handlersocketjava里显示，“类没有主方法”

handlersocket 时间:2021-06-21 阅读:()

charging socket是什么意思

charging socket的中文翻译　　charging socket 　　充电插座　　双语例句　　1 　　The fool-proofing power battery charging socket is installed under the original petrol filling cover, the driver could easily plug the socket to charge battery without any mistake. 　　有防呆设计动力电池充电插座放置在原车加油孔盖之位置，使驾驶者方便插入插座让电池充电且不会弄错。

　　2 　　The charge of the electrical equipment is usually provided through charging plugs and socket conducted. 　　电力设备的充电一般是通过插头和插座的连接来进行的。

C# BeginReceive（）函数

在各种行为的回调函数中，所对应的socket都从输入参数的AsyncState属性获得。

使用（Socket）或者（StateObject）进行强制转换。

BeginReceive函数使用的容器为state，因为它需要存放传送的数据。

而其余接收或发送函数的容器为socket也可。

代码如下： ? using?System; ?using?System.Net; ?using?System.Net.Sockets; using?System.Text; using?System.Threading; //?State?object?for?reading?client?data?asynchronously public?class?StateObject { ????//?Client??socket. ????public?Socket?workSocket?=?null; ????//?Size?of?receive?buffer. ????public?const?int?BufferSize?=?1024; ????//?Receive?buffer. ????public?byte[]?buffer?=?new?byte[BufferSize]; ????//?Received?data?string. ????public?StringBuilder?sb?=?new?StringBuilder(); } public?class?AsynchronousSocketListener { ????//?Thread?signal. ????public?static?ManualResetEvent?allDone?=?new?ManualResetEvent(false); ????public?AsynchronousSocketListener() ????{ ????} ????public?static?void?StartListening() ????{ ????????//?Data?buffer?for?ing?data. ????????byte[]?bytes?=?new?Byte[1024]; ????????//?Establish?the?local?endpoint?for?the?socket. ????????//?The?DNS?name?of?puter ????????//?running?the?listener?is?"". ????????//IPHostEntry?ipHostInfo?=?Dns.Resolve(Dns.GetHostName()); ????????IPAddress?ipAddress?=?IPAddress.Parse("192.168.1.104"); ????????IPEndPoint?localEndPoint?=?new?IPEndPoint(ipAddress,?11000); ????????//?Create?a?TCP/IP?socket. ????????Socket?listener?=?new?Socket(AddressFamily.InterNetwork, ????????????SocketType.Stream,?ProtocolType.Tcp); ????????//?Bind?the?socket?to?the?local?endpoint?and?listen?for?ing?connections. ????????try ????????{ ????????????listener.Bind(localEndPoint); ????????????listener.Listen(100); ????????????while?(true) ????????????{ ????????????????//?Set?the?event?to?nonsignaled?state. ????????????????allDone.Reset(); ????????????????//?Start?an?asynchronous?socket?to?listen?for?connections. ????????????????Console.WriteLine("Waiting?for?a?connection"); ????????????????ept( ????????????????????new?AsyncCallback(eptCallback), ????????????????????listener); ????????????????//?Wait?until?a?connection?is?made?before?continuing. ????????????????allDone.WaitOne(); ????????????} ????????} ????????catch?(Exception?e) ????????{ ????????????Console.WriteLine(e.ToString()); ????????} ????????Console.WriteLine(" Press?ENTER?to?continue"); ????????Console.Read(); ????} ????public?static?void?eptCallback(IAsyncResult?ar) ????{ ???????//?Signal?the?main?thread?to?continue. ????????allDone.Set(); ????????//?Get?the?socket?that?handles?the?client?request. ????????Socket?listener?=?(Socket)ar.AsyncState; ????????Socket?handler?=?ept(ar); ????????//?Create?the?state?object. ????????StateObject?state?=?new?StateObject(); ????????state.workSocket?=?handler; ????????handler.BeginReceive(state.buffer,?0,?StateObject.BufferSize,?0,?new?AsyncCallback(ReadCallback),?state); ????} ????public?static?void?ReadCallback(IAsyncResult?ar) ????{ ????????String?content?=?String.Empty; ????????//?Retrieve?the?state?object?and?the?handler?socket ????????//?from?the?asynchronous?state?object. ????????StateObject?state?=?(StateObject)ar.AsyncState; ????????Socket?handler?=?state.workSocket; ????????//?Read?data?from?the?client?socket.? ????????int?bytesRead?=?handler.EndReceive(ar); ????????if?(bytesRead?>?0) ????????{ ????????????//?There??might?be?more?data,?so?store?the?data?received?so?far. ????????????state.sb.Append(Encoding.ASCII.GetString( ????????????????state.buffer,?0,?bytesRead)); ????????????//?Check?for?end-of-file?tag.?If?it?is?not?there,?read? ????????????//?more?data. ????????????content?=?state.sb.ToString(); ????????????if?(content.IndexOf("")?>?-1) ????????????{ ????????????????//?All?the?data?has?been?read?from?the? ????????????????//?client.?Display?it?on?the?console. ????????????????Console.WriteLine("Read?{0}?bytes?from?socket.? ?Data?:?{1}",content.Length,?content); ????????????????//?Echo?the?data?back?to?the?client. ????????????????Send(handler,?content); ????????????} ????????????else ????????????{ ????????????????//?Not?all?data?received.?Get?more. ????????????????handler.BeginReceive(state.buffer,?0,?StateObject.BufferSize,?0,?new?AsyncCallback(ReadCallback),?state); ????????????} ????????} ????} ????private?static?void?Send(Socket?handler,?String?data) ????{ ????????//?Convert?the?string?data?to?byte?data?using?ASCII?encoding. ????????byte[]?byteData?=?Encoding.ASCII.GetBytes(data); ????????//?Begin?sending?the?data?to?the?remote?device. ????????handler.BeginSend(byteData,?0,?byteData.Length,?0, ????????????new?AsyncCallback(SendCallback),?handler); ????} ????private?static?void?SendCallback(IAsyncResult?ar) ????{ ????????try ????????{ ????????????//?Retrieve?the?socket?from?the?state?object. ????????????Socket?handler?=?(Socket)ar.AsyncState; ????????????//?Complete?sending?the?data?to?the?remote?device. ????????????int?bytesSent?=?handler.EndSend(ar); ????????????Console.WriteLine("Sent?{0}?bytes?to?client.",?bytesSent); ????????????handler.Shutdown(SocketShutdown.Both); ????????????handler.Close(); ????????} ????????catch?(Exception?e) ????????{ ????????????Console.WriteLine(e.ToString()); ????????} ????} ????public?static?int?Main(String[]?args) ????{ ????????StartListening(); ????????return?0; ????} }

