InputStreamReader抛出IOException

Question

我正在尝试使用InputStreamReader来读取套接字发送的字节 我有

InputStreamReader in = new InputStreamReader(socket.getInputStream());
in.read();

这会抛出一个IOException :(。我知道套接字应该发送一些东西，但它一直在抛出错误。

Answer 1

实际的错误消息和堆栈跟踪确实很有用。

您可以尝试使用BufferedReader并使用readLine来确保获得某些内容。enter link description here

Answer 2

import java.io.*;
import java.net.*;

public class EchoClient {
    public static void main(String[] args) throws IOException {

        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;

        try {
            echoSocket = new Socket("taranis", 7);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(
                                        echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: taranis.");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for "
                               + "the connection to: taranis.");
            System.exit(1);
        }

    BufferedReader stdIn = new BufferedReader(
                                   new InputStreamReader(System.in));
    String userInput;

    while ((userInput = stdIn.readLine()) != null) {
        out.println(userInput);
        System.out.println("echo: " + in.readLine());
    }

    out.close();
    in.close();
    stdIn.close();
    echoSocket.close();
    }
}

找到here

Answer 3

这是预期的行为，IOException表示没有要读取的内容，很可能是套接字未正确连接。这个问题应该关闭。