关于java TCP 协议中流的问题

[caosai1023]

新手纠结这个问题

为什么第一组写法没有问题，第二种写法就出现这样的错误

java.net.SocketException: Connection reset

	at java.net.SocketInputStream.read(Unknown Source)
	at java.net.SocketInputStream.read(Unknown Source)
	at java.net.SocketInputStream.read(Unknown Source)
	at network.server.main(server.java:33)

服务端

public class server {
	public static void main(String[] args) {
		
		
		
		try {
			ServerSocket sever=new ServerSocket(8888);
			
			Socket c1=sever.accept();
			System.out.println("接受一个链接");
			
			
//	                        第一组写法	
//			DataInputStream in=new DataInputStream( c1.getInputStream()) ;
//			System.out.println(in.readUTF());

			
			
//          第二组写法
			InputStream in= c1.getInputStream();
			byte [] b=new byte [32];
		
			while((in.read(b))!=-1){
				
				System.out.println(new String (b));
			}
			
			
			
			
			
			
		
			
			
			

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("输出完成");
		
	}

	

}

客户端

package network;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class client {
public static void main(String[] args) {
	try {
		Socket client =new Socket("localhost",8888);

		String mssage= "给服务器";
		
		
//      第一组写法		
//		DataOutputStream ot = new DataOutputStream(client.getOutputStream());
//		ot.writeUTF(a);
//		ot.flush();
//
//	
//	

//      第二组写法		
		OutputStream ot=client.getOutputStream();

		ot.write(mssage.getBytes());
			
		ot.flush();

		
		
		

		

		
		
	} catch (UnknownHostException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();  
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
	

	

}
}