C++，java信息，文件传输

java客户端

 1 package client;
 2
 3 import java.io.DataOutputStream;
 4 import java.io.File;
 5 import java.io.FileInputStream;
 6 import java.io.IOException;
 7 import java.net.InetSocketAddress;
 8 import java.net.Socket;
 9
10 /**
11  * 文件发送客户端主程序
12  * @author admin_Hzw
13  *
14  */
15 public class client {
16
17     /**
18      * 程序main方法
19      * @param args
20      * @throws IOException
21      */
22     public static void main(String[] args) throws IOException {
23         int length = 0;
24         double sumL = 0 ;
25         byte[] sendBytes = null;
26         Socket socket = null;
27         DataOutputStream dos = null;
28         FileInputStream fis = null;
29         boolean bool = false;
30         try {
31             File file = new File("F:\\img\\6.jpg"); //要传输的文件路径
32             long l = file.length();
33             socket = new Socket();
34             socket.connect(new InetSocketAddress("127.0.0.1", 6000));
35             dos = new DataOutputStream(socket.getOutputStream());
36             fis = new FileInputStream(file);
37             sendBytes = new byte[1024];
38             while ((length = fis.read(sendBytes, 0, sendBytes.length)) > 0) {
39                 sumL += length;
40                 System.out.println("已传输："+((sumL/l)*100)+"%");
41                 dos.write(sendBytes, 0, length);
42                 dos.flush();
43             }
44             //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
45             if(sumL==l){
46                 bool = true;
47             }
48         }catch (Exception e) {
49             System.out.println("客户端文件传输异常");
50             bool = false;
51             e.printStackTrace();
52         } finally{
53             if (dos != null)
54                 dos.close();
55             if (fis != null)
56                 fis.close();
57             if (socket != null)
58                 socket.close();
59         }
60         System.out.println(bool?"成功":"失败");
61     }
62 }  

C++客户端

 1 #include <Winsock2.h>
 2 #include <cstdio>
 3 #include<iostream>
 4 using namespace std;
 5 #pragma comment(lib,"ws2_32.lib")
 6 void main()
 7 {
 8     WSADATA wsaData;
 9     SOCKET sockClient;//客户端Socket
10     SOCKADDR_IN addrServer;//服务端地址
11     WSAStartup(MAKEWORD(2, 2), &wsaData);    //一个socket的初始化函数
12     sockClient = socket(AF_INET, SOCK_STREAM, 0);//新建客户端socket，AF_INET使用IPv4进行通讯
13     //定义要连接的服务端地址
14     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)
15     addrServer.sin_family = AF_INET;
16     addrServer.sin_port = htons(6000);//连接端口6000
17     //连接到服务端
18     connect(sockClient, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));
19     //发送数据
20     char message[1000] = "HelloSocket!";
21     char messagerecv[1000] = "";
22     send(sockClient, message, strlen(message) + 1, 0);
23     recv(sockClient, messagerecv, 1000, 0);
24     printf("%s\n", messagerecv);
25
26
27     //发送文件
28     string file_name = "F:\\img\\6.jpg";
29     FILE *fp = fopen(file_name.c_str(), "rb");
30     int num = 0;
31     while (!feof(fp))
32     {
33         num = fread(message, 1, 1000, fp);
34         send(sockClient, message, num, 0);
35     }
36
37
38     /*
39     //文件写操作
40     string file_name = "F:\\img\\7.jpg";
41     FILE *fp = fopen(file_name.c_str(), "wb");
42     int num = 0;
43     while (1)
44     {
45         num = recv(sockClient, message, 1000, 0);
46         if (num == 0)
47             break;
48         fwrite(message, 1, num, fp);
49     }
50     */
51
52
53
54     //关闭socket
55     fclose(fp);
56     closesocket(sockClient);
57     WSACleanup();
58 }

C++服务端

 1 #include <Winsock2.h>
 2 #include <cstdio>
 3 #include<iostream>
 4 using namespace std;
 5 #pragma comment(lib,"ws2_32.lib")
 6 void main()
 7 {
 8     WSADATA wsaData;
 9     SOCKET sockServer;
10     SOCKADDR_IN addrServer;
11     SOCKET sockClient;
12     SOCKADDR_IN addrClient;
13     WSAStartup(MAKEWORD(2, 2), &wsaData);
14     sockServer = socket(AF_INET, SOCK_STREAM, 0);
15     addrServer.sin_addr.S_un.S_addr = htonl(INADDR_ANY);//INADDR_ANY表示任何IP
16     addrServer.sin_family = AF_INET;
17     addrServer.sin_port = htons(6000);//绑定端口6000
18     bind(sockServer, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));
19
20     //Listen监听端
21     listen(sockServer, 5);//5为等待连接数目
22     printf("服务器已启动:\n监听中...\n");
23     int len = sizeof(SOCKADDR);
24     char message[1000];//发送至客户端的字符串
25     char recvBuf[1000];//接受客户端返回的字符串
26
27     //会阻塞进程，直到有客户端连接上来为止
28     sockClient = accept(sockServer, (SOCKADDR*)&addrClient, &len);
29     //接收并打印客户端数据
30     //recv(sockClient, recvBuf, 1000, 0);
31     sprintf(message, "%s", "gua");
32     printf("%s\n", message);
33     //send(sockClient, message, 1000, 0);
34     printf("%s\n", recvBuf);
35
36     /*
37     //发送文件
38     string file_name = "F:\\img\\6.jpg";
39     FILE *fp = fopen(file_name.c_str(), "rb");
40     int num = 0;
41     while (!feof(fp))
42     {
43         num = fread(sendBuf, 1, 1000, fp);
44         send(sockClient, sendBuf, num, 0);
45     }
46     */
47
48     //文件写操作
49     string file_name = "F:\\img\\7.jpg";
50     FILE *fp = fopen(file_name.c_str(), "wb");
51     int num = 0;
52     while (1)
53     {
54         num = recv(sockClient, message, 1000, 0);
55         if (num == 0)
56             break;
57         fwrite(message, 1, num, fp);
58     }
59
60
61     fclose(fp);
62     //关闭socket
63     closesocket(sockClient);
64     WSACleanup();
65 }