套接字Socket网络编程与io流

利用Socket变成，实现服务器与客户端之间得消息发送

1.在项目跟目录下存放一个request_0101.txt(用来存放客户端传给服务器的信息)和一个response_0101.txt（用来存放服务器传给的客户端信息）两个文本文档
2.编写客户端程序

public class Client{
	public static void main(String[] args){
		//创建一个StringBuffer类型的字符串
		StringBuffer sb = new StringBuffer();
		//从键盘输入一个字符串
		Scanner sc = new Scanner(System.in);
		String str = sc.next();
		sb.append(str);
		String path = "request_"+str+".txt";
		//创建一个File类型对象，获取到path路径下的文件
		File file new File(path);
		//将file文件的内容读取
		Scanner fileIn = new Scanner(file);
		//判断fileIn是否为空
		while（fileIn.hasNext()）{
			sb.append(fileIn.next());	
		}
		//建立 一个socket连接,并绑定ip和端口号
		Socket soc= new Socket("127.0.01",6666);
		BufferedReader br = new BufferedReader(new InputStreamReader(soc.getInputStream()));
		PrintWriter pw = new PriterWriter(soc.getInputStream());
		pw.println(sb);
		pw,flush();
		String info = br.readLine();
		system.out.println("服务器端传来的数据为："+info);
	}
}

3.编写服务端程序

public class server{
	public static void main(String[] args){
		//创建一个空的socket连接
		Socket soc = null;
		StringBuffer sb = new StringBuffer();
		ServerSocket ss = new ServerSocket(6666);
		while(true){
			system.out.println("服务器已经启动！")；
			//将绑定的端口号绑定到socket连接上
			soc = ss.accept();
			BufferedReader br = new BufferedReader(new inputStreamReader(soc.getInputStream()));
			PrintWriter pw = new PrintWriter(soc.getInputStream());
			String str = br.readLine();
			String code = str.substring(0,4);
			system.out.println("接收到客户端消息为："+str.substring(4));
			String path = "response_"+code+".txt";
			File file = new File(path);
			Scanner fileout = new  Scanner(file);
			while(fileout.hasNext()){
				sb.append(fileout.next());
			}
			pw.println(sb);
			pw.flush();
		}
	}
}

4.文档截图


5.运行截图