Java Socket setSoTimeout() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 setSoTimeout() 方法可以使用给定的超时值（以毫秒为单位）来启用或禁用 SO_TIMEOUT 选项。超时值应大于 0，否则将抛出错误。

语法

参数

参数 'timeout' 表示以毫秒为单位的特定超时值。

不适用

抛出

SocketException - 如果底层协议（如 TCP 错误）存在错误。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSoTimeoutExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //integer timeout value
        int timeout=90987789;
        //setSoTimeout() method enables or disables the SO_TIMEOUT option with the given timeout value, in milliseconds.
        socket.setSoTimeout(timeout);
        //getSoTimeout() method returns the setting for SO_TIMEOUT option
        System.out.println("Timeout value: "+socket.getSoTimeout());
    }
}

输出

Timeout value: 90987789

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSoTimeoutExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //integer timeout value
        //the timeout value can be zero
        int timeout=0;
        //setSoTimeout() method enables or disables the SO_TIMEOUT option with the given timeout value, in milliseconds.
        socket.setSoTimeout(timeout);
        //getSoTimeout() method returns the setting for SO_TIMEOUT option
        System.out.println("Timeout value: "+socket.getSoTimeout());
    }
}

输出

Timeout value: 0

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSoTimeoutExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //integer timeout value
        //the timeout value should always be greater than 0, else it will throw an exception
        int timeout=-980;
        //setSoTimeout() method enables or disables the SO_TIMEOUT option with the given timeout value, in milliseconds.
        socket.setSoTimeout(timeout);
        //getSoTimeout() method returns the setting for SO_TIMEOUT option
        System.out.println("Timeout value: "+socket.getSoTimeout());
    }
}

输出

Exception in thread "main" java.lang.IllegalArgumentException: timeout can't be negative
	at java.net.Socket.setSoTimeout(Socket.java:1139)
	at com.tpointtech.JavaSocketSetSoTimeoutExample3.main(JavaSocketSetSoTimeoutExample3.java:13)

示例 4

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSoTimeoutExample4  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //integer timeout value
        //the timeout value should be greater than 0, else it will throw an exception
        int timeout=980;
        //setSoTimeout() method enables or disables the SO_TIMEOUT option with the given timeout value, in milliseconds.
        //it will throw an error, as the socket is already closed
        socket.setSoTimeout(timeout);
        //getSoTimeout() method returns the setting for SO_TIMEOUT option
        System.out.println("Timeout value: "+socket.getSoTimeout());
    }
}

立即测试

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setSoTimeout(Socket.java:1137)
	at com.tpointtech.JavaSocketSetSoTimeoutExample4.main(JavaSocketSetSoTimeoutExample3.java:16)

下一主题Java Socket 类

Java Socket setSoTimeout() 方法

语法

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Java Socket setSoTimeout() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

示例 4

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