Java--网络编程--网络文件上传

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   1. 　　

      package com.model.upload;
      
      import com.sun.xml.internal.ws.util.StreamUtils;
      
      import java.io.*;
      import java.net.ServerSocket;
      import java.net.Socket;
      
      /**
       * @Description:测试类
       * @Author: 张紫韩
       * @Crete 2021/7/24 14:49
       * 网络编程实现文件上传
       */
      public class UploadDemo01 {
      //    服务端
          public static void main(String[] args) throws IOException {
              ServerSocket serverSocket = new ServerSocket(8888);
              System.out.println("服务端启动完成监听8888端口号~");
              Socket socket = serverSocket.accept();
      
              BufferedInputStream bufferedInputStream = new BufferedInputStream(socket.getInputStream());
              FileOutputStream fileOutputStream = new FileOutputStream("D:\\qq\\IDEA\\IdeaProjects\\mianshi_project\\Java_project\\
      　　Java_wangluobiancheng\\src\\main\\resources\\file\\b.jpg");
              ByteArrayOutputStream bos = new ByteArrayOutputStream();//保存文件的一个流，将文件的所有数据都写到这个流里面，进行操作
              byte[] buff=new byte[1024];
              int readLine=0;
              while ((readLine=bufferedInputStream.read(buff))!=-1){
                  bos.write(buff, 0, readLine);
              }
              fileOutputStream.write(bos.toByteArray());
              System.out.println("照片接受完成~");
      
      
              BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(socket.getOutputStream());
              bufferedOutputStream.write("照片成功收到".getBytes());
              bufferedOutputStream.flush();//要加入flash将写入的内容进行刷新，否则会爆出 socket is closed错误
              socket.shutdownOutput();
      
              bufferedOutputStream.close();
              fileOutputStream.close();
              bos.close();
              bufferedInputStream.close();
              socket.close();
              serverSocket.close();
      
          }
      }

   2. package com.model.upload;
      
      import com.sun.xml.internal.ws.util.StreamUtils;
      
      import java.io.*;
      import java.net.InetAddress;
      import java.net.Socket;
      import java.net.UnknownHostException;
      
      /**
       * @Description:测试类
       * @Author: 张紫韩
       * @Crete 2021/7/24 14:49
       * 网络编程实现文件上传
       */
      public class UploadDemo02 {
      //    客户端
          public static void main(String[] args) throws IOException {
      
              Socket socket = new Socket(InetAddress.getLocalHost(), 8888);
              System.out.println("连接成功~");
      
              FileInputStream fileInputStream = new FileInputStream("D:\\qq\\IDEA\\IdeaProjects\\mianshi_project\\Java_project\\
             Java_wangluobiancheng\\src\\main\\resources\\file\\a.jpg");
              BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(socket.getOutputStream());
      
              //将文件的整个字节数组放到一个字节数组中
              ByteArrayOutputStream bytes=new ByteArrayOutputStream();//创建输出流对象
              byte[] buff=new byte[1024];
              int readLine=0;
              while ((readLine=fileInputStream.read(buff))!=-1){
                  bytes.write(buff,0, readLine);
              }
      
              bufferedOutputStream.write(bytes.toByteArray());
              bufferedOutputStream.flush();
              socket.shutdownOutput();
      
              BufferedInputStream bufferedInputStream = new BufferedInputStream(socket.getInputStream());
              byte[] buff1=new byte[1024];
              int readCount=0;
              while ((readCount=bufferedInputStream.read(buff1))!=-1){
                  System.out.println("服务端回复的消息："+new String(buff1,0,readCount));
              }
      
      //       注意流的关闭顺序，先用到的后关闭，后用到的先关闭，否则会出现错误
              bufferedInputStream.close();
              bufferedOutputStream.close();
              fileInputStream.close();
              socket.close();
      
      
      
          }
      }