TCP
TCP
客服端
连接服务器 Socket
package com.zheng.study02;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
//客户端
public class TcpClientDemo01 {
public static void main(String[] args) {
Socket socket=null;
OutputStream os=null;
try {
//1.要知道服务器的地址,端口号
InetAddress serverIp = InetAddress.getByName("127.0.0.1");
int port=9999;
//2.创建一个socket连接
socket = new Socket(serverIp,port);
//3.发送消息 IO流
os = socket.getOutputStream();
os.write("欢迎光临".getBytes());
} catch (Exception e) {
e.printStackTrace();
}finally {
if(socket!=null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(os!=null){
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
服务器
建立服务的端口 ServerSocket
等待用户的连接 accept
接收用户的消息
package com.zheng.study02;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
//服务端
public class TcpServletDemo01 {
public static void main(String[] args) {
ServerSocket serverSocket=null;
Socket socket=null;
InputStream is=null;
ByteArrayOutputStream baos=null;
try {
//1.我得要有一个地址
serverSocket = new ServerSocket(9999);
while (true){
//2.等待客户端连接过来
socket = serverSocket.accept();
//3.读取客户端的消息
is = socket.getInputStream();
//管道流
baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len=is.read(buffer))!=-1){
baos.write(buffer,0,len);
}
System.out.println(baos.toString());
}
} catch (IOException e) {
e.printStackTrace();
}finally {
//关闭资源
if (baos!=null){
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is!=null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(socket!=null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(serverSocket!=null){
try {
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}