实现客户端发送文件给服务器端,服务端将文件保存在本地

package com.it.internet;

import org.junit.Test;

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
/*实现客户端发送文件给服务器端,服务端将文件保存在本地*/
public class TCPtest1 {
    @Test
    public  void client(){
        Socket socket = null;
        FileInputStream fis = null;
        OutputStream os = null;
        try {
            //创建客户端socket
            socket = new Socket(InetAddress.getByName("127.0.0.1"), 8787);
            //创建输入流
            fis = new FileInputStream(new File("风景如画.jpg"));
            //创建socket的输出流.将客户端的数据输出出去
            os = socket.getOutputStream();
            byte[] buffer  =new byte[20];
            int len;
            //读取文件/输出数据操作
            while ((len=fis.read(buffer))!=-1){
                os.write(buffer,0,len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //流关闭
            if (os!=null){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
            if (fis!=null){

                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null){

                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    @Test
    public  void  server(){
   //创建服务端serverSocket
        ServerSocket ss = null;
        Socket socket = null;
        InputStream is = null;
        FileOutputStream fos = null;
        try {
            ss = new ServerSocket(8787);
            //接收来自于客户端的socket
            socket = ss.accept();
            //主要通过拿到客户端的socket  获取一个读入流
            is = socket.getInputStream();
            //创建一个输出流, 将文件保存在本地,指定一个路径
            fos = new FileOutputStream(new File("风景如画3.jpg"));
            byte[]  buffer  =new byte[20];
            int len;
            //读取及写出的操作
            while ((len=is.read(buffer))!=-1){
                fos.write(buffer,0,len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //流关闭
            if (fos!=null){

                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (is!=null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
            if (socket!=null){

                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (ss!=null){

                try {
                    ss.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }


    }
}