Java中IO流的高效数据读写实践案例

原创男娘i 2024-09-10 13:18 81阅读 0赞

在Java中，IO流是处理输入输出操作的主要方式。以下是一些高效数据读写实践案例：

1. **文件读写**：
```java
import java.io.*;

public class FileReadWrite {
    public static void main(String[] args) {
        // 文件写入
        try (FileWriter writer = new FileWriter("output.txt")) {
            writer.write("Hello, World!");
        } catch (IOException e) {
            e.printStackTrace();
        }

// 文件读取
        try (BufferedReader reader = new BufferedReader(new FileReader("output.txt")))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
```
2. **网络数据读写**：
```java
import java.io.*;
import java.net.*;

public class NetworkReadWrite {
    public static void main(String[] args) {
        // 发送数据到服务器
        try (Socket socket = new Socket("localhost", 1234));) {
            OutputStream outputStream = socket.getOutputStream();
            outputStream.write("Hello from Server!".getBytes());
            outputStream.flush();
            System.out.println("Sent data to server");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Failed to send data to server");
        }

// 从服务器接收数据
        try (Socket socket = new Socket("localhost", 1234)); BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream())))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            System.out.println("Received data from server");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Failed to receive data from server");
        }
    }
}
```
以上案例展示了如何高效地在Java中进行文件和网络数据的读写。