public class TalkServer{

public static void main(String args[]) {

try{

ServerSocket server=null;

try{

server=new ServerSocket(4700);

//創(chuàng)建一個ServerSocket在端口4700監(jiān)聽客戶請求

}catch(Exception e) {

System.out.println("can not listen to:"+e);

//出錯，打印出錯信息

}

Socket socket=null;

try{

socket=server.accept();

//使用accept()阻塞等待客戶請求，有客戶

//請求到來則產(chǎn)生一個Socket對象，并繼續(xù)執(zhí)行

}catch(Exception e) {

System.out.println("Error."+e);

//出錯，打印出錯信息

}

String line;

BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));

　//由Socket對象得到輸入流，并構(gòu)造相應(yīng)的BufferedReader對象

PrintWriter os=newPrintWriter(socket.getOutputStream());

　//由Socket對象得到輸出流，并構(gòu)造PrintWriter對象

BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));

　//由系統(tǒng)標(biāo)準(zhǔn)輸入設(shè)備構(gòu)造BufferedReader對象

System.out.println("Client:"+is.readLine());

//在標(biāo)準(zhǔn)輸出上打印從客戶端讀入的字符串

line=sin.readLine();

//從標(biāo)準(zhǔn)輸入讀入一字符串

while(!line.equals("bye")){

//如果該字符串為 "bye"，則停止循環(huán)

os.println(line);

//向客戶端輸出該字符串

os.flush();

//刷新輸出流，使Client馬上收到該字符串

System.out.println("Server:"+line);

//在系統(tǒng)標(biāo)準(zhǔn)輸出上打印讀入的字符串

System.out.println("Client:"+is.readLine());

//從Client讀入一字符串，并打印到標(biāo)準(zhǔn)輸出上

line=sin.readLine();

//從系統(tǒng)標(biāo)準(zhǔn)輸入讀入一字符串

} //繼續(xù)循環(huán)

os.close(); //關(guān)閉Socket輸出流

is.close(); //關(guān)閉Socket輸入流

socket.close(); //關(guān)閉Socket

server.close(); //關(guān)閉ServerSocket

}catch(Exception e){

System.out.println("Error:"+e);

//出錯，打印出錯信息

}

}

}