关于TCP传输问题 - 黑马程序员技术交流社区

复制代码

class LoginClient
{
public static void main(String[] args) throws Exception
{
Socket s = new Socket("127.0.0.1", 10000);
BufferedReader bufr =
new BufferedReader(new InputStreamReader(System.in));
PrintWriter out =
new PrintWriter(s.getOutputStream(), true);
BufferedReader bufIn =
new BufferedReader(new InputStreamReader(s.getInputStream()));
for(int x = 0; x < 3; x++)
{
String line = bufr.readLine();
if(line == null)
break;
out.println(line);
String info = bufIn.readLine();
System.out.println("info : " + info);
if(info.contains("欢迎"))
break;
}
bufr.close();
s.close();
}
}
class UserThread implements Runnable
{
private Socket s;
UserThread(Socket s)
{
this.s = s;
}
public void run()
{
try {
BufferedReader bufr = new BufferedReader(new FileReader("user.txt"));
for(int x = 0; x < 3; x++)
{
BufferedReader bufIn = new BufferedReader(new InputStreamReader(s.getInputStream()));
String name = bufIn.readLine();
String line = null;
PrintWriter out = new PrintWriter(s.getOutputStream(),true);
boolean flag = false;
while((line = bufr.readLine()) != null)
{
if(line.equals(name))
{
flag = true;
System.out.println("name === " + name + "line == " + line);
break;
}
}
if(flag)
{
System.out.println(name + ", 已登录");
out.println(name + ",欢迎光临");
break;
}
else
{
System.out.println(name + ", 正在尝试登录");
out.println(name + ",用户不存在");
}
}
bufr.close();
s.close();
}
catch (Exception e) {
throw new RuntimeException("失败");
}
}
}
class LoginServer
{
public static void main(String[] args) throws Exception
{
ServerSocket ss = new ServerSocket(10000);
while(true)
{
Socket s = ss.accept();
new Thread(new UserThread(s)).start();
}
}
}

复制代码

/*
客户端通过键盘录入用户名
服务端对这个用户名进行校验
如果该用户存在，在服务端显示xxx，已登陆
并在客户端显示xxx，欢迎光临
如果该用户不存在，在服务端显示xxx，尝试登陆
并在客户端显示xxx，该用户不存在
最多就登陆三次
*/
import java.io.*;
import java.net.*;
class LoginClient
{
public static void main(String[] args) throws Exception
{
Socket s = new Socket("192.168.0.103",10008);
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
PrintWriter out = new PrintWriter(s.getOutputStream(),true);
BufferedReader bufIn = new BufferedReader(new InputStreamReader(s.getInputStream()));
for(int x=0;x<3;x++)
{
String line = bufr.readLine();
if(line==null)
break;
out.println(line);
String info = bufIn.readLine();
System.out.println("info:"+info);
if(info.contains("欢迎"))
break;
}
bufr.close();
s.close();
}
}
class UserThread implements Runnable
{
private Socket s;
UserThread(Socket s)
{
this.s = s;
}
public void run()
{
String ip = s.getInetAddress().getHostAddress();
System.out.println(ip+"....connected");
try
{
for(int x=0;x<3;x++)
{
BufferedReader bufIn = new BufferedReader(new InputStreamReader(s.getInputStream()));
String name = bufIn.readLine();
if(name==null)
break;
BufferedReader bufr = new BufferedReader(new FileReader("user.txt"));
PrintWriter out = new PrintWriter(s.getOutputStream(),true);
String line = null;
boolean flag = false;
while((line=bufr.readLine())!=null)
{
if(line.equals(name))
{
flag = true;
break;
}
}
if(flag)
{
System.out.println(name+",已登陆");
out.println(name+",欢迎光临");
break;
}
else
{
System.out.println(name+",尝试登陆");
out.println(name+",用户名不存在");
}
}
s.close();
}
catch(Exception e)
{
throw new RuntimeException(ip+"校验失败");
}
}
}
class LoginServer
{
public static void main(String[] args) throws Exception
{
ServerSocket ss = new ServerSocket(10008);
while(true)
{
Socket s = ss.accept();
new Thread(new UserThread(s)).start();
}
}
}

复制代码