RestController
@Api(tags = "OrderServerController", description = "订单系统模块相关接口")
public class OrderServerController {
@Value("${server.port}")
String port;
@RequestMapping("/orderSomething")
@ApiOperation(value = "下单")
public ResponseMessage order(@RequestParam String name) {
String resule = "第"+name+"次请求,服务的端口为:" +port;
return new ResponseMessageBuilder().code(200).message("OrderService1-下单成功"+resule).build();
}
}
在启动类上添加 @EnableEurekaServer和@EnableFeignClients注解
其他两个order-server项目一样，就是端口号不同
5、编写payment-server订单服务
配置跟订单服务差不多。
添加订单服务访问接口
@Service
@FeignClient(name = "ORDER-SERVER", fallback = OrderServiceClient.OrderServiceClientFallback.class)
public interface OrderServiceClient {
@RequestMapping(value = "/orderSomething",method = RequestMethod.GET)
String order(@RequestParam(value = "name") String name);
@Component
class OrderServiceClientFallback implements OrderServiceClient {
private static final Logger LOGGER = LoggerFactory.getLogger(OrderServiceClientFallback.class);
@Override
public String order(@RequestParam(value = "name") String name) {
LOGGER.info("异常发生，进入fallback方法");
return "SERVICE B FAILED! - FALLING BACK";
}
}
}
注意@FeignClient注解的name属性要跟注册中心中的服务名一致。
在支付服务中访问订单服务的接口
@RestController
@Api(tags = "支付系统接口", description = "支付系统模块相关接口")
public class PaymentServerController {
@Value("${name:unknown}")
private String name;
@Autowired
private RestTemplateUtil restTemplateUtil;
@Autowired
private RestTemplate restTemplate;
@Autowired
private OrderServiceClient orderServiceClient;
@Autowired
private DiscoveryClient discoveryClient;
/**
* 声明式的Rest客户端:Feign 调用
* @param name
* @return
*/
@RequestMapping("/payForSomething/{name}")
@ApiOperation(value = "支付接口")
public String pay(@PathVariable String name) {
return orderServiceClient.order(name);
}
/**
* 使用 Ribbon组件和Feign调用 比较
* @param name
* @return
*/
@RequestMapping("/testVoid")
@ApiOperation(value = "支付接口")
public String testVoid() {
System.out.println("调用testVoid");
String result = restTemplate.getForObject("http://order-server/testVoid", String.class);
System.out.println("result:"+result);
String result2 = null;
try {
result2 = orderServiceClient.testVoid();
} catch (Exception e) {
e.printStackTrace();
}
return result + "-----" + result2;
}
/**
* 使用Ribbon组件负载均衡的调用服务者接口
* @param name
* @return
*/
@RequestMapping("/payForSomething2/{name}")
@ApiOperation(value = "支付接口")
public String pay2(@PathVariable String name) {
String result = restTemplate.getForObject("http://order-server/orderSomething/"+name, String.class);
System.out.println("result:"+result);
return result;
}
/**
* 自己实现负载均衡的调用服务者接口--没有实现
* @param name
* @return
*/
@RequestMapping("/payForSomething3/{name}")
@ApiOperation(value = "支付接口")
public String pay3(@PathVariable String name) {
Result<ResponseMessage> result =restTemplateUtil.getAsObj("order-server","/orderSomething/"+name,null,
new ParameterizedTypeReference<Result<ResponseMessage>>(){});
System.out.println("result:"+result);
return result.toString();
}
/**
* 使用 discoveryClient 获取服务器的服务信息
* @param name
* @return
*/
@RequestMapping("/test/{name}")
@ApiOperation(value = "支付接口")
public String test(@PathVariable String name) {
StringBuilder buf = new StringBuilder();
List<String> serviceIds = discoveryClient.getServices();
System.out.println("serviceIds:"+serviceIds);
if(!CollectionUtils.isEmpty(serviceIds)){
for(String s : serviceIds){
System.out.println("serviceId:" + s);
List<ServiceInstance> serviceInstances = discoveryClient.getInstances(s);
if(!CollectionUtils.isEmpty(serviceInstances)){
for(ServiceInstance si:serviceInstances){
buf.append("["+si.getServiceId() +" host=" +si.getHost()+" port="+si.getPort()+" uri="+si.getUri()+" etadata= "+si.getMetadata()+"]");
}
}else{
buf.append("no service.");
}
}
}
System.out.println("service:"+buf.toString());
return buf.toString();
}
}
