socketIo不仅可以用来做聊天工具,也可以实现局域网(当然你如果有外网也可用外网)内实现文件的上传和下载,下面是代码的效果演示:

GIT地址: https://github.com/fengcharly/sockeio-springMvcUpload.git

部分代码如下:

服务端的代码:

ChuanServer:

import java.io.*;import java.net.ServerSocket;import java.net.Socket;import java.nio.channels.FileChannel;public class ChuanServer { public static void protServer(String po) throws IOException { int port = Integer.parseInt(po); ServerSocket serverSocket = new ServerSocket(port); while (true) { final Socket clientSocket = serverSocket.accept(); new Thread() { @Override public void run() { try { BufferedReader br = new BufferedReader( new InputStreamReader(clientSocket.getInputStream(), "GBK") ); InputStream is = clientSocket.getInputStream(); PrintStream pr = new PrintStream( clientSocket.getOutputStream() ); pr.println("我是服务端"); String str = br.readLine(); System.out.println("br.readLine():" + str); System.out.println("服务端来接收了!!"); out(is, str); } catch (Exception e) { e.printStackTrace(); } } }.start(); } } public static void out(InputStream is, String str) throws IOException { FileOutputStream fo = new FileOutputStream("C:\\Users\\Administrator\\Desktop\\upload\\" + str); BufferedInputStream bi = new BufferedInputStream(is); BufferedOutputStream bo = new BufferedOutputStream(fo); int len = 0; while ((len=bi.read())!=-1){ bo.write(len); } bi.close(); bo.close(); }}

这里我固定了上传后保存的路径为:"C:\Users\Administrator\Desktop\upload\"

PortController:

import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import socket.ChuanServer;import java.io.IOException;@Controllerpublic class PortController { @RequestMapping("/port") public String port(String port,Model model){ model.addAttribute("port",port); try { ChuanServer.protServer(port); } catch (IOException e) { e.printStackTrace(); } return "success"; }}

再来看下上传的客户端的代码:

UpLoadController:

@Controller@RequestMapping("/")public class UpLoadController { @Autowired private UpService upService; private String zhuan=""; @RequestMapping("/upload") public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, @RequestParam("iphost") String iphost,@RequestParam("port") String port,Model model) throws IOException { String fileName = file.getOriginalFilename(); InputStream is = file.getInputStream(); upService.upload(fileName,is,iphost,port); return "success"; }}

UpServiceImpl:

@Servicepublic class UpServiceImpl implements UpService { @Override public void upload(String fileName, InputStream is, String iphost, String port) { getClientSocket(is, fileName, iphost, port); }//建立socket通信 public void getClientSocket(InputStream is, String fileName, String iphost, String port) { int po = Integer.parseInt(port); try { Socket socket = new Socket(iphost, po); BufferedReader br = new BufferedReader( new InputStreamReader(socket.getInputStream(), "UTF-8") ); PrintStream pr = new PrintStream( socket.getOutputStream() ); OutputStream os = socket.getOutputStream(); System.out.println("客户端给你传文件了!"); System.out.println("文件名为:" + fileName); //读取服务器返回的消息 String str = br.readLine(); System.out.println("服务器发来的消息为:" + str); pr.println(fileName); in(is, os); pr.close(); br.close(); System.out.println("客户端已关闭"); } catch (Exception e) { e.printStackTrace(); } } //上传文本 public static void in(InputStream is, OutputStream os) throws IOException { //BIO BufferedInputStream bi = new BufferedInputStream(is); BufferedOutputStream bo = new BufferedOutputStream(os); int len = 0; while ((len=bi.read())!=-1){ bo.write(len); System.out.println(len); } bi.close(); bo.close(); }}

这里相应的访问路径为:

服务端: http://localhost:8080/

客户端: http://localhost:8082/upload

完整项目GIT地址:

注意: https://github.com/fengcharly/sockeio-springMvcUpload.git

传输过程中的我们用的是系统提供的BufferedInputStream和BufferedOutputStream缓冲流来传输文件,相对而言传输小文件比较合适,大文件比较慢,可以进一步优化,传输过程中传输速度如下:

总结

以上所述是小编给大家介绍的SocketIo+SpringMvc实现文件的上传下载功能，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！