无法使用 Kubernetes 中的 Dapr Pubsub 块将消息发布到 RabbitMQ

如何解决无法使用 Kubernetes 中的 Dapr Pubsub 块将消息发布到 RabbitMQ

我正在使用 Dapr .NET SDK 并使用 PublishAsync 方法将消息发布到 RabbitMQ

我希望消息能顺利发布。我在 Kubernetes 中使用它。代码可以在 DaprPubsub

找到

RabbitMQ 的配置很完美。组件定义是完美的。 Dapr SDK 可以到达RabbitMQ。实际上,在 RabbitMQ 交换中,我能够使用主题名称名称创建 find an exchange,但是没有创建队列,并且我打算放入队列的消息没有添加到队列中。 使用上面提供的代码链接local K8s cluster 上重现问题的步骤如下

  1. 使用 RabbitMQKubernetes 集群中安装 Helm Link
  2. 使用 AMQP 配置更新组件文件
  3. 将组件应用在与代码相同的命名空间中
  4. 部署代码
  5. 执行Kubectl获取svc,获取服务daprpub的Loadbalancer外部IP。端口将为 5045。
  6. 假设外部 IP 类似于 localHost。访问网址 作为 http://localHost:5045/swagger。将显示 swagger 页面
  7. 在 Swagger UI 中访问 Put in queue 方法。该方法无异常地执行。

