java socket中read阻塞问题

关于socket中read方法阻塞问题

话不多说上代码-_-

客户端代码

package com.demo.test3;

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

public class Client {

    public static void main(String[] args) throws Exception {

        Socket s = new Socket("127.0.0.1", 9527);
        BufferedOutputStream out = new BufferedOutputStream(s.getOutputStream());
        out.write("hello\n".getBytes());
        out.flush();
        BufferedInputStream in = new BufferedInputStream(s.getInputStream());
        in.readAllBytes();
    }
}

服务端代码

package com.demo.test3;

import java.io.BufferedInputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class Server {

    public static void main(String[] args) throws Exception {

        ServerSocket server = new ServerSocket(9527);

        Socket s = server.accept();
        BufferedInputStream sysIn = new BufferedInputStream(s.getInputStream());
        List<Character> res = new ArrayList<>();
        int ch;
        while ((ch = sysIn.read()) != '\n') {
            if (ch == -1)
                return;
            res.add((char) ch);
        }
        System.out.println(res);
    }
}