Connection reset by peer: socket write error；

服务端代码：

package qqa;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Servlet_machine {
	public static void main(String[] args) {
		Socket accept = null;
		try {
			ServerSocket sso = new ServerSocket(9999);
			System.out.println("服务端启动成功");
			accept = sso.accept();
			System.out.println("连接成功");
			InputStream in = accept.getInputStream();
			
			

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

客户端

package qqa;

import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;

public class Client_machine {
	
	public static void main(String[] args) {
        try {
			Socket socket=new Socket("localhost",9999);
			@SuppressWarnings("resource")
			Scanner sc=new Scanner(System.in);
			System.out.println("请输入要发送的内容");
			String s=sc.nextLine();
		    byte[] bt=new byte[1024];
		    bt=s.getBytes();
		    socket.getOutputStream().write(bt);
			System.out.println("发送成功");
			
			
		} catch (IOException e) {
			
			e.printStackTrace();
		}
        
	}
}

解决办法：
服务端关闭socket流就可以了；