其他日志

[40m[37mdbug[39m[22m[49m: Microsoft.Extensions.Hosting.Internal.Host[1]
      Hosting starting
[40m[32minfo[39m[22m[49m: Microsoft.Hosting.Lifetime[0]
      Now listening on: http://[::]:80
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[0]
      Loaded hosting startup assembly DaprPub
[40m[32minfo[39m[22m[49m: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
[40m[32minfo[39m[22m[49m: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
[40m[32minfo[39m[22m[49m: Microsoft.Hosting.Lifetime[0]
      Content root path: /app
[40m[37mdbug[39m[22m[49m: Microsoft.Extensions.Hosting.Internal.Host[2]
      Hosting started
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[6]
      Connection id "0HMAFT1T14KEF" received FIN.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEF" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEF" started.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEG" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEG" started.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEF" sending FIN because: "The client closed the connection."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEF" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEF" stopped.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://127.0.0.1:80/dapr/config application/json -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[0]
      Wildcard detected,all requests with hosts will be allowed.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1000]
      No candidates found for the request path '/dapr/config'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[2]
      Request did not match any endpoints
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[3]
      The request path  does not match the path filter
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEG" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://127.0.0.1:80/dapr/config application/json - - 404 0 - 43.9120ms
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://127.0.0.1:80/dapr/subscribe application/json -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
      1 candidate(s) found for the request path '/dapr/subscribe'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[1]
      Request matched endpoint 'dapr/subscribe HTTP: GET'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[15]
      Static files was skipped as the request already matched an endpoint.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'dapr/subscribe HTTP: GET'
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'dapr/subscribe HTTP: GET'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEG" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://127.0.0.1:80/dapr/subscribe application/json - - 200 - application/json 14.5314ms
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[6]
      Connection id "0HMAFT1T14KEG" received FIN.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEG" sending FIN because: "The client closed the connection."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEG" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEG" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEH" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEH" started.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEI" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEI" started.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5045/dapr/subscribe - -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
      1 candidate(s) found for the request path '/dapr/subscribe'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[1]
      Request matched endpoint 'dapr/subscribe HTTP: GET'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[15]
      Static files was skipped as the request already matched an endpoint.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'dapr/subscribe HTTP: GET'
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'dapr/subscribe HTTP: GET'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEH" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5045/dapr/subscribe - - - 200 - application/json 1.3339ms
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[6]
      Connection id "0HMAFT1T14KEI" received FIN.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEI" sending FIN because: "The client closed the connection."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEI" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEI" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEH" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEH" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEH" sending FIN because: "The Socket transport's send loop completed gracefully."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEJ" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEJ" started.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEK" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEK" started.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5045/swagger/index.html - -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1000]
      No candidates found for the request path '/swagger/index.html'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[2]
      Request did not match any endpoints
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEJ" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5045/swagger/index.html - - - 200 - text/html;charset=utf-8 66.3495ms
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5045/swagger/v1/swagger.json - -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1000]
      No candidates found for the request path '/swagger/v1/swagger.json'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[2]
      Request did not match any endpoints
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEJ" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5045/swagger/v1/swagger.json - - - 200 - application/json;charset=utf-8 34.8034ms
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5045/api/Publish/PutInQueue - -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
      1 candidate(s) found for the request path '/api/Publish/PutInQueue'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
      Endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)' with route pattern 'api/Publish/PutInQueue' is valid for the request path '/api/Publish/PutInQueue'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[1]
      Request matched endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[15]
      Static files was skipped as the request already matched an endpoint.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.ModelBinding.ModelBinderFactory[12]
      Registered model binder providers,in the following order: Dapr.AspNetCore.StateEntryModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.BinderTypeModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ServicesModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.BodyModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.HeaderModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.FloatingPointTypeModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.EnumTypeModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.DateTimeModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.SimpleTypeModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.CancellationTokenModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ByteArrayModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.FormFileModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.FormCollectionModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.keyvaluePairModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.DictionaryModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ArrayModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.CollectionModelBinderProvider,Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexObjectModelBinderProvider
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[3]
      Route matched with {action = "GetDapr",controller = "Publish"}. Executing controller action with signature System.Threading.Tasks.Task`1[Microsoft.AspNetCore.Mvc.IActionResult] GetDapr() on controller DaprPub.Controllers.PublishController (DaprPub).
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Execution plan of authorization filters (in the following order): None
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Execution plan of resource filters (in the following order): None
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Execution plan of action filters (in the following order): Microsoft.AspNetCore.Mvc.ModelBinding.UnsupportedContentTypeFilter (Order: -3000),Microsoft.AspNetCore.Mvc.Infrastructure.ModelStateInvalidFilter (Order: -2000)
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Execution plan of exception filters (in the following order): None
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Execution plan of result filters (in the following order): Microsoft.AspNetCore.Mvc.Infrastructure.ClientErrorResultFilter (Order: -2000)
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[1]
      Executing controller factory for controller DaprPub.Controllers.PublishController (DaprPub)
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
      Executed controller factory for controller DaprPub.Controllers.PublishController (DaprPub)
[40m[32minfo[39m[22m[49m: DaprPub.Controllers.PublishController[0]
      Successfully published message in queue
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Mvc.StatusCodeResult[1]
      Executing HttpStatusCodeResult,setting HTTP status code 200
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
      Executed action DaprPub.Controllers.PublishController.GetDapr (DaprPub) in 98.2819ms
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEJ" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5045/api/Publish/PutInQueue - - - 200 0 - 128.8929ms
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[6]
      Connection id "0HMAFT1T14KEK" received FIN.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEK" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEK" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEK" sending FIN because: "The Socket transport's send loop completed gracefully."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEJ" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEJ" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEJ" sending FIN because: "The Socket transport's send loop completed gracefully."
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HMAFT1T14KEL" accepted.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HMAFT1T14KEL" started.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5045/api/Publish/PutInQueue - -
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
      1 candidate(s) found for the request path '/api/Publish/PutInQueue'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
      Endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)' with route pattern 'api/Publish/PutInQueue' is valid for the request path '/api/Publish/PutInQueue'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware[1]
      Request matched endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[15]
      Static files was skipped as the request already matched an endpoint.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[3]
      Route matched with {action = "GetDapr",setting HTTP status code 200
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
      Executed action DaprPub.Controllers.PublishController.GetDapr (DaprPub) in 4.441ms
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'DaprPub.Controllers.PublishController.GetDapr (DaprPub)'
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HMAFT1T14KEL" completed keep alive response.
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5045/api/Publish/PutInQueue - - - 200 0 - 6.3650ms
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HMAFT1T14KEL" disconnecting.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HMAFT1T14KEL" stopped.
[40m[37mdbug[39m[22m[49m: Microsoft.AspNetCore.Server.Kestrel.Transport.sockets[7]
      Connection id "0HMAFT1T14KEL" sending FIN because: "The Socket transport's send loop completed gracefully."

版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。

相关推荐


Selenium Web驱动程序和Java。元素在(x,y)点处不可单击。其他元素将获得点击?
Python-如何使用点“。” 访问字典成员?
Java 字符串是不可变的。到底是什么意思?
Java中的“ final”关键字如何工作?(我仍然可以修改对象。)
“loop:”在Java代码中。这是什么,为什么要编译?
java.lang.ClassNotFoundException:sun.jdbc.odbc.JdbcOdbcDriver发生异常。为什么?
这是用Java进行XML解析的最佳库。
Java的PriorityQueue的内置迭代器不会以任何特定顺序遍历数据结构。为什么?
如何在Java中聆听按键时移动图像。
Java“Program to an interface”。这是什么意思?