我學(xué)習(xí)到的主要步驟

第一步：以特定端口（如4800）新建socket對象第二步：以系統(tǒng)輸入設(shè)備構(gòu)造BufferedReader對象，該對象用于接收系統(tǒng)鍵盤輸入的字符第三步：以socket對象 得到輸出流來構(gòu)造PrintWriter第四步：以socket對象得到輸入流來構(gòu)造相應(yīng)的BufferedReader對象，該對象用于接收server端發(fā)送過來的信息

我理解到的關(guān)閉socket：先開的后關(guān)閉，socket最后關(guān)閉。

以下是客戶端的代碼實(shí)現(xiàn)：

package com.fan.socket;

import java.io.*;import java.net.Socket;

public class SocketClient {public static void main(String[] args) throws IOException{

try{Socket socket=new Socket('127.0.0.1',4800);System.out.println('client start ...');//向本機(jī)的4800端口發(fā)出客戶請求BufferedReader br=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PrintWriter write=new PrintWriter(socket.getOutputStream());//由Socket對象得到輸出流，并構(gòu)造PrintWriter對象BufferedReader in=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String readline;readline=br.readLine(); //從系統(tǒng)標(biāo)準(zhǔn)輸入讀入一字符串while(!readline.equals('end')){//若從標(biāo)準(zhǔn)輸入讀入的字符串為 'end'則停止循環(huán)write.println(readline);//將從系統(tǒng)標(biāo)準(zhǔn)輸入讀入的字符串輸出到Server2write.flush();//刷新輸出流，使Server馬上收到該字符串System.out.println('Client:'+readline);//在系統(tǒng)標(biāo)準(zhǔn)輸出上打印讀入的字符串System.out.println('Server:'+in.readLine());//從Server讀入一字符串，并打印到標(biāo)準(zhǔn)輸出上readline=br.readLine(); //從系統(tǒng)標(biāo)準(zhǔn)輸入讀入一字符串} //繼續(xù)循環(huán)write.close(); //關(guān)閉Socket輸出流in.close(); //關(guān)閉Socket輸入流 socket.close(); //關(guān)閉Socket }catch(Exception e) {System.out.println('can not listen to:'+e);//出錯，打印出錯信息}}

}

服務(wù)端代碼實(shí)現(xiàn)：

package com.fan.socket;

import java.io.*;import java.net.ServerSocket;import java.net.Socket;

public class SocketService {public static void main(String[] args) throws IOException{SocketService socketService = new SocketService();socketService.oneServer();}public void oneServer(){try{ServerSocket server=null;try{server=new ServerSocket(4800);System.out.println('server start is ok...');//創(chuàng)建一個ServerSocket在端口4800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 in=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 writer=new PrintWriter(socket.getOutputStream());//由Socket對象得到輸出流，并構(gòu)造PrintWriter對象BufferedReader br=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:'+in.readLine());//在標(biāo)準(zhǔn)輸出上打印從客戶端讀入的字符串line=br.readLine();//從標(biāo)準(zhǔn)輸入讀入一字符串while(!line.equals('end')){//如果該字符串為 'end'，則停止循環(huán)writer.println(line);//向客戶端輸出該字符串writer.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:'+in.readLine());//從Client讀入一字符串，并打印到標(biāo)準(zhǔn)輸出上line=br.readLine();//從系統(tǒng)標(biāo)準(zhǔn)輸入讀入一字符串} //繼續(xù)循環(huán)writer.close(); //關(guān)閉Socket輸出流in.close(); //關(guān)閉Socket輸入流socket.close(); //關(guān)閉Socketserver.close(); //關(guān)閉ServerSocket}catch(Exception e) {//出錯，打印出錯信息System.out.println('Error.'+e);}}}