JAVA-网络（0907）
一.计划
1.1 网络编程
1.2 多线程
1.3 swing（B/S，C/S）
1.4 数据库
1.5 前端
1.6 JavaEE
二.回顾
2.1 IO流
2.1.1 输入流/输出流
2.1.2 常用类
InputStrream 字节 / OutputStream
Reader 字符 / Writer
2.2 异常
三.网络编程
3.1 引子
http://localhost:9090/
127.0.0.1
3.2网络的基本概念
3.2.1指令
package io;import java.io.BufferedInputStream;import java.io.IOException;import java.io.InputStream;import java.net.ServerSocket;import java.net.Socket;import static java.lang.System.in;public class Server {public static void main(String[] args) throws Exception {//开端口ServerSocket server =new ServerSocket(10010);System.out.println("服务器启动……");while(true){Socket accept = server.accept();InputStream in =accept.getInputStream();BufferedInputStream inx =new BufferedInputStream(in);byte[] buffer=new byte[1024];while((inx.read(buffer))!=-1){String str =new String(buffer);System.out.println(str);}}}
}
服务器
package io;import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;public class MyServer {public static void main(String[] args) throws IOException {final int PORT=10010;ServerSocket server=new ServerSocket(PORT);System.out.println("服务器运行中……");while (true) {Socket socket=server.accept();//解析InputStream stream =socket.getInputStream();char data = (char) stream.read();System.out.println("[来自客户端：]"+data);}}
}
客户端
package io;import javax.swing.*;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.jar.JarOutputStream;public class Client {//客户端public static void main(String[] args) throws IOException {final String HOST ="127.0.0.1";final int PORT = 10010;Socket socket = new Socket(HOST, PORT);System.out.println("客户端连接成功……");OutputStream stream=socket.getOutputStream();String s = JOptionPane.showInputDialog("请输入……");stream.write(s.charAt(0));stream.flush();}
}
3.3 网络模型
3.4 TCP的三次握手&四次挥手