golang-redis之hash类型简单操作
发布时间：2022-01-21 编辑：jiaochengji.com
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1：安装redigo
<pre class="prettyprint"><code class=" hljs cs">go <span class="hljs-keyword">get</span> github.com/garyburd/redigo/redis</code></pre>2：import redigo
<pre class="prettyprint"><code class=" hljs java"><span class="hljs-keyword">import</span> （ <span class="hljs-string">"github.com/garyburd/redigo/redis"</span> )</code></pre>3：连接redis
<pre class="prettyprint"><code class=" hljs vbscript">c, <span class="hljs-built_in">err</span> := redis.Dial(<span class="hljs-string">"tcp"</span>, <span class="hljs-string">"192.168.2.225:6379"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"connect to redis err"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) return } defer c.Close()</code></pre>4：命令执行
<pre class="prettyprint"><code class=" hljs php">n,err := c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hset"</span>,<span class="hljs-string">"key"</span>,<span class="hljs-string">"field"</span>,<span class="hljs-string">"value"</span>) <span class="hljs-comment">//写</span> result,err := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hgetall"</span>,<span class="hljs-string">"key"</span>))<span class="hljs-comment">//读</span></code></pre>5：hash常见命令
<pre class="prettyprint"><code class=" hljs vbnet">hset(<span class="hljs-keyword">key</span>, field, value)：向名称为<span class="hljs-keyword">key</span>的hash中添加元素field hget(<span class="hljs-keyword">key</span>, field)：返回名称为<span class="hljs-keyword">key</span>的hash中field对应的value hmget(<span class="hljs-keyword">key</span>, (fields))：返回名称为<span class="hljs-keyword">key</span>的hash中field i对应的value hmset(<span class="hljs-keyword">key</span>, (fields))：向名称为<span class="hljs-keyword">key</span>的hash中添加元素field hincrby(<span class="hljs-keyword">key</span>, field, <span class="hljs-built_in">integer</span>)：将名称为<span class="hljs-keyword">key</span>的hash中field的value增加<span class="hljs-built_in">integer</span> hexists(<span class="hljs-keyword">key</span>, field)：名称为<span class="hljs-keyword">key</span>的hash中是否存在键为field的域 hdel(<span class="hljs-keyword">key</span>, field)：删除名称为<span class="hljs-keyword">key</span>的hash中键为field的域 hlen(<span class="hljs-keyword">key</span>)：返回名称为<span class="hljs-keyword">key</span>的hash中元素个数 hkeys(<span class="hljs-keyword">key</span>)：返回名称为<span class="hljs-keyword">key</span>的hash中所有键 hvals(<span class="hljs-keyword">key</span>)：返回名称为<span class="hljs-keyword">key</span>的hash中所有键对应的value hgetall(<span class="hljs-keyword">key</span>)：返回名称为<span class="hljs-keyword">key</span>的hash中所有的键（field）及其对应的value</code></pre>6：示例
6.1：hset示例
6.2：hget示例
<pre class="prettyprint"><code class=" hljs vbscript">res, <span class="hljs-built_in">err</span> := c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hget"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"bike1"</span>) fmt.Println(reflect.TypeOf(res)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hget failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"hget value :%s\n"</span>, res.([]byte)) }</code></pre>6.3：hmset/hmget
<pre class="prettyprint"><code class=" hljs vbscript">_, <span class="hljs-built_in">err</span> = c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hmset"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"bike2"</span>, <span class="hljs-string">"bluegogo"</span>, <span class="hljs-string">"bike3"</span>, <span class="hljs-string">"xiaoming"</span>, <span class="hljs-string">"bike4"</span>, <span class="hljs-string">"xiaolan"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hmset error"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { value, <span class="hljs-built_in">err</span> := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hmget"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"bike1"</span>, <span class="hljs-string">"bike2"</span>, <span class="hljs-string">"bike3"</span>, <span class="hljs-string">"bike4"</span>)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hmget failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"hmget myhash's element :"</span>) <span class="hljs-keyword">for</span> _, v := range value { fmt.Printf(<span class="hljs-string">"%s "</span>, v.([]byte)) } fmt.Printf(<span class="hljs-string">"\n"</span>) } }</code></pre>6.4：hincrby
