不是springboot项目,是一个springmvc架构的web项目
时间: 2023-12-16 10:03:26 浏览: 27
好的,以下是一个简单的Spring MVC项目,集成了Eureka和Feign,您可以参考:
1. 首先,需要在pom.xml中添加以下依赖:
```xml
<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>
```
2. 在web.xml中添加DispatcherServlet配置
```xml
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
```
3. 创建spring-mvc.xml文件,并添加以下配置:
```xml
<context:component-scan base-package="com.example.controller" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate" />
<bean id="feignContext" class="org.springframework.cloud.openfeign.FeignContext">
<constructor-arg>
<map />
</constructor-arg>
</bean>
<bean id="feignBuilder" class="org.springframework.cloud.openfeign.FeignClientBuilder" />
<bean id="serviceProviderClient" class="org.springframework.cloud.openfeign.FeignClientFactoryBean"
p:name="service-provider" />
<bean id="serviceConsumerController" class="com.example.controller.ServiceConsumerController">
<constructor-arg ref="restTemplate" />
<constructor-arg ref="feignContext" />
<constructor-arg ref="feignBuilder" />
</bean>
<bean id="serviceProviderClientFallback" class="com.example.controller.ServiceProviderClientFallback" />
<bean id="hystrixFeignBuilder" class="org.springframework.cloud.netflix.feign.FeignHystrixBuilder">
<constructor-arg ref="serviceProviderClientFallback" />
</bean>
```
4. 创建一个Feign客户端接口,用于定义需要调用的服务API
```java
@FeignClient(name = "service-provider", fallbackFactory = ServiceProviderClientFallbackFactory.class)
public interface ServiceProviderClient {
@GetMapping("/hello")
String hello();
}
```
5. 在控制器中注入ServiceProviderClient,并调用其hello方法
```java
@Controller
public class ServiceConsumerController {
@Autowired
private RestTemplate restTemplate;
@Autowired
private FeignContext feignContext;
@Autowired
private FeignClientBuilder feignBuilder;
private ServiceProviderClient serviceProviderClient;
public ServiceConsumerController(RestTemplate restTemplate, FeignContext feignContext, FeignClientBuilder feignBuilder) {
this.restTemplate = restTemplate;
this.feignContext = feignContext;
this.feignBuilder = feignBuilder;
this.serviceProviderClient = feignBuilder.target(ServiceProviderClient.class, "http://service-provider");
}
@RequestMapping("/hello")
public String hello(Model model) {
// 使用RestTemplate调用服务提供者
String result = restTemplate.getForObject("http://service-provider/hello", String.class);
model.addAttribute("result1", result);
// 使用Feign调用服务提供者
serviceProviderClient = feignBuilder.target(ServiceProviderClient.class, "http://service-provider");
result = serviceProviderClient.hello();
model.addAttribute("result2", result);
return "hello";
}
}
```
6. 创建ServiceProviderClientFallbackFactory类,用于定义Feign客户端的fallback逻辑
```java
@Component
public class ServiceProviderClientFallbackFactory implements FallbackFactory<ServiceProviderClient> {
@Override
public ServiceProviderClient create(Throwable throwable) {
return new ServiceProviderClient() {
@Override
public String hello() {
return "Fallback: " + throwable.getMessage();
}
};
}
}
```
7. 创建ServiceProviderClientFallback类,用于定义Feign客户端的fallback逻辑
```java
@Component
public class ServiceProviderClientFallback implements ServiceProviderClient {
@Override
public String hello() {
return "Fallback: Service Provider is not available";
}
}
```
8. 在application.properties中配置Eureka和Feign
```properties
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
feign.client.config.default.connectTimeout=5000
feign.client.config.default.readTimeout=5000
```
9. 启动Eureka服务器和服务提供者,然后启动服务消费者,访问http://localhost:8080/hello即可看到服务提供者返回的结果。
希望这个例子能够帮助到您!