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重新再 GitHub 上下载了 有这个jar包项目，然后进行编译了一下，最后自己在编译自己的项目，jar包就成功的下载下来了！！
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-11-21 14:10:57.174 ERROR 20164 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'documentationPluginsBootstrapper' defined in URL [jar:file:/E:/cxm/Maven/repository/io/springfox/springfox-spring-web/2.7.0/springfox-spring-web-2.7.0.jar!/springfox/documentation/spring/web/plugins/DocumentationPluginsBootstrapper.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcRequestHandlerProvider' defined in URL [jar:file:/E:/cxm/Maven/repository/io/springfox/springfox-spring-web/2.7.0/springfox-spring-web-2.7.0.jar!/springfox/documentation/spring/web/plugins/WebMvcRequestHandlerProvider.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'endpointHandlerMapping' defined in class path resource [org/springframework/boot/actuate/autoconfigure/EndpointWebMvcManagementContextConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping]: Factory method 'endpointHandlerMapping' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcEndpoints' defined in class path resource [org/springframework/boot/actuate/autoconfigure/EndpointWebMvcManagementContextConfiguration.class]: Invocation of init method failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'environmentMvcEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/EndpointWebMvcManagementContextConfiguration.class]: Unsatisfied dependency expressed through method 'environmentMvcEndpoint' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.EndpointAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.autoconfigure.EndpointAutoConfiguration$$EnhancerBySpringCGLIB$$3677cea]: Constructor threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'discoveryCompositeHealthIndicator' defined in class path resource [org/springframework/cloud/client/CommonsClientAutoConfiguration$DiscoveryLoadBalancerConfiguration.class]: Unsatisfied dependency expressed through method 'discoveryCompositeHealthIndicator' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'discoveryClientHealthIndicator' defined in class path resource [org/springframework/cloud/client/CommonsClientAutoConfiguration$DiscoveryLoadBalancerConfiguration.class]: Unsatisfied dependency expressed through method 'discoveryClientHealthIndicator' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cloud.etcd.discovery.EtcdDiscoveryClientConfiguration': Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect bean class [org.springframework.cloud.etcd.discovery.EtcdDiscoveryClientConfiguration$$EnhancerBySpringCGLIB$$54477faa] for persistence metadata: could not find class that it depends on
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1193) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:418) ~[spring-orm-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:397) ~[spring-orm-4.3.10.RELEASE.jar:4.3.10.RELEASE]
... 174 common frames omitted
Caused by: java.lang.ClassNotFoundException: mousio.etcd4j.EtcdClient
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_161]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_161]
... 181 common frames omitted
Process finished with exit code 1