cJSON字符串解析

源字符串

    //先构建cJSON对象CJSON *root=CJSON_CreateObject();CJSON *menu=CJSON_AddObjectToObject(root,"menu");CJSON_AddStringToObject(menu,"header","SVG Viewer");CJSON *items=CJSON_AddArrayToObject(menu,"items");CJSON *element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Open");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","OpenNew");CJSON_AddStringToObject(element,"label","Open New");CJSON_AddItemToArray(items,element);element=CJSON_CreateNull();CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","ZoomIn");CJSON_AddStringToObject(element,"label","Zoom In");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","ZoomOut");CJSON_AddStringToObject(element,"label","Zoom Out");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","OriginalView");CJSON_AddStringToObject(element,"label","Original View");CJSON_AddItemToArray(items,element);element=CJSON_CreateNull();CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Quality");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Pause");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Mute");CJSON_AddItemToArray(items,element);element=CJSON_CreateNull();CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Find");CJSON_AddStringToObject(element,"label","Find...");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","FindAgain");CJSON_AddStringToObject(element,"label","Find Again");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Copy");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","CopyAgain");CJSON_AddStringToObject(element,"label","Copy Again");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","CopySVG");CJSON_AddStringToObject(element,"label","Copy SVG");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","ViewSVG");CJSON_AddStringToObject(element,"label","View SVG");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","ViewSource");CJSON_AddStringToObject(element,"label","View Source");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","SaveAs");CJSON_AddStringToObject(element,"label","Save As");CJSON_AddItemToArray(items,element);element=CJSON_CreateNull();CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","Help");CJSON_AddItemToArray(items,element);element=CJSON_CreateObject();CJSON_AddStringToObject(element,"id","About");CJSON_AddStringToObject(element,"label","About Adobe CVG Viewer...");CJSON_AddItemToArray(items,element);char *cjson_string=CJSON_Print(root);CJSON *source=CJSON_Parse(cjson_string);printf("%s\n",CJSON_Print(source));CJSON_Delete(source);
//    FILE *fp=fopen("test.json","w+");
//    fprintf(fp,"%s",CJSON_Print(source));
//    fclose(fp);//解析//提取二级目录下的header信息CJSON *tmp=CJSON_GetObjectItemCaseSensitive(menu,"header");if(CJSON_IsString(tmp))printf("%s\n",tmp->valuestring);//提取数组项，并遍历输出，id label信息tmp=CJSON_GetObjectItemCaseSensitive(menu,"items");CJSON *child=NULL;if(tmp){printf("%s \n",tmp->string);child=tmp->child;}while(child){printf("-------\n");if(CJSON_IsNull(child))printf("NULL!\n");else{tmp=child->child;while(tmp){if(CJSON_IsString(tmp)){printf("%s :%s \n",tmp->string,tmp->valuestring);}else{printf("false fomat!");}tmp=tmp->next;}}child=child->next;}

控制台输出:

{
   "menu":   {
       "header":   "SVG Viewer",
       "items":   [{
               "id":   "Open"
           }, {
               "id":   "OpenNew",
               "label":   "Open New"
           }, null, {
               "id":   "ZoomIn",
               "label":   "Zoom In"
           }, {
               "id":   "ZoomOut",
               "label":   "Zoom Out"
           }, {
               "id":   "OriginalView",
               "label":   "Original View"
           }, null, {
               "id":   "Quality"
           }, {
               "id":   "Pause"
           }, {
               "id":   "Mute"
           }, null, {
               "id":   "Find",
               "label":   "Find..."
           }, {
               "id":   "FindAgain",
               "label":   "Find Again"
           }, {
               "id":   "Copy"
           }, {
               "id":   "CopyAgain",
               "label":   "Copy Again"
           }, {
               "id":   "CopySVG",
               "label":   "Copy SVG"
           }, {
               "id":   "ViewSVG",
               "label":   "View SVG"
           }, {
               "id":   "ViewSource",
               "label":   "View Source"
           }, {
               "id":   "SaveAs",
               "label":   "Save As"
           }, null, {
               "id":   "Help"
           }, {
               "id":   "About",
               "label":   "About Adobe CVG Viewer..."
           }]
   }
}
SVG Viewer
items
-------
id :Open
-------
id :OpenNew
label :Open New
-------
NULL!
-------
id :ZoomIn
label :Zoom In
-------
id :ZoomOut
label :Zoom Out
-------
id :OriginalView
label :Original View
-------
NULL!
-------
id :Quality
-------
id :Pause
-------
id :Mute
-------
NULL!
-------
id :Find
label :Find...
-------
id :FindAgain
label :Find Again
-------
id :Copy
-------
id :CopyAgain
label :Copy Again
-------
id :CopySVG
label :Copy SVG
-------
id :ViewSVG
label :View SVG
-------
id :ViewSource
label :View Source
-------
id :SaveAs
label :Save As
-------
NULL!
-------
id :Help
-------
id :About
label :About Adobe CVG Viewer...

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