如果长连接中断开了怎样自动重连
时间: 2023-10-02 13:09:48 浏览: 32
如果长连接中断了,可以使用以下代码示例自动重连:
```java
import java.net.*;
import java.io.*;
public class Client {
private Socket socket;
private BufferedReader in;
private PrintWriter out;
private boolean connected;
public void startConnection(String ipAddress, int port) {
try {
socket = new Socket(ipAddress, port);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
connected = true;
} catch (IOException e) {
System.out.println("Error connecting to server: " + e.getMessage());
// 如果连接失败,则等待一段时间后重新连接
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
startConnection(ipAddress, port); // 递归调用自身重新连接
}
}
public void sendMessage(String message) {
if (connected) {
out.println(message);
}
}
public void stopConnection() {
try {
in.close();
out.close();
socket.close();
connected = false;
} catch (IOException e) {
System.out.println("Error closing connection: " + e.getMessage());
}
}
public void listenForMessages() {
try {
String message;
while (connected && (message = in.readLine()) != null) {
// 处理从服务器接收到的消息
System.out.println("Received message: " + message);
}
// 如果连接断开,则等待一段时间后重新连接
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
startConnection(socket.getInetAddress().getHostAddress(), socket.getPort()); // 递归调用自身重新连接
} catch (IOException e) {
System.out.println("Error listening for messages: " + e.getMessage());
}
}
}
```
在上面的示例中,当连接建立失败时,会等待 5 秒后再次尝试连接。当连接断开时,也会等待 5 秒后重新连接。这里使用递归调用 `startConnection` 方法来实现自动重连。
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