如何关闭一个正在accept的ServerSocket

加入一个ServerSocket正在另一个线程堵塞ept，那如何停止ept或者关闭Socket？ Server socket 设置下超时 setSoTimeout 然后在Listen线程中用interrupt 其实直接close socket也可以，不过会抛出异常，我的意思是有什么比较安全而又简单的办法？难道要加一个标志，然后要关闭的时候把标志设为，然后连接listernSocket？这样也未免太麻烦了 JDK5.0里面新增了java.util.concurrent包（对于多线程的开发建议尽量使用这个包），下面是javadoc里面的样例代码用法示例下面给出了一个网络服务的简单结构，这里线程池中的线程作为传入的请求。

它使用了预先配置的 Executors.newFixedThreadPool(int) 工厂方法： java 代码 class NetworkService implements Runnable { private final ServerSocket serverSocket; private final ExecutorService pool; public NetworkService(int port, int poolSize) throws IOException { serverSocket = new ServerSocket(port); pool = Executors.newFixedThreadPool(poolSize); } public void run() { // run the service try { for (;;) { pool.execute(new Handler(ept())); } } catch (IOException ex) { pool.shutdown(); } } } class Handler implements Runnable { private final Socket socket; Handler(Socket socket) { this.socket = socket; } public void run() { // read and service request on socket } } 下列方法分两个阶段关闭 ExecutorService。

第一阶段调用 shutdown 拒绝传入任务，然后调用 shutdownNow（如有必要）取消所有遗留的任务： java 代码 void shutdownAndAwaitTermination(ExecutorService pool) { pool.shutdown(); // Disable new tasks from being submitted try { // Wait a while for existing tasks to terminate if (!pool.awaitTermination(60, TimeUnit.SECONDS)) { pool.shutdownNow(); // Cancel currently executing tasks // Wait a while for tasks to respond to being cancelled if (!pool.awaitTermination(60, TimeUnit.SECONDS)) System.err.println("Pool did not terminate"); } } catch (InterruptedException ie) { // (Re-)Cancel if current thread also interrupted pool.shutdownNow(); // Preserve interrupt status Thread.currentThread().interrupt(); } } 内存一致性效果：线程中向 ExecutorService 提交 Runnable 或 Callable 任务之前的操作 happen-before 由该任务所提取的所有操作，后者依次 happen-before 通过 Future.get() 获取的结果。