C JSON是一種輕量級的數(shù)據(jù)交換格式,適用于各種語言,包括C語言。在開發(fā)過程中,我們經(jīng)常會遇到需要將C JSON數(shù)據(jù)存入數(shù)據(jù)庫的需求。下面我們將介紹如何使用C JSON將數(shù)據(jù)存儲到數(shù)據(jù)庫中。
首先,我們需要連接數(shù)據(jù)庫。這里以MySQL數(shù)據(jù)庫為例:
MYSQL *connection; MYSQL_RES *result; MYSQL_ROW row; char *server = "localhost"; char *user = "root"; char *password = "123456"; char *database = "test"; connection = mysql_init(NULL); mysql_real_connect(connection, server, user, password, database, 0, NULL, 0);
然后,我們需要定義一個C JSON對象,并將要存儲的數(shù)據(jù)填入:
json_object *jobj = json_object_new_object(); json_object *jname = json_object_new_string("張三"); json_object *jage = json_object_new_int(18); json_object *jsex = json_object_new_string("男"); json_object_object_add(jobj, "name", jname); json_object_object_add(jobj, "age", jage); json_object_object_add(jobj, "sex", jsex);
接下來,我們將C JSON對象轉(zhuǎn)換為字符串:
const char *json_str = json_object_to_json_string(jobj);
最后,我們將字符串存入數(shù)據(jù)庫:
char *sql = "INSERT INTO student(name,age,sex) VALUES('%s',%d,'%s')"; char query[1024]; sprintf(query, sql, json_object_get_string(jname), json_object_get_int(jage), json_object_get_string(jsex)); mysql_query(connection, query);
通過以上步驟,我們就可以將C JSON數(shù)據(jù)存入數(shù)據(jù)庫中了。當(dāng)然,在實際開發(fā)過程中,還需要考慮數(shù)據(jù)類型轉(zhuǎn)換等問題。但總的來說,使用C JSON存儲數(shù)據(jù)到數(shù)據(jù)庫并不難,只需要按照上述步驟進(jìn)行即可。