java中tcp小样例

服务端：

ServerSocket service = new ServerSocket(7777);
Socket socket = service.accept();
InputStream input = socket.getInputStream();
OutputStream out = socket.getOutputStream();
BufferedInputStream bufinput = new BufferedInputStream(input);
BufferedOutputStream bufout = new BufferedOutputStream(out);
byte [] buf = new byte[1024];
int len = 0;StringBuffer sb = new StringBuffer();
String message = new String(buf,0,bufinput.read(buf));
System.out.println(message); out.write("服务端：\n小客你好啊！".getBytes());

client：

Socket client = new Socket("127.0.0.1",7777);
OutputStream out = client.getOutputStream();
InputStream input = client.getInputStream();
BufferedOutputStream bufout = new BufferedOutputStream(out);
BufferedInputStream bufinput = new BufferedInputStream(input);
bufout.write("客户端：\n你好".getBytes());
bufout.flush();
byte [] buf = new byte [1024];
String message = new String(buf,0,bufinput.read(buf));
System.out.println(message);