TCP网络编程
public class TCPTest { @Test public void client() { Socket socket = null; OutputStream os = null; try { //1.创建Socket对象,指明服务器端的ip和端口号 InetAddress inet = InetAddress.getByName("127.0.0.1"); socket = new Socket(inet, 8899); //2.获取一个输出流,用于输出数据 os = socket.getOutputStream(); //3.写出数据的操作 os.write("hello哈哈哈".getBytes()); } catch (IOException e) { e.printStackTrace(); } finally { //4.资源关闭 if (os != null) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } if (socket != null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Test public void server(){ ServerSocket serverSocket = null; Socket socket = null; InputStream is = null; ByteArrayOutputStream baos = null; try { //1.创建服务器端的ServerSocket,指明自己的端口号 serverSocket = new ServerSocket(8899); //调用accept()表示接收来自于客户端的socket socket = serverSocket.accept(); //3.获取输入流 is = socket.getInputStream(); //4.读取输入流中的数据 baos = new ByteArrayOutputStream(); byte[] bcuf = new byte[5]; int len; while ((len = is.read(bcuf)) != -1) { baos.write(bcuf, 0, len); } System.out.println(baos.toString()); } catch (IOException e) { e.printStackTrace(); } finally { if(baos!=null){ try { baos.close(); } catch (IOException e) { e.printStackTrace(); } } if(baos!=null){ try { is.close(); } catch (IOException e) { e.printStackTrace(); } } if(baos!=null){ try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(baos!=null){ try { serverSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
public class TCPTest2 { @Test public void client() throws IOException { InetAddress inet = InetAddress.getByName("127.0.0.1"); Socket socket = new Socket(inet,8899); OutputStream os = socket.getOutputStream(); File file = new File("hello.txt"); FileInputStream fis = new FileInputStream(file); byte[] bytes = new byte[1024]; int len; while ((len=fis.read(bytes))!=-1){ os.write(bytes,0,len); } socket.shutdownOutput(); fis.close(); os.close(); socket.close(); } @Test public void server() throws IOException { FileOutputStream fos = new FileOutputStream("hello3.txt"); ServerSocket ss = new ServerSocket(8899); Socket socket = ss.accept(); InputStream is = socket.getInputStream(); byte[] bytes = new byte[1024]; int len; while ((len=is.read(bytes))!=-1){ fos.write(bytes,0,len); } is.close(); socket.close(); fos.close(); } }