一个简单的基于socket的通讯处理Java程序
jopen
11年前
这几天看书看得java网络编程,看到一个不错的,适合新手的,部分代码借鉴书上的,可能有地方还不是很成熟,不过可以借鉴一下,分为客户端和服务端,话不多说,贴代码,很多都在注释中给出
客户端程序:
YeekuProtocol类,是一个帮助类,用来定义协议字符串/** * *<description>用来定义的协议字符</description> * @author Administrator * @date 2013-11-26 * @file CrazyitProtocol.java * @category com.inspur.net.MultiThread.chat.server * @version 1.0 * */ public interface YeekuProtocol { //定义协议字符串长度为2 int PROROCLO_LEN = 2; //下面是一些协议字符串,服务器和客户端交换的信息 //都应该在前、后添加这种特殊字符串。 String MSG_ROUND = "§γ"; String USER_ROUND = "∏∑"; String LOGIN_SUCCESS = "1"; String NAME_REP = "-1"; String PRIVATE_ROUND = "★【"; String SPLIT_SIGN = "※"; } clientThread线程类是客户端处理输入流的几个类 import java.io.BufferedReader; import java.io.IOException; /** *<description>客户端增加了让用户输入用户名的代码,并且不允许用户名重复 *除此之外,还可以根据用户的键盘输入来判断用户是否想发送私聊信息</description> * @author Administrator * @date 2013-11-26 * @file clientThread.java * @category com.inspur.net.MultiThread.chat.client * @version 1.0 * */ public class clientThread extends Thread{ //该线程负责处理输入流 BufferedReader br = null; public clientThread(BufferedReader br){ this.br = br; } public void run(){ //不断从输入流读取数据,并且打印输出 String line = null; try { while((line=br.readLine())!=null){ System.out.println(line); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ if(br!=null){ try { br.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } } client类,主要负责客户端的一些操作 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintStream; import java.net.Socket; import java.net.UnknownHostException; import javax.swing.JOptionPane; import com.inspur.net.MultiThread.chat.interfacefolder.YeekuProtocol; /** *<description>客户端增加了让用户输入用户名的代码,并且不允许用户名重复 *除此之外,还可以根据用户的键盘输入来判断用户是否想发送私聊信息</description> * @author Administrator * @date 2013-11-26 * @file client.java * @category com.inspur.net.MultiThread.chat.client * @version 1.0 * */ public class Client { private static final int SERVER_PORT = 40001; private static final String ip = "192.168.1.123"; private Socket socket; private PrintStream ps ; private BufferedReader brServer; private BufferedReader keyIn; public void init(){ keyIn = new BufferedReader(new InputStreamReader(System.in)); try { socket = new Socket(ip,SERVER_PORT); ps = new PrintStream(socket.getOutputStream()); brServer = new BufferedReader(new InputStreamReader(socket.getInputStream())); String tip = ""; //采用循环不断弹出对话框要求输入用户名 while(true){ String userName = JOptionPane.showInputDialog(tip+"输入用户名"); //将用户名前后增加协议字符串 ps.println(YeekuProtocol.USER_ROUND+userName+YeekuProtocol.USER_ROUND); //读取服务器的相应 String read = brServer.readLine(); //如果用户重复,开始下一次循环 if(read.equals(YeekuProtocol.NAME_REP)){ tip = "用户名重复,请刷新"; continue; } //如果服务器返回成功,结束循环 if(read.equals(YeekuProtocol.LOGIN_SUCCESS)){ break; } } } catch (UnknownHostException e) { // TODO Auto-generated catch block System.out.println("找不到远程服务器,确认服务已经启动"); closeRs(); System.exit(1); e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block System.out.println("网络异常,请重新登录"); e.printStackTrace(); } new Thread(new clientThread(brServer)).run(); } //定义一个从键盘读入,并向网络发送的方法 public void readAndSend(){ //不断从键盘读入 String line = null; try { while((line=keyIn.readLine())!=null){ if(line.indexOf(":")>0 && line.startsWith("//")){//如果以//开头,则默认为私聊信息,后面必须输入要私聊的对象 line = line.substring(2); ps.println(YeekuProtocol.PRIVATE_ROUND+line.split(":")[0]+YeekuProtocol.SPLIT_SIGN +line.split(":")[1]+YeekuProtocol.PRIVATE_ROUND); } else{ ps.println(YeekuProtocol.MSG_ROUND+line+YeekuProtocol.MSG_ROUND); } } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void closeRs(){//关闭释放IO资源 try { if(keyIn!=null){ keyIn.close(); } if(brServer!=null){ brServer.close(); } if(ps!=null){ ps.close(); } if(socket!=null){ socket.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void main(String[] args) {//程序入口 Client client = new Client(); client.init(); client.readAndSend(); } } 服务器端:服务器端主要有YeekuMap类和server,serverThred类 YeekuMap类是服务端用来存储用户名和输入输出流之间的映射关系,这样服务端就可以根据用户名来寻找相对应的socket,实现私密通信,利用map这一数据结构存储 import java.util.HashMap; import java.util.HashSet; import java.util.Set; /** * *<description>服务器端用来存储用户名和输入输出流之间的映射关系,这样服务器就可以根据用户名来 *寻找相应的socket,实现客户端之间的通信,服务器只要获取gia用户名对应的输出流即可,提供的这个HashMap类 *可以根据value获取key值,或者是通过value删除key值,而且不允许value的重复</description> * @author Administrator * @date 2013-11-26 * @file YeekuMap.java * @category com.inspur.net.MultiThread.chat.server * @version 1.0 * */ public class YeekuMap<K,V> extends HashMap<K,V>{ /** * */ private static final long serialVersionUID = 1L; //根据value值来删除指定项 public void remonveByValue(Object value){ for(Object key : keySet()){ if(get(key)==value){ remove(key); break; } } } //获取所有value组成的集合 public Set<V> valueSet(){ Set<V> result = new HashSet<V>(); for(K key : keySet()){ //将每个key对应的value添加到result集合中 result.add(get(key)); } return result; } //通过value查找key public K getKeyByValue(V val){ //便利所有key组成的集合 for(K key : keySet()){ //如果指定key对应的value与被搜索的value相同 //则返回该key的值 if(get(key).equals(val) &&get(key)==val){ return key; } } return null; } //重写HashMap的put方法,该方法允许value的重复 public V put(K key , V value){ for(V val : valueSet()){ //如果指定的value与试图放入集合的value相同 //则抛出一个RuntimeException if(val == get(key) && val.equals(get(key))){ throw new RuntimeException("MyMap实例中不允许重复"); } } return super.put(key, value); } } server类, import java.io.IOException; import java.io.PrintStream; import java.net.ServerSocket; import java.net.Socket; /** * *<description>服务器端程序,建立ServerSocket监听客户端,增加异常处理</description> * @author Administrator * @date 2013-11-26 * @file Server.java * @category com.inspur.net.MultiThread.chat.server * @version 1.0 * */ public class Server { //监听端口 private static final int SERVER_PORT = 40001; //使用MyMap对象来存储每个客户名字和对应的输出流之间的关系 public static YeekuMap<String ,PrintStream> clients = new YeekuMap<String,PrintStream>(); private Socket socket; public void init(){ try { ServerSocket serverSocket = new ServerSocket(SERVER_PORT); while(true){ socket = serverSocket.accept(); new Thread(new ServerThread(socket)).start(); } } catch (IOException e) { // TODO Auto-generated catch block System.out.println("服务器已经启动,是否端口"+SERVER_PORT+"被占用"); e.printStackTrace(); }finally{ if(socket!=null){ try { socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.exit(1); } } } public static void main(String[] args) { Server server = new Server(); server.init(); } } serverThraead类 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintStream; import java.net.Socket; import com.inspur.net.MultiThread.chat.interfacefolder.YeekuProtocol; /** * *<description>服务器端程序,处理客户端请求的实体类</description> * @author Administrator * @date 2013-11-26 * @file ServerThread.java * @category com.inspur.net.MultiThread.chat.server * @version 1.0 * */ public class ServerThread implements Runnable{ private Socket socket; private BufferedReader br = null; private PrintStream ps = null; public ServerThread(Socket socket){ this.socket = socket; try { br = new BufferedReader(new InputStreamReader(socket.getInputStream())); ps = new PrintStream(socket.getOutputStream()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void run() { // TODO Auto-generated method stub String line = null; try { while((line=br.readLine())!=null){ //如果读到以MyProtocol.USER ROUND开始和结束 //可以确定读到的是用户的用户名 if(line.startsWith(YeekuProtocol.USER_ROUND) && line.endsWith(YeekuProtocol.USER_ROUND)){ String userName = getRealMsg(line); if(Server.clients.containsKey(userName)){ System.out.println("重复"); ps.println(YeekuProtocol.NAME_REP); }else{ System.out.println("成功"); ps.println(YeekuProtocol.LOGIN_SUCCESS); Server.clients.put(userName, ps); } } //如果读到的行以YeekuProtocol.PRIVATE_ROUND开始结束 //可以确定是私聊信息,私聊信息都以特定的流输出 else if(line.startsWith(YeekuProtocol.PRIVATE_ROUND) && line.endsWith(YeekuProtocol.PRIVATE_ROUND)){ //得到真实信息 String userAndMsg = getRealMsg(line); String User = userAndMsg.split(YeekuProtocol.SPLIT_SIGN)[0]; String Msg = userAndMsg.split(YeekuProtocol.SPLIT_SIGN)[1]; //获取私聊用户的输出流,并发送私聊信息 Server.clients.get(User).println( Server.clients.getKeyByValue(ps)+"悄悄对你说:"+Msg); } //公聊的话向每个socket都发送 else{ //得到真实信息 String msg = getRealMsg(line); //便利clients的每个输出流 for(PrintStream clientsPs : Server.clients.valueSet()){ clientsPs.println(Server.clients.getKeyByValue(ps)+"说"+msg); } } } } catch (IOException e) { // TODO Auto-generated catch block Server.clients.remonveByValue(ps); System.out.println(Server.clients.size()); //关闭io资源 try { if(br != null){ br.close(); } if(ps != null){ ps.close(); } if(socket !=null){ socket.close(); } } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } e.printStackTrace(); } } //将读到的内容去掉前后的字符串,恢复成真实数据 public String getRealMsg(String line){ return line.substring(YeekuProtocol.PROROCLO_LEN, line.length()-YeekuProtocol.PROROCLO_LEN); } }
以上就是这个简单实现,我测试的时候时将他们导出成jar文件,然后再cmd窗口运行jar文件,此处在
MANIFEST.MF文件中应该加上一句Main-Class: 包名+类名,注意:后面必须有个空格,而且在结束之后要以换行结束,shift+enter