看看为啥子是个死循环

大家帮我看看 为啥子是个死循环 ，while(info!=null)才执行  客户端就发了 一条字符串 ，为啥子是无限读取

服务端

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.ServerSocket;

import java.net.Socket;

public class Server {

public static void main(String[] args)

{

try {

ServerSocket sersoc=new ServerSocket(9999);

System.out.print("服务器正在启动等待链接");

Socket soc=sersoc.accept();

InputStream is=soc.getInputStream();

BufferedReader isr=new BufferedReader(new InputStreamReader(is));

String info=null;

info=isr.readLine();

while(info!=null)

{

System.out.print("服务器接受的内容"+info+"\n");

}

soc.shutdownInput();

sersoc.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

客户端：
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
 
public class client {
public static void main(String[] args)
{
Socket soc=null;
try {
soc = new Socket("localhost",9999);
OutputStream os=soc.getOutputStream();
PrintWriter osw=new PrintWriter(os);
osw.write("我是客户端 ");
osw.flush();
soc.shutdownOutput();
soc.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
 
}