一：服务端：
1.创建客户端：
package com.ywh.serversocket;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Set;
public class LoginThread extends Thread
{
Socket client;
boolean bl;
//通过构造传入一个客户socket
public LoginThread(Socket socket)
{
client=socket;
}
@Override
public void run()
{
// TODO Auto-generated method stub
try
{
//如果登录成功才运行发送消息的线程
LoginServer();
if(bl)
{
new SendThread(client).start();
}
} catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void LoginServer()throws Exception
{
//将连接后客户端输入传过来的用户名进行比对确认是否存在此用户
//先把传过来的用户名转换为string字符串
InputStream input=client.getInputStream();
byte[] bytes=new byte[1024];
input.read(bytes);
String str=new String(bytes);
System.out.println(str);
//通过Set的add方法的返回值来确认用户名是否存在，
//若用户名存在返回值为false，不存在则将新用户名加入用户名Set为true，
boolean b=UserInfo.nickName.add(str);
OutputStream output=client.getOutputStream();
if(b)
{
//当b=true，即新建用户成功时通知所有用户有新用户上线
//告知当前新用户创建成功
output.write("1".getBytes());
//将新用户的socket和用户名存入用户名map
UserInfo.userMap.put(client, str);
//获取用户socket
Set<Socket> users=UserInfo.userMap.keySet();
for(Socket user:users)
{
OutputStream op=user.getOutputStream();
op.write((str+"已上线").getBytes());
}
bl=true;
}else
{
//若创建新用户失败，则返回false
output.write("0".getBytes());
LoginServer();
bl=false;
}
}
}
JDBCUtil.java
2.创建一个类用于存储登录用户的信息：
package com.ywh.serversocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
public class UserInfo
{
//用来存储用户和用户名的Map
public static HashMap<Socket, String> userMap=new HashMap<Socket, String>();
//用于存储用户名比对的Set
public static Set<String> nickName=new HashSet<String>();
}
3.交互：发送线程
package com.ywh.serversocket;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.util.Set;
public class SendThread extends Thread
{
Socket client;
public SendThread(Socket socket)
{
client = socket;
}
@Override
public void run()
{
// TODO Auto-generated method stub
while(true)
{
try
{
InputStream input=client.getInputStream();
byte[] bytes=new byte[1024];
input.read(bytes);
String str=new String(bytes);
Set<Socket> users=UserInfo.userMap.keySet();
for(Socket user:users)
{
if(user!=client)
{
user.getOutputStream().write
((UserInfo.userMap.get(client)+":"+str).getBytes());
}
}
} catch (IOException e)
{
// TODO Auto-generated catch block
Set<Socket> users=UserInfo.userMap.keySet();
for(Socket user:users)
{
if(user!=client)
{
try
{
user.getOutputStream
().write((UserInfo.userMap.get(client)+"下线").getBytes());
} catch (IOException e1)
{
// TODO Auto-generated
catch block
e1.printStackTrace();
}
}
UserInfo.nickName.remove
(UserInfo.userMap.get(client));
UserInfo.userMap.remove(client);
}
}
}
}
}
4.主方法，用于运行
package com.ywh.serversocket;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class Main
{
public static void main(String[] args)
{
// TODO Auto-generated method stub
try
{
@SuppressWarnings("resource")
ServerSocket serversocket=new ServerSocket(8088);
System.out.println("服务器已启动...");
while(true)
{
Socket socket=serversocket.accept();
new LoginThread(socket).start();
}
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
服务端完成
二：客户端部分
1.客户端发送信息
package com.ywh.clientsocket;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
public class ClientReceive extends Thread
{
Socket client;
public ClientReceive(Socket socket)
{
// TODO Auto-generated constructor stub
client=socket;
}
@Override
public void run()
{
// TODO Auto-generated method stub
while(true)
{
try
{
InputStream input=client.getInputStream();
byte[] bytes=new byte[1024];
input.read(bytes);
System.out.println(new String(bytes));
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
2.客户端接受信息
package com.ywh.clientsocket;
import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;
public class ClientSend extends Thread
{
Socket client;
public ClientSend(Socket socket)
{
// TODO Auto-generated constructor stub
client=socket;
}
@Override
public void run()
{
// TODO Auto-generated method stub
@SuppressWarnings("resource")
Scanner sc=new Scanner(System.in);
while(true)
{
String str=sc.nextLine();
try
{
client.getOutputStream().write(str.getBytes());
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
ClientSend.java
3.客户端主方法
package com.ywh.clientsocket;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.util.Scanner;
public class Main
{
public static String ip = "192.168.10.32";
public static int port = 8088;
static Scanner sc = new Scanner(System.in);
public static void main(String[] args)
{
// TODO Auto-generated method stub
// System.out.println("请输入IP地址");
// String ip=sc.nextLine().trim();
// System.out.println("请输入端口号");
// int port=sc.nextInt();
try
{
Socket user = new Socket(ip, port);
System.out.println("连接服务器成功，请输入登录昵称");
String nickName = sc.nextLine();
while (nickName.equals(""))
{
System.out.println("昵称不能为空，请重新输入昵称");
nickName = sc.nextLine();
}
Login(user,nickName);
new ClientSend(user).start();
new ClientReceive(user).start();
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void Login(Socket user, String nickName)
{
try
{
user.getOutputStream().write(nickName.getBytes());
InputStream input = user.getInputStream();
byte[] bytes = new byte[1024];
input.read(bytes);
String str = new String(bytes).trim();
while (str.equals("0"))
{
System.out.println("昵称重复，请重新输入昵称");
nickName = sc.nextLine();
while (nickName.equals(""))
{
System.out.println("昵称不能为空，请重新输入昵称");
nickName = sc.nextLine();
}
user.getOutputStream().write(nickName.getBytes());
input = user.getInputStream();
bytes = new byte[1024];
input.read(bytes);
str = new String(bytes);
}
if(str.equals("1"))
{
System.out.println("登录成功");
}else
{
System.out.println("服务器错误");
}
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
时间： 2024-08-26 08:30:10