TCP编程遇到运行异常

Question

你好，在运行client时提示有运行异常，指向socket.shutdownOutput();这一行，很奇怪的是，我把bos.close();这一行放到末尾一行的时候，又没有异常了，请问这个输出流应该什么时候关闭，用完了不就可以关闭了吗，为什么放末行就不报异常了，好奇怪呀，蟹蟹

```java
package upload;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPFileUploadServer {
    public static void main(String[] args) throws Exception{
        ServerSocket serverSocket = new ServerSocket(8888);
        System.out.println("sever in 8888 ing");
        Socket socket = serverSocket.accept();
        BufferedInputStream bis = new BufferedInputStream(socket.getInputStream());
        String destPath = "f:\\tower";
        byte[] bytes = StreamUtils.streamToByteArray(bis);
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destPath));
        bos.write(bytes);
        bos.close();
        System.out.println("save successful");
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
        bw.write("收到图片");
        //bw.newLine();
        bw.flush();
        socket.shutdownOutput();
        System.out.println("发送完成");
        bw.close();
        socket.close();
        serverSocket.close();
    }
}

```java
package upload;

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;

public class TCPFileUploadClient {
    public static void main(String[] args) throws Exception{
        Socket socket = new Socket(InetAddress.getLocalHost(), 8888);
        String filePath = "e:\\tower.jpg";
        BufferedInputStream bis = new BufferedInputStream
                (new FileInputStream(filePath));
        byte[] bytes = StreamUtils.streamToByteArray(bis);
        BufferedOutputStream bos = new BufferedOutputStream
                (socket.getOutputStream());
        bos.write(bytes);
        bos.close();
        bis.close();
        socket.shutdownOutput();
        //BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        InputStream inputStream = socket.getInputStream();
        String s=StreamUtils.streamToString(inputStream);

        System.out.println(s);
        inputStream.close();
        socket.close();
    }
}

Answer 1

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