jsonc库使用

1: 下载json-c库源码文件json-c-0.9.tar.gz

2: 编译

3: json-c常用函数(1): 将一个json文件转换成object对象: struct json_object* json_object_from_file(char *filename)举例： json_object *pobj = NULL;pobj = json_object_from_file("/home/boy/tmp/test/jsontest/test.json");

(2): 将json-object写回文件int json_object_to_file(char *filename, struct json_object *obj)举例:json_object_from_file("/home/boy/tmp/test/jsontest/test.json", pobj);

(3): 删除一个对象void json_object_object_del(struct json_object* jso, const char *key);

(4): 增加一个对象void json_object_object_add(struct json_object* jso, const char *key, struct json_object *val);举例:json_object_object_add(pobj, "Name", json_object_new_string("Andy"));json_object_object_add(pobj, "Age", json_object_new_int(200));

(5): 释放对象void json_object_put(struct json_object *jso);

4:　使用举例(1): 新建一个x.json文件{"item1": "I love JSON","foo": "You love Json", "item3": "We love JSON","Name": "Andy","Age": 28}(2): 程序

#include    <stdlib.h>#include    <stdio.h>#include    <unistd.h>#include    <string.h>#include    "json.h"

void  GetValByKey(json_object * jobj, const  char  *sname){    json_object     *pval = NULL;    enum json_type type;    pval = json_object_object_get(jobj, sname);    if(NULL!=pval){        type = json_object_get_type(pval);        switch(type)        {            case    json_type_string:                PRintf("Key:%s  value: %s/n", sname, json_object_get_string(pval));                break;            case    json_type_int:                printf("Key:%s  value: %d/n", sname, json_object_get_int(pval));                break;            default:                break;        }    }}

int  main(void){    json_object    *pobj = NULL;

    //pobj = json_tokener_parse("{ /"abc/": 12, /"foo/": /"bar/", /"bool0/": false, /"bool1/": true, /"arr/": [ 1, 2, 3, null, 5 ] }");

    //printf("new_obj.to_string()=%s/n", json_object_to_json_string(pobj));

    //json_parse(pobj);

    pobj = json_object_from_file("/home/boy/tmp/test/jsontest/test.json");    GetValByKey(pobj, "foo");

    json_object_object_del(pobj, "foo");    json_object_object_add(pobj, "foo", json_object_new_string("fark"));    json_object_object_add(pobj, "Age", json_object_new_int(200));    GetValByKey(pobj, "Age");    json_object_to_file("/home/boy/tmp/test/jsontest/new.json", pobj);

    json_object_put(pobj);    return 0;}

Makefile

all:server

server:    gcc -std=c99 -msse2 -Wall -O3 -o main main.c -ljson -lcrypto -lm  -lpthread

完