Json和string的相互转化

一、Json转string    

#include <string.h>
#include "js.h"

//{"type":1,"user":{"username":"xxx";"password":"1234"},"result":1}
int main(void)
{
    struct feedback fd;
    fd.type=1;
    fd.result=1;
    fd.u.username="XXX";
    fd.u.password="1234";
    //memcpy(fd.u,&u1,sizeof(fd.u));

    json_string(&fd);

    return 0;
}

#ifndef __JS_H__
#define __JS_H__

#include <stdio.h>
#include "/usr/local/include/json/json.h"

struct user{
    char *username;
    char *password;
};

struct feedback{
    int type;
    int result;
    struct user u;
};

//struct feedback fd;
extern void json_string(struct feedback *f);


#endif

//{"type":1,"user":{"username":"xxx";"password":"1234"},"result":1}

#include "js.h"

void json_string(struct feedback *f)
{
    struct json_object *fat,*usr,*json_usr,*json_type,*json_username,*json_password,*json_result;
    usr=json_object_new_object();
        json_username= json_object_new_string(f->u.username);
    json_password= json_object_new_string(f->u.password);
        json_object_object_add(usr,"username",json_username);
        json_object_object_add(usr,"password",json_password);

    fat=json_object_new_object();
    json_type=json_object_new_int(f->type);
    json_result=json_object_new_int(f->result);
    json_object_object_add(fat,"type",json_type);
    json_object_object_add(fat,"user",usr);
    json_object_object_add(fat,"result",json_result);

    const char * json_string = json_object_to_json_string(fat);
    printf("%s\n",json_string);
}

二、string转Json

#include <stdio.h>

int main(void)
{
    char *msg="{\"intent\":\"ms\",\"type\":1,\"user\":{\"username\":\"xxx\",\"password\":\"1234\"}}";
    string_json(msg);
    return 0;
}

#include <stdio.h>
#include </usr/local/include/json/json.h>

//{"intent":"ms","type":1,"user":{"username":"xxx";"password":"1234"}}
void string_json(char *msg)
{
    printf("%s\n",msg);

    struct json_object *fat,*json_intent,*json_type,*json_user,*json_username,*json_password;
    char *intent,*username,*password;
    int type;

    fat=json_tokener_parse(msg);
    json_intent=json_object_object_get(fat,"intent");
    json_type=json_object_object_get(fat,"type");
    json_user=json_object_object_get(fat,"user");


    json_username=json_object_object_get(json_user,"username");
    json_password=json_object_object_get(json_user,"password");

    intent=(char *)json_object_get_string(json_intent);
    type=json_object_get_int(json_type);
    username=(char *)json_object_get_string(json_username);
    password=(char *)json_object_get_string(json_password);

    printf("%s\t%d\t%s\t%s\n",intent,type,username,password);

}