利用socket进行服务端与客户端传文件

来源：互联网发布：java 心跳实现编辑：程序博客网时间：2024/06/07 01:19

逻辑：

1.客户端将需要查找的文件名以流的形式传给服务端2.服务端接受客户端的连接，把流转化为字符串，进行一个目录的遍历，查找是否存在需要的文件，若未找到，则输出未找到，若找到，则将文件转化为流，传给客户端3.客户端准备接受，将服务端传过来的流转化为文件，存储下载。4，至此，完成一个简单的客户端与服务端传输文件的小栗子~

Client.java

package com.ysk;import java.io.BufferedReader;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;import java.net.UnknownHostException;public class Client {    public static void main(String[] args) {        try {            Socket socket = new Socket("127.0.0.1", 5555);            OutputStream os = socket.getOutputStream();// 字节输出流            PrintWriter pw = new PrintWriter(os);            pw.write("aa.txt");//输入需要搜索的文件名            pw.flush();            socket.shutdownOutput();            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));            String a = "";            String temp = "";            while ((temp = in.readLine()) != null) {                a += temp;            }            PrintWriter out = new PrintWriter(new OutputStreamWriter(new FileOutputStream("src\\asb.txt")));            out.write(a);            out.flush();            out.close();        } catch (UnknownHostException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {        }    }}

Server.java

package com.ysk;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;public class Server {    static ServerSocket serverSocket;    public static void main(String[] args) {        try {            serverSocket = new ServerSocket(5555);            System.out.println("***服务器即将启动，等待客户端的连接***");            Socket socket = serverSocket.accept();            BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));            String file = br.readLine();            findFile("src", file);            if (result) {                System.out.println("已找到" + file);                File f = new File(file);//              File copyfile = new File("src\\file", "bb.txt");                BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(filepath + file)));                System.out.println(filepath + file);                String a = "";                String temp = "";                while ((temp = in.readLine()) != null) {                    a += temp;                }                PrintWriter out = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));                out.write(a);                out.flush();                socket.shutdownOutput();            } else {                System.out.println("未找到文件");            }        } catch (IOException e) {            e.printStackTrace();        }    }

需自备aa.txt，这种资源文件，以便测试。

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