多发多收

发送数据
//1.创建Socket对象
//细节:在创建对象的同时会链接服务端
//    如果链接不上,代码会报错
Socket socket = new Socket("127.0.0.1",10000);
//2.可以从连接通道中获取输出流
OutputStream os = socket.getOutputStream();
//写出数据
os.write("hello".getBytes());
//释放资源
os.close();
socket.close();

接收数据

 //1.接收数据
 //创建对象ServerSocket
 ServerSocket ss = new ServerSocket(10000);
 //监听客户端的链接
 Socket socket = ss.accept();
 //从链接通道中获取输入流读取数据
 InputStream is = socket.getInputStream();
//字节流转换为字符流 能更快传输数据
 InputStreamReader isr = new InputStreamReader(is);
 //字符缓冲流
 BufferedReader br = new BufferedReader(isr);
 int b = 0;
 while ((b = br.read()) != -1) {
     System.out.print((char) b);
 }
 //释放资源
 socket.close();
 ss.close();