Java中的IO流操作：文件读写、网络通信示例

原创超、凢脫俗 2024-11-09 16:06 23阅读 0赞

Java中的IO流操作是处理输入输出的基础，包括文件读写和网络通信。以下是一些基本的示例代码，展示如何在Java中进行文件读写和网络通信。

### 文件读写####1.写入文件```javaimport java.io.FileWriter;
import java.io.IOException;

public class FileWriteExample {
 public static void main(String[] args) {
String data = "Hello, this is a test data for file writing.";
 try (FileWriter file = new FileWriter("example.txt")) {
 file.write(data);
 System.out.println("File write operation completed successfully.");
} catch (IOException e) {
 System.out.println("An error occurred.");
e.printStackTrace();
 }
 }
}
```####2.读取文件```javaimport java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileReadExample {
 public static void main(String[] args) {
 try (BufferedReader br = new BufferedReader(new FileReader("example.txt"))) {
String line;
 while ((line = br.readLine()) != null) {
 System.out.println(line);
 }
} catch (IOException e) {
 System.out.println("An error occurred.");
e.printStackTrace();
 }
 }
}
```###网络通信####1. 使用Socket进行网络通信客户端：

```javaimport java.io.*;
import java.net.*;

public class Client {
 public static void main(String[] args) {
 try (Socket socket = new Socket("localhost",1234);
 PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
 BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in))) {
String userInput;
 while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
 System.out.println("Server response: " + in.readLine());
 }
} catch (IOException e) {
e.printStackTrace();
 }
 }
}
```服务器端：

```javaimport java.io.*;
import java.net.*;

public class Server {
 public static void main(String[] args) {
 try (ServerSocket serverSocket = new ServerSocket(1234)) {
 System.out.println("Server is running and waiting for client connection...");
Socket socket = serverSocket.accept();
 try (BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
 BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in))) {
String userInput;
 while ((userInput = in.readLine()) != null) {
 System.out.println("Client says: " + userInput);
String serverResponse = stdIn.readLine();
out.println(serverResponse);
 }
 }
} catch (IOException e) {
e.printStackTrace();
 }
 }
}
```这些示例提供了Java中文件读写和网络通信的基本框架。在实际应用中，你可能需要根据具体需求进行调整和扩展。