MongoDB的C语言编程实例

来源：互联网发布：花生壳域名建站编辑：程序博客网时间：2024/05/16 13:51

下面讲述在Linux平台下MongoDB的C语言编程实例

假设已经安装好了MongoDB。

1. 下载MongoDB的C语言驱动并安装

这里下载的MongoDB的C语言驱动是 mongo-c-driver-1.3.5.tar.gz。

解压后打开mongo-c-driver-1.3.5目录下的 README 文件，按其中讲的方法安装，如下：

  # tar xzf mongo-c-driver-1.3.5.tar.gz
  # cd mongo-c-driver-1.3.5
  # ./configure
  # make
  # sudo make install

2. 启动MongoDB

# mongod
2016-07-10T11:53:20.075+0800 I CONTROL [initandlisten] MongoDB starting : pid=3071 port=27017 dbpath=/data/db 64-bit host=localhost.localdomain
2016-07-10T11:53:20.076+0800 I CONTROL [initandlisten] db version v3.2.7
2016-07-10T11:53:20.076+0800 I CONTROL [initandlisten] git version: 4249c1d2b5999ebbf1fdf3bc0e0e3b3ff5c0aaf2
...

3. 编写连接MongoDB的程序 test.c

#include <bson.h>#include <bcon.h>#include <mongoc.h>intmain (int   argc,      char *argv[]){   mongoc_client_t      *client;   mongoc_database_t    *database;   mongoc_collection_t  *collection;   bson_t               *command,                         reply,                        *insert;   bson_error_t          error;   char                 *str;   bool                  retval;   /*    * Required to initialize libmongoc's internals    */   mongoc_init ();//初始化libmongoc驱动   /*    * Create a new client instance    */   client = mongoc_client_new ("mongodb://localhost:27017");//创建连接对象   /*    * Get a handle on the database "db_name" and collection "coll_name"    */   database = mongoc_client_get_database (client, "db_name");//获取数据库   collection = mongoc_client_get_collection (client, "db_name", "coll_name");//获取指定数据库和集合   /*    * Do work. This example pings the database, prints the result as JSON and    * performs an insert    */   command = BCON_NEW ("ping", BCON_INT32 (1));   retval = mongoc_client_command_simple (client, "admin", command, NULL, &reply, &error);//执行命令   if (!retval) {      fprintf (stderr, "%s\n", error.message);      return EXIT_FAILURE;   }   str = bson_as_json (&reply, NULL);   printf ("%s\n", str);   insert = BCON_NEW ("hello", BCON_UTF8 ("world"));//字段为hello，值为world字符串   if (!mongoc_collection_insert (collection, MONGOC_INSERT_NONE, insert, NULL, &error)) {//插入文档      fprintf (stderr, "%s\n", error.message);   }   bson_destroy (insert);   bson_destroy (&reply);   bson_destroy (command);   bson_free (str);   /*    * Release our handles and clean up libmongoc    */   mongoc_collection_destroy (collection);//释放表对象   mongoc_database_destroy (database);//释放数据库对象   mongoc_client_destroy (client);//释放连接对象   mongoc_cleanup ();//释放libmongoc驱动   return 0;}

4. 编译 test.c

# gcc -o test test.c -I/usr/local/include/libmongoc-1.0 -I/usr/local/include/libbson-1.0/ -lmongoc-1.0 -lbson-1.0

# ls
test test.c

5. 运行test

# ./test
{ "ok" : 1 }

连接MongoDB成功！

参阅：http://blog.csdn.net/chenjiayi_yun/article/details/50779284

0 0