對於cjson的使用，我主要是用來模擬遠端伺服器端返回的乙個json型別的目錄結構，客戶端進行獲取並進行解析，把解析出來的目錄按照原本的結構顯示在本地。
cjson是乙個超輕巧，攜帶方便，單檔案，簡單的可以作為ansi-c標準的json解析器。
cjson結構體:
typedef
struct cjson ;
root=cjson_createobject();
cjson_additemtoobject(root, "root",
img=cjson_createobject());
cjson_addnumbertoobject(img,"key",800);
cjson_addnumbertoobject(img,"value",600);
cjson_addstringtoobject(img,"title","sugon");
cjson_additemtoobject(img,"child",thm=cjson_createobject());
cjson_addnumbertoobject(thm,"key",125);
cjson_addstringtoobject(thm,"value","100");
cjson_addstringtoobject(thm,"url","www.sugon.com");
cjson_additemtoobject(img,"nums",
cjson_createintarray(nums,4));
out=cjson_print(root);
cjson_delete(root);
return out;
char
create4()
cjson *root,*dir1,*dir2;
char *out;
const char *ro = "root";
root=cjson_createobject();
cjson_additemtoobject(root,ro,dir1=cjson_createarray());
cjson_addnumbertoobject(dir1,"key",800);
cjson_addnumbertoobject(dir1,"value",600);
cjson_addstringtoobject(dir1,"title","key and
value");
cjson_additemtoobject(root,ro,dir2=cjson_createarray());
cjson_addnumbertoobject(dir2,"value",125);
cjson_addstringtoobject(dir2,"key","100");
cjson_addstringtoobject(dir2,"title","value
and key");
out=cjson_print(root);
cjson_delete(root);
return out;
void
parse1(char
*out)
cjson *
root,*arrayitem,*item,*name,*path,*flag;
int i = 0,size = 0;
char *pr = null,*na = null,*pa =
null,*fl = null;
//將字串解析成json結構體
root = cjson_parse(out);
//根據結構體獲取陣列大小
size = cjson_getarraysize(root);
//printf("%d\n",size);
//遍歷陣列
for(i=0;i
//獲取第i個陣列項
arrayitem = cjson_getarrayitem(root,i);
if(arrayitem)
//printf("%s\n","start......");
//講json結構體轉換成字串
pr = cjson_print(arrayitem);
item = cjson_parse(pr);
name = cjson_getobjectitem(item,"name");
path = cjson_getobjectitem(item,"path");
flag = cjson_getobjectitem(item,"flag");
na = cjson_print(name);
pa = cjson_print(path);
fl = cjson_print(flag);
//printf("%s\n",pr);
printf("name:%s\n",na);
printf("path:%s\n",pa);
printf("flag:%s\n\n",fl);
void
parse2(char
*out)
cjson *
root,*root,*child,*arrayitem,*item,*name,*path,*flag;
int i = 0,size = 0;
char *pr = null,*na = null,*pa =
null,*fl = null;
root = cjson_parse(out);
if(root)
root = cjson_getobjectitem(root,"root");
if(root)
name = cjson_getobjectitem(root,"name");
path = cjson_getobjectitem(root,"path");
flag = cjson_getobjectitem(root,"flag");
na = cjson_print(name);
pa = cjson_print(path);
fl = cjson_print(flag);
printf("root:\n");
printf("name:%s\n",na);
printf("path:%s\n",pa);
printf("flag:%s\n\n",fl);
child = cjson_getobjectitem(root,"child");
if(child)
size = cjson_getarraysize(child);
//printf("%d\n",size);
printf("child:\n");
for(i=0;i
arrayitem = cjson_getarrayitem(child,i);
if(arrayitem)
//printf("%s\n","start......");
pr = cjson_print(arrayitem);
item = cjson_parse(pr);
name = cjson_getobjectitem(item,"name");
path = cjson_getobjectitem(item,"path");
flag = cjson_getobjectitem(item,"flag");
na = cjson_print(name);
pa = cjson_print(path);
fl = cjson_print(flag);
//printf("%s\n",pr);
printf("name:%s\n",na);
printf("path:%s\n",pa);
printf("flag:%s\n\n",fl);
intmain()
char *out1 = create1();
char *out2 = create2();
char *out3 = create3();
char *out4 = create4();
printf("%s\n\n\n",out1);
parse1(out1);
printf("%s\n\n\n",out2);
parse2(out2);
printf("%s\n\n\n",out3);
printf("%s\n\n\n",out4);
return 0;
執行結果如下圖所示：
上圖為建立json結構體和解析後的結果圖(分別為create1，parse1、create2，parse2)，後兩個(create3、create4)建立了沒有進行解析，因為很簡單，自己動手試試吧！相信自己，有些事情其實還是會很容易做到的。
注：
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