TCP 登录实现代码

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import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;/** * 登录服务器 * @author Administrator * */public class LoginServerDemo {    public static void main(String[] args) {        // TODO Auto-generated method stub        int port = 20000;        try {            ServerSocket  ss = new ServerSocket(port);            System.out.println("服务器已启动");            Socket socket = ss.accept();            System.out.println("有客户连接进来");            InputStream in = socket.getInputStream();            BufferedReader br =                     new BufferedReader(new InputStreamReader(in));            OutputStream out = socket.getOutputStream();            PrintWriter pw = new PrintWriter(out);            String str = null;            String name = "";            String pwd = "";            while( (str = br.readLine()) != null ){                String tag = str.split(":")[0];                if(tag.equals("name")){                    name = str.split(":")[1];                }else if(tag.equals("pwd")){                    pwd = str.split(":")[1];                }                if((!name.equals(""))&&(!pwd.equals(""))){                    //进行登录判断                    if(name.equals("zhangsan") && pwd.equals("123456")){                        pw.println("true");                    }else{                        pw.println("false");                    }                    pw.flush();                    break;                }            }            socket.close();//关闭连接            ss.close();//关闭服务器            System.out.println("服务器已关闭");        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.ObjectInputStream;import java.io.OutputStream;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;public class LoginObjectServerDemo {    public static void main(String[] args) {        // TODO Auto-generated method stub        int port = 20000;        try {            ServerSocket  ss = new ServerSocket(port);            System.out.println("服务器已启动");            Socket socket = ss.accept();            System.out.println("有客户连接进来");            InputStream in = socket.getInputStream();            ObjectInputStream oin = new ObjectInputStream(in);            OutputStream out = socket.getOutputStream();            PrintWriter pw = new PrintWriter(out);            String str = null;            String name = "zhangsan";            String pwd = "123456";            //接收客户端登录消息            Object obj = null;            if((obj = oin.readObject())!= null){                UserInfo ui = (UserInfo)obj;                if(name.equals(ui.getUsername())&&pwd.equals(ui.getPassword())){                    pw.println("true");                }else{                    pw.println("false");                }                pw.flush();            }            socket.close();//关闭连接            ss.close();//关闭服务器            System.out.println("服务器已关闭");        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (ClassNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

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