Java网络编程之单线程Client-Server
来源：程序员人生 发布时间：2014-12-08 08:53:48 阅读次数：3361次
最近在写这个计算机网络，然后要求我们自己去写1个服务器，1开始1头雾水！不过后来1查资料想通了，哈哈~然后自己就啪啪啪敲出来了。好啦，闲言少叙，直接看代码！
Client.java
package exercise01;
import java.io.*;
import java.net.*;
public class Client {
private String hostname;
private int port;
Socket socket = null;
public Client(String hostname, int port){
//constructor of the Client class
this.hostname = hostname;
this.port = port;
}
public void connect() throws UnknownHostException, IOException{
System.out.println("Attempting connect to "+ hostname +":"+port);
socket = new Socket(hostname,port);
System.out.println("Connection established!");
}
public void readResponse() throws IOException{
String userInput;
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
System.out.println("Response from the server:");
while((userInput = reader.readLine() )!= null ){
System.out.println(userInput);
}
}
public static void main(String[] argv){
//create an object for the current class Client
Client client = new Client("localhost",8181);
try{
//trying to establish a connection to the server
client.connect();
//if connection succeed, return the input contents
client.readResponse();
}catch(UnknownHostException ukhe){
//if the host not found
System.err.println("Host unknown! Connection can not be established!");
}catch(IOException ioe){
//if the server doesn't work
System.err.println("Connection can not be established! The server may not be on! Check the error message! "+ioe.getMessage());
}
}
}
Server.java
package exercise01;
import java.net.*;
import java.io.*;
public class Server {
private ServerSocket serverSocket;
private int port;
public Server(int port){
this.port = port;
}
public void startServer() throws IOException{
System.out.println("Starting the socket server at the port: " + port);
serverSocket = new ServerSocket(port);
//Listen the clients. Block until one connects
System.out.println("Waiting for clients...");
Socket client = serverSocket.accept();
//A client has connected and send the welcome message
sendMessage(client);
}
//send the display message
private void sendMessage(Socket client) throws IOException {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
writer.write("Hello. You are connected to a Simple Socket Server.");
writer.flush();
writer.close();
}
/**
* Create a server object and start the server
*
* @param argv
*/
public static void main(String[] argv){
int port = 8181;
//start the server
try{
Server server = new Server(port);
server.startServer();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
}
自己将包名改1下就能够跑了。
生活不易，码农辛苦
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