Android下json-c库使用

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json_object* json_tokener_parse(const char *str);

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json_object* json_object_from_file(const char *filename);

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extern json_bool json_object_object_get_ex(struct json_object* obj,const char *key,struct json_object **value);

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Void json_object_put(struct json_object * this)；

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struct json_object * json_object_new_object();

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struct json_object * json_object_new_array();

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struct json_object * json_object_object_get(struct json_object * json,char *name);

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Void json_object_put(struct json_object * this)；

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char * json_object_to_json_string(struct json_object * this);

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void json_object_object_add(struct json_object* obj, char *key, struct json_object *val);

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void json_object_object_del(struct json_object* obj, char *key);

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int json_object_array_length(struct json_object *obj);

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extern int json_object_array_add(struct json_object *obj, struct json_object *val);

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int json_object_array_put_idx(struct json_object *obj, int idx, struct json_object *val);

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struct json_object * json_object_array_get_idx(struct json_object * json_array,int i);

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enum json_type json_object_get_type(struct json_object * this )

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#include <stdio.h>
#include <json-c/json.h>
 
/*
{
  Name: haha,
  Id:   101,
  Age:  21,
  info:{
    number:  1,
    score:  91,
    type:    2,
    params: ""
  }
}
*/
 
// gcc json-c_parse_string.c -ljson-c
int main(int argc, char const *argv[])
{
  /* Declaring the json data's in json format. */
  char buf[] = "{ "Name": "haha", "Id": 101, "Age": 21, "info": { "number": 1, "score": 91, "type": 2, "params": "w" } }";
 
  /* Declaring the json_object. To pass the Json string to the newly created json_object. */
  json_object *new_obj = json_tokener_parse(buf);
  if (!new_obj)
    return -1;
 
  json_object *val_obj = NULL;
  json_object *result = NULL;
  const char *str = NULL;
 
  /* To get the data's then we have to get to the specific node by using the below function. */
 
  if( json_object_object_get_ex(new_obj, "Name", &val_obj) ) {
    str = json_object_get_string(val_obj);
    printf("Name: %sn", str);
  }
  if( json_object_object_get_ex(new_obj, "Id", &val_obj) ) {
    str = json_object_get_string(val_obj);
    printf("Id: %sn", str);
  }
  if( json_object_object_get_ex(new_obj, "Age", &val_obj) ) {
    str = json_object_get_string(val_obj);
    printf("Age: %sn", str);
  }
 
  if( json_object_object_get_ex(new_obj, "info", &val_obj) ) {
    if( json_object_object_get_ex(val_obj, "number", &result) ) {
      printf("tinfo -> number: %dn", json_object_get_int(result));
    }
    if( json_object_object_get_ex(val_obj, "score", &result) ) {
      printf("tinfo -> score: %dn", json_object_get_int(result));
    }
    if( json_object_object_get_ex(val_obj, "type", &result) ) {
      printf("tinfo -> type: %dn", json_object_get_int(result));
    }
    if( json_object_object_get_ex(val_obj, "params", &result) ) {
      printf("tinfo -> params: %sn", json_object_get_string(result));
    }
  }
 
  json_object_put(new_obj); // to return the pointer to its originalobjects
 
  return 0;
}