使用socket进行服务端与客户端传文件的方法

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。

总结

以上所述是小编给大家介绍的使用socket进行服务端与客户端传文件的方法，希望对大家有所帮助