标签:dem class get client throw 反馈 可靠 [] 不可
udp:(对讲机,不管是否和对方链接成功,都能说话)import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
/**
*
* @author WangShuang
*
*/
public class Person1 {
public static void main(String[] args) throws SocketException {
Runnable sendDemo = new SendDemo();
Runnable receiveDemo = new ReceiveDemo();
new Thread(sendDemo).start();
new Thread(receiveDemo).start();
}
}
class SendDemo implements Runnable{
@Override
public void run() {
DatagramSocket dgs = null;
try {
InetAddress byName = InetAddress.getByName("ip地址");
//创建udpsocket服务
dgs = new DatagramSocket();
//确定方式数据,封装成数据包
while(true){
InputStream in = System.in;
InputStreamReader isr = new InputStreamReader(in);//将字节输入流转成字符输入流
BufferedReader br = new BufferedReader(isr);
String readLine = br.readLine();
byte[] data = readLine.getBytes();
DatagramPacket dgp = new DatagramPacket(data, data.length,localHost,10001);
//通过udpsocket服务的发送功能,将数据包发送
dgs.send(dgp);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
dgs.close();
}
}
}
class ReceiveDemo implements Runnable{
@Override
public void run() {
DatagramSocket dgs = null;
try {
//建立udpsocket服务,并未应用程序分配端口
dgs= new DatagramSocket(10000);
//建立空数据包,存储接收到的数据,
byte[] buf = new byte[1024];
DatagramPacket dgp = new DatagramPacket(buf, buf.length);
while(true){
//通过socket服务的接受功能,接收数据
dgs.receive(dgp);
//通过数据包的特有功能,将数据进行提取
String hostAddress = dgp.getAddress().getHostAddress();
int port = dgp.getPort();
byte[] data = dgp.getData();
String string = new String(data,0,dgp.getLength());
//处理数据
System.out.println(hostAddress+"..."+port+"..."+string);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
dgs.close();
}
}
}
Person2
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
public class Person2 {
public static void main(String[] args) throws SocketException {
DatagramSocket sendDatagramSocket = new DatagramSocket();
DatagramSocket receiveDatagramSocket = new DatagramSocket(10001);
Runnable sendDemo = new SendDemo2(sendDatagramSocket);
Runnable receiveDemo = new ReceiveDemo2(receiveDatagramSocket);
new Thread(sendDemo).start();
new Thread(receiveDemo).start();
}
}
class SendDemo2 implements Runnable{
private DatagramSocket dgs;
public SendDemo2(DatagramSocket dgs) {
this.dgs = dgs;
}
@Override
public void run() {
try {
InetAddress byName = InetAddress.getByName("ip地址");
//创建udpsocket服务
//确定方式数据,封装成数据包
while(true){
InputStream in = System.in;
InputStreamReader isr = new InputStreamReader(in);//将字节输入流转成字符输入流
BufferedReader br = new BufferedReader(isr);
String readLine = br.readLine();
byte[] data = readLine.getBytes();
DatagramPacket dgp = new DatagramPacket(data, data.length,localHost,10000);
//通过udpsocket服务的发送功能,将数据包发送
dgs.send(dgp);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
dgs.close();
}
}
}
class ReceiveDemo2 implements Runnable{
private DatagramSocket dgs;
public ReceiveDemo2(DatagramSocket dgs) {
this.dgs = dgs;
}
@Override
public void run() {
try {
//建立udpsocket服务,并未应用程序分配端口
//建立空数据包,存储接收到的数据,
byte[] buf = new byte[1024];
DatagramPacket dgp = new DatagramPacket(buf, buf.length);
while(true){
//通过socket服务的接受功能,接收数据
dgs.receive(dgp);
//通过数据包的特有功能,将数据进行提取
String hostAddress = dgp.getAddress().getHostAddress();
int port = dgp.getPort();
byte[] data = dgp.getData();
String string = new String(data,0,dgp.getLength());
//处理数据
System.out.println(hostAddress+"..."+port+"..."+string);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
dgs.close();
}
}
}
tcp(电话,只有和对方建立连接才能通话)
建立连接,形成传输数据的通道(socket流)
在链接中,可以进行一次性的大量数据的传输
链接通过3次握手完成的,在吗?在。知道了
数据相对慢
分为客户端(socket)和服务端(ServerSocket)
客户端
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
/**
*
* @author WangShuang
*
*/
public class ClientDemo {
public static void main(String[] args) throws SocketException {
Socket socket = null;
try {
InetAddress byName = InetAddress.getByName("ip地址");
//创建客户端socket服务,指定目的主机和端口
socket = new Socket(byName,9999);
//为了发送数据,应该获取socket流中的输出流,将数据写到该流中,通过网络发送给服务端
OutputStream outputStreamsocket = socket.getOutputStream();
//将socket输出流转成字符缓冲输出流
OutputStreamWriter oswsocket = new OutputStreamWriter(outputStreamsocket);//通过转换流将字节输出流转为字符输出流
BufferedWriter bwsocket = new BufferedWriter(oswsocket);//字符缓冲流
//读取键盘输入的数据,并转成字符缓冲流
BufferedReader brsocket = new BufferedReader(new InputStreamReader(System.in));
String readLine = null;
while((readLine=brsocket.readLine())!=null){
//将键盘输入的数据,写到socket流中
bwsocket.write(readLine);
bwsocket.newLine();
bwsocket.flush();
//获取socket输入流,将服务端的数据获取到,并打印
BufferedReader fbrsocket = new BufferedReader(new InputStreamReader(socket.getInputStream()));
System.out.println("服务端返回的数据"+fbrsocket.readLine());
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
//关闭客户端资源
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
服务端
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class ServiceDemo {
public static void main(String[] args) {
//创建服务端socket服务
ServerSocket serverSocket=null;
Socket socket =null;
try {
serverSocket = new ServerSocket(9999);
//获取客户端socket对象
socket = serverSocket.accept();
//获取socket输入流,并转成字符缓冲输入流,将客户端的数据读取到,并打印
InputStream stream = socket.getInputStream();
BufferedReader brsocket = new BufferedReader(new InputStreamReader(stream)) ;
String data = null;
while((data=brsocket.readLine())!=null){
System.out.println("客户端发送的数据"+data);
//反馈信息给客户端
BufferedWriter bwsockect = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())) ;
bwsockect.write(data.toUpperCase());
bwsockect.newLine();
bwsockect.flush();
}
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
问题:为什么客户端关闭以后,服务端也关闭呢
因为客户端的socket已经关闭了,服务端是获取的客户端的socket,所以服务端也技术了
标签:dem class get client throw 反馈 可靠 [] 不可
原文地址:http://blog.51cto.com/13579086/2069499