blocks|key|151306|text|您可以使用以下链接访问您的需求https://www.geeksforgeeks.org/socket-programming-in-java/+https://www.journaldev.com/741/java-socket-programming-server-client|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|151307|entityMap|0|LINK|mutability|MUTABLE|url|https://www.geeksforgeeks.org/socket-programming-in-java/|1|https://www.journaldev.com/741/java-socket-programming-server-client^0|F|1L|0|21|1W|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You could use the following links to access your requirements
<a href="https://www.geeksforgeeks.org/socket-programming-in-java/" rel="nofollow noreferrer">https://www.geeksforgeeks.org/socket-programming-in-java/</a>
<a href="https://www.journaldev.com/741/java-socket-programming-server-client" rel="nofollow noreferrer">https://www.journaldev.com/741/java-socket-programming-server-client</a>

blocks|key|3559169|text|如果不打算处理多个连接，我真的不确定为什么需要使用nio。我看不出使用它们有什么意义。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3559170|好的，现在开始:让我知道这是否有效。|3559171|服务器代码：|3559172|public+class+Server+{

ServerSocket+socket;
Socket+listener;

public+Server(int+port)+throws+IOException+{
++++socket+=+new+ServerSocket(port);
}


public+void+connect()+throws+IOException{
++++listener+=+socket.accept();
}

public+String+read()+throws+IOException{

++++byte[]+temp+=+new+byte[1024];

++++int+bytesRead+=+0;

++++try(InputStream+input+=+listener.getInputStream()){
++++++++bytesRead+=+input.read(temp);
++++}

++++return+new+String(temp,0,bytesRead,"ASCII");
}

public+void+write(String+data)+throws+IOException{
++++byte[]+temp+=+new+byte[1024];

++++try(OutputStream+out+=+listener.getOutputStream()){
++++++++out.write(data.getBytes());
++++++++out.flush();
++++}
}

public+void+close(){
++++socket.close();
}

}|code-block|syntax|javascript|3559173|客户端代码：|3559174|public+class+Client{

Socket+client;

InetSocketAddress+addr;

public+Client(String+ip,+int+port)+throws+IOException{

++++client+=+new+Socket();
++++addr+=+new+InetSocketAddress(ip,port);

}


public+void+connect()+throws+IOException{
++++client.connect(addr);
}

public+String+read()+throws+IOException{

++++byte[]+temp+=+new+byte[1024];

++++int+bytesRead+=+0;

++++try(InputStream+input+=+client.getInputStream()){
++++++++bytesRead+=+input.read(temp);
++++}

++++return+new+String(temp,0,bytesRead,"ASCII");
}

public+void+write(String+data)+throws+IOException{
++++byte[]+temp+=+new+byte[1024];

++++try(OutputStream+out+=+client.getOutputStream()){
++++++++out.write(data.getBytes());
++++++++out.flush();
++++}
}

public+void+close(){
++++client.close();
}

}|3559175|现在，您所要做的就是在服务器上调用connect()，然后在客户端上调用connect()，并编写和发送所需的消息。|3559176|完成所有操作后，不要忘记调用close。|3559177|还要注意的是，您需要一些机制来告诉服务器和客户端每条消息有多长。或者，您可以指定一个结束字符来告诉客户端/服务器消息已结束。|3559178|服务器中的一次发送不一定等于客户端中的一次读取，反之亦然。你将不得不弄清楚该怎么做。|3559179|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

Not really sure why you need to use nio if you are not going to handle multiple connections. I don't see a point in using them. 

Alright here goes: Let me know if this works. 

Server code:

<pre><code>public class Server {

ServerSocket socket;
Socket listener;

public Server(int port) throws IOException {
 socket = new ServerSocket(port);
}


public void connect() throws IOException{
 listener = socket.accept();
}

public String read() throws IOException{

 byte[] temp = new byte[1024];

 int bytesRead = 0;

 try(InputStream input = listener.getInputStream()){
 bytesRead = input.read(temp);
 }

 return new String(temp,0,bytesRead,"ASCII");
}

public void write(String data) throws IOException{
 byte[] temp = new byte[1024];

 try(OutputStream out = listener.getOutputStream()){
 out.write(data.getBytes());
 out.flush();
 }
}

public void close(){
 socket.close();
}

}
</code></pre>

Client code:

<pre><code>public class Client{

Socket client;

InetSocketAddress addr;

public Client(String ip, int port) throws IOException{

 client = new Socket();
 addr = new InetSocketAddress(ip,port);

}


public void connect() throws IOException{
 client.connect(addr);
}

public String read() throws IOException{

 byte[] temp = new byte[1024];

 int bytesRead = 0;

 try(InputStream input = client.getInputStream()){
 bytesRead = input.read(temp);
 }

 return new String(temp,0,bytesRead,"ASCII");
}

public void write(String data) throws IOException{
 byte[] temp = new byte[1024];

 try(OutputStream out = client.getOutputStream()){
 out.write(data.getBytes());
 out.flush();
 }
}

public void close(){
 client.close();
}

}
</code></pre>

Now all you have to do is call connect() on the server, then connect() on the client and write and send messages that you want.

Don't forget to call close after you are all done.

Also be aware that you are going to need some mechanism to tell the server and client how long each messages are going to be. Or you can specify an ending character that tells the client/server that the message is over. 

One send in the server does not necessarily equal one read in the client and vice versa. You are going to have to figure out what to do.

Please could you show me a small example in localhost of a client and a server that communicate using java nio? I'd need to understand how it works java nio. For example 1) client requires connection, client connects client sends "Hello i'm a client". 2) Server accepts, server receives message from client, Server responds "hello i'm a server" 3) Client sends "hello server" 4) Server sends "hello client".

I do not need the server to handle multiple clients at a time, what I need to understand is how a connection with multiple messages between client and server happens.

Simple client-server example with java nio

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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你能给我展示一个使用java nio进行通信的客户端和服务器的本地主机的小例子吗？我需要了解它是如何工作的java nio。例如: 1)客户端需要连接，客户端连接客户端发送"Hello i'm a client“。2)服务器接受，服务器接收来自客户端的消息，服务器响应"hello i'm a server“3)客户端发...

问使用java nio的简单客户端-服务器示例
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