java的socket编程

1 首先在服务端需要创建服务器 

ServerSocket s1 = new ServerSocket(9006);//绑定端口
Socket socket1 = s1.accept();//等待服务器连接  此时进程会阻塞，直到有客户端连接

2服务器进行连接 

InetAddress addr=null;
addr=InetAddress.getByName("127.0.0.1");//绑定要连接的服务器ip地址

Socket socket = new Socket(addr,9006); 连接服务器

3客户端发送信息

PrintWriter out1 = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);

out1.println("hello world");//把字符串写入socket

4服务器接收信息

BufferedReader inClient1 = new BufferedReader(new InputStreamReader(socket1.getInputStream()));

String str=inClient1.readLine();//接收信息