how to convert wstring to string-白红宇

how to convert wstring to string

阅读量：3527 次

发布时间：2019-05-20

本文共 2093 字，大约阅读时间需要 6 分钟。

#define _CRT_SECURE_NO_WARNINGS#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace std;int main(){ setlocale(LC_CTYPE, "chs"); string str; wstring wstr = L"123呵呵呵abc"; char cstr[100] = {0}; sprintf(cstr, "%S", wstr.c_str()); str = cstr; cout << str << endl;}

写入文件

#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        int main(int argc, char *argv[]){   std::wstring str = L"123,我是谁？我爱钓鱼岛！";   std::wstring_convert
        
         
          > conv; std::string narrowStr = conv.to_bytes(str); { std::ofstream ofs ("c:\\test.txt"); ofs << narrowStr; } std::wstring wideStr = conv.from_bytes(narrowStr); { std::locale::global(std::locale("Chinese-simplified")); std::wofstream ofs (L"c:\\testW.txt"); ofs << wideStr; }｝

UTF8文件读取

#define _CRT_SECURE_NO_WARNINGS#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace std;int main(){ auto LocUtf8 = locale(locale(""),new codecvt_utf8
          
           ); wifstream wfin("test.txt"); wfin.imbue(LocUtf8); wstring wstr; while (getline(wfin, wstr)) { wcout.imbue(locale("")); wcout << wstr << endl; } wfin.close();}

假如我们取到的数据是这样的：

{"ret":1,"start":"58.57.64.0","end":"58.57.95.255","country":"\u4e2d\u56fd","province":"\u5c71\u4e1c","city":"\u6f4d\u574a","district":"","isp":"\u7535\u4fe1","type":"","desc":""}

那么我们改怎么样进行转化呢？

zhaoshizhong1老师的方法：

#include 
   
    #include 
    
     #include 
     
      using namespace std;#define MAXL 100char u[]="\\u4e2d\\u56fd", *p;wchar_t us[MAXL];char str[MAXL];int i;int main(){	setlocale(LC_ALL, "chs");	//_wsetlocale(LC_ALL, L"chs");	//std::locale loc = (std::locale("Chinese-simplified"));	i = 0;	p = u;	while (true)	{		if (1 != sscanf(p, "\\u%4hx", &us[i])) break;		i++;		if (i >= MAXL - 1) break;		p += 6;	}	us[i] = 0;	//wcout.imbue(loc);	sprintf(str, "%S", us);	//wcout << us << endl;	cout << str << endl;	return 0;}//u:[\u5c71\u4e1c]//us:[山东]//

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