Java Socket shutdownInput() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 shutdownInput() 方法会将指定套接字的输入流定位到流的末尾。当在套接字上调用此方法时，流的 available 方法将返回 0，并且其 read 方法将返回 -1（流结束）。

语法

参数

不适用

抛出

IOException - 如果在关闭给定套接字时发生 I/O 错误

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketShutDownInputExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the socket with inetAddress and port
        socket.bind(socketAddress);
        //the connection will not establish without binding the socket with bind() method
        socket.connect(socketAddress);
        //shutdownInput() places the input stream for the specified socket at the end of the stream
        socket.shutdownInput();
        //isConnected() method returns the connected state of the socket
        System.out.println("The socket is connected: "+socket.isConnected());
        //isBound() method returns the binding state of the socket
        System.out.println("The socket is bounded: "+socket.isBound());
        //isInputShutdown() returns if the read-half of the socket connection is closed or not.
        System.out.println("Input is shutdown: "+socket.isInputShutdown());
    }
}

输出

Output
The socket is connected: true
The socket is bounded: true
Input is shutdown: true

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketShutDownInputExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the socket with inetAddress and port
        socket.bind(socketAddress);
        //the connection will not establish without binding the socket with bind() method
        socket.connect(socketAddress);
        //shutdownInput() places the input stream for the specified socket at the end of the stream
        socket.shutdownInput();
        //socket is closed
        socket.close();
        //isConnected() method returns the connected state of the socket
        //It will continue to return the connection state that was prior to being closed.
        System.out.println("The socket is connected: "+socket.isConnected());
        //isBound() method returns the binding state of the socket
        System.out.println("The socket is bounded: "+socket.isBound());
        //isInputShutdown() returns if the read-half of the socket connection is closed or not.
        System.out.println("Input is shutdown: "+socket.isInputShutdown());
    }
}

输出

The socket is connected: true
The socket is bounded: true
Input is shutdown: true

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketShutDownInputExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //the socket should be connected
        //shutting down the input
        socket.shutdownInput();
        //isInputShutdown() returns a Boolean value indicating if the read-half of the socket connection is closed.
        System.out.println("Input is shutdown: "+socket.isInputShutdown());
    }
}

输出

Exception in thread "main" java.net.SocketException: Socket is not connected
	at java.net.Socket.shutdownInput(Socket.java:1523)
	at com.tpointtech.JavaSocketShutdownInputExample3.main(JavaSocketShutdownInputExample3.java:11)

下一主题Java Socket 类

Java Socket shutdownInput() 方法

语法

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Java Socket shutdownInput() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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