java 中协议_Java 中的tcp协议

传输控制协议(TCP，Transmission Control Protocol)是一种面向连接的、可靠的、基于字节流的传输层通信协议，由IETF的RFC 793 [1] 定义。

建立2个类 TcpServer TcpClient

public class TcpServer {

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

//创建一个socket的链接

ServerSocket serverSocket =new ServerSocket(8888);

System.out.println("tcp server is started......");

//无线循环

while (true) {

//等待客户端请求 如果有请求 分配一个socket

Socket socket =  serverSocket.accept();

//构建一个bufferreader对象

BufferedReader bufferedReader =new BufferedReader(new             InputStreamReader(socket.getInputStream()));

String buffer =null;

//读取每一行数据

while ((buffer = bufferedReader.readLine()) !=null && !buffer.equals("")) {

System.out.println("buffer: " + buffer);

}

//通过sockerr对象构造输出流

BufferedWriter bufferedWriter =new BufferedWriter(new         OutputStreamWriter(socket.getOutputStream()));

//模拟http请求头信息

bufferedWriter.write("HTTP/1.1 200 ok \r\n Content-Type:text/html \r\n charset=UTF-8 \r\n\r\n");

//html体

bufferedWriter.write("

http请求

this is http                        request

");

//刷新数据流使得数据马上发送

bufferedWriter.flush();

//关闭请求

bufferedWriter.close();

bufferedReader.close();

socket.close();

}

}

}

浏览器端测试如下：

public class TcpClient {

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

String msg ="hello smile";

//创建一个socket建立一个连接

Socket socket =new Socket("127.0.0.1", 8888);

//创建一个printWriter 读写器

PrintWriter printWriter =new PrintWriter(socket.getOutputStream());

//发送数据

printWriter.println(msg);

//刷新让服务马上获得数据

printWriter.flush();

socket.close();

}

}

客户端测试如下：