Json CPP 中文支持与入门示例

在每一个Json Cpp自带*.cpp文件头加上:

#include "stdafx.h"

将Json Cpp对自带的头文件的引用修改为单引号方式，例如json_reader.cpp原始代码为:

#include <json/reader.h>
#include <json/value.h>
#include <utility>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <iostream>
#include <stdexcept>

修改后(注意我引用路径的不同):

#include "stdafx.h"
#include "reader.h"
#include "value.h"
#include <utility>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <iostream>
#include <stdexcept>

定位到json_reader.cpp第87行，将代码修改为如下：

else if (cp <= 0xFFFF) 
{
    // add by sam BEGIN
    if((cp>=0x4E00 && cp<=0x9FA5)||(cp>0x9F00 && cp<0xFA2D))
    {
        wchar_t src[2]={0};
        char dest[5]={0};
        src[0]=static_cast<wchar_t>(cp);
        std::string curLocale=setlocale(LC_ALL,NULL);
        setlocale(LC_ALL,"chs");
        wcstombs_s(NULL,dest,5,src,2);
        result = dest;
        setlocale(LC_ALL,curLocale.c_str());
    }
    else
    {
        result.resize(3);
        result[2] = static_cast<char>(0x80 | (0x3f & cp));
        result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6)));
        result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12)));
    }
    // add by sam END
}

使用JsonCpp例子:

JSON代码如下

{
    "function":"add",
    "host":"localhost",
    "port":8080,
    "method":"doUserAdd",
    "varname":"UserName"
    "varvalue":"麦兜"
}

C++代码如下

#include <string>
#include "Json.h"
...
using namespace std;
...
string strHost     = root["host"].asString();
int strPort        = root["port"].asInt();
string strMethod   = root["method"].asString();
string strFunc     = root["function"].asString();
string strVarName  = root["varname"].asString();
string strVarValue = root["varvalue"].asString();