1 #include <stdio.h>                                                                                            
  2 #include "cJSON.h"
  3 
  4 char *@H_403_30@ makeJson()
  5 @H_403_30@{
  6     cJSON * pJsonRoot =@H_403_30@ NULL;
  7 
  8     pJsonRoot =@H_403_30@ cJSON_CreateObject();
  9     if(NULL ==@H_403_30@ pJsonRoot)
 10 @H_403_30@    {
 11         //error happend here
 12         return@H_403_30@ NULL;
 13 @H_403_30@    }
 14     cJSON_AddStringToObject(pJsonRoot,hello",0); line-height:1.5!important">hello world"@H_403_30@);
 15     cJSON_AddNumberToObject(pJsonRoot,0); line-height:1.5!important">number10010@H_403_30@);
 16     cJSON_AddBoolToObject(pJsonRoot,0); line-height:1.5!important">bool1@H_403_30@);
 17     cJSON * pSubJson =@H_403_30@ NULL;
 18     pSubJson =@H_403_30@ cJSON_CreateObject();
 19     if(NULL ==@H_403_30@ pSubJson)
 20 @H_403_30@    {
 21          create object faild,exit
 22 @H_403_30@        cJSON_Delete(pJsonRoot);
 23          24 @H_403_30@    }
 25     cJSON_AddStringToObject(pSubJson,0); line-height:1.5!important">subjsonobja sub json string 26     cJSON_AddItemToObject(pJsonRoot,0); line-height:1.5!important">subobj"@H_403_30@,pSubJson);
 27 
 28     char * p =@H_403_30@ cJSON_Print(pJsonRoot);
 29    else use : 
 30      char * p = cJSON_PrintUnformatted(pJsonRoot);
 31     if(NULL ==@H_403_30@ p)
 32 @H_403_30@    {
 33         convert json list to string faild,exit
 34         because sub json pSubJson han been add to pJsonRoot,so just delete pJsonRoot,if you also delete pSubJson,it will coredump,and error is : double free
 35 @H_403_30@        cJSON_Delete(pJsonRoot);
 36          37 @H_403_30@    }
 38     free(p);
 39     
 40 @H_403_30@    cJSON_Delete(pJsonRoot);
 41 
 42     return@H_403_30@ p;
 43 @H_403_30@}
 44 
 45 void parseJson(char *@H_403_30@ pMsg)
 46 @H_403_30@{
 47     if(NULL ==@H_403_30@ pMsg)
 48 @H_403_30@    {
 49         return@H_403_30@;
 50 @H_403_30@    }
 51     cJSON * pJson =@H_403_30@ cJSON_Parse(pMsg);
 52     if(NULL ==@H_403_30@ pJson)                                                                                         
 53 @H_403_30@    {
 54          parse faild,return
 55       return@H_403_30@ ;
 56 @H_403_30@    }
 57 
 58      get string from json
 59     cJSON * pSub = cJSON_GetObjectItem(pJson,128); line-height:1.5!important"> 60     if(NULL ==@H_403_30@ pSub)
 61 @H_403_30@    {
 62         get object named "hello" faild
 63 @H_403_30@    }
 64     printf(obj_1 : %s\n403_30@valuestring);
 65 
 66      get number from json
 67     pSub = cJSON_GetObjectItem(pJson,128); line-height:1.5!important"> 68      69 @H_403_30@    {
 70         get number from json faild
 71 @H_403_30@    }
 72     printf(obj_2 : %d\n403_30@valueint);
 73 
 74      get bool from json
 75     pSub = cJSON_GetObjectItem(pJson,128); line-height:1.5!important"> 76      77 @H_403_30@    {
 78          get bool from json faild
 79 @H_403_30@    }                                                                                                         
 80     printf(obj_3 : %d\n 81 
 82   get sub object
 83     pSub = cJSON_GetObjectItem(pJson,128); line-height:1.5!important"> 84      85 @H_403_30@    {
 86          get sub object faild
 87 @H_403_30@    }
 88     cJSON * pSubSub = cJSON_GetObjectItem(pSub,128); line-height:1.5!important"> 89     if(NULL ==@H_403_30@ pSubSub)
 90 @H_403_30@    {
 91          get object from subject object faild
 92 @H_403_30@    }
 93     printf(sub_obj_1 : %s\n403_30@valuestring);
 94 
 95 @H_403_30@    cJSON_Delete(pJson);
 96 @H_403_30@}
 97 
 98 int@H_403_30@ main()
 99 @H_403_30@{
100     char * p =@H_403_30@ makeJson();
101     102 @H_403_30@    {
103         return 0@H_403_30@;
104 @H_403_30@    }
105     printf(%s\n106 @H_403_30@    parseJson(p);                                                                                             
107 　　free(p);　　//千万不要忘记释放内存呀，cJSON_Print()函数或者cJSON_PrintUnformatted（）产生的内存，使用free(char *)进行释放
108     109 }