C++查找、更新redis中的嵌套hash示例-Go服务器开发

以下是一个示例代码，演示如何在C++中查找和更新Redis中的嵌套哈希：

#include <iostream>
#include <hiredis/hiredis.h>

int main() {
    redisContext* redis = redisConnect("localhost", 6379); // 连接到本地Redis服务器
    if (redis == NULL || redis->err) {
        std::cout << "连接到Redis失败: " << redis->errstr << std::endl;
        return 1;
    }

    // 示例数据
    std::string hashKey = "myhash";
    std::string subHashKey = "subhash";
    std::string nestedHashKey = "nestedhash";
    
    // 设置嵌套哈希值
    redisReply* reply = (redisReply*)redisCommand(redis, "HSET %s:%s:%s name John", hashKey.c_str(), subHashKey.c_str(), nestedHashKey.c_str());
    if (reply->type == REDIS_REPLY_ERROR) {
        std::cout << "设置嵌套哈希值时出错: " << reply->str << std::endl;
        freeReplyObject(reply);
        return 1;
    }
    
    // 获取嵌套哈希值
    reply = (redisReply*)redisCommand(redis, "HGET %s:%s:%s name", hashKey.c_str(), subHashKey.c_str(), nestedHashKey.c_str());
    if (reply->type == REDIS_REPLY_STRING) {
        std::cout << "获取到的嵌套哈希值为: " << reply->str << std::endl;
    } else {
        std::cout << "获取嵌套哈希值时出错: " << reply->str << std::endl;
    }
    freeReplyObject(reply);
    
    // 更新嵌套哈希值
    reply = (redisReply*)redisCommand(redis, "HSET %s:%s:%s name Tom", hashKey.c_str(), subHashKey.c_str(), nestedHashKey.c_str());
    if (reply->type == REDIS_REPLY_ERROR) {
        std::cout << "更新嵌套哈希值时出错: " << reply->str << std::endl;
        freeReplyObject(reply);
        return 1;
    }

    // 再次获取嵌套哈希值，验证是否更新成功
    reply = (redisReply*)redisCommand(redis, "HGET %s:%s:%s name", hashKey.c_str(), subHashKey.c_str(), nestedHashKey.c_str());
    if (reply->type == REDIS_REPLY_STRING) {
        std::cout << "更新后的嵌套哈希值为: " << reply->str << std::endl;
    } else {
        std::cout << "获取嵌套哈希值时出错: " << reply->str << std::endl;
    }
    freeReplyObject(reply);

    redisFree(redis); // 断开与Redis服务器的连接

    return 0;
}

请确保已经安装 hiredis 库，并在编译时链接该库（例如：-lhiredis）。此示例连接到本地 Redis 服务器，在指定的嵌套哈希中设置和获取键名为 name 的子键的值。

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