本文实例讲述了Java基于Tcp的基础聊天功能。分享给大家供大家参考，具体如下：
最基础的聊天，用户端和服务器端每次说一句，而且严格规定了先后到顺序。
服务器端：
import java.io.*;
import java.net.*;
public class ChatServer {
public static void main(String[] args) {
ServerSocket server = null;
try {
server = new ServerSocket(12138);
} catch (IOException e) {
System.out.println("error" + e);
}
// server = null;
try {
Socket ac = null;
// ac = new Socket();
// ac = null;
ac = server.accept();
BufferedReader is = null;
is = new BufferedReader(new InputStreamReader(ac.getInputStream()));
BufferedReader dis = new BufferedReader(new InputStreamReader(System.in));
PrintWriter os = new PrintWriter(ac.getOutputStream());
String line = null;
System.out.println("clinent " + is.readLine());
line = dis.readLine();
while(!line.equals("bey")) {
os.println(line);
os.flush();
System.out.println("server " + line);
System.out.println("client " + is.readLine());
line = dis.readLine();
}
os.close();
dis.close();
is.close();
ac.close();
} catch (Exception e) {
System.out.println("error" + e);
}
}
}
用户端：
public class ChatClient {
public static void main(String[] args) {
Socket client = null;
try {
client = new Socket("127.0.0.1",12138);
BufferedReader dis = new BufferedReader(new InputStreamReader(System.in));
BufferedReader is = new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintWriter os = new PrintWriter(client.getOutputStream());
String line = dis.readLine();
while(!line.equals("bey")) {
os.println(line);
os.flush();
System.out.println("client " + line);
System.out.println("server " + is.readLine());
line = is.readLine();
}
os.close();
dis.close();
is.close();
client.close();
} catch (Exception e) {
System.out.println("error" + e);
}
}
}
无论是用户端还是服务器端都用了BufferedReader用来写入一些了连续的字符串，用PrintWriter进行输出。
注：BufferedWriter接收到的参数需要是字符类的数据流，所以要建一个inputStreamReader,而InputStreamReader的参数是数据流即可。
上面规定了写入的顺序是客户端先写，然后是服务器端；
注意要在循环结束的时候close个个数据流和端口。
希望本文所述对大家java程序设计有所帮助。
