客户端代码
import java.io.*;
import java.net.*;
public class SingleTalkClient
{
public static void main(String[] args) throws IOException
{
Socket client = null;//客户端的socket对象
PrintWriter out = null;//PrintWriter extends Writer向文本输出流打印对象的格式化表示形式
BufferedReader in = null; // BufferdReader extends Reader
//从字符输入流中读取文本,缓冲各个字符,从而提供字符、数组和行的高效读取。
try {
client = new Socket("???", 4444);//InteAddress,port (???是服务端计算机的IP)
out = new PrintWriter(client.getOutputStream(), true); //auto flush自动刷新
//getOutputStream()得到对应的输出流,返回OutputStream对象
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: 127.0.0.1.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: 127.0.0.1.");
System.exit(1);
}
//从标准输入流(键盘)中获取信息//由系统标准输入设备构造缓冲输入流
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String fromServer, fromUser;
boolean sbye = false;
boolean ubye = false;
System.out.print("Client input:");
fromUser = stdIn.readLine();//系统标准输入流读入一串字符
while( true )
{
if( ubye == false )
{
out.println(fromUser);
out.flush();//清空输出流
//System.out.println("Client: " + fromUser);
if (fromUser.equals("Bye."))
ubye = true;
}
if( sbye == false )
{
fromServer = in.readLine();//标准输入流中读入数据
System.out.println("from Server: " + fromServer);
if (fromServer.equals("Bye."))
sbye = true;
}
if( ubye == false )
{
System.out.print("Client input:");
fromUser = stdIn.readLine();
}
if( ubye == true && sbye == true )
break;
}
out.close();
in.close();
stdIn.close();
client.close();
}
}
服务端代码
import java.net.*;
import java.io.*;
public class SingleTalkServer
{
public static void main(String[] args) throws IOException
{
ServerSocket serverSocket = null;
try {
serverSocket = new ServerSocket(4444);//port,创建一个在端口4444监听客户请求的serverSocket
} catch (IOException e) {
System.err.println("Could not listen on port: 4444.");
System.exit(1);
}
Socket clientSocket = null;
try {
clientSocket = serverSocket.accept(); //程序将在此等候客户端的连接
} catch (IOException e) {
System.err.println("Accept failed.");
System.exit(1);
}
System.out.println("Accept OK!");
//打开输入/输出流
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true); //由stock对象得到文本输出流auto flush
BufferedReader in = new BufferedReader(new //由stock对象得到缓冲输入流
InputStreamReader(clientSocket.getInputStream()));
//从标准输入流(键盘)中获取信息//由系统标准输入设备构造缓冲输入流
BufferedReader sin = new BufferedReader( new InputStreamReader( System.in ) );
boolean sinbye = false;
boolean inbye = false;
String sinputLine, inputLine;
inputLine = in.readLine();
System.out.println( "from Client: " + inputLine );
System.out.print("Server input:");
sinputLine = sin.readLine();//系统标准输入流读入一串字符
while( true )
{
if( sinbye == false )
{
out.println(sinputLine);//文本输出流写入数据
out.flush();
//System.out.println("Server: " + sinputLine);
if (sinputLine.equals("Bye."))
sinbye = true;
}
if( inbye == false )
{
inputLine = in.readLine();//缓冲输入流读入数据
System.out.println( "from Client: " + inputLine );
if (inputLine.equals("Bye."))
inbye = true;
}
if( sinbye == false )
{
System.out.print("Server input:");
sinputLine = sin.readLine();//标准输入流读入数据
}
if( sinbye == true && inbye == true )
break;
}
out.close();
in.close();
sin.close();
clientSocket.close();
serverSocket.close();
}
}