NoClassDefFoundError: com/netflix/hystrix/contrib/javanica/aop/aspectj/HystrixCommandAspect

在Spring Cloud Feign工程中配置断路器Hystrix的时候，pom.xml文件已经加入Hystrix相关的jar：

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
		</dependency>
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Application.java:

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableHystrix
@EnableHystrixDashboard
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}
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当启动的时候，报如下错误：

Exception in thread "main" java.lang.NoClassDefFoundError: com/netflix/hystrix/contrib/javanica/aop/aspectj/HystrixCommandAspect
	at java.lang.Class.getDeclaredMethods0(Nativ
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