linux下C++连接redis

谁借莪１个温暖的怀抱￠ 2022-03-18 14:44 540阅读 0赞

linux下c++连接redis,需要安装redis,同时还需要安装hiredis，hiredis是c++操作redis的api库。redis的安装这里不介绍了，很多教程。这里直接从hiredis安装说起。

1、下载hiredis，并解压。[https://github.com/redis/hiredis][https_github.com_redis_hiredis]

\[root@server software\]\# wget https://github.com/redis/hiredis/archive/v0.14.0.tar.gz

\[root@server software\]\# tar -xzf v0.14.0.tar.gz   
\[root@server software\]\# ls  
hiredis-0.14.0  maven  v0.14.0.tar.gz  
\[root@server software\]\# rm -f v0.14.0.tar.gz   
\[root@server software\]\# ls  
hiredis-0.14.0  maven  
\[root@server software\]\# cd hiredis-0.14.0/  
\[root@server hiredis-0.14.0\]\# ls  
adapters      async.c  CHANGELOG.md  dict.c  examples   hiredis.c  Makefile  net.h   read.h     sdsalloc.h  sds.h   win32.h  
appveyor.yml  async.h  COPYING       dict.h  fmacros.h  hiredis.h  net.c     read.c  README.md  sds.c       test.c

2、编译和安装hiredis，在hiredis解压目录下运行命令make,make install

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaW5pZmk_size_16_color_FFFFFF_t_70][]

3、编写简单的代码：

main.cpp

#include <iostream>
    #include <hiredis/hiredis.h>
    using namespace std;
    int main(){
        redisContext *c = redisConnect("127.0.0.1",6379);
        if(c->err){
           redisFree(c);
           cout<<"connect to redis fail"<<endl;
           return 1;
        }
        cout<<"connect to redis success"<<endl;
        redisReply *r = (redisReply*)redisCommand(c,"get name");
        cout<<r->str<<endl;
        return 0;
    }

4、编译运行，在编译运行之前，我们需要启动redis，命令行连接redis，并设置键值name=hiredis

\[root@server cppredis\]\# redis-cli  
127.0.0.1:6379> set name hiredis  
OK  
127.0.0.1:6379> get name  
"hiredis"  
127.0.0.1:6379> exit  
\[root@server cppredis\]\# cat main.cpp   
\#include <iostream>  
\#include <hiredis/hiredis.h>  
using namespace std;  
int main()\{  
    redisContext \*c = redisConnect("127.0.0.1",6379);  
    if(c->err)\{  
       redisFree(c);  
       cout<<"connect to redis fail"<<endl;  
       return 1;  
    \}  
    cout<<"connect to redis success"<<endl;  
    redisReply \*r = (redisReply\*)redisCommand(c,"get name");  
    cout<<r->str<<endl;  
    return 0;  
\}  
\[root@server cppredis\]\# ls  
main.cpp  
\[root@server cppredis\]\# g++ -lhiredis -o main main.cpp   
\[root@server cppredis\]\# ls  
main  main.cpp  
\[root@server cppredis\]\# ./main  
connect to redis success  
hiredis  
\[root@server cppredis\]\#

这里唯一需要注意的，就是编译main.cpp时，需要加入-lhiredis参数，指定hiredis的库。

贴上编译运行结果截图：

![20190221112215957.png][]

[https_github.com_redis_hiredis]: https://github.com/redis/hiredis
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZlaW5pZmk_size_16_color_FFFFFF_t_70]: /images/20220318/cb5b5f0a614a4196b3a64bf99c91f26c.png
[20190221112215957.png]: /images/20220318/f0616020a49248ac8001b04a33706658.png