【Java】网络编程TCP 实现聊天-蒲公英云

【Java】网络编程TCP 实现聊天

网络编程TCP实现聊天的前提还需要掌握IO流，话不多说，直接上代码！！！

客户端：

package com.kuang.lesson02;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
//客户端
public class TcpClientDemo01 { 
    public static void main(String[] args) { 
        Socket socket = null;
        OutputStream os = null;
        try { 
            //1、要知道服务器的地址、端口号
            InetAddress serverIP = InetAddress.getByName("127.0.0.1");
            int port = 9999;
            //2、创建一个socket连接
            socket = new Socket(serverIP, port);
            //3、发送消息IO流
            os = socket.getOutputStream();
            os.write("你好，Java".getBytes());
        } catch (Exception e) { 
            e.printStackTrace();
        } finally { 
            if (os != null) { 
                try { 
                    os.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
            if (socket != null) { 
                try { 
                    socket.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
        }
    }
}

服务端：

package com.kuang.lesson02;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
//服务端
public class TcpServerDemo01 { 
    public static void main(String[] args) { 
        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream is = null;
        ByteArrayOutputStream baos = null;
        try { 
            //1、我得有一个地址
            serverSocket = new ServerSocket(9999);
            while (true) { 
                //2、等待客户端连接过来
                socket = serverSocket.accept();
                //3、读取客户端的消息
                is = socket.getInputStream();
                //管道流
                baos = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int len;
                while ((len = is.read(buffer)) != -1) { 
                    baos.write(buffer, 0, len);
                }
                System.out.println(baos.toString());
            }
        } catch (Exception e) { 
            e.printStackTrace();
        } finally { 
            //关闭资源
            if (baos != null) { 
                try { 
                    baos.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
            if (is != null) { 
                try { 
                    is.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
            if (socket != null) { 
                try { 
                    socket.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
            if (serverSocket != null) { 
                try { 
                    serverSocket.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
        }
    }
}