Java Socket getInputStream() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 getInputStream() 方法返回给定套接字的输入流。如果关闭返回的 InputStream，则它将关闭关联的套接字。

语法

参数

不适用

getInputStream() 返回一个输入流，用于从该套接字读取字节。

抛出

IOException - 如果在创建输入流时发生输入/输出错误，或者套接字已关闭，或者给定的套接字未连接，或者套接字的输入已通过 shutdownInput() 关闭。

示例 1

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.*;
public class JavaSocketGetInputStreamExample1  {
    public static void main(String[] args) throws IOException {
        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 the inetAddress and port number
        socket.bind(socketAddress);
        //connect() method connects the specified socket to the server
        socket.connect(socketAddress);
        DataInputStream inputStream=new DataInputStream(
                new BufferedInputStream(socket.getInputStream()));
        System.out.println("Input Stream: "+inputStream);
    }
 }

输出

Input Stream: java.io.DataInputStream@1540e19d

示例 2

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.*;
public class JavaSocketGetInputStreamExample2  {
    public static void main(String[] args) throws IOException {
        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 the inetAddress and port number
        socket.bind(socketAddress);
        //connect() method connects the specified socket to the server
        socket.connect(socketAddress);
        //closing the socket
        socket.close();
        //getInputStream() returns an input stream for the given socket
        //An Input/Output error occurs as this socket is closed 
        DataInputStream inputStream=new DataInputStream(
                new BufferedInputStream(socket.getInputStream()));
        System.out.println("Input Stream: "+inputStream);
    }
 }

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.getInputStream(Socket.java:903)
	at com.tpointtech.JavaSocketGetInputStreamExample2.main(JavaSocketGetInputStreamExample2.java:24)

示例 3

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.*;
public class JavaSocketGetInputStreamExample3  {
    public static void main(String[] args) throws IOException {
        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 the inetAddress and port number
        socket.bind(socketAddress);
        //getInputStream() returns an input stream for the given socket
        //An Input/Output error occurs as this socket is not connected
        DataInputStream inputStream=new DataInputStream(
                new BufferedInputStream(socket.getInputStream()));
        System.out.println("Input Stream: "+inputStream);
    }
 }

输出

Exception in thread "main" java.net.SocketException: Socket is not connected
	at java.net.Socket.getInputStream(Socket.java:905)
	at com.tpointtech.JavaSocketGetInputStreamExample3.main(JavaSocketGetInputStreamExample3.java:20)

下一主题Java Socket 类

Java Socket getInputStream() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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Java Socket getInputStream() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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