<pre class="prettyprint"><code class=" hljs vbscript">_, <span class="hljs-built_in">err</span> = c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hmset"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"bike2"</span>, <span class="hljs-string">"bluegogo"</span>, <span class="hljs-string">"bike3"</span>, <span class="hljs-string">"xiaoming"</span>, <span class="hljs-string">"bike4"</span>, <span class="hljs-string">"xiaolan"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hmset error"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { value, <span class="hljs-built_in">err</span> := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hmget"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"bike1"</span>, <span class="hljs-string">"bike2"</span>, <span class="hljs-string">"bike3"</span>, <span class="hljs-string">"bike4"</span>)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hmget failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"hmget myhash's element :"</span>) <span class="hljs-keyword">for</span> _, v := range value { fmt.Printf(<span class="hljs-string">"%s "</span>, v.([]byte)) } fmt.Printf(<span class="hljs-string">"\n"</span>) } }</code></pre>6.5：hexists
<pre class="prettyprint"><code class=" hljs vbscript">isExist, <span class="hljs-built_in">err</span> := c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hexists"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"tmpnum"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hexist failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Println(<span class="hljs-string">"exist or not:"</span>, isExist) }</code></pre>6.6：hlen
<pre class="prettyprint"><code class=" hljs vbscript">ilen, <span class="hljs-built_in">err</span> := c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hlen"</span>, <span class="hljs-string">"myhash"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hlen failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Println(<span class="hljs-string">"myhash's len is :"</span>, ilen) }</code></pre>6.7：hkeys
<pre class="prettyprint"><code class=" hljs vbscript">resKeys, <span class="hljs-built_in">err</span> := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hkeys"</span>, <span class="hljs-string">"myhash"</span>)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hkeys failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"myhash's keys is :"</span>) <span class="hljs-keyword">for</span> _, v := range resKeys { fmt.Printf(<span class="hljs-string">"%s "</span>, v.([]byte)) } fmt.Println() }</code></pre>6.8：hvals
<pre class="prettyprint"><code class=" hljs vbscript">resValues, <span class="hljs-built_in">err</span> := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hvals"</span>, <span class="hljs-string">"myhash"</span>)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hvals failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"myhash's values is:"</span>) <span class="hljs-keyword">for</span> _, v := range resValues { fmt.Printf(<span class="hljs-string">"%s "</span>, v.([]byte)) } fmt.Println() }</code></pre>6.9：hdel
<pre class="prettyprint"><code class=" hljs vbscript">_, <span class="hljs-built_in">err</span> = c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"HDEL"</span>, <span class="hljs-string">"myhash"</span>, <span class="hljs-string">"tmpnum"</span>) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hdel failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) }</code></pre>6.10：hgetall
<pre class="prettyprint"><code class=" hljs vbscript">result, <span class="hljs-built_in">err</span> := redis.Values(c.<span class="hljs-keyword">Do</span>(<span class="hljs-string">"hgetall"</span>, <span class="hljs-string">"myhash"</span>)) <span class="hljs-keyword">if</span> <span class="hljs-built_in">err</span> != nil { fmt.Println(<span class="hljs-string">"hgetall failed"</span>, <span class="hljs-built_in">err</span>.<span class="hljs-keyword">Error</span>()) } <span class="hljs-keyword">else</span> { fmt.Printf(<span class="hljs-string">"all keys and values are:"</span>) <span class="hljs-keyword">for</span> _, v := range result { fmt.Printf(<span class="hljs-string">"%s "</span>, v.([]byte)) } fmt.Println() }</code></pre>7：结果 
完整代码路径
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