使用socket进行服务端与客户端传文件的方法_JAVA教程

使用socket进行服务端与客户端传文件的方法

2020-12-18 11:47ysk_xh_521 JAVA教程

这篇文章主要介绍了使用socket进行服务端与客户端传文件的方法,需要的朋友可以参考下

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();

									    }

									  }