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MFC Java 使用socket 中文乱码解决方法（一）

1、在使用MFC做服务端，Java做客户端时

（1）客户端向服务端发送数据

	Java发送代码：

PrintWriter printWriter = 
						new PrintWriter(
						new BufferedWriter(
						new OutputStreamWriter(
						client.getOutputStream(), "gbk")),true);
						//Windows一般默认为GBK编码，故转换为gbk编码，也可以使用gb18030等编码
						//Unicode会出现乱码！！！！！！！！！！！！！
        printWriter.print(msg);
        printWriter.flush();
        //printWriter.close();

MFC接收代码

char strRecive[512];//数组大小可以是发送数据的类型自由改变
	ZeroMemory(strRecive, sizeof(strRecive));//清空字符串数组，避免产生乱码
	int num = Receive(strRecive, sizeof(strRecive));//接收客户端发送的数据

	CString tem = (CString)strRecive;//转换为CString

（2）服务端向客户端发送数据

MFC发送代码

//将数据转换为utf-8形式
int strSize = WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, NULL, 0, NULL, FALSE);//获取待发送数据的长度
	char *str = new char[strSize + 1];//数组长度要比数据长度大1，用于存放'
//将数据转换为utf-8形式
int strSize = WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, NULL, 0, NULL, FALSE);//获取待发送数据的长度
char *str = new char[strSize + 1];//数组长度要比数据长度大1，用于存放'\0'
memset(str, 0, strSize + 1);
WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, str, strSize, NULL, FALSE);
str[strSize] = '\0';
//发送数据
if (SOCKET_ERROR == sendSocket->Send(str, strlen(str), 0))
{ 

CString str;
str.Format(L"发送失败,错误代号：%d", GetLastError());
MessageBox(str);
return;
}
else
{ 

sendSocket->Close();
}
int len = SendMsg
'
	memset(str, 0, strSize + 1);
	WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, str, strSize, NULL, FALSE);
	str[strSize] = '
//将数据转换为utf-8形式
int strSize = WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, NULL, 0, NULL, FALSE);//获取待发送数据的长度
char *str = new char[strSize + 1];//数组长度要比数据长度大1，用于存放'\0'
memset(str, 0, strSize + 1);
WideCharToMultiByte(CP_UTF8, 0, SendMsg, -1, str, strSize, NULL, FALSE);
str[strSize] = '\0';
//发送数据
if (SOCKET_ERROR == sendSocket->Send(str, strlen(str), 0))
{ 

CString str;
str.Format(L"发送失败,错误代号：%d", GetLastError());
MessageBox(str);
return;
}
else
{ 

sendSocket->Close();
}
int len = SendMsg
';
//发送数据
if (SOCKET_ERROR == sendSocket->Send(str, strlen(str), 0))
{ 
   
	CString str;
	str.Format(L"发送失败,错误代号：%d", GetLastError());
	MessageBox(str);
	return;
}
else
{ 
   
sendSocket->Close();
}
int len = SendMsg

Java接收代码

//有多种方法可用于接收数据
reader=new BufferedReader(new InputStreamReader(client.getInputStream()));
        String line;
        while ((line = reader.readLine()) != null) { 
   
            System.out.println(line);
        }

       /* BufferedInputStream in = new BufferedInputStream(client.getInputStream()); byte[] bytes = new byte[1024]; int len; String sb=null; while ((len = in.read(bytes)) != -1) { //注意指定编码格式，发送方和接收方一定要统一，建议使用UTF-8 sb=new String(bytes,"UTF-8"); } System.out.println("get message from client: " + sb); in.close();*/

/* Reader reader =new InputStreamReader(client.getInputStream()); char chars[]=new char[121231]; int len; StringBuilder sb =new StringBuilder(); while((len=reader.read(chars)) != -1) { sb.append(new String(chars,0, len)); } System.out.println("from client: "+ sb);*/

总结

解决好编码转换问题就ok了