客户端:
package TcpDemo1;
import jdk.net.Sockets;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.nio.charset.StandardCharsets;
public class TcpClient {
public static void main(String[] args) {
Socket socket = null;
OutputStream os = null;
try {
//连接到服务器的地址
InetAddress serverIP = InetAddress.getByName("127.0.0.1");
int port = 8899;
//创建一个socket
socket = new Socket(serverIP,port);
//创建一个输出流,往外写东西
os = socket.getOutputStream();
os.write("你好".getBytes(StandardCharsets.UTF_8));
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
//关闭资源
try{
if(os!=null){
os.close();
}
if(socket!=null){
socket.close();
}
}catch(IOException e) {
e.printStackTrace();
}
}
}
}
服务器:
package TcpDemo1;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.file.FileAlreadyExistsException;
public class TcpServer {
public static void main(String[] args) {
ServerSocket serverSocket = null;
Socket accept = null;
InputStream is = null;
ByteArrayOutputStream baos = null;
try {
//开放服务器端口
serverSocket = new ServerSocket(8899);
//等待客户端连接
accept = serverSocket.accept();
//读入客户端的信息
is = accept.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());
System.out.println(accept.getInetAddress().getHostName());
} catch (IOException e) {
e.printStackTrace();
}finally {
try{
if(baos!=null){
baos.close();
}
if(is!=null){
is.close();
}
if(accept!=null){
accept.close();
}
if(serverSocket!=null){
serverSocket.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
}
}
客户端:
package TcpDemp2;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
public class TcpClient {
public static void main(String[] args) {
try {
//创建socket连接
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),8899);
//创建一个输出流
OutputStream os = socket.getOutputStream();
//读取文件
FileInputStream fis = new FileInputStream(new File("fan.jpg"));
//写出文件
byte[] buffer = new byte[1024];
int len;
while((len = fis.read(buffer))!=-1){
os.write(buffer,0,len);
}
//告诉服务器已经传输完成,关闭数据的输出,不然就会一直阻塞
socket.shutdownOutput();
//等待服务器的响应并输出的控制台
InputStream inputStream = socket.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer2 = new byte[1024];
int len2;
while((len2 = inputStream.read(buffer2))!=-1){
baos.write(buffer2,0,len2);
}
System.out.println(baos.toString());
//关闭资源
fis.close();
os.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
服务器:
package TcpDemp2;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
public class TcpServer {
public static void main(String[] args) throws IOException {
//开启ServerSocket
ServerSocket serverSocket = new ServerSocket(8899);
//监听客户端
Socket accept = serverSocket.accept();
//获取输入流
InputStream is = accept.getInputStream();
//读取文件并保存
FileOutputStream fos = new FileOutputStream(new File("receive.jpg"));
byte[] buffer = new byte[1024];
int len;
while((len = is.read(buffer))!=-1){
fos.write(buffer,0,len);
}
//通知客户端接收成功
OutputStream outputStream = accept.getOutputStream();
outputStream.write("文件已经传输完成".getBytes(StandardCharsets.UTF_8));
//关闭资源
fos.close();
is.close();
accept.close();
serverSocket.close();
}
}
发送方:
package UdpDemo1;
import javafx.scene.chart.PieChart;
import java.io.IOException;
import java.net.*;
import java.nio.channels.DatagramChannel;
import java.nio.charset.StandardCharsets;
public class UdpClient {
public static void main(String[] args) throws IOException {
//建立DatagramSocket
DatagramSocket socket = new DatagramSocket();
//封装数据包
String msg = "UDPSender=>";
byte[] data = msg.getBytes();
InetAddress inet = InetAddress.getByName("127.0.0.1");
int port = 9090;
DatagramPacket packet = new DatagramPacket(data,0,data.length,inet,port);
//通过socket发送packet
socket.send(packet);
//关闭
socket.close();
}
}
接收方:
package UdpDemo1;
import javafx.scene.chart.PieChart;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UdpServer {
public static void main(String[] args) throws IOException {
//建立DatagramSocket 开放端口
DatagramSocket socket = new DatagramSocket(9090);
//接受数据
byte[] buffer = new byte[1024];
DatagramPacket packet = new DatagramPacket(buffer,0,buffer.length);
socket.receive(packet);
//输出数据
System.out.println(new String(packet.getData(),0,packet.getLength()));
//关闭
socket.close();
}
}
发送端:
package UdpDemo2;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
import java.nio.charset.StandardCharsets;
public class UdpSender {
public static void main(String[] args) throws IOException {
//使用DatagramSocket指定端口创建发送端
DatagramSocket socket = new DatagramSocket(8888);
//准备数据,转成字节数组
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while(true){
String data = reader.readLine();
byte[] datas = data.getBytes(StandardCharsets.UTF_8);
//封装成为数据包
DatagramPacket packet = new DatagramPacket(datas,0,datas.length,new InetSocketAddress("localhost",6666));
//发送包裹
socket.send(packet);
//退出判断
if(data.equals("bye")){
break;
}
}
socket.close();
}
}
接收方:
package UdpDemo2;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UdpReceiver {
public static void main(String[] args) throws Exception {
DatagramSocket socket = new DatagramSocket(6666);
while(true){
try{
byte[] container = new byte[1024];
DatagramPacket packet = new DatagramPacket(container,0,container.length);
socket.receive(packet);//阻塞式接收包裹
byte[] datas = packet.getData();
int len = packet.getLength();
String data = new String(datas,0,len);
System.out.println(data);
//退出判断
if(data.equals("bye")){
break;
}
}catch (Exception e){
e.printStackTrace();
}
}
socket.close();
}
}