java 中的 java.net.ServerSocket 类
原文:https://www . geesforgeks . org/Java-net-server socket-class-in-Java/
服务器套接字类用于提供客户机/服务器套接字连接的服务器端的独立于系统的实现。如果服务器套接字的构造函数无法侦听指定的端口(例如，该端口已被使用)，它将引发异常。
所以 java.net.ServerSocket 类的应用被广泛使用，具体如下:
- 在 java.nio 通道中，serverSocket 类用于检索与该通道关联的 ServerSocket。
- 在 java.rmi.Server 中，ServerSocket 类用于在指定端口上创建服务器套接字(端口 0 表示匿名端口)。
- 在 javax.net，服务器套接字被广泛使用，以便:
- 返回未绑定的服务器套接字。
- 返回绑定到指定端口的服务器套接字。
- 返回绑定到指定端口的服务器套接字，并使用指定的连接积压。
- 返回绑定到指定端口的服务器套接字，具有指定的监听积压和本地 IP。
让我们来看一下这个类的方法，如下所示:
| 【 Method 】 | describe | | --- | --- | | accept | Listen for the connection to be established with this socket and accept it. | | 绑定(SocketAddress 端点) | Bind the server socket to a specific address (IP address and port number). | | -你好(套接字地址什么事，int backlog) | Bind the server socket to a specific address (IP address and port number). | | 关闭() | This close socket | | getChannel（） | Returns the unique ServerSocketChannel object associated with this socket, if any. | | getnetaddress() | Returns the local address of this server socket. | | getLocalPort() | Returns the port number on which the socket is listening. | | getLocalSocketAddress() | Returns the address of the endpoint to which this socket is bound, or null if it is not already bound. | | getReceiveBufferSize() | Gets the value of the SO_RCVBUF option of this server socket, that is, the suggested buffer size to be used for sockets accepted from this server socket. | | getReuseAddress() | Test whether SO_REUSEADDR is enabled. | | getSoTimeout() | Retrieve settings for SO_TIMEOUT. | | 植入插座 | A subclass of ServerSocket uses this method to override Accept () and return its own subclass [T0】 Socket. | | isBound() | Returns the binding status of the server socket. | | isClosed() | Returns the closed state of the ServerSocket. | | 设置性能首选项(内部连接时间、内部延迟、内部带宽) | Set performance preferences for this server socket. | | Set performance preferences for this server socket. | Sets the default recommended value of the SO_RCVBUF option for sockets accepted from this server socket. | | setReuseAddress(boolean on) | Enable/disable the SO_REUSEADDR socket option. | | setsxmlsocket factory(socket implfactory fac) | Set the server socket implementation factory for the application. | | int time out(内部时间输出) | Enable/disable SO_TIMEOUT with the specified timeout in milliseconds. | | toString() | Returns the implementation address and implementation port of this socket as a String. |实施:
示例 1 服务器端
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program to implement ServerSocket class
// Server Side
// Importing required libraries
import java.io.*;
import java.net.*;
// Main class
public class MyServer {
// Main driver method
public static void main(String[] args)
{
// Try block to check for exceptions
try {
// Creating an object of ServerSocket class
// in the main() method for socket connection
ServerSocket ss = new ServerSocket(6666);
// Establishing a connection
Socket soc = ss.accept();
// Invoking input stream via getInputStream()
// method by creating DataInputStream class
// object
DataInputStream dis
= new DataInputStream(s.getInputStream());
String str = (String)dis.readUTF();
// Display the string on the console
System.out.println("message= " + str);
// Lastly close the socket using standard close
// method to release memory resources
ss.close();
}
// Catch block to handle the exceptions
catch (Exception e) {
// Display the exception on the console
System.out.println(e);
}
}
}
输出:
示例 2 客户端
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program to implement ServerSocket class
// Client - side
// Importing required libraries
import java.io.*;
import java.net.*;
// Main class
public class MyClient {
// Main driver method
public static void main(String[] args)
{
// Try block to check if exception occurs
try {
// Creating Socket class object and
// initializing Socket
Socket soc = new Socket("localhost", 6666);
DataOutputStream d = new DataOutputStream(
soc.getOutputStream());
// Message to be displayed
d.writeUTF("Hello GFG Readers!");
// Flushing out internal buffers,
// optimizing for better performance
d.flush();
// Closing the connections
// Closing DataOutputStream
d.close();
// Closing socket
soc.close();
}
// Catch block to handle exceptions
catch (Exception e) {
// Print the exception on the console
System.out.println(e);
}
}
}
输出:
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