输入输出操作

可以这样理解：

BufferedReader/BufferedWriter使用三部曲：

服务器操作

import java.io.*; import java.net.ServerSocket; import java.net.Socket; public class Server { private static int port = 8002;//设置端口号 public static void main(String[] args)throws IOException { ServerSocket serverSocket = new ServerSocket(port);//第一步设置服务器端口号 System.out.println("等待连接...."); Socket socket = serverSocket.accept();//第二步等待客户端发送连接请求 System.out.println("客户端已连接成功"); //第三步创建和客户端的的输入输出对象 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream())); BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())); bufferedWriter.write("写入要传输给客户端的内容"); bufferedWriter.flush();//注意刷新后客户端才能收到 //关闭 bufferedReader.close(); bufferedWriter.close(); socket.close(); } }

客户端操作

import java.io.*; import java.net.Socket; public class Client { static Socket socket; static String serverHost = "10.200.142.214";//服务器端的ip地址 static int serverPort = 8002;//服务器端的端口号 public static void main(String[] args)throws IOException { socket = new Socket(serverHost,serverPort);//请求连接，连接的目的服务器的ip和端口号要作为参数 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream())); BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())); String r = bufferedReader.readLine();//读取一行服务器端写入的文本，注意文本要以换行符或者回车结尾 //关闭 bufferedReader.close(); bufferedWriter.close(); socket.close(); } }