C++，java信息，文件传输

java客户端

package client;

import java.io.DataOutputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.IOException;  
import java.net.InetSocketAddress;  
import java.net.Socket;  
  
/** 
 * 文件发送客户端主程序 
 * @author admin_Hzw 
 * 
 */  
public class client {  
      
    /** 
     * 程序main方法 
     * @param args 
     * @throws IOException 
     */  
    public static void main(String[] args) throws IOException {  
        int length = 0;  
        double sumL = 0 ;  
        byte[] sendBytes = null;  
        Socket socket = null;  
        DataOutputStream dos = null;  
        FileInputStream fis = null;  
        boolean bool = false;  
        try {  
            File file = new File("F:\\img\\6.jpg"); //要传输的文件路径  
            long l = file.length();   
            socket = new Socket();    
            socket.connect(new InetSocketAddress("127.0.0.1", 6000));  
            dos = new DataOutputStream(socket.getOutputStream());  
            fis = new FileInputStream(file);        
            sendBytes = new byte[1024];    
            while ((length = fis.read(sendBytes, 0, sendBytes.length)) > 0) {  
                sumL += length;    
                System.out.println("已传输："+((sumL/l)*100)+"%");  
                dos.write(sendBytes, 0, length);  
                dos.flush();  
            }   
            //虽然数据类型不同，但JAVA会自动转换成相同数据类型后在做比较  
            if(sumL==l){  
                bool = true;  
            }  
        }catch (Exception e) {  
            System.out.println("客户端文件传输异常");  
            bool = false;  
            e.printStackTrace();    
        } finally{    
            if (dos != null)  
                dos.close();  
            if (fis != null)  
                fis.close();     
            if (socket != null)  
                socket.close();      
        }  
        System.out.println(bool?"成功":"失败");  
    }  
}  

C++客户端

#include <Winsock2.h>
#include <cstdio>
#include<iostream>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
void main()
{
    WSADATA wsaData;
    SOCKET sockClient;//客户端Socket
    SOCKADDR_IN addrServer;//服务端地址
    WSAStartup(MAKEWORD(2, 2), &wsaData);    //一个socket的初始化函数
    sockClient = socket(AF_INET, SOCK_STREAM, 0);//新建客户端socket，AF_INET使用IPv4进行通讯
    //定义要连接的服务端地址
    addrServer.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//目标IP(127.0.0.1是回送地址)
    addrServer.sin_family = AF_INET;
    addrServer.sin_port = htons(6000);//连接端口6000
    //连接到服务端
    connect(sockClient, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));
    //发送数据
    char message[1000] = "HelloSocket!";
    char messagerecv[1000] = "";
    send(sockClient, message, strlen(message) + 1, 0);
    recv(sockClient, messagerecv, 1000, 0);
    printf("%s\n", messagerecv);
    
    
    //发送文件
    string file_name = "F:\\img\\6.jpg";
    FILE *fp = fopen(file_name.c_str(), "rb");
    int num = 0;
    while (!feof(fp))
    {
        num = fread(message, 1, 1000, fp);
        send(sockClient, message, num, 0);
    }
    

    /*
    //文件写操作
    string file_name = "F:\\img\\7.jpg";
    FILE *fp = fopen(file_name.c_str(), "wb");
    int num = 0;
    while (1)
    {
        num = recv(sockClient, message, 1000, 0);
        if (num == 0)
            break;
        fwrite(message, 1, num, fp);
    }
    */



    //关闭socket
    fclose(fp);
    closesocket(sockClient);
    WSACleanup();
}

C++服务端

#include <Winsock2.h>
#include <cstdio>
#include<iostream>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
void main()
{
    WSADATA wsaData;
    SOCKET sockServer;
    SOCKADDR_IN addrServer;
    SOCKET sockClient;
    SOCKADDR_IN addrClient;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    sockServer = socket(AF_INET, SOCK_STREAM, 0);
    addrServer.sin_addr.S_un.S_addr = htonl(INADDR_ANY);//INADDR_ANY表示任何IP
    addrServer.sin_family = AF_INET;
    addrServer.sin_port = htons(6000);//绑定端口6000
    bind(sockServer, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));

    //Listen监听端
    listen(sockServer, 5);//5为等待连接数目
    printf("服务器已启动:\n监听中...\n");
    int len = sizeof(SOCKADDR);
    char message[1000];//发送至客户端的字符串
    char recvBuf[1000];//接受客户端返回的字符串

    //会阻塞进程，直到有客户端连接上来为止
    sockClient = accept(sockServer, (SOCKADDR*)&addrClient, &len);
    //接收并打印客户端数据
    //recv(sockClient, recvBuf, 1000, 0);
    sprintf(message, "%s", "gua");
    printf("%s\n", message);
    //send(sockClient, message, 1000, 0);
    printf("%s\n", recvBuf);

    /*
    //发送文件
    string file_name = "F:\\img\\6.jpg";
    FILE *fp = fopen(file_name.c_str(), "rb");
    int num = 0;
    while (!feof(fp))
    {
        num = fread(sendBuf, 1, 1000, fp);
        send(sockClient, sendBuf, num, 0);
    }
    */

    //文件写操作
    string file_name = "F:\\img\\7.jpg";
    FILE *fp = fopen(file_name.c_str(), "wb");
    int num = 0;
    while (1)
    {
        num = recv(sockClient, message, 1000, 0);
        if (num == 0)
            break;
        fwrite(message, 1, num, fp);
    }


    fclose(fp);
    //关闭socket
    closesocket(sockClient);
    WSACleanup();
}