{"id":256,"date":"2023-02-24T06:13:13","date_gmt":"2023-02-23T22:13:13","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=256"},"modified":"2023-04-30T15:18:15","modified_gmt":"2023-04-30T07:18:15","slug":"redis-string","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/24\/redis-string\/","title":{"rendered":"Redis \u5b57\u7b26\u4e32(String)"},"content":{"rendered":"<h2>Redis \u5b57\u7b26\u4e32(String)<\/h2>\n<p>Redis \u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\u7684\u76f8\u5173\u547d\u4ee4\u7528\u4e8e\u7ba1\u7406 redis \u5b57\u7b26\u4e32\u503c\uff0c\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; COMMAND KEY_NAME<\/code><\/pre>\n<p><!-- more --><\/p>\n<p><strong>\u5b9e\u4f8b<\/strong><\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; SET appblog redis\nOK\nredis 127.0.0.1:6379&gt; GET appblog\n&quot;redis&quot;<\/code><\/pre>\n<p>\u5728\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d\u6211\u4eec\u4f7f\u7528\u4e86 SET \u548c GET \u547d\u4ee4\uff0c\u952e\u4e3a appblog<\/p>\n<h2>Redis \u5b57\u7b26\u4e32\u547d\u4ee4<\/h2>\n<h3>set key value<\/h3>\n<p>\u8bbe\u7f6e\u6307\u5b9a key \u7684\u503c<\/p>\n<h3>get key<\/h3>\n<p>\u83b7\u53d6\u6307\u5b9a key \u7684\u503c<\/p>\n<h3>getrange key start end<\/h3>\n<p>Redis Getrange \u547d\u4ee4\u7528\u4e8e\u83b7\u53d6\u5b58\u50a8\u5728\u6307\u5b9a key \u4e2d\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u5b57\u7b26\u4e32\u7684\u622a\u53d6\u8303\u56f4\u7531 start \u548c end \u4e24\u4e2a\u504f\u79fb\u91cf\u51b3\u5b9a(\u5305\u62ec start \u548c end \u5728\u5185)<\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; set mykey &quot;This is my test key&quot;\nOK\nredis 127.0.0.1:6379&gt; getrange mykey 0 3\n&quot;This&quot;\nredis 127.0.0.1:6379&gt; getrange mykey 0 -1\n&quot;This is my test key&quot;<\/code><\/pre>\n<h3>getset key value<\/h3>\n<p>\u5c06\u7ed9\u5b9a key \u7684\u503c\u8bbe\u4e3a value \uff0c\u5e76\u8fd4\u56de key \u7684\u65e7\u503c(old value)<\/p>\n<ul>\n<li>\u8fd4\u56de\u7ed9\u5b9a key \u7684\u65e7\u503c\u3002\u5f53 key \u6ca1\u6709\u65e7\u503c\u65f6\uff0c\u5373 key \u4e0d\u5b58\u5728\u65f6\uff0c\u8fd4\u56de nil<\/li>\n<li>\u5f53 key \u5b58\u5728\u4f46\u4e0d\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\u65f6\uff0c\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">redis&gt; GETSET db mongodb    # \u6ca1\u6709\u65e7\u503c\uff0c\u8fd4\u56de nil\n(nil)\n\nredis&gt; GET db\n&quot;mongodb&quot;\n\nredis&gt; GETSET db redis      # \u8fd4\u56de\u65e7\u503c mongodb\n&quot;mongodb&quot;\n\nredis&gt; GET db\n&quot;redis&quot;<\/code><\/pre>\n<h3>getbit key offset<\/h3>\n<p>\u5bf9 key \u6240\u50a8\u5b58\u7684\u5b57\u7b26\u4e32\u503c\uff0c\u83b7\u53d6\u6307\u5b9a\u504f\u79fb\u91cf\u4e0a\u7684\u4f4d(bit)<\/p>\n<p>\u5f53\u504f\u79fb\u91cf OFFSET \u6bd4\u5b57\u7b26\u4e32\u503c\u7684\u957f\u5ea6\u5927\uff0c\u6216\u8005 key \u4e0d\u5b58\u5728\u65f6\uff0c\u8fd4\u56de 0<\/p>\n<pre><code class=\"language-bash\"># \u5bf9\u4e0d\u5b58\u5728\u7684 key \u6216\u8005\u4e0d\u5b58\u5728\u7684 offset \u8fdb\u884c GETBIT\uff0c\u8fd4\u56de 0\n\nredis&gt; EXISTS bit\n(integer) 0\n\nredis&gt; GETBIT bit 10086\n(integer) 0\n\n# \u5bf9\u5df2\u5b58\u5728\u7684 offset \u8fdb\u884c GETBIT\n\nredis&gt; SETBIT bit 10086 1\n(integer) 0\n\nredis&gt; GETBIT bit 10086\n(integer) 1<\/code><\/pre>\n<h3>mget key1 [key2..]<\/h3>\n<p>\u83b7\u53d6\u6240\u6709(\u4e00\u4e2a\u6216\u591a\u4e2a)\u7ed9\u5b9a key \u7684\u503c<\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; SET key1 &quot;hello&quot;\nOK\nredis 127.0.0.1:6379&gt; SET key2 &quot;world&quot;\nOK\nredis 127.0.0.1:6379&gt; MGET key1 key2 someOtherKey\n1) &quot;Hello&quot;\n2) &quot;World&quot;\n3) (nil)<\/code><\/pre>\n<h3>setbit key offset value<\/h3>\n<p>\u5bf9 key \u6240\u50a8\u5b58\u7684\u5b57\u7b26\u4e32\u503c\uff0c\u8bbe\u7f6e\u6216\u6e05\u9664\u6307\u5b9a\u504f\u79fb\u91cf\u4e0a\u7684\u4f4d(bit)<\/p>\n<pre><code class=\"language-bash\">redis&gt; SETBIT bit 10086 1\n(integer) 0\n\nredis&gt; GETBIT bit 10086\n(integer) 1\n\nredis&gt; GETBIT bit 100   # bit \u9ed8\u8ba4\u88ab\u521d\u59cb\u5316\u4e3a 0\n(integer) 0<\/code><\/pre>\n<h3>setex key seconds value<\/h3>\n<p>\u5c06\u503c value \u5173\u8054\u5230 key \uff0c\u5e76\u5c06 key \u7684\u8fc7\u671f\u65f6\u95f4\u8bbe\u4e3a seconds (\u4ee5\u79d2\u4e3a\u5355\u4f4d)<\/p>\n<p>Setex \u547d\u4ee4\u4e3a\u6307\u5b9a\u7684 key \u8bbe\u7f6e\u503c\u53ca\u5176\u8fc7\u671f\u65f6\u95f4\u3002\u5982\u679c key \u5df2\u7ecf\u5b58\u5728\uff0cSETEX \u547d\u4ee4\u5c06\u4f1a\u66ff\u6362\u65e7\u7684\u503c<\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; SETEX mykey 60 redis\nOK\nredis 127.0.0.1:6379&gt; TTL mykey\n60\nredis 127.0.0.1:6379&gt; GET mykey\n&quot;redis&quot;<\/code><\/pre>\n<h3>setnx key value<\/h3>\n<p>Setnx\uff08SET if Not eXists\uff09\u547d\u4ee4\u53ea\u6709\u5728 key \u4e0d\u5b58\u5728\u65f6\u8bbe\u7f6e key \u7684\u503c<\/p>\n<pre><code class=\"language-bash\">redis&gt; EXISTS job                # job \u4e0d\u5b58\u5728\n(integer) 0\n\nredis&gt; SETNX job &quot;programmer&quot;    # job \u8bbe\u7f6e\u6210\u529f\n(integer) 1\n\nredis&gt; SETNX job &quot;code-farmer&quot;   # \u5c1d\u8bd5\u8986\u76d6 job \uff0c\u5931\u8d25\n(integer) 0\n\nredis&gt; GET job                   # \u6ca1\u6709\u88ab\u8986\u76d6\n&quot;programmer&quot;<\/code><\/pre>\n<h3>setrange key offset value<\/h3>\n<p>\u7528 value \u53c2\u6570\u8986\u5199\u7ed9\u5b9a key \u6240\u50a8\u5b58\u7684\u5b57\u7b26\u4e32\u503c\uff0c\u4ece\u504f\u79fb\u91cf offset \u5f00\u59cb<\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; SET key1 &quot;Hello World&quot;\nOK\nredis 127.0.0.1:6379&gt; SETRANGE key1 6 &quot;Redis&quot;\n(integer) 11\nredis 127.0.0.1:6379&gt; GET key1\n&quot;Hello Redis&quot;<\/code><\/pre>\n<h3>strlen key<\/h3>\n<p>\u8fd4\u56de key \u6240\u50a8\u5b58\u7684\u5b57\u7b26\u4e32\u503c\u7684\u957f\u5ea6<\/p>\n<p>\u5f53 key \u4e0d\u5b58\u5728\u65f6\uff0c\u8fd4\u56de 0<\/p>\n<h3>mset key value [key value &#8230;]<\/h3>\n<p>\u540c\u65f6\u8bbe\u7f6e\u4e00\u4e2a\u6216\u591a\u4e2a key-value \u5bf9<\/p>\n<pre><code class=\"language-bash\">redis 127.0.0.1:6379&gt; MSET key1 &quot;Hello&quot; key2 &quot;World&quot;\nOK\nredis 127.0.0.1:6379&gt; GET key1\n&quot;Hello&quot;\nredis 127.0.0.1:6379&gt; GET key2\n&quot;World&quot;<\/code><\/pre>\n<h3>msetnx key value [key value &#8230;]<\/h3>\n<p>\u540c\u65f6\u8bbe\u7f6e\u4e00\u4e2a\u6216\u591a\u4e2a key-value \u5bf9\uff0c\u5f53\u4e14\u4ec5\u5f53<strong>\u6240\u6709\u7ed9\u5b9a key<\/strong> \u90fd\u4e0d\u5b58\u5728<\/p>\n<ul>\n<li>\u5f53\u6240\u6709 key \u90fd\u6210\u529f\u8bbe\u7f6e\uff0c\u8fd4\u56de 1<\/li>\n<li>\u5982\u679c\u6240\u6709\u7ed9\u5b9a key \u90fd\u8bbe\u7f6e\u5931\u8d25(\u81f3\u5c11\u6709\u4e00\u4e2a key \u5df2\u7ecf\u5b58\u5728)\uff0c\u90a3\u4e48\u8fd4\u56de 0<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># \u5bf9\u4e0d\u5b58\u5728\u7684 key \u8fdb\u884c MSETNX\n\nredis&gt; MSETNX rmdbs &quot;MySQL&quot; nosql &quot;MongoDB&quot; key-value-store &quot;redis&quot;\n(integer) 1\n\nredis&gt; MGET rmdbs nosql key-value-store\n1) &quot;MySQL&quot;\n2) &quot;MongoDB&quot;\n3) &quot;redis&quot;\n\n# mset \u7684\u7ed9\u5b9a key \u5f53\u4e2d\u6709\u5df2\u5b58\u5728\u7684 key\n\nredis&gt; MSETNX rmdbs &quot;Sqlite&quot; language &quot;python&quot;  # rmdbs \u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u64cd\u4f5c\u5931\u8d25\n(integer) 0\n\nredis&gt; EXISTS language                          # \u56e0\u4e3a MSET \u662f\u539f\u5b50\u6027\u64cd\u4f5c\uff0clanguage \u6ca1\u6709\u88ab\u8bbe\u7f6e\n(integer) 0\n\nredis&gt; GET rmdbs                                # rmdbs \u4e5f\u6ca1\u6709\u88ab\u4fee\u6539\n&quot;MySQL&quot;<\/code><\/pre>\n<h3>psetex key milliseconds value<\/h3>\n<p>\u8fd9\u4e2a\u547d\u4ee4\u548c SETEX \u547d\u4ee4\u76f8\u4f3c\uff0c\u4f46\u5b83\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u8bbe\u7f6e key \u7684\u751f\u5b58\u65f6\u95f4\uff0c\u800c\u4e0d\u662f\u50cf SETEX \u547d\u4ee4\u90a3\u6837\uff0c\u4ee5\u79d2\u4e3a\u5355\u4f4d<\/p>\n<h3>incr key<\/h3>\n<p>\u5c06 key \u4e2d\u50a8\u5b58\u7684\u6570\u5b57\u503c\u589e\u4e00<\/p>\n<ul>\n<li>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 key \u7684\u503c\u4f1a\u5148\u88ab\u521d\u59cb\u5316\u4e3a 0\uff0c\u7136\u540e\u518d\u6267\u884c INCR \u64cd\u4f5c<\/li>\n<li>\u5982\u679c\u503c\u5305\u542b\u9519\u8bef\u7684\u7c7b\u578b\uff0c\u6216\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u503c\u4e0d\u80fd\u8868\u793a\u4e3a\u6570\u5b57\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef<\/li>\n<li>\u672c\u64cd\u4f5c\u7684\u503c\u9650\u5236\u5728 64 \u4f4d(bit)\u6709\u7b26\u53f7\u6570\u5b57\u8868\u793a\u4e4b\u5185<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">redis&gt; SET page_view 20\nOK\n\nredis&gt; INCR page_view\n(integer) 21\n\nredis&gt; GET page_view    # \u6570\u5b57\u503c\u5728 Redis \u4e2d\u4ee5\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u4fdd\u5b58\n&quot;21&quot;<\/code><\/pre>\n<h3>incrby key increment<\/h3>\n<p>\u5c06 key \u6240\u50a8\u5b58\u7684\u503c\u52a0\u4e0a\u7ed9\u5b9a\u7684\u589e\u91cf\u503c\uff08increment\uff09<\/p>\n<ul>\n<li>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 key \u7684\u503c\u4f1a\u5148\u88ab\u521d\u59cb\u5316\u4e3a 0 \uff0c\u7136\u540e\u518d\u6267\u884c INCRBY \u547d\u4ee4<\/li>\n<li>\u5982\u679c\u503c\u5305\u542b\u9519\u8bef\u7684\u7c7b\u578b\uff0c\u6216\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u503c\u4e0d\u80fd\u8868\u793a\u4e3a\u6570\u5b57\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef<\/li>\n<li>\u672c\u64cd\u4f5c\u7684\u503c\u9650\u5236\u5728 64 \u4f4d(bit)\u6709\u7b26\u53f7\u6570\u5b57\u8868\u793a\u4e4b\u5185<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># key \u5b58\u5728\u4e14\u662f\u6570\u5b57\u503c\n\nredis&gt; SET rank 50\nOK\n\nredis&gt; INCRBY rank 20\n(integer) 70\n\nredis&gt; GET rank\n&quot;70&quot;\n\n# key \u4e0d\u5b58\u5728\u65f6\n\nredis&gt; EXISTS counter\n(integer) 0\n\nredis&gt; INCRBY counter 30\n(integer) 30\n\nredis&gt; GET counter\n&quot;30&quot;\n\n# key \u4e0d\u662f\u6570\u5b57\u503c\u65f6\n\nredis&gt; SET book &quot;long long ago...&quot;\nOK\n\nredis&gt; INCRBY book 200\n(error) ERR value is not an integer or out of range<\/code><\/pre>\n<h3>incrbyfloat key increment<\/h3>\n<p>\u5c06 key \u6240\u50a8\u5b58\u7684\u503c\u52a0\u4e0a\u7ed9\u5b9a\u7684\u6d6e\u70b9\u589e\u91cf\u503c\uff08increment\uff09<\/p>\n<p>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 INCRBYFLOAT \u4f1a\u5148\u5c06 key \u7684\u503c\u8bbe\u4e3a 0\uff0c\u518d\u6267\u884c\u52a0\u6cd5\u64cd\u4f5c<\/p>\n<pre><code class=\"language-bash\"># \u503c\u548c\u589e\u91cf\u90fd\u4e0d\u662f\u6307\u6570\u7b26\u53f7\n\nredis&gt; SET mykey 10.50\nOK\n\nredis&gt; INCRBYFLOAT mykey 0.1\n&quot;10.6&quot;\n\n# \u503c\u548c\u589e\u91cf\u90fd\u662f\u6307\u6570\u7b26\u53f7\n\nredis&gt; SET mykey 314e-2\nOK\n\nredis&gt; GET mykey                # \u7528 SET \u8bbe\u7f6e\u7684\u503c\u53ef\u4ee5\u662f\u6307\u6570\u7b26\u53f7\n&quot;314e-2&quot;\n\nredis&gt; INCRBYFLOAT mykey 0      # \u4f46\u6267\u884c INCRBYFLOAT \u4e4b\u540e\u683c\u5f0f\u4f1a\u88ab\u6539\u6210\u975e\u6307\u6570\u7b26\u53f7\n&quot;3.14&quot;\n\n# \u53ef\u4ee5\u5bf9\u6574\u6570\u7c7b\u578b\u6267\u884c\n\nredis&gt; SET mykey 3\nOK\n\nredis&gt; INCRBYFLOAT mykey 1.1\n&quot;4.1&quot;\n\n# \u540e\u8ddf\u7684 0 \u4f1a\u88ab\u79fb\u9664\n\nredis&gt; SET mykey 3.0\nOK\n\nredis&gt; GET mykey                                    # SET \u8bbe\u7f6e\u7684\u503c\u5c0f\u6570\u90e8\u5206\u53ef\u4ee5\u662f 0\n&quot;3.0&quot;\n\nredis&gt; INCRBYFLOAT mykey 1.000000000000000000000    # \u4f46 INCRBYFLOAT \u4f1a\u5c06\u65e0\u7528\u7684 0 \u5ffd\u7565\u6389\uff0c\u6709\u9700\u8981\u7684\u8bdd\uff0c\u5c06\u6d6e\u70b9\u53d8\u4e3a\u6574\u6570\n&quot;4&quot;\n\nredis&gt; GET mykey\n&quot;4&quot;<\/code><\/pre>\n<h3>decr key<\/h3>\n<p>\u5c06 key \u4e2d\u50a8\u5b58\u7684\u6570\u5b57\u503c\u51cf\u4e00<\/p>\n<ul>\n<li>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 key \u7684\u503c\u4f1a\u5148\u88ab\u521d\u59cb\u5316\u4e3a 0\uff0c\u7136\u540e\u518d\u6267\u884c DECR \u64cd\u4f5c<\/li>\n<li>\u5982\u679c\u503c\u5305\u542b\u9519\u8bef\u7684\u7c7b\u578b\uff0c\u6216\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u503c\u4e0d\u80fd\u8868\u793a\u4e3a\u6570\u5b57\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef<\/li>\n<li>\u672c\u64cd\u4f5c\u7684\u503c\u9650\u5236\u5728 64 \u4f4d(bit)\u6709\u7b26\u53f7\u6570\u5b57\u8868\u793a\u4e4b\u5185<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># \u5bf9\u5b58\u5728\u7684\u6570\u5b57\u503c key \u8fdb\u884c DECR\n\nredis&gt; SET failure_times 10\nOK\n\nredis&gt; DECR failure_times\n(integer) 9\n\n# \u5bf9\u4e0d\u5b58\u5728\u7684 key \u503c\u8fdb\u884c DECR\n\nredis&gt; EXISTS count\n(integer) 0\n\nredis&gt; DECR count\n(integer) -1\n\n# \u5bf9\u5b58\u5728\u4f46\u4e0d\u662f\u6570\u503c\u7684 key \u8fdb\u884c DECR\n\nredis&gt; SET company YOUR_CODE_SUCKS.LLC\nOK\n\nredis&gt; DECR company\n(error) ERR value is not an integer or out of range<\/code><\/pre>\n<h3>decrby key decrement<\/h3>\n<p>key \u6240\u50a8\u5b58\u7684\u503c\u51cf\u53bb\u7ed9\u5b9a\u7684\u51cf\u91cf\u503c\uff08decrement\uff09<\/p>\n<ul>\n<li>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 key \u7684\u503c\u4f1a\u5148\u88ab\u521d\u59cb\u5316\u4e3a 0\uff0c\u7136\u540e\u518d\u6267\u884c DECRBY \u64cd\u4f5c<\/li>\n<li>\u5982\u679c\u503c\u5305\u542b\u9519\u8bef\u7684\u7c7b\u578b\uff0c\u6216\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u503c\u4e0d\u80fd\u8868\u793a\u4e3a\u6570\u5b57\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef<\/li>\n<li>\u672c\u64cd\u4f5c\u7684\u503c\u9650\u5236\u5728 64 \u4f4d(bit)\u6709\u7b26\u53f7\u6570\u5b57\u8868\u793a\u4e4b\u5185<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># \u5bf9\u5df2\u5b58\u5728\u7684 key \u8fdb\u884c DECRBY\n\nredis&gt; SET count 100\nOK\n\nredis&gt; DECRBY count 20\n(integer) 80\n\n# \u5bf9\u4e0d\u5b58\u5728\u7684 key \u8fdb\u884cDECRBY\n\nredis&gt; EXISTS pages\n(integer) 0\n\nredis&gt; DECRBY pages 10\n(integer) -10<\/code><\/pre>\n<h3>APPEND key value<\/h3>\n<p>\u5982\u679c key \u5df2\u7ecf\u5b58\u5728\u5e76\u4e14\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0cAPPEND \u547d\u4ee4\u5c06\u6307\u5b9a\u7684 value \u8ffd\u52a0\u5230\u8be5 key \u539f\u6765\u503c\uff08value\uff09\u7684\u672b\u5c3e<\/p>\n<ul>\n<li>\u5982\u679c key \u5df2\u7ecf\u5b58\u5728\u5e76\u4e14\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0cAPPEND \u547d\u4ee4\u5c06 value \u8ffd\u52a0\u5230 key \u539f\u6765\u7684\u503c\u7684\u672b\u5c3e<\/li>\n<li>\u5982\u679c key \u4e0d\u5b58\u5728\uff0c APPEND \u5c31\u7b80\u5355\u5730\u5c06\u7ed9\u5b9a key \u8bbe\u4e3a value\uff0c\u5c31\u50cf\u6267\u884c SET key value \u4e00\u6837<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># \u5bf9\u4e0d\u5b58\u5728\u7684 key \u6267\u884c APPEND\n\nredis&gt; EXISTS myphone               # \u786e\u4fdd myphone \u4e0d\u5b58\u5728\n(integer) 0\n\nredis&gt; APPEND myphone &quot;iphone&quot;       # \u5bf9\u4e0d\u5b58\u5728\u7684 key \u8fdb\u884c APPEND \uff0c\u7b49\u540c\u4e8e SET myphone &quot;iphone&quot;\n(integer) 5                         # \u5b57\u7b26\u957f\u5ea6\n\n# \u5bf9\u5df2\u5b58\u5728\u7684\u5b57\u7b26\u4e32\u8fdb\u884c APPEND\n\nredis&gt; APPEND myphone &quot; - 13&quot;     # \u957f\u5ea6\u4ece 5 \u4e2a\u5b57\u7b26\u589e\u52a0\u5230 12 \u4e2a\u5b57\u7b26\n(integer) 12\n\nredis&gt; GET myphone\n&quot;iphone - 13&quot;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u5b57\u7b26\u4e32(String) Redis \u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\u7684\u76f8\u5173\u547d\u4ee4\u7528\u4e8e\u7ba1\u7406 redis \u5b57\u7b26\u4e32\u503c\uff0c\u57fa\u672c\u8bed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-256","post","type-post","status-publish","format-standard","hentry","category-redis"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=256"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/256\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}