Socket编程服务端可能出现阻塞的位置，以及解决方法

最新推荐文章于 2021-06-25 20:11:47 发布

原创最新推荐文章于 2021-06-25 20:11:47 发布 · 917 阅读

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本文介绍了一种客户端向服务端发送文件的实现方式，并演示了如何在服务端通过多线程处理客户端的文件上传请求。

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下图描述了服务端在处理客户端请求时可能出现的地方。解决方法是使接收客户端请求和处理请求分离，接收到请求后，新创建线程来处理请求。

这里写图片描述

package cn.iktz.socket.uploadpic;

import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Client {
    public static void main(String[] args) throws Exception {
        String path = "replace you file path ";
        Socket socket = new Socket("192.168.1.108", 8888);
        FileInputStream fis = new FileInputStream(new File(path));
        OutputStream out = socket.getOutputStream();
        byte[] buf = new byte[1024];
        int len = 0;
        while ((len = fis.read(buf)) != -1) {
            out.write(buf, 0, len);
        }
        fis.close();
        socket.close();
    }
}

package cn.iktz.socket.uploadpic;

import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) throws Exception {
        ServerSocket ss = null;
        try {
            ss = new ServerSocket(8888);
            while (true) {
                Socket socket = ss.accept();
                new Thread(new UploadHandler(socket)).start();
            }
        } finally {
            ss.close();
        }
    }
}

package cn.iktz.socket.uploadpic;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;

public class UploadHandler implements Runnable {

    private Socket socket;

    UploadHandler(Socket socket) {
        this.socket = socket;
    }

    public void run() {
        InputStream in = null;
        FileOutputStream fos = null;
        try {
            in = socket.getInputStream();
            fos = new FileOutputStream(new File("filePath"));
            byte[] buf = new byte[1024];
            int len = 0;
            while ((len = in.read(buf)) != -1) {
                fos.write(buf, 0, len);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (fos != null) {
                    fos.close();
                }
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}