client.java

卡耐基SSD8 ex1.答案。不错哦。欢迎下载

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;


public class Client {
	public static void main(String[] args) throws Exception {

		if (args.length != 1) {
			System.err.println("Usage: Client <server>");
			return;
		}
		/*端口号，默认为5432*/
		int port = 5432;

		int MAX_SIZE = 1024;
		byte[] buffer = new byte[MAX_SIZE];
	
		Socket clientSocket = new Socket(args[0], port);

		System.out.println(args[0] + " is listening to your request:");

		BufferedReader input = new BufferedReader(new InputStreamReader(
				System.in));

		String fromUser = input.readLine();

		DataOutputStream outToServer = new DataOutputStream(clientSocket
				.getOutputStream());
		//发送到服务器
		outToServer.writeBytes(fromUser + "\n");

		//接收服务器返回的信息
		BufferedInputStream inFromServer = new BufferedInputStream(clientSocket
				.getInputStream());
		inFromServer.read(buffer);		
		String all=new String(buffer);
		all=all.trim();
		//分隔出头部信息和主体文件信息
		String[] ss=all.split("HeaderEnd");
		/*头部信息*/
		String header=ss[0];
		/*文件主体信息*/
		String intoFile=ss[1];
		
		PrintWriter screen = new PrintWriter(System.out, true);
		//输出头部信息
		screen.write(header);
		screen.flush();
		
		System.out.println();
		System.out.println("Enter the name of the file to save: ");
		String filename = input.readLine();
		//生成文件
		FileOutputStream outfile = new FileOutputStream(filename);
		outfile.write(intoFile.getBytes());
		outfile.flush();
		outfile.close();
		//关闭连接
		clientSocket.close();
	}
}