TCP

server端：

ServerSocket server = new ServerSocket(1234);//设置通讯服务端端口
Socket socket = server.accept();//等待客户端响应

InputStream is = socket.getInputStream();
OutputStream os = socket.getOutputStream();
os.write("hello from server".getBytes());//先写后读

int length = 0;
byte[] buffer = new byte[1024];
while (-1 != (length  = is.read(buffer )))//等待读取内容
{
System.out.println("Server: " + new String(buffer, 0, length));
}

client客户端：

Socket socket = new Socket("127.0.0.1", 1234);//对应服务端地址和端口

OutputStream os = socket.getOutputStream();
os.write("hello from client".getBytes());

InputStream is = socket.getInputStream();
byte[] buffer = new byte[1024];
int length = 0;
while (-1 != (length  = is.read(buffer)))
{
    System.out.println("Client: " + new String(buffer, 0, length));
}

 

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