java网络编程（一）Socket、ServerSocket-蒲公英云

java网络编程（一）Socket、ServerSocket

1.Socket

java都是基于InputStream还有OutputStream实现的。Socket也可以通过输入、输出流进行读写。

客户端

OutputStream outputStream = null;
        try {
            Socket socket = new Socket("127.0.0.1", 8111);
            outputStream = socket.getOutputStream();
            outputStream.write("大鸡腿".getBytes());
            outputStream.flush();
            socket.shutdownOutput();
            InputStream inputStream = socket.getInputStream();
            InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
            BufferedReader br=new BufferedReader(inputStreamReader);
            String str=null;
            while((str=br.readLine())!=null){
                System.out.println("服务端接收到信息:"+str);
            }
            br.close();
            inputStream.close();
            outputStream.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

Socket socket=new Socket进行连接

当输出完成之后，如果还要监听，不能说outputStream.close();不然连接也会关闭的，应该使用socket.shutdownOutput();

记得最后进行所有资源的close

2.ServerSocket

通过ServerSocket开启tcp访问。accept()进行端口监听，获取socket，从而操作outpuStream、InputStream进行输入输出，最后记得close

ServerSocket serverSocket=new ServerSocket(8111);
            System.out.println("服务器已开启8111端口监听...");
            Socket socket=serverSocket.accept();
            inputStream = socket.getInputStream();
            InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
            BufferedReader br=new BufferedReader(inputStreamReader);
            while((str=br.readLine())!=null){
                System.out.println("服务端接收到信息:"+str);
            }
            OutputStream outputStream=socket.getOutputStream();
            outputStream.write("收到信息".getBytes());
            outputStream.flush();
            outputStream.close();
            br.close();
            inputStream.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }