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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！
