一般在ubuntu中都会预装iconv的库，使用也很简单，网上的教程很多..

下面的函数，在需要转码的地方调用即可

#include <iconv.h>

#ifdef ICONV_EN

/*

   用户中文乱码问题，格式转换用！

ARG:

dest:目的格式

src:原格式

input:输入字符串

...*/

int conv_charset(const char *dest, const char *src, char *input, size_t ilen, char *output, size_t olen) {

        char **inbuf = &input;

        char **outbuf = &output;

        if(dest == NULL || src == NULL)

                return -1;

        iconv_t conv = iconv_open(dest, src);

        if ( conv == (iconv_t) -1 )

                return -1;

        memset(output, 0, olen);

        printf("dest=%s,src=%s,input=%s,output=%s,olen=%d\n",dest,src,*inbuf,*outbuf,olen);

        if ( iconv(conv, inbuf, &ilen, outbuf, &olen) )

                return -1;

        printf("output=%s\n",output); //此处打印output为空，正常

        iconv_close(conv);

        return 0;

}

#endif

函数的使用，一般windows支持GBK和GB2312格式，现在的windows强制支持GB18030,转为这个格式很好的！

函数都是亲测可用的，给大家分享，一块进步...

int send_msg_xml(struct soap *soap,char *msg)

{

        struct Namespace *nsmap;

        nsmap = NULL;

        soap->encodingStyle = NULL;

        soap_set_omode(soap,SOAP_XML_TREE);

        soap->http_content = "text/xml";

        soap_set_namespaces(soap,nsmap);

        soap_begin_send(soap);

#ifdef ICONV_EN

        char *buff/*[OUTPUT_LEN]={0}*/;

        //转码

        buff = (char *)malloc(OUTPUT_LEN);

        if(conv_charset("GBK","UTF-8",msg,(int)strlen(msg),buff,(int)OUTPUT_LEN) != 0)

        {

#endif

                soap_serialize_string(soap, &msg);

                soap_put_string(soap, &msg, "RET_MSG", NULL);

#ifdef ICONV_EN

        }else{

                soap_serialize_string(soap, &buff);

                soap_put_string(soap, &buff, "RET_MSG", NULL);

        }

#endif

        soap_end_send(soap); // Clean up temporary data used by the serializer

        return SOAP_OK;

}