常见的IOException子类及其使用场景：

IOException常用子类

EOFException

  • 场景：当期望从输入流中读取更多数据时，但已到达流的末尾。

  • 示例：

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    try (DataInputStream dis = new DataInputStream(new FileInputStream("file.txt"))) {
        while (true) {
            int data = dis.readInt();
            // Handle data...
        }
    } catch (EOFException e) {
        // End of file reached
    } catch (IOException e) {
        // Other IO error handling
    }

FileNotFoundException

  • 场景：尝试打开一个不存在的文件时。

  • 示例：

    1
    2
    3
    4
    5
    6
    7
    try (BufferedReader br = new BufferedReader(new FileReader("nonexistentfile.txt"))) {
        // Read from the file
    } catch (FileNotFoundException e) {
        // File does not exist or cannot be opened
    } catch (IOException e) {
        // Other IO error handling
    }

SocketException

  • 场景：在网络通信中，当套接字出现错误时，例如 TCP 错误。

  • 示例：

    1
    2
    3
    4
    5
    6
    7
    try (Socket socket = new Socket("example.com", 80)) {
        // Use the socket for communication
    } catch (SocketException e) {
        // Handle socket error
    } catch (IOException e) {
        // Other IO error handling
    }

UnknownHostException

  • 场景：当试图连接到一个未知的主机时。

  • 示例：

    1
    2
    3
    4
    5
    6
    7
    8
    try {
        InetAddress address = InetAddress.getByName("unknownhost.com");
        // Use the InetAddress object
    } catch (UnknownHostException e) {
        // Handle unknown host
    } catch (IOException e) {
        // Other IO error handling
    }

InterruptedIOException

  • 场景：当IO操作被线程中断时。

  • 示例：

    1
    2
    3
    4
    5
    6
    7
    try (InputStream in = new InterruptibleInputStream()) {
        // Perform IO operations that can be interrupted
    } catch (InterruptedIOException e) {
        // Handle interrupted IO
    } catch (IOException e) {
        // Other IO error handling
    }

UnsupportedEncodingException

  • 场景：当指定了一个不被支持的字符编码时。

  • 示例：

    1
    2
    3
    4
    5
    6
    try {
        byte[] bytes = "example".getBytes("UTF-8");
        // Use the bytes
    } catch (UnsupportedEncodingException e) {
        // Handle unsupported encoding